EP0047509A2 - Procédé de séchage, respectivement préchauffage de charbon en utilisant des charbons maigre ou peu gras - Google Patents
Procédé de séchage, respectivement préchauffage de charbon en utilisant des charbons maigre ou peu gras Download PDFInfo
- Publication number
- EP0047509A2 EP0047509A2 EP81106956A EP81106956A EP0047509A2 EP 0047509 A2 EP0047509 A2 EP 0047509A2 EP 81106956 A EP81106956 A EP 81106956A EP 81106956 A EP81106956 A EP 81106956A EP 0047509 A2 EP0047509 A2 EP 0047509A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- coal
- dried
- circuit
- drying
- water vapor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
Definitions
- the invention relates to a method for drying or preheating coal or coal mixtures and subsequent coking using non-or only weakly baking hard coal and / or carbon carriers, the coal preferably being up to 95% below a grain size before being introduced into the coke oven 3mm and about 50% ground to a grain size of less than 0.5mm, dried or preheated to a final temperature of 110 to 250 ° C, mixed with a mineral oil and / or coal-based binder and compacted.
- the device shown at the same time for producing such blast furnace coke is equipped with a grinding device, a drying device, a feed device for the binder and a compression device and the downstream coke oven.
- the method and device can also be used using or using coking coal.
- DE-AS 25 55 431 shows a method of the type mentioned at the outset, which, however, works in bulk operation, ie the pre-dried and preheated coal is poured into the coke battery or its individual coke ovens by pouring.
- the coal used is compressed by a briquetting process using a briquette press with pre-pressing device.
- the briquettes are placed in the filling containers of the coke oven filling car and sometimes break when they are poured into the oven chambers.
- a disadvantage here is the relatively low compression of the coal in relation to the furnace volume.
- An entrained-flow dryer is used for drying and preheating the coal used, the disadvantages of which can be seen in the high investment and operating costs.
- the entrained flow dryer is operated with an inert gas of nitrogen, carbon dioxide and their mixtures with and without water vapor.
- Such inert gas is freshly generated, for example, by burning coal, oil or gas. Since water is introduced through the moist coal, which turns into water vapor during drying, this water vapor is discharged with excess inert gas.
- the known method is not harmless from a safety point of view, because the simultaneous presence of oxygen, Co and coal poses the risk of food waste.
- Another disadvantage is that the dried and previously heated coal after separation and removal from the circuit of the entrained flow dryer comes under the influence of atmospheric air with a corresponding oxygen content, so that here in the area of the precompression devices of the briquetting press there are signs of oxidation on the surface of the coal grains which occur the quality of that in this way generated coke are detrimental.
- the weak caking substitute mixtures affected can easily be attacked or destroyed by the presence or the admission of oxygen at the prevailing temperatures.
- the water introduced by the water content of the moist coal or the water vapor resulting from it during drying of the coal is also not used here for the formation and stabilization of the inert gas, but the amount of water extracted from the carbons during predrying is used as the amount of steam in the receiver and / or added to the coke oven gas in the suction line of the gas blower to compensate for the disadvantages on the gas side.
- the invention has for its object to further develop a method of the type described above and to show a device suitable for carrying out the method which or in which the access of oxygen, that is to say the oxidation of the coal grain during drying and the subsequent handling until use in the coke oven is essentially prevented.
- this is achieved in that the ground coal is inertly dried or preheated inertly with water vapor originating from the coal to be dried, in the presence of the water vapor with the purpose of largely avoiding an oxidation process in direct contact
- Binder is encased and finally compacted in a manner known per se to a cake with a density of at least about 1.0 kg / dm 3 (based on anhydrous substance).
- the invention is based on the idea of effectively protecting the coal against oxidation of the coal grain not only during the drying and preheating, but all the way to the coke oven, and in this connection taking a combination of measures which differ in various respects have an advantageous effect and support each other.
- water vapor as an inert gas, which originates from the coal to be dried itself, is advantageous in that the introduction of water cannot be avoided during the drying of moist coal, and this water vapor therefore arises anyway. Instead of removing it from the circuit, as is known in the prior art, it forms the circuit of the inert gas and is only removed in excess.
- the preheated carbon bodies are coated with a binder in the presence of the water vapor, so that the coated coal can then be removed from the water vapor atmosphere and the binder itself provides protection against oxidation. The binder then serves at the same time for the firm cohesion of the mashed cake required for handling when it is inserted into the coke oven chamber.
- the mass concentration reached during pounding is essential for the stability of the cake. Since damp coal is usually mashed, in which the water is the binder, in the present process, since the water is absent, a mineral oil or carbon-based binder must be added. It has been shown that an anhydrous, bound coal mixture can be compressed to a greater extent than moist coal with the same tamping energy.
- the high tamped weight is not only advantageous for handling the cake, but also for improving your own create the coke produced or for the fact that a relatively higher proportion of hard coal or only weakly baking can be used for the production of high-quality coke.
- the high specific tamped weight improves the characteristics of the coke that describe the abrasion and the piece strength.
- the steam coming from the coal to be dried is conducted in a circuit over the coal to be dried or preheated, which is heated at one point in each case directly. This ensures that an exhaust gas from a burner or the like does not enter the circuit as the inert gas. High energy densities are easily possible in the cycle at a relatively low speed and therefore gentle treatment of the coal.
- the water vapor circuit is kept under a controlled excess pressure, which can be around 20 to 40 mbar at the end of the preheating. This creates a preheat in a manner that is safe from a safety point of view, which is also inexpensive and works in a manner that is gentle on the coal.
- the circuit of the water vapor q can expediently be conducted in cocurrent over the coal to be dried or preheated in order to achieve a gentle treatment of the coal. It has been shown that when the coal is dried in a driven drying drum by the direct current of the media, by favorable dwell time and fine distribution of the coal with the aid of trickle internals in the drying drum, such a good heat transfer is achieved that the temperature difference between the heating medium and water vapor the coal at the outlet of the drying drum is only about 10 ° C. Overheating phenomena, which could lead to a loss in quality of the coke, are thus avoided.
- the indirect heating of the inert gas circuit can be carried out by any fuel or exhaust gas at a high temperature level, but preferably by the hot circuit gases of a coke dry cooling system.
- the device for producing blast furnace coke from coking coal or blends with the use of hard coal that does not bake or only weakly bakes is equipped with a coal preparation device, in particular a grinding device, a drying device, a feed device for the binder and a compression device, as well as the downstream coke oven.
- a coal preparation device in particular a grinding device, a drying device, a feed device for the binder and a compression device, as well as the downstream coke oven.
- the drying device a driven in direct current to the I nertgas Vietnamese introducsburg of water vapor attached drying drum, the inert gas circuit in a pre-separator and cooler as well as a dedusting means downstream.
- the inert gas circuit has a lockable supply line for water or steam and a further lockable supply line for air.
- the compression device is designed as a ramming device or as another compacting device for producing a manageable compacted body from preheated coal.
- the coal is gently dried, which also has a favorable effect on the subsequent coke production. Overheating phenomena and high speeds of the coal are avoided, which prevents grain breakdown and minimizes dust accumulation. Wear of the device parts only occurs to a comparatively small extent. Fire-resistant lining of the drying device is avoided.
- the temperature profiles are also easier and more controllable than with entrained-flow dryers.
- the dedusting device can be designed as a cloth filter dedusting because the temperature control allows this.
- the lockable supply line for water or steam serves for the start-up process, while the further lockable supply line for air is required when the system is switched off.
- the inert gas circuit has two short-circuit lines each provided with controllable shut-off elements, one of which is connected between a heat exchanger and the drying drum and into the line between the drying drum and the pre-separator and cooler leads, while the other branches off after the dedusting device and after the downstream fan and in front of the heat exchanger and bridges the heat exchanger. While the first short-circuit line is used to increase the temperature in the cloth filter dedusting, the second short-circuit line serves to lower the temperature in the cloth filter dedusting. It is understood that in this way the cloth filter dedusting can be carried out in an optimal temperature range, so that the temperature falls below the dew point and the condensation of water is avoided.
- the upstream pre-separator and cooler can also be used to lower the temperature in the cloth filter dedusting.
- the cooling device on the pre-separator expediently consists of several fans which can be switched on or off accordingly. It is understood that other dedusting devices can also be used.
- the partial circuit of the inert gas circuit intended to protect the dried coal branches off after the fan and is fed back into the inert gas circuit - bridging the drying drum - between the latter and the pre-separator and cooler.
- the dried and pre-heated coal is effectively protected from the entry of atmospheric oxygen even after leaving the drying drum until it has been coated with the binder, which in turn takes over the protective function and enables the coal in the coal tower and in the subsequent ramming device can be handled without the risk of the carbon grains being oxidized.
- the system also has a pre-separator and sensor 5, and downstream of this a dedusting device 6, which is expediently designed as a cloth filter dedusting. Downstream is a fan 7 for circulating the heat transfer medium or. of the inert gas circuit and the partial circuit.
- a heat exchanger 8 is used for indirect heating of the inert gas circuit.
- the heat exchanger 8, on the other hand, is connected to a heating circuit 9, which ultimately leads to the exhaust stack 10 and has an exhaust gas recirculation 11.
- a mixed gas fan 12 and a controllable Abspenorgan 13 is arranged.
- a burner 14 is heated with gas or another medium which is drawn off via a line or a storage tank 15.
- the combustion Air for the burner 14 is supplied via an air fan 16.
- the exhaust gases can be returned via the return line 11 after passing through the heat exchanger 8 and mixed in a mixing chamber 19 with the combustion emissions.
- the inert gas circuit leads with a line 18 from the heat exchanger 8 to the entrance to the drying drum 4. After passing through the drying drum 4 in direct current, the inert gas circuit is completed by the line sections 19, 20, 21, 22 and 23. As can be seen, the line piece 19 is connected between the output of the drying drum 4 and the input of the pre-separator and cooler 5, which is blown with cooling air by a blower (not shown) according to the arrows 24 and thus the temperature of the inert gas can be reduced.
- the line section 20 connects the outlet of the pre-separator and cooler 5 to the dedusting device 6; the output of which is connected to the blower 7 via the line piece 21.
- the line section 22 leads to a controllable shut-off device 25, from which the line section 23 leads to the heat exchanger 8.
- the inert gas circuit 18 to 23 is formed from the line 18 and the line sections 19, 20, 21, 22, 23.
- two short-circuit lines 26 and 27 are provided, in which controllable shut-off devices 28 and 29 are arranged.
- a feed line 30 for water or steam At the entrance to the drying drum 4 there is a feed line 30 for water or steam and a control device 31 which is required for start-up purposes.
- the coal is gently dried and preheated in the driven rotating drying drum 4, with rapid heating first taking place by condensing steam on the still cold coal. Later, a gentle and relatively precise temperature increase can be achieved by evaporating the water. It is easily possible to make the plant so that at the end of the drying drum 4 there is only a temperature difference of about 10 ° C between the water vapor and the preheated coal.
- the dried coal passes from the outlet of the drying drum via an encapsulated conveying device 34 into a bucket elevator 35 and from there into an intermediate silo 36, from which it can be transferred in batches to a weighing device 37. The coal then remains in the mixer 38.
- the dried coal is coated or coated with a binder.
- This is fed from a binder tank 40 into the mixer 38 via an injection device 41.
- the binder tank 40 is kept at the desired preprocessing temperature by a thermal oil heating unit 42.
- the applied binder not only serves to bind dust, but also at the same time to improve the cohesion of the coal in the ramming device, so that then a manageable cake is created.
- the access of oxygen to the coal grain during further processing is prevented or further processing is possible without, for example, the ramming device having to be placed under inert gas.
- the partial circuit 43 to 47 formed from the line sections 43 to 47 branches off from the line section 22. This partial circuit 43 to 47 of the inert gas protects the dried coal and the relevant parts of the plant, over which it is passed.
- the short-circuit line 24 branches off from the line piece 23, but also the inert gas outlet line 48, in which the adjustable pressure relief valve 49 is provided and which ultimately leads to the exhaust stack 10.
- An overpressure is always maintained in the inert gas circuit 18 to 23 and in the partial circuit 43 to 47 via this pressure relief valve 49, which pressure can be, for example, 20 to 40 mbar at the outlet of the drying drum 4.
- steam is continuously released to the exhaust gas stack 10 via the pressure relief valve 49 both during the start-up phase and during the operation of the system, because water vapor is continuously enriched by the water introduced or by the water carried in by the coal.
- the pre-separator and cooler 5 and the dedusting device 6 are connected to the bucket elevator 35 by means of screw conveyors 50, so that the dry coal separated in the pre-separator and cooler 5 and the dedusting device 6 is added again to the dried coal supplied via the conveying line 34.
- the fan 7, the drying drum 4 and various other system parts are started.
- the heating circuit 9 is then released by igniting the burner 14 for the development of heat, the associated system parts such as air fan 16 and mixed gas fan 12 also having to be switched on.
- Heat is transferred to the circuit filled with air via the heat exchanger 6.
- water is sprayed into the drying drum 4 by the control device 31 for water via the feed line 30. The water evaporates through the hot inlet gases. The resulting steam increases the amount of vapors in circulation.
- the controllable overpressure valve 49 When the above-mentioned overpressure on the drying drum is reached, the controllable overpressure valve 49 is set in the open state so that it can discharge a partial gas flow into the exhaust gas chimney 10.
- the amount of water supplied is measured so that the water vapor produced is sufficient to reduce the oxygen content in the circulating vapors below 2%, preferably below 1%.
- this opening process takes about 15 minutes.
- drying of the coal can be started by switching on the material conveyor 2 and removing moist, ground coal from the material silo 1 and feeding it to the drying drum 4 via the rotary feeder 3. It is understood that water is no longer introduced via the feed line 30 at this time.
- the damp coal to be dried reaches the material silo 1 in some way via a grinding device (not shown).
- the material conveyor 2 is equipped with a direct current control drive.
- the amount dispensed can be volumetric by hand be measured or set manually from a control center.
- the amount of coal to be dried should be kept constant during operation.
- the interior of the drying drum 4 is largely airtight against the environment. Above all, no atmospheric oxygen can penetrate, since the inert gas circuit 18 to 23 has the above-mentioned overpressure at the sealing points of the drying drum 4.
- the temperature of the dried coal present at the end of the drying drum 4 is specified as a setpoint and is matched to the coking process. When the value falls below the setpoint, the shut-off device 25 on the pressure side of the ventral gate 7 is opened so that the amount of vapors in the inert gas circuit 18 to 23 is increased. If the temperature of the coal at the outlet of the drying drum 4 falls below the target value, the amount of vapors is reduced by the control device described above.
- the entry temperature of the hot vapors into the drying drum 4 should be about 450 ° C. If the value falls below this target value, the gas supply to the burner 14 is increased. By introducing more energy, the exhaust gas temperature of the heating circuit 9 rises, so that the temperature of the inert gas circuit 18 to 23 is also raised via the heat exchanger 8. When the setpoint of the temperature of the heating circuit 9 is exceeded at the entrance to the heat exchanger, which is approximately 1100 ° C., the shut-off device 13 in the heating circuit 9 is opened. As a result, an increased recirculation of the exhaust gas mixture is initiated, whereby the exhaust gas temperature in the mixing chamber 17 is reduced to the desired value.
- the vapors or the inert gas circuit are cleaned with the dedusting device 6 and the upstream, indirectly working pre-separator and cooler 5.
- the dried and preheated coal present at the end of the drying drum 4 is conveyed into the intermediate silo 36 via the conveying device 34 and via a bucket elevator 35.
- the coal which is also dry and separated in the pre-separator 5 and in the dedusting device 6, is fed to the bucket elevator 35 via the conveyor screws 50.
- the coal is removed from the intermediate silo 36 by means of cellular wheel locks and fed to the weighing device 37. When the prescribed weight is reached, the cellular wheel locks are switched off and the coal is introduced into the mixer 38.
- the mixer 38 is filled with coal, the binder is injected into the mixer 38 by the injection device 41.
- the mixer opens and the dried, heated and coated material, namely the coal, reaches the coal tower 53 by means of a screw conveyor 52.
- the coating with the binder provides protection against this during the further processing of the dried preheated coal the entry of atmospheric oxygen.
- the coal arrives in batches from the coal tower 53 into the ramming machine 54, where it is compacted into a solid cake by tamping.
- the compression or the specific tamped weight is at least about 1.0 kg / dm 3 (based on anhydrous substance).
- a higher compression works in an improvement in the properties of the coke produced or in the possibility of using non-or only weakly baking hard coal in higher proportions.
- the pounded cake is then inserted from the ramming device 54 into the coke oven 55 or in each case into the individual coke oven chamber, so that the volatile constituents of the coal can be extracted and the coke produced; the introduction of the mashed coal in the form of a cake into the coke oven 55 is advantageous in that the dust formation which is usual when using a dumping operation is avoided.
- the heat transfer in the pressed cake is much better than in a loosely poured pile.
- the material conveyor 2 is first stopped. Since the drying drum 4 no longer consumes as much heat, the temperature of the dry coal at the outlet of the drying drum 4 rises. Likewise, the temperature of the inert gas in line piece 19 also rises. Water is now entered into drying drum 4 via control device 31 for water. Even now, atmospheric oxygen is prevented from entering the system. After the mixing of the coal in the mixer 38 has ended, the water supply to the drying drum 4 is switched off and the air supply via the second supply line 32 is made possible by opening the shut-off device 33. The amount of vapors circulating increases by sucking in air. Exhaust gas is continuously released into the exhaust stack 10 via the opened pressure relief valve 49. The proportion of water vapor is now constantly decreasing, while the proportion of air is increasing.
- the feed mixture considered shows only about 20% good-baking coals, while the rest is weak or non-baking. This is reflected in the key figures of the mixture:
- the following table shows the grain size> 40mm, the amount of grit> 10mm and the mechanical coke qualities Micum 40, Micum 10, Irsid 20 and Irsid 10 for the three process variants. It can be seen that the chosen very weak-baking mixture (low puff number, small dilatation) can only produce a usable coke if the proposed method "preheating, binding, pounding" is used.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Drying Of Solid Materials (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT81106956T ATE11303T1 (de) | 1980-09-05 | 1981-09-04 | Verfahren zur trocknung bzw. vorerhitzung von kohle unter verwendung nicht oder nur schwachbackender steinkohlen. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3033461A DE3033461C2 (de) | 1980-09-05 | 1980-09-05 | Verfahren zur Trocknung und Vorerhitzung von feinfkörniger Steinkohle unter Verwendung nicht oder nur schwach backender Kohle und/oder Kohlenstoffträgern |
| DE3033461 | 1980-09-05 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0047509A2 true EP0047509A2 (fr) | 1982-03-17 |
| EP0047509A3 EP0047509A3 (en) | 1982-04-21 |
| EP0047509B1 EP0047509B1 (fr) | 1985-01-16 |
Family
ID=6111212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81106956A Expired EP0047509B1 (fr) | 1980-09-05 | 1981-09-04 | Procédé de séchage, respectivement préchauffage de charbon en utilisant des charbons maigre ou peu gras |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0047509B1 (fr) |
| AT (1) | ATE11303T1 (fr) |
| DE (1) | DE3033461C2 (fr) |
| DK (1) | DK161712C (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0370144A1 (fr) * | 1987-09-03 | 1990-05-30 | Kawasaki Jukogyo Kabushiki Kaisha | Procédé de régulation de l'humidité du charbon |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1187584B (de) * | 1954-07-30 | 1965-02-25 | Steinmueller Gmbh L & C | Verfahren zur Vortrocknung von Kohle |
| DE2211372C3 (de) * | 1972-03-09 | 1980-10-02 | Rheinische Braunkohlenwerke Ag, 5000 Koeln | Verfahren zur Herstellung von Formkoks aus Braunkohle |
| US3793743A (en) * | 1972-08-23 | 1974-02-26 | Waagner Biro American | Apparatus for drying coal |
| DE2434827A1 (de) * | 1973-08-06 | 1975-02-27 | Waagner Biro Ag | Verfahren zur energierueckgewinnung bei gaserzeugungsprozessen |
| DE2415758A1 (de) * | 1974-04-01 | 1976-02-26 | Buettner Schilde Haas Ag | Anlage zur kohletrocknung und vorerhitzung |
| DE2435500A1 (de) * | 1974-07-24 | 1976-02-12 | Hugo Dr Ing Schaefer | Verfahren zur vorerhitzung von kokskohle unter benutzung von ueberhitztem abhitzedampf, der in einer trockenkokskuehlanlage in besonderer weise erzeugt wird |
| US4008042A (en) * | 1974-08-16 | 1977-02-15 | Coaltek Associates | Coal heating temperature control |
| DE2555431B2 (de) * | 1975-12-10 | 1978-12-21 | Fa. Carl Still, 4350 Recklinghausen | Verfahren zur Herstellung von Hochofenkoks |
| DE2626653C3 (de) * | 1976-06-15 | 1982-01-07 | Bergwerksverband Gmbh | Verfahren und Vorrichtung zum Trocknen und Vorerhitzen von Kokskohle |
| DE2633789C3 (de) * | 1976-07-28 | 1980-08-14 | Wintershall Ag, 3100 Celle | Verfahren und Vorrichtung zur Herstellung von Petrolkokskalzinat |
| DE2659335C2 (de) * | 1976-12-29 | 1985-10-24 | Bergwerksverband Gmbh | Betrieb einer Kohleerhitzungsanlage |
| DE2719189C2 (de) * | 1977-04-29 | 1984-07-19 | Carl Still Gmbh & Co Kg, 4350 Recklinghausen | Verfahren zum Betrieb einer Kohlevortrocknungs- bzw. -erhitzungsanlage in Verbindung mit einer Kokerei |
| DE2748423A1 (de) * | 1977-10-28 | 1979-05-03 | Bergwerksverband Gmbh | Verfahren zur inertisierung von kohleerhitzungsanlagen |
| DE2810694C2 (de) * | 1978-03-11 | 1985-06-27 | Alfelder Eisenwerke Carl Heise, KG vorm. Otto Wesselmann & Cie., 3220 Alfeld | "Verfahren zur Vortrocknung von feinkörniger Steinkohle und zur Weiterverarbeitung zu hochwertigem Steinkohlenkoks" |
| DE2949720C2 (de) * | 1979-12-11 | 1982-08-26 | Alfelder Eisenwerke Carl Heise, KG vorm. Otto Wesselmann & Cie., 3220 Alfeld | Verfahren und Vorrichtung zum Trocknen und Erhitzen von feuchter Kohle |
-
1980
- 1980-09-05 DE DE3033461A patent/DE3033461C2/de not_active Expired
-
1981
- 1981-09-04 DK DK391981A patent/DK161712C/da not_active IP Right Cessation
- 1981-09-04 AT AT81106956T patent/ATE11303T1/de not_active IP Right Cessation
- 1981-09-04 EP EP81106956A patent/EP0047509B1/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0370144A1 (fr) * | 1987-09-03 | 1990-05-30 | Kawasaki Jukogyo Kabushiki Kaisha | Procédé de régulation de l'humidité du charbon |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3033461C2 (de) | 1982-11-04 |
| DK161712B (da) | 1991-08-05 |
| DK391981A (da) | 1982-03-06 |
| EP0047509A3 (en) | 1982-04-21 |
| DE3033461A1 (de) | 1982-03-25 |
| EP0047509B1 (fr) | 1985-01-16 |
| ATE11303T1 (de) | 1985-02-15 |
| DK161712C (da) | 1992-02-24 |
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