JPS5913652A - Cement manufacture and device utilizing blast furnace molten slag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention describes a method for producing cement 1~ using blast furnace slag as an auxiliary raw material for cement 1~ and its equipment (for those involved). be.

As is well known, a steelmaking blast furnace requires 1'1' for its operation.
A blast furnace molten slab of approximately 1/loo"C is produced. This blast furnace molten slab is conventionally used as slowly cooled slag, rapidly cooled slag, etc., and is used for various purposes such as secondary raw material for cement production. However, when it comes to actual recovery, it is currently not being utilized effectively enough other than in some areas for power generation and other purposes.

The present invention has been made in view of the above-mentioned circumstances. There are also some devices that are designed to provide equipment.

The method for manufacturing cement 1 using blast furnace molten slag of the present invention can be used from button making and blast furnaces.
L through the molten slag transfer path! The blast furnace molten slag is introduced into the cement 1 production equipment and sprayed onto the cement 1 raw materials (consisting of limestone, clay, etc.) in the preheating, calcination, or firing process of the production equipment. (The molten slag is mixed in a cement raw oven, and then the sensible heat of the molten slag is applied to the raw rice grains for preheating and calcination in the cement manufacturing process J3. It is characterized by the fact that heat J or C can be effectively used as part of the heat for firing.

2 of the present invention 1 ~ Manufacture ``A!
'+' i Installation d11 Set up a molten slag transfer path (
] At the same time, a preheater, a calcination furnace or a sintering furnace, or a cement is installed in a part of the molten slag transfer path to the cement 1. 1) Introducing ``j+'' A spray B device was installed to spray the molten soot and slag into the inside of Dow 1 to cover the interior. h1!
There is C, which is characterized by effectively utilizing the sensible heat of the heat as part of the heat for preheating, heat for calcination, or heat for firing (JruJ, -).

First, the present invention will be explained with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the bar-neck made of one piece of steel according to the present invention. In this figure, trade number 1 is the steelmaking blast furnace, and number 2 is the manufacturing equipment.

First, to explain the general configuration, the S1 force 11 normally discharges molten blast furnace slag or IJI periodically during its operation.
Since it is Rura, there is molten slag on top of it.
I 18 is installed (R^). Also, Lennon 1~J penetration (#++ 2 is [Chron preheater 38~・3c, separation] j'')'n 1, Calcining furnace 5 and []- tally kiln 6, etc. are included in the well-known structure C.

A molten slag transfer path 8 is provided between the outlet 18 of the blast furnace 10 and the bottom 6a of the rotary kiln 6.

This molten slag transfer path 8 is equipped with a molten 811 slag storage container 9 at its intermediate portion. In addition, the molten slab transfer path 8
1] - At the end of the rotary kiln 6 side, there is a spray device 10 for spraying molten slag into the rotary kiln 6.
is provided.

The molten slag transfer path 8 and the spray device 10 will be explained in more detail. The molten slag storage capacity "a9" installed in the middle part of the molten slab transfer path 8 is, for example, a hollow cylinder shaped as shown in FIG.
The wall portion 9a is a fireproof and heat insulating wall. This molten slag storage capacity? ! A 1 transfer pipe 8a extending from the discharge port of the blast furnace 1 is connected to the upper part of A9, and a second transfer pipe 8b extending to the rotary kiln 6 is connected to the lower part. Extra slag +Jl
It is connected to a discharge pipe 18 for discharging the water. These second transfer pipe line ε3 and discharge pipe line 18 are provided with dampers 19 and 20 for spacing the respective color paths.
1. (There is.; Also, - on the side wall soil part of the molten slag storage container 9, a receptacle 2'1 for detecting the molten slag storage part is installed. Based on the output of this Renri 21,
The damper 20 of the 1-1 outlet pipe 18 is opened to maintain the molten slag inside the molten slag storage unit 0 at a predetermined value f1,
]Natsu (there.

Adjust the molten slag storage unit 9 and the storage bar for high-strength molten slag in the same container 9, and then
ii Supply of blast furnace molten slag to 2 14'! and 0 degrees (
7) There is a function to perform adjustment '7'.

Further, as the spray device 10, a device as shown in Fig. 3 of the 1911 edition is used. , this ejection device neck 10 is,
When the spout 10a is opened toward the tip and a crotch section 1011 is formed in the middle section, a second transfer pipe is introduced into which the molten slag is introduced toward the crotch section 10b. 81) is connected to C. Also, this spray device F'?
11 of 10 @ On the opposite side from exit 1'110a, there is an air supply pipe 23
The air supply pipe 23 is connected to a compressor 24 at one end thereof, and a heat exchanger 25 is inserted in the middle thereof. The heat exchanger 25 includes a discharge pipe 26 branched at the middle of the first transfer pipe 8a.
and the discharge pipe 18 extending from the molten slag storage container 9 are merged and connected, and the initial outflow of molten slag discharged from the blast furnace 1 and the excess molten FAl in the molten slag storage part 'I59! Slugs are being introduced.

After the above configuration, the molten slag is quantitatively fed from the molten slag storage container 9 to the spraying device 10, and is also pressure fed from the boiler 4j24-t, and is brought into thermal contact with the high-temperature molten slag in the heat exchanger 25. Shi C Shi? Warmed air is supplied through the air supply pipe 23. and squirt l 10 ;
The high-temperature molten slab is sprayed from i to the inside of the rotary kiln 6 using air as an atomizing medium.
C3, but-(,') The raw materials for cement 1, such as lime and clay containing silica, which were input from the input neck 2ε3 into the cement manufacturing equipment described in 2, were The heat is sent to the tact 29a connecting between the 4-noise preheater 3a, the 2nd re-heater 31, and the 11-inch heater 31+which is transported through the airflow of the high-quality product C1; heat ft-:). It is introduced into the first Lee ICron preheater 3a. This first → Noik]
=1 N preheater 3aC The raw material is separated from the high temperature gas and sent to the second heater 1 in the same way as the second and J3 reheater 3b.
, 3c, heated to Y, and calcined), 7I! Sent to 11. In the calcining furnace 5, fuel such as 11 heavy oil (J) and charcoal is burned in the burnout 5a to preheat and calcinate the cement 1 raw material.After calcining, the raw material is transferred to the cement 1. Separation 1 is sent to Italy + 1 to 4, and divided into volumes (Ll - sent to the bottom 6C of Tally kiln 6. Also, high) crystal gas (Tari 1 to 29 J] -290 Through the Reikron preheater 3 a, 3C, j su 1, cement field o 1
On the other hand, the initial outflow of the molten slag discharged from the blast furnace 1 passes through the Jul outlet port/channel 26 and the heat exchanger 25 due to its low temperature. The molten slag at a temperature of 1Q is guided into the molten slag storage container 9. A part of the molten slag is stored inside this molten slag storage container 9, and
A predetermined amount is suspended by a damper 19 and sent to the spray device 10. High-temperature, high-pressure air is used as a spraying medium from the mist device 10 and is sprayed and mixed onto the 1 quintillion-sized receipt inside the rotary 6. Spray device 10
The molten slag sprayed from the molten slag is mixed with the cement raw material, and then the molten slag is given to the raw material to the heat sink 1 (used as part of the heat for sintering). In addition, the molten slab is sprayed on the raw materials 1 to 1 in the vicinity of the entrance of the rotary kiln 6, but in the rotary kiln 6, the raw material is in powder form, The surface of layer 31 is constantly stirred and renewed as the rotary kiln (3) rotates, thereby preventing re-fusion between slag particles due to J! Ifi of the sprayed molten slag. The mixed resin 1-raw material 31 and blast furnace slag are fired (forming cement liqueur) and sent to the coal cooler 30.

On the other hand, there is a sentry 'i'A'J1 in []-] Tally 21 run 6.
(The injected air is passed through the high-temperature secondary air to the firing furnace 6 and the calcining furnace! According to J, the method and apparatus for producing eel cement, blast furnace slag, which had previously been used in the form of slowly cooled slag, rapidly cooled slag, etc., as a sub-rudder o'+1 in the production of cement i, is molten at a high temperature. Since the cement was sprayed and mixed with JUI, the molten metal discharged from the blast furnace (1 slag of 1 molten metal, 1 mol of fi5, In addition, with the obvious recovery of the molten slag mentioned above, the fuel consumption of manufacturing equipment is reduced by 11, and the cost is reduced by 1 to 1. In the past, the molten slab was sprayed, atomized, and evenly mixed with C cement 1-1'l. 4'+'l
'l (1) III Lower 'The cement clinker's 11th grade f'l and the negative impact on the equipment v1
Prevent Wisdom from J
〜NAlkori 100・C was suppressed to 150kCI+! 'L force 1 slag addition amount, Mondori bolt non 1 ~
In the case of lemento, the weight should be 340-350 kg.

According to the essence of the present invention, when molten blast furnace slag 1 per 11 hectares of cement is charged into the kiln at a rate of 3/lo to 350 kg, the unit of limestone decreases as the amount of molten slag increases, in other words, 1ri rice grains Taking into account the reduction in heat stamp required for decomposition, the molten slag) from 411 degrees to 140 degrees
At 0° C., it is possible to reduce the firing heat by about 140 kilocalories per 1 kc+ of cement, or about 120 kcal by 1200"Cc.

Further, FIG. 4 is a diagram without showing another embodiment of the neck of the stub-manufacturing tool of the present invention. In this figure, components that are the same as those in FIG.

The cement manufacturing apparatus shown in FIG. 4 is different from the one shown in FIG.
This point is installed in the middle of the duct 32 that connects the calcining furnace 5 with the duct 32.

Meanwhile, as shown in FIG. 55, the ducts 32 connected to the lower part of the calcining furnace 5 are connected to the raw water 1 shows 1 to 33 for introducing cement 1-ore from the Reikron preheater 3C. At the same time, the original o'31 of the duct 32]-h 33
The injection fIi device 31 is installed between the 1-1 part 33a and the calcining furnace (5).

-1- 474 composition a3 (, DJjΔ”l > r
i 433 as a light (1 million yen of heat input into the tact 32; 1 is sent from the clinker cooler 30) It
It is sent toward the inside of the calcining furnace 5 while acting as C or J in the 5 streams. Then, molten slag is sprayed and mixed in a ++15 fogging device 31 into the cement raw material 1, and the sensible heat of the molten slag rises.
-13i! The mixture is fed into the inside of the incinerator 5, where it is stirred and mixed by turbulent flow and passed through the bar t5.
Sly fired by i+, then C[-1-Tally-1:
It is sent to Run 6 and fired.

-1, If the J of the above is used in the eel heat production equipment, the sensible heat of the molten slag or the duct 32 in the front stage of the calcining furnace 5 will cause the heat of the molten slag to be heated. It is important to try to reduce Noriro Netsu if. The mixture of raw material, cement, and raw material introduced into the 11-tally kiln 6 is completely mixed in the turbulent flow inside the calciner 5, so that the mixture is not evenly mixed. II [Kakataka, [1-Tally kiln 6 firing staff 11 are facing] - Tsuru.

In addition, the cement production equipment 7 shown in FIG.
33 and the arrangement structure of the spray device 31 can also be referred to as a structure similar to that shown in FIG. 6 or 7. As shown in FIG. 6, the spraying device 31 is attached to the base of the shoe I-33, which is fixed to the duct 1-32 at an angle to the duct 1-32.
The two spout ports 31a are provided facing the inside of the tactile chamber 32. In addition, the structure shown in FIG.
A spray device 31 is installed coaxially near the base inside the transportation pipe (raw material shoe 1-) 33, and its 1ltl f and HIJ 31a are directed toward the inside of the toughs 1 to 32. It was revised by

In the receiving structure shown in Fig. 6, there is a direction IJ in Doug 1 to 32.
The molten slag sprayed by
The slab particles collide with the flowing raw material J'lR and undergo heat exchange1.At this time, the slab particles stall and collisions occur between the particles, but if the temperature is above 900℃, fusion will not occur. There's no danger of it happening. In addition, some fusion occurs and other raw material particles also adhere to the surface of the molten slag particles that have collided with the raw material layer (=J - C), so the raw material composition becomes uniform and the inside of C-Cree 1 Run 6 r ff111 firing 11 there is no such thing.

In addition, the structure shown in Fig. 7 is shown in Figure 7.
3, ffi j) (r, + '=9 (
J) I=ment II', io'31c, spray device ν
Guided around i3'l, 11 (°Kogiri Station f!!'!”
The molten slag sprayed from 331 is mixed quickly and efficiently in the air stream, and then introduced into the tact 32.

If J-3 has a structure like these, it is possible to increase the mixing efficiency with molten slag such as cement raw material, and it is possible to increase the mixing efficiency with J-3 in the firing furnace.
It is impossible to impair the firing properties.

In addition, in the above embodiment, C is cement +-D; t J: l in jl! (,
! 'IA,) 12 examples (I have explained the roughness, but these 41. are not limited to the real part 1 example, but are not limited to the preheater or separation leak [J&C Remen 1 to 18; [E; )I4
It fits Δ, sea urchin C and J.

71<
A; J, and the equipment is molten slag 01
l; A molten slab transfer path is installed between the IJ and the cement manufacturing equipment. The molten slag conveyed through the molten slag transfer path is sprayed and mixed with the cement material by the 1rj atomizer to the duct 1 in the previous stage of the duct 1. Rudder O'; 1 and C were used (melted slag was 11
The sensible heat is brought into the molten state C cement (-manufacturing) during the process, and the sensible heat is used as part of the heat for preheating, heat for calcination, or heat for firing. It is possible to effectively utilize the input thermal energy of blast furnace molten slag, reduce the amount of heat required for cement manufacturing equipment, and increase the amount of fuel required. In addition, it is possible to reduce the amount of C cement jaw construction. By spraying and mixing with Fl, cement 1-1-15 in the previous stage of the calcining furnace:
Since the 81 and the slag are sufficiently mixed and homogenized, the slag can be fired more easily inside the firing furnace.

[Brief explanation of the drawing]

Figure 1 shows an example of the hot light I18 configuration diagram;
Figure 2 shows an example of a container suitable for storing molten slurry. Figure 13 shows an example of a spraying device. Figure 4 shows another embodiment of the present invention. (1((schematic configuration diagram,
Figure 2 is a cross-sectional view of an example of the structure of the installation part i of the 11C) pole device r, manufactured by Cement 1~, and Figures 0 and 7 are other examples of the same structure. /J'%
1゜1... Steelmaking blast furnace, 1a... Molten 81 (slag extraction L1.2... Cement j6 equipment, 5)... Temporary force 1.1 furnace, 6...
Calcining furnace (rotary kiln), E3... Molten slag transfer path, ε3a... First transfer pipe, 81
)... Second transfer pipe line, 9... Molten slag storage container, 10.31... Spraying device, 10
a, 31a...110 out 1', I, -19,
20...Tampa, 23...Air supply? 2.
24...-1 Nzoretsuri-12)...
・Heat exchanger, 32...Guku 1-133...
・・Raw material +-1-a Figure 5 Figure 6

Claims (1)

[Claims] 1. The blast furnace molten slag discharged from the iron-making blast furnace is guided to the cement I-'In production equipment through the molten slab transfer path, and the blast furnace molten slag is installed in the cement I-In production facility! tf
In the preheating step, calcination 1 culm or firing step of i, quantitatively spray and mix on Umen 1 to raw N'il, and add the blast furnace melt t, 6i
Cement l~ using blast furnace molten slag, characterized in that sensible heat of the slag is imparted to the cement l~ raw material
manufacturing method. 2. The molten slab transfer path is provided with a molten slab storage container in the middle part, and a predetermined amount of lead from the back of the blast furnace molten slag introduced into the molten slag storage container is guided to the manufacturing equipment, and the remainder is A process for producing cement using blast furnace molten slag according to claim 1. 3. The method for producing hymento using blast furnace molten slag according to claim 1 or 2, wherein the firing step is performed in a rotary kiln, and the blast furnace molten slag is sprayed into the rotary kiln. 4. The first stage of calcination is carried out in an airflow furnace type calcination furnace, and the blast furnace molten slag is sprayed inside the calcination furnace or into a duct 1 near the entrance of the calcination furnace. A method for producing cement 1- using the blast furnace molten slag described in item 1 or 2. 5. A molten slag transfer path is provided between the molten slab outlet of the steelmaking blast furnace and the cement manufacturing equipment, and a preheater and calciner of the cement production equipment are installed at one end of this molten slag transfer path. Or a spray for quantitatively spraying the blast furnace molten slag into the inside of the firing furnace or the inside of the duct that introduces cement to raw stone into the preheater, calcining furnace, or firing furnace! A device for manufacturing cement 1- using blast furnace molten slag, which is equipped with A-place. 6. The molten slag transfer path has a molten slag storage container in the middle part. 7. The firing furnace is located in the Ll-tally kiln, and the mouth and outlet of the spraying device are directed toward the inside of the tally kiln. ,-Runo^'11iI
'l Desired Range Item 5) or: is an apparatus for producing cement 1- using the blast furnace molten slag described in Item 6. 8. The calcining furnace is an airflow furnace type calcining furnace, and the calcination furnace described in 11.
For the ejection of the r1 mist device, Ll is installed inside the pre-calciner 31 or inside the gutter for introducing the cement raw material into the same sheet calciner. J R'l”=
Cement using the blast furnace molten slag described in the range 5 Jj'j or item 6! ~ manufacturing equipment.