CN106119528B - A kind of system and method for improving sintering process - Google Patents
A kind of system and method for improving sintering process Download PDFInfo
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- CN106119528B CN106119528B CN201610687313.8A CN201610687313A CN106119528B CN 106119528 B CN106119528 B CN 106119528B CN 201610687313 A CN201610687313 A CN 201610687313A CN 106119528 B CN106119528 B CN 106119528B
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/212—Sintering; Agglomerating in tunnel furnaces
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Abstract
The invention discloses a kind of system and method for improving sintering process, belong to SINTERING TECHNOLOGY field.The system for improving sintering process includes：Hot waste gas collection device, hot waste gas transmission pipeline and loose metal preheating device；Hot waste gas collection device is connected with central cooler；The both ends of hot waste gas transmission pipeline are connected with hot waste gas collection device and loose metal preheating device respectively, and hot waste gas caused by central cooler is collected and transmitted to hot waste gas transmission pipeline by hot waste gas collection device；Loose metal preheating device is arranged in the frame of sintering machine, and loose metal preheating device is sintered the sinter mixture parcel on the chassis of machine, and loose metal preheating device carries out loose and heating to sinter mixture using the hot waste gas that hot waste gas transmission pipeline transmits.The present invention fully carries out loose and heating by loose metal preheating device using caused hot waste gas in sintering process to sinter mixture, can effectively improve the temperature of sinter mixture, improve the gas permeability of sinter mixture, improve sintering process.
Description
Technical Field
The invention relates to the technical field of sintering processes, in particular to a system and a method for improving a sintering process.
Background
Sintering refers to a process of converting mixed iron-containing powder particles into a compact body, and the mixed iron-containing powder particles can be called a sintering mixture, namely a process of bonding the sintering mixture into blocks by a sintering machine through a series of physical and chemical changes of the sintering mixture. At present, a thick material layer sintering process is widely applied, the thick material layer sintering process needs to sinter under the condition that the paving thickness of a sintering mixture is kept high, the thick material layer sintering process can better utilize heat, the fuel consumption is reduced, and the average strength and the yield of sintering ores are improved.
The sintering reaction carries out the in-process, along the thickness direction of arranging the sinter mixture on the sintering machine platform truck, can form different layers, including sintering ore deposit, combustion layer, preheating layer and wet layer etc. wherein, there is more moisture condensation in the wet layer, and is very big to the gas permeability of bed of material influence, is unfavorable for going on of sintering process, and in thick bed sintering process, the thickness of sinter mixture is thicker, can make the gas permeability of bed of material further worsen. At present, a steam heating method is adopted to heat the sintering mixture, namely a steam heating device is arranged on a mixture bin of a sintering machine, steam nozzles of the steam heating device are arranged around the mixture bin, and hot steam is sprayed to the sintering mixture through the steam nozzles to increase the temperature of a material layer to be close to the dew point temperature, so that the adverse effect of an over-wet layer is reduced or eliminated.
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:
the steam nozzles are arranged around the mixture bin, so that the heating effect on the sintering mixture close to the steam nozzles is better, namely the heating effect on the sintering mixture on the top layer on the trolley is better, the sintering mixture on the middle layer and the bottom layer cannot be fully contacted with hot steam, and the heating effect is not ideal; meanwhile, the over-wet layer is mainly located at the bottom layer of the sintering mixture and cannot be fully contacted with hot steam, so that the air permeability of the material layer is not ideal, and in the thick material layer sintering process, the air permeability is inversely proportional to the thickness of the material layer, and the sintering process can be influenced if the air permeability is poor.
Disclosure of Invention
To solve the problems of the prior art, in one aspect, an embodiment of the present invention provides a system for improving a sintering process, including: the device comprises a hot waste gas collecting device, a hot waste gas transmission pipeline and a loose material preheating device;
the hot waste gas collecting device is connected with the circular cooler;
the two ends of the hot waste gas transmission pipeline are respectively connected with a hot waste gas collecting device and a loose material preheating device, and the hot waste gas collecting device collects the hot waste gas generated by the circular cooler and transmits the hot waste gas to the hot waste gas transmission pipeline;
the loose material preheating device is arranged on a rack of the sintering machine, the loose material preheating device is wrapped by the sintering mixture on a trolley of the sintering machine, and the loose material preheating device utilizes hot waste gas transmitted by the hot waste gas transmission pipeline to loosen and heat the sintering mixture.
The pine material preheating device includes: the air duct distribution pipeline is arranged on the base fixing frame;
the basic fixing frame is arranged on a rack of the sintering machine;
the air path distribution pipeline is arranged on the foundation fixing frame, a hot air inlet is arranged in the middle of the air path distribution pipeline, at least one exhaust outlet is also arranged on the air path distribution pipeline, and each exhaust outlet is connected with one exhaust pipeline;
the outlet of each exhaust pipeline is wrapped by the sintering mixture and is used for ejecting the hot waste gas transmitted by the hot waste gas transmission pipeline.
And an included angle formed by the end surface of the outlet of the exhaust pipeline and the plane where the trolley of the sintering machine is located is 45 degrees.
The system for improving the sintering process further comprises an air suction air box, wherein the air suction air box is installed below the trolley corresponding to the loose material preheating device and connected with the main sinking pipe, and a first adjusting valve is arranged on the air suction air box.
The system for improving the sintering process also comprises a fan and a dust removal device;
the fan is installed on the hot waste gas transmission pipeline, and the dust removal device is installed on the hot waste gas transmission pipeline between the hot waste gas collection device and the fan.
The system for improving the sintering process also comprises a first hot waste gas collecting pipe, a second hot waste gas collecting pipe and a second regulating valve;
the first hot exhaust gas collecting pipe is arranged on a hot exhaust gas transmission pipeline between the hot exhaust gas collecting device and the dust removing device 17;
the second hot waste gas collecting pipe is arranged on a hot waste gas transmission pipeline between the fan and the loose material preheating device;
the second regulating valve is arranged on a hot waste gas transmission pipeline between the second hot waste gas collecting pipe and the loose material preheating device.
The system for improving the sintering process also comprises an air box pipeline, a flue gas circulating pipeline, a circulating flue gas cover and a hot waste gas distribution device;
one end of the air box pipeline is connected with a sintering air box of the sintering machine, the other end of the air box pipeline is connected with the flue gas circulation pipeline, the flue gas circulation pipeline is connected with the hot waste gas transmission pipeline, and the flue gas circulation pipeline transmits the hot waste gas collected from the air box pipeline to the hot waste gas transmission pipeline;
the hot waste gas distribution device is arranged on a hot waste gas transmission pipeline, and distributes hot waste gas in the hot waste gas transmission pipeline to the loose material preheating device and the circulating flue gas hood, and the circulating flue gas hood is connected with a trolley of the sintering machine.
The hot exhaust gas distribution device comprises a first distribution pipeline, a second distribution pipeline and a third regulating valve;
one end of the first distribution pipeline and one end of the second distribution pipeline are both connected with the hot waste gas transmission pipeline, and the third regulating valve is arranged at the connecting position of the first distribution pipeline, the second distribution pipeline and the hot waste gas transmission pipeline;
the other end of the first distribution pipeline is connected with the loose material preheating device, and the other end of the second distribution pipeline is connected with the circulating flue gas hood.
On the other hand, the embodiment of the invention also provides a system for improving the sintering process, and the system for improving the sintering process comprises an air box pipeline, a flue gas circulation pipeline, a hot waste gas transmission pipeline, a hot waste gas distribution device, a circulating flue gas cover and a loose material preheating device;
one end of the air box pipeline is connected with a sintering air box of the sintering machine, the other end of the air box pipeline is connected with the flue gas circulation pipeline, and the flue gas circulation pipeline is connected with the hot waste gas transmission pipeline;
the hot waste gas distribution device is arranged on a hot waste gas transmission pipeline and distributes the hot waste gas in the hot waste gas transmission pipeline to the loose material preheating device and the circulating flue gas cover;
the circulating flue gas hood is connected with a trolley of the sintering machine;
the loose material preheating device is arranged on a rack of the sintering machine and is wrapped by the sintering mixture on a trolley of the sintering machine.
In another aspect, an embodiment of the present invention provides a method for improving a sintering process, where the method includes:
collecting hot waste gas generated in the sintering production process, wherein the hot waste gas comprises hot waste gas generated by a circular cooler and/or hot waste gas generated by a sintering machine;
the collected hot waste gas is transmitted to a loose material preheating device of the system for improving the sintering process, and the loose material preheating device is wrapped by sintering mixture on a trolley of the sintering machine;
and the loose material preheating device sprays hot waste gas into the sintering mixture to loosen and heat the sintering mixture.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the hot waste gas generated in the sintering production process is transmitted to the loose material preheating device, the loose material preheating device is wrapped by the sintering mixture, and the sintering mixture is uniformly and fully loosened and heated through the loose material preheating device, so that the temperature and the air permeability of the sintering mixture can be effectively improved, the adverse effect of an over-wet layer on sintering is reduced, and the sintering process is improved; the hot waste gas generated in the sintering process can only comprise the hot waste gas generated by the ring cooling machine, or only comprise the hot waste gas generated by the sintering machine, or simultaneously comprise the hot waste gas generated by the ring cooling machine and the sintering machine, so that the energy conservation and emission reduction are effectively realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a layout diagram of a sintering machine provided with a ring cooler according to the related art;
FIG. 2 is a layout diagram of a sintering machine provided with a system for improving the sintering process according to one embodiment of the present invention;
fig. 3 is a schematic structural diagram of a loose material preheating device provided in the first, second and third embodiments of the present invention;
FIG. 4 is a right side view of the bulk preheating apparatus provided in accordance with the first, second and third embodiments of the present invention;
FIG. 5 is a top view of an air path distribution duct and an exhaust duct according to the first, second and third embodiments of the present invention;
FIG. 6 is a schematic structural diagram of an exhaust duct according to the first, second and third embodiments of the present invention;
FIG. 7 is a layout diagram of a sintering machine provided with a system for improving the sintering process according to a second embodiment of the present invention;
fig. 8 is a layout diagram of a sintering machine provided with a system for improving a sintering process according to a third embodiment of the present invention.
Wherein,
1 sintering machine, 11 trolleys and 12 frames;
2, a mixture bin; 3, a circular roller feeder; 4, igniting the furnace; 5, a sintering machine tail sealing cover; 6, a single-roller crusher; 7, circularly cooling the steel plate; 8 a hot exhaust gas collection device; 9 a hot exhaust gas transport pipe;
10 loose material preheating devices, 101 basic fixing frames, 102 air path distribution pipelines and 103 exhaust pipelines;
13 air suction bellows; 14 a first regulating valve; 15 sintering the main dust settling pipe; 16 fans; 17 a dust removal device;
18 a first hot exhaust gas header; 19 a second hot exhaust gas header; 20 a second regulator valve; 21 bellows lines; 22 a flue gas circulation duct;
23 hot exhaust gas distribution means, 231 first distribution line, 232 second distribution line, 233 third regulating valve;
24 circulating flue gas hood; 25 sintering air boxes;
a, sintering a mixture; b, a hot air inlet; c, an outlet of the exhaust pipeline; and D, hot waste gas.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example one
In order to reduce or eliminate the adverse effect of an over-wet layer, a steam heating device is arranged on a mixture bin of a sintering machine at present, steam nozzles of the steam heating device are arranged around the mixture bin to spray hot steam to a sintering mixture, but the hot steam sprayed by the steam nozzles cannot be fully contacted with the sintering mixture, and the heating effect is not ideal; meanwhile, the over-wet layer can not be fully contacted with hot steam, so that the air permeability of the material layer is not ideal.
As shown in figure 1, in the sintering production process, a mixture bin 2, a round roller feeder 3 and an ignition furnace 4 are arranged at the head of a sintering machine 1, a sintering machine tail sealing cover 5, a single roller crusher 6 and a circular cooler 7 are arranged at the tail, the sintering mixture in the mixture bin 2 is loaded on a trolley 11 of the sintering machine 1 through the round roller feeder 3, and along with the movement of the trolley 11 towards the tail direction, the ignition furnace 4 ignites the sintering mixture, the sintering process is continuously carried out, when the sinter mixture moves to the tail of the sintering machine 1, the sinter is unloaded from the tail of the sintering machine 1, crushed by the single-roll crusher 6 and enters the circular cooler 7 for blast cooling, a large amount of hot waste gas is generated in the blast cooling process, wherein, the hot waste gas of the first section and the second section of the circular cooler 7 can be collected to carry out waste heat power generation, and the rest hot waste gas is directly discharged into the atmosphere.
As shown in fig. 2, in order to solve the problems of the prior art that the heating effect of the sinter mixture is not ideal and the air permeability is not ideal, an embodiment of the present invention provides a system for improving a sintering process, where the system for improving a sintering process includes: the hot waste gas collecting device 8, the hot waste gas transmission pipeline 9 and the loose material preheating device 10;
the hot waste gas collecting device 8 is connected with the circular cooler 7;
two ends of a hot waste gas transmission pipeline 9 are respectively connected with a hot waste gas collecting device 8 and a loose material preheating device 10, and the hot waste gas collecting device 8 collects hot waste gas generated by the circular cooler 7 and transmits the hot waste gas to the hot waste gas transmission pipeline 9;
the loose material preheating device 10 is installed on a rack of the sintering machine 1, the loose material preheating device 10 is wrapped by sintering mixture on a trolley 11 of the sintering machine 1, and the loose material preheating device 10 uses hot waste gas transmitted by the hot waste gas transmission pipeline 9 to loosen and heat the sintering mixture.
In the embodiment of the invention, the loose material preheating device 10 is installed on the frame at the head position of the sintering machine 1, when the sinter mixture is loaded on the trolley 11 through the circular roller feeder 3, the sinter mixture wraps the loose material preheating device 10, and the loose material preheating device 10 can fully and uniformly loosen and heat the sinter mixture A around the loose material preheating device.
In the embodiment of the invention, if the hot exhaust gas generated by the first section and the second section of the circular cooler 7 is used for waste heat power generation, the hot exhaust gas collecting device 8 can be connected with the rear section of the circular cooler 7 to collect the hot exhaust gas generated by the rear section of the circular cooler 7, and the position of the hot exhaust gas collecting device 8 can also be reasonably designed according to actual conditions.
In the embodiment of the present invention, the hot exhaust gas collecting device 8 may be a hot exhaust gas hood, and the hot exhaust gas generated by the circular cooler 7 may be collected in the hot exhaust gas hood.
According to the system for improving the sintering process, the hot waste gas generated by the circular cooler 7 in the sintering process is collected by using the hot waste gas collecting device 8, the hot waste gas is transmitted to the loose material preheating device 10 wrapped in the sintering mixture through the hot waste gas transmission pipeline 9, and the sintering mixture is uniformly and fully loosened and heated through the loose material preheating device 10, so that the temperature of the sintering mixture can be effectively increased, the air permeability of the sintering mixture is improved, the adverse effect of an over-wet layer on sintering is reduced, and the sintering process is improved; meanwhile, the system for improving the sintering process in the invention heats the sintering mixture by using the hot waste gas generated by the circular cooler 7, so that the hot waste gas is prevented from being directly discharged into the atmosphere, and the energy conservation and emission reduction are realized.
As shown in fig. 2, and referring to fig. 3, in an embodiment of the present invention, the loose material preheating device 10 includes: a base fixing frame 101, an air path distribution pipeline 102 and an exhaust pipeline 103;
the basic fixing frame 101 is installed on the frame 12 of the sintering machine 1;
as shown in fig. 3 and fig. 4 and 5, the air path distribution duct 102 is installed on the base fixing frame 101, the hot air inlet B is disposed in the middle of the air path distribution duct 102, at least one air outlet is further disposed on the air path distribution duct 102, and each air outlet is connected to one air outlet duct 103;
as shown in fig. 3, the sinter mix a is loaded from the mix silo 2 to the pallet 11 of the sintering machine 1 through the circular roller feeder 3 in the direction of the arrow in the figure, and an outlet C of each exhaust duct 103 is wrapped with the sinter mix a, and the outlet C is used for ejecting the hot exhaust gas D transmitted by the hot exhaust gas transmission duct 9.
In the embodiment of the present invention, the hot exhaust gas transmitted from the hot exhaust gas transmission pipeline 9 enters the air path distribution pipeline 102 through the hot air inlet B, enters the exhaust pipelines 103 through the air outlets, and is sprayed into the sinter mixture a through the outlets C of the exhaust pipelines 103; the number of the exhaust ducts 103 and the number of the exhaust ducts 103 included in each exhaust duct 103 can be designed according to the thickness of the actual material layer, as shown in fig. 4, in order to better spray the hot exhaust gas into the sintering mixture a, each two adjacent exhaust ducts 103 can be arranged in a staggered manner, so that the hot exhaust gas D sprayed from the outlet C of the exhaust duct 103 is further uniformly sprayed into the sintering mixture a, and the sintering mixture a is loosened and heated;
in the embodiment of the present invention, the hot air inlet B is disposed in the middle of the air path distribution duct 102, so that the hot exhaust gas entering each exhaust duct 103 is closer to each other, and the hot exhaust gas is distributed more uniformly, so that the hot exhaust gas can heat and loosen the sinter mixture a more uniformly.
In the embodiment of the present invention, the base fixing frame 101 may be fixed on the frame 12 of the sintering machine 1 by means of bolts, the air path distribution pipes 102 may be fixed on the base fixing frame 101 by means of bolts, each exhaust duct 103 may also be connected with the air path distribution pipes 102 by means of bolts, and each component of the loose material preheating device 10 is connected by means of bolts, so that the loose material preheating device 10 is more convenient to disassemble, assemble and repair.
As shown in fig. 6, and referring to fig. 3, the end surface of the outlet C of each exhaust duct 103 forms an angle of 45 degrees with the plane of the pallet 11 of the sintering machine 1. The purpose of such design is two: on one hand, when the sinter mixture A is loaded on the trolley 11 of the sintering machine 1 through the round roller feeder 3, due to the self weight of the material layer and the effect of air draft, the density of the bottom layer of the sinter mixture A is higher than that of the top layer, therefore, the included angle formed by the end surface of the outlet C of each exhaust pipeline 103 and the plane of the trolley 11 of the sintering machine 1 is designed to be 45 degrees, so that the hot waste gas sprayed out of the outlet C of each exhaust pipeline 103 can be in more sufficient contact with the sinter mixture A of the bottom layer, the heat exchange between the hot waste gas and the sinter mixture A of the bottom layer is more sufficient, and the sinter mixture A of the bottom layer can be better heated and loosened; on the other hand, the design can ensure that the part of each exhaust duct 103 close to the top layer of the sinter mixture A is longer than the part of each exhaust duct 103 close to the trolley 11, thereby preventing the sinter mixture A from entering the exhaust duct 103 and blocking the exhaust duct 103 when the materials are distributed.
In the embodiment of the present invention, the base fixing frame 101, the air path distribution duct 102 and the air exhaust duct 103 may be made of steel. Meanwhile, in order to prevent the abrasion of the sintering mixture A on the outer wall of the exhaust duct 103 and the adverse effect of high temperature in the sintering process on the exhaust duct 103 during the material distribution, the outer layer of each exhaust duct 103 can be coated with wear-resistant and heat-resistant metal ceramics to increase the wear resistance and heat resistance of the exhaust duct 103, and the service life of the exhaust duct 103 coated with the wear-resistant and heat-resistant metal ceramics is more than 40 times that of a common steel pipe.
In the embodiment of the present invention, an insulating layer may be disposed on the outer wall of the hot exhaust gas transmission pipeline 9, so as to reduce heat loss of the hot exhaust gas in the hot exhaust gas transmission pipeline 9, and an abrasion-resistant coating may be disposed on the inner wall of the hot exhaust gas transmission pipeline 9, so as to reduce the degree of abrasion of dust existing in the hot exhaust gas to the hot exhaust gas transmission pipeline 9, and improve the service life of the hot exhaust gas transmission pipeline 9.
As shown in fig. 2, and referring to fig. 3 and 4, in the embodiment of the present invention, a suction wind box 13 may be further provided for the system for improving the sintering process, the suction wind box 13 is installed below the trolley 11 corresponding to the loose material preheating device 10, the suction wind box 13 is connected to the main sinking pipe 15, and the suction wind box 13 is provided with a first adjusting valve 14.
On the one hand, in order to prevent the overflow of hot waste gas ejected by the loose material preheating device 10 and pollute the environment, an air suction bellows 13 can be installed below the trolley 11 corresponding to the loose material preheating device 10, and the air suction bellows 13 can introduce the overflow hot waste gas into the main dust-settling pipe 15 to enter an external discharge system and discharge the hot waste gas after being treated. The first regulating valve 14 is arranged on the air suction air box 13, so that the air suction quantity of the air suction air box 13 can be conveniently controlled; on the other hand, air suction bellows 13 also can play the bulk cargo funnel's effect, collects the sinter mixture A who scatters from platform truck 11 when being about to the cloth and introduces main dust fall pipe 15, so, can save the bulk cargo funnel of arranging originally transferring at sintering machine 1, does not occupy extra arrangement space.
As shown in fig. 2, in the embodiment of the present invention, the system for improving the sintering process may further include a blower 16 and a dust removing device 17;
the fan 16 is installed on the hot exhaust gas delivery pipe 9, and the dust removing device 17 is installed on the hot exhaust gas delivery pipe 9 between the hot exhaust gas collecting device 8 and the fan 16.
In the implementation of the invention, the fan 16 can control the variable frequency speed regulation thereof through the motor, and the air quantity of the fan 16 can be regulated according to the actual requirement, so as to ensure that the hot waste gas overcomes the pipeline resistance of the hot waste gas transmission pipeline 9 and is transmitted to the loose material preheating device 10; the dust removing device 17 can remove dust from the hot exhaust gas before the hot exhaust gas enters the fan 16, and can reduce the abrasion of the fan 16 caused by dust in the hot exhaust gas.
As shown in fig. 2, in the embodiment of the present invention, in order to better regulate the hot exhaust gas delivered to the loose material preheating device 10, a first hot exhaust gas header 18, a second hot exhaust gas header 19 and a second regulating valve 20 may be further provided for a system for improving the sintering process;
a first hot exhaust gas collecting pipe 18 is arranged on the hot exhaust gas transmission pipeline 9 between the hot exhaust gas collecting device 8 and the dust removing device 17 and is used for collecting the hot exhaust gas sucked by the hot exhaust gas collecting device 8 from the circular cooler 7;
the second hot waste gas collecting pipe 19 is arranged on the hot waste gas transmission pipeline 9 between the fan 16 and the loose material preheating device 10 and is used for collecting the hot waste gas transmitted by the fan 16 after dust removal;
the second regulating valve 20 is mounted on the hot exhaust gas transfer pipe 9 between the second hot exhaust gas collecting pipe 19 and the loose material preheating device 10, preferably at the end of the hot exhaust gas transfer pipe 9 in front of the loose material preheating device 10, and in connection with production practice, the amount of hot exhaust gas transferred to the loose material preheating device 10 can be adjusted by the second regulating valve 20, so that the system for improving the sintering process does not affect the sintering production while playing the role of loosening and heating.
According to the system for improving the sintering process, the hot waste gas generated by the circular cooler 7 in the sintering process is collected by using the hot waste gas collecting device 8, the hot waste gas is transmitted to the loose material preheating device 10 wrapped in the sintering mixture A through the hot waste gas transmission pipeline 9, the hot waste gas is uniformly and fully sprayed into the sintering mixture A through the loose material preheating device 10, the sintering mixture A is loosened and heated, the temperature of the sintering mixture A can be effectively increased, the air permeability of the sintering mixture A is improved, the adverse effect of an over-wet layer on sintering is reduced, and the sintering process is improved; the system for improving the sintering process in the invention heats the sintering mixture A by using the hot waste gas generated by the circular cooler 7, thereby avoiding directly discharging the hot waste gas into the atmosphere and realizing energy conservation and emission reduction; the system for improving the sintering process is also provided with an air suction bellows 13, so that excessive hot waste gas is prevented from directly flowing into the atmosphere, and the air suction bellows 13 can also replace a bulk material funnel without occupying extra arrangement space.
Example two
In the sintering production process, except that the cold machine of ring can produce more hot waste gas, the sintering machine also can produce more hot waste gas, can set up a plurality of sintering bellows in the below of the platform truck of sintering machine at present, every sintering bellows passes through bellows pipeline and main dust fall union coupling, and sintering bellows collects the hot waste gas that the sintering machine produced and transmits to main dust fall pipe through bellows pipeline, reentrant external discharge system.
As shown in fig. 7, the embodiment of the present invention provides a system for improving a sintering process, which includes a wind box pipe 21, a flue gas circulation pipe 22, a hot waste gas transmission pipe 9, a hot waste gas distribution device 23, a circulating flue gas hood 24 and a loose material preheating device 10;
one end of the air box pipeline 21 is connected with a sintering air box 25 of the sintering machine 1, the other end of the air box pipeline is connected with a flue gas circulating pipeline 22, the flue gas circulating pipeline 22 is connected with a hot waste gas transmission pipeline 9, and the flue gas circulating pipeline 22 transmits hot waste gas collected from the air box pipeline 21 to the hot waste gas transmission pipeline 9;
the hot waste gas distribution device 23 is arranged on the hot waste gas transmission pipeline 9, distributes the hot waste gas in the hot waste gas transmission pipeline 9 to the loose material preheating device 10 and the circulating flue gas cover 24, and the circulating flue gas cover 24 is connected with the trolley 11 of the sintering machine 1;
the loose material preheating device 10 is installed on a frame 12 of the sintering machine 1, and the loose material preheating device 10 is wrapped by the sintering mixture on a trolley 11 of the sintering machine 1.
The embodiment mainly aims at the sintering system adopting the internal circulation process of the sintering flue gas, namely the sintering system which recycles the hot waste gas generated by the sintering machine in the sintering process to the sintering production process, it is possible to select a partial sintering windbox 25, connect the windbox duct 21 of this partial sintering windbox 25 to the flue gas recirculation duct 22, so that the partial sintering bellows 25 introduces hot exhaust gases produced during sintering into the flue gas recirculation duct 22, the flue gas recirculation duct 22 in turn conveys the hot exhaust gases to the hot exhaust gas conveying duct 9, according to the actual situation, the hot waste gas distribution device 23 is adjusted to reasonably distribute the hot waste gas to the circulating flue gas hood 24 and the loose material preheating device 10, the hot waste gas distributed to the circulating flue gas hood 24 is used for providing heat for the sintering process of the sintering machine 1, and the hot waste gas distributed to the loose material preheating device 10 is used for loosening and heating the sintering mixture.
As shown in fig. 7, in the present embodiment, the hot exhaust gas distribution device 23 includes a first distribution pipe 231, a second distribution pipe 232, and a third regulation valve 233;
one end of the first distribution pipe 231 and one end of the second distribution pipe 232 are connected to the hot exhaust gas transport pipe 9, and a third regulating valve 233 is installed at the connection of the first distribution pipe 231, the second distribution pipe 232, and the hot exhaust gas transport pipe 9;
the other end of the first distribution pipe 231 is connected to the bulk preheating device 10, and the other end of the second distribution pipe 232 is connected to the circulation flue gas cover 24.
In this embodiment, the proportion of the hot exhaust gas distributed to the circulating flue gas cover 24 and the loose material preheating device 10 can be adjusted by the third adjusting valve 233 according to actual conditions, and the loose material preheating device 10 is used for loosening and heating the sintering mixture under the condition that the sintering process is ensured to be normally performed.
As shown in fig. 7 and referring to fig. 3 and 4, the loose material preheating device 10 in this embodiment is also installed on the frame 12 of the sintering machine 1 and is wrapped by the sinter mix a on the pallet 11 of the sintering machine 1, the structure of the loose material preheating device 10 is the same as that of the loose material preheating device 10 in the first embodiment, that is, the loose material preheating device 10 also includes a base fixing frame 101, an air path distribution duct 102 and an exhaust duct 103, and the connection relationship of the components is the same as that of the loose material preheating device 10 in the first embodiment, and therefore, the description thereof is not repeated in this embodiment. The hot waste gas D sprayed out from the outlet C of the exhaust duct 103 of the loose material preheating device 10 is uniformly sprayed into the sintering mixture A, and plays a role in loosening and heating the sintering mixture A.
As shown in fig. 7, a second hot exhaust gas collecting pipe 19 and a second regulating valve 20 may be provided on the first distribution pipe 231, and the second regulating valve 20 may be installed at the end of the first distribution pipe 231 in front of the loose material preheating device 10, and the amount of hot exhaust gas transferred to the loose material preheating device 10 may be adjusted by the second regulating valve 20 in connection with production practices.
As shown in fig. 7, and referring to fig. 3 and 4, in this embodiment, a suction wind box 13 may also be provided for the system for improving the sintering process, and a first regulating valve 14 is also provided on the suction wind box 13, wherein the connection relationship between the suction wind box 13 and other components is the same as that of the first embodiment, and will not be described again.
As shown in fig. 7, a fan 16 may be disposed on the hot exhaust gas transmission pipeline 9, and a dust removing device 17 may be disposed on the hot exhaust gas transmission pipeline 9 between the fan 16 and the flue gas circulation pipeline 22, wherein the specific functions of the dust removing device 17 and the fan 16 are the same as those of the dust removing device 17 and the fan 16 in the first embodiment, and the description thereof will not be repeated.
According to the system for improving the sintering process in the embodiment of the invention, hot waste gas generated by the sintering machine 1 in the sintering process is collected into the flue gas circulation pipeline 22 and is transmitted to the hot waste gas transmission pipeline 9, the hot waste gas is distributed to the sintering machine 1 and the loose material preheating device 10 wrapped by the sintering mixture A through the hot waste gas distribution device 23, the hot waste gas distributed to the sintering machine 1 is used for the sintering process again, and the loose material preheating device 10 can uniformly and fully loosen and heat the sintering mixture A by utilizing the hot waste gas, so that the temperature of the sintering mixture A can be effectively increased, the air permeability of the sintering mixture A is improved, the adverse effect of an over-wet layer on sintering is reduced, and the sintering process is improved; meanwhile, the system for improving the sintering process in the invention heats the sintering mixture A by using hot waste gas generated by the sintering machine 1, thereby saving energy.
EXAMPLE III
As shown in fig. 8, in this embodiment, the hot exhaust gas generated by the annular cooler 7 and the hot exhaust gas generated by the sintering machine 1 can be collected and distributed to the circulating flue gas hood 24 and the loose material preheating device 10 by the hot exhaust gas distribution device 23.
As shown in fig. 8 and referring to fig. 3 and 4, the loose material preheating device 10 in this embodiment is also installed on the frame 12 of the sintering machine 1 and is wrapped by the sinter mix a on the pallet 11 of the sintering machine 1, the structure of the loose material preheating device 10 is the same as that of the loose material preheating device 10 in the first embodiment, that is, the loose material preheating device 10 also includes a base fixing frame 101, an air path distribution duct 102 and an exhaust duct 103, and the connection relationship of the components is the same as that of the loose material preheating device 10 in the first embodiment, and therefore, the description thereof is not repeated in this embodiment. The hot waste gas D sprayed out from the outlet C of the exhaust duct 103 of the loose material preheating device 10 is uniformly sprayed into the sintering mixture A, and plays a role in loosening and heating the sintering mixture A.
As shown in fig. 8, a second hot exhaust gas collecting pipe 19 and a second regulating valve 20 may be provided on the first distribution pipe 231, and the second regulating valve 20 may be installed at the end of the first distribution pipe 231 in front of the loose material preheating device 10, and the amount of hot exhaust gas transferred to the loose material preheating device 10 may be adjusted by the second regulating valve 20 in connection with production practices.
As shown in fig. 8, and referring to fig. 3 and 4, in this embodiment, a suction wind box 13 may also be provided for the system for improving the sintering process, and a first regulating valve 14 is also provided on the suction wind box 13, wherein the connection relationship between the suction wind box 13 and other components is the same as that of the first embodiment, and will not be described again.
As shown in fig. 8, a fan 16 and a dust removing device 17 may also be disposed on the hot exhaust gas conveying pipeline 9, wherein the specific functions of the dust removing device 17 and the fan 16 are the same as those of the dust removing device 17 and the fan 16 in the first embodiment, and a description thereof will not be repeated.
In the present embodiment, as shown in fig. 8, the hot exhaust gas collecting device 8 transfers the hot exhaust gas collected from the circular cooler 7 to the hot exhaust gas transport duct 9, the flue gas circulation duct 22 transfers the hot exhaust gas collected from the sintering windbox 25 to the hot exhaust gas transport duct 9, the two parts of hot waste gas are dedusted by the dedusting device 17 and then are continuously transmitted forwards by the fan 16, and when the two parts of hot waste gas are transmitted to the hot waste gas distribution device 23, a part of hot waste gas can be transmitted to the first distribution pipeline 231, a part of hot waste gas is transmitted to the second distribution pipeline 232, the hot waste gas transmitted into the first distribution pipeline 231 is transmitted to the loose material preheating device 10 through reasonable regulation and control of the second hot waste gas collecting pipe 19 and the second regulating valve 20, the loose material preheating device 10 sprays the hot waste gas into the sintering mixture A, and the sintering mixture A is uniformly and sufficiently loosened and heated; the hot exhaust gases transferred into the second distribution pipe 232 are further transferred to the circulating flue gas hood 24, providing heat for the sintering process.
According to the system for improving the sintering process in the embodiment of the invention, the hot waste gas generated by the sintering machine 1 and the hot waste gas generated by the circular cooler 7 in the sintering process are transmitted to the hot waste gas transmission pipeline 9, the hot waste gas is distributed to the sintering machine 1 and the loose material preheating device 10 wrapped by the sintering mixture A through the hot waste gas distribution device 23, the hot waste gas distributed to the sintering machine 1 is reused in the sintering process, and the loose material preheating device 10 uniformly and fully loosens and heats the sintering mixture A by utilizing the hot waste gas, so that the temperature of the sintering mixture A can be effectively increased, the air permeability of the sintering mixture A is improved, the adverse effect of an over-wet layer on sintering is reduced, and the sintering process is improved; the system for improving the sintering process in the invention heats the sintering mixture A by using hot waste gas generated by the sintering machine 1 and the circular cooler 7, thereby saving energy.
Example four
The embodiment of the invention provides a method for improving a sintering process, which comprises the following steps:
step 1: collecting hot waste gas generated in the sintering production process;
step 2: the collected hot exhaust gas is transmitted to a loose material preheating device 10 of a system for improving the sintering process, and the loose material preheating device 10 is wrapped by a sintering mixture A on a trolley 11 of the sintering machine 1;
and step 3: the loose material preheating device 10 sprays hot waste gas into the sintering mixture A to loosen and heat the sintering mixture A.
In this embodiment, if the hot exhaust gas in step 1 is the hot exhaust gas generated by the circular cooler 7, the system for improving the sintering process in embodiment one may be used to heat the sintering mixture a; if the hot waste gas in the step 1 is the hot waste gas generated by the sintering machine 1, the system for improving the sintering process in the second embodiment can be used for heating the sintering mixture A; if the hot waste gas in step 1 is the hot waste gas generated by the circular cooler 7 and the hot waste gas generated by the sintering machine 1, the system for improving the sintering process in the third embodiment may be used to heat the sintering mixture a, and may be selected according to actual situations.
In the embodiment of the invention, hot waste gas generated in the sintering production process is transmitted to the loose material preheating device 10 wrapped by the sintering mixture A, and the sintering mixture A is uniformly and fully loosened and heated by the loose material preheating device 10, so that the temperature of the sintering mixture A can be effectively increased, the air permeability of the sintering mixture A is improved, the adverse effect of an over-wet layer on sintering is reduced, and the sintering process is improved; the hot waste gas generated in the sintering process can only comprise the hot waste gas generated by the circular cooler 7, or only comprise the hot waste gas generated by the sintering machine 1, or simultaneously comprise the hot waste gas generated by the circular cooler 7 and the sintering machine 1, so that energy conservation and emission reduction are realized.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A system for improving a sintering process, the system comprising: the device comprises a hot waste gas collecting device, a hot waste gas transmission pipeline and a loose material preheating device;
the hot waste gas collecting device is connected with the circular cooler;
the two ends of the hot waste gas transmission pipeline are respectively connected with a hot waste gas collecting device and a loose material preheating device, and the hot waste gas collecting device collects the hot waste gas generated by the circular cooler and transmits the hot waste gas to the hot waste gas transmission pipeline;
the loose material preheating device is arranged on a rack of the sintering machine, the loose material preheating device is wrapped by the sintering mixture on a trolley of the sintering machine, and the loose material preheating device utilizes hot waste gas transmitted by a hot waste gas transmission pipeline to loosen and heat the sintering mixture;
the pine material preheating device includes: the air duct distribution pipeline is arranged on the base fixing frame;
the basic fixing frame is arranged on a rack of the sintering machine through bolts;
the air path distribution pipeline is mounted on the foundation fixing frame through bolts, a hot air inlet is arranged in the middle of the air path distribution pipeline, a plurality of rows of air outlets are further arranged on the air path distribution pipeline, each air outlet is connected with one air exhaust pipeline, every two adjacent air exhaust pipelines are arranged in a staggered mode, and the air exhaust pipelines are connected with the air path distribution pipeline through bolts;
an outlet of each exhaust pipeline is wrapped by the sintering mixture and is used for ejecting the hot waste gas transmitted by the hot waste gas transmission pipeline, and the outer layer of each exhaust pipeline is wrapped by the wear-resistant heat-resistant metal ceramic;
an included angle formed by the end face of the outlet of each exhaust duct and the plane where the trolley of the sintering machine is located is 45 degrees, and the part of each exhaust duct, which is close to the top layer of the sintering mixture, is longer than the part of each exhaust duct, which is close to the trolley;
the system for improving the sintering process further comprises an air suction air box, wherein the air suction air box is installed below the trolley corresponding to the loose material preheating device and connected with the main sinking pipe, and a first adjusting valve is arranged on the air suction air box.
2. The system for improving a sintering process of claim 1, further comprising a fan and a dust removal device;
the fan is installed on the hot waste gas transmission pipeline, and the dust removal device is installed on the hot waste gas transmission pipeline between the hot waste gas collection device and the fan.
3. The system for improving a sintering process according to claim 2, further comprising a first hot exhaust gas header, a second hot exhaust gas header, and a second regulating valve;
the first hot waste gas collecting pipe is arranged on a hot waste gas transmission pipeline between the hot waste gas collecting device and the dust removing device;
the second hot waste gas collecting pipe is arranged on a hot waste gas transmission pipeline between the fan and the loose material preheating device;
the second regulating valve is arranged on a hot waste gas transmission pipeline between the second hot waste gas collecting pipe and the loose material preheating device.
4. The system for improving the sintering process according to claim 1, wherein the system for improving the sintering process further comprises a wind box pipeline, a flue gas circulation pipeline, a circulation flue gas hood and a hot waste gas distribution device;
one end of the air box pipeline is connected with a sintering air box of the sintering machine, the other end of the air box pipeline is connected with the flue gas circulation pipeline, the flue gas circulation pipeline is connected with the hot waste gas transmission pipeline, and the flue gas circulation pipeline transmits the hot waste gas collected from the air box pipeline to the hot waste gas transmission pipeline;
the hot waste gas distribution device is arranged on a hot waste gas transmission pipeline, and distributes hot waste gas in the hot waste gas transmission pipeline to the loose material preheating device and the circulating flue gas hood, and the circulating flue gas hood is connected with a trolley of the sintering machine.
5. The system for improving a sintering process according to claim 4, wherein the hot exhaust gas distribution device comprises a first distribution pipe, a second distribution pipe and a third regulating valve;
one end of the first distribution pipeline and one end of the second distribution pipeline are both connected with the hot waste gas transmission pipeline, and the third regulating valve is arranged at the connecting position of the first distribution pipeline, the second distribution pipeline and the hot waste gas transmission pipeline;
the other end of the first distribution pipeline is connected with the loose material preheating device, and the other end of the second distribution pipeline is connected with the circulating flue gas hood.
6. The system for improving the sintering process is characterized by comprising an air box pipeline, a flue gas circulation pipeline, a hot waste gas transmission pipeline, a hot waste gas distribution device, a circulating flue gas cover and a loose material preheating device;
one end of the air box pipeline is connected with a sintering air box of the sintering machine, the other end of the air box pipeline is connected with the flue gas circulation pipeline, and the flue gas circulation pipeline is connected with the hot waste gas transmission pipeline;
the hot waste gas distribution device is arranged on a hot waste gas transmission pipeline and distributes the hot waste gas in the hot waste gas transmission pipeline to the loose material preheating device and the circulating flue gas cover;
the circulating flue gas hood is connected with a trolley of the sintering machine;
the loose material preheating device is arranged on a rack of the sintering machine and is wrapped by a sintering mixture on a trolley of the sintering machine;
the pine material preheating device includes: the air duct distribution pipeline is arranged on the base fixing frame;
the basic fixing frame is arranged on a rack of the sintering machine through bolts;
the air path distribution pipeline is mounted on the foundation fixing frame through bolts, a hot air inlet is arranged in the middle of the air path distribution pipeline, a plurality of rows of air outlets are further arranged on the air path distribution pipeline, each air outlet is connected with one air exhaust pipeline, every two adjacent air exhaust pipelines are arranged in a staggered mode, and the air exhaust pipelines are connected with the air path distribution pipeline through bolts;
an outlet of each exhaust pipeline is wrapped by the sintering mixture and is used for ejecting the hot waste gas transmitted by the hot waste gas transmission pipeline, and the outer layer of each exhaust pipeline is wrapped by the wear-resistant heat-resistant metal ceramic;
an included angle formed by the end face of the outlet of each exhaust duct and the plane where the trolley of the sintering machine is located is 45 degrees, and the part of each exhaust duct, which is close to the top layer of the sintering mixture, is longer than the part of each exhaust duct, which is close to the trolley;
the system for improving the sintering process further comprises an air suction air box, wherein the air suction air box is installed below the trolley corresponding to the loose material preheating device and connected with the main sinking pipe, and a first adjusting valve is arranged on the air suction air box.
7. A method of improving a sintering process, the method comprising:
collecting hot waste gas generated in the sintering production process, wherein the hot waste gas comprises hot waste gas generated by a circular cooler and/or hot waste gas generated by a sintering machine;
the collected hot waste gas is transmitted to a loose material preheating device of the system for improving the sintering process, and the loose material preheating device is wrapped by sintering mixture on a trolley of the sintering machine;
the loose material preheating device sprays hot waste gas into the sintering mixture to loosen and heat the sintering mixture;
the pine material preheating device includes: the air duct distribution pipeline is arranged on the base fixing frame;
the basic fixing frame is arranged on a rack of the sintering machine through bolts;
the air path distribution pipeline is mounted on the foundation fixing frame through bolts, a hot air inlet is arranged in the middle of the air path distribution pipeline, a plurality of rows of air outlets are further arranged on the air path distribution pipeline, each air outlet is connected with one air exhaust pipeline, every two adjacent air exhaust pipelines are arranged in a staggered mode, and the air exhaust pipelines are connected with the air path distribution pipeline through bolts;
an outlet of each exhaust pipeline is wrapped by the sintering mixture and is used for ejecting the hot waste gas transmitted by the hot waste gas transmission pipeline, and the outer layer of each exhaust pipeline is wrapped by the wear-resistant heat-resistant metal ceramic;
an included angle formed by the end face of the outlet of each exhaust duct and the plane where the trolley of the sintering machine is located is 45 degrees, and the part of each exhaust duct, which is close to the top layer of the sintering mixture, is longer than the part of each exhaust duct, which is close to the trolley;
the system for improving the sintering process further comprises an air suction air box, wherein the air suction air box is installed below the trolley corresponding to the loose material preheating device and connected with the main sinking pipe, and a first adjusting valve is arranged on the air suction air box.
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| CN110616314A (en) * | 2019-10-15 | 2019-12-27 | 云南德胜钢铁有限公司 | High-temperature sintering method for schreyerite mixture |
| CN112779415A (en) * | 2020-12-25 | 2021-05-11 | 天津钢铁集团有限公司 | Device and method for improving air permeability of sintering mixture |
| CN113154884A (en) * | 2021-04-30 | 2021-07-23 | 天津铁厂有限公司 | Needle head type temperature-raising material loosening device |
| CN114107657B (en) * | 2021-10-22 | 2023-07-21 | 红河钢铁有限公司 | Preheating device and preheating sintering method for sintering mixture |
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