EP0170304B1 - Clinker cooler with dedusting device in a process for the production of cement - Google Patents

Clinker cooler with dedusting device in a process for the production of cement Download PDF

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Publication number
EP0170304B1
EP0170304B1 EP19850200949 EP85200949A EP0170304B1 EP 0170304 B1 EP0170304 B1 EP 0170304B1 EP 19850200949 EP19850200949 EP 19850200949 EP 85200949 A EP85200949 A EP 85200949A EP 0170304 B1 EP0170304 B1 EP 0170304B1
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EP
European Patent Office
Prior art keywords
dedusting
clinker cooler
dust
air
clinker
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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.)
Expired - Lifetime
Application number
EP19850200949
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German (de)
French (fr)
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EP0170304A2 (en
EP0170304A3 (en
Inventor
Werner Maus
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GEA Group AG
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Metallgesellschaft AG
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Publication of EP0170304A3 publication Critical patent/EP0170304A3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0266—Cooling with means to convey the charge on an endless belt

Definitions

  • the invention relates to a clinker cooler with a dedusting device in a method for producing cement, the hot clinker falling at temperatures of 1150 to 1300 ° C. on an air-permeable conveyor belt and being cooled with cooling air passed through the conveyor belt, the cooling air then passed through a dedusting device and up to a residual dust content of about 30 to 100 mg / Nm3 is dedusted and a solid transport device receiving the cooled clinker is arranged under the clinker cooler.
  • the clinker cooler is a known part of a plant for cement production, and the dedusting device for the cooling air coming from the clinker cooler is also known.
  • Methods and devices are known from documents DE-B-1 209 040, DE-A-2 327 903 and US-A-3 704 525 which relate to the cooling of cement with cooling air and the dedusting of the dust-laden exhaust air which is produced in the process.
  • the known methods and devices use the exhaust air either as secondary air for the combustion process and / or perform a separate cleaning of the exhaust air. Since the dedusting device in systems with a separate cleaning of the exhaust air has a large volume and weight due to the necessary performance, it is common to place the dedusting device next to the clinker cooler. This arrangement of clinker cooler and Dedusting device leads to considerable space requirements, to a relatively long cooling air line from the clinker cooler to the dedusting device and for the latter to a separate dust transport device.
  • the invention has for its object to provide a combination of clinker cooler and dedusting device, the space requirement is small and which reduces the plant and operating costs. According to the invention, this is done by a clinker cooler with an air-permeable conveyor belt, a cooling air supply device, a solids transport device and at least one dedusting element, consisting of a cyclone with a downstream granulate filter, the dedusting element being arranged above the clinker cooler and connected to it via a short line and with a discharge line for the dust deposited in the dedusting element is provided, the discharge opening directly above the solids transport device.
  • the arrangement according to the invention makes it possible to supply the dust-containing cooling air from the clinker cooler with a short line to the dedusting device, and at the same time the solids transport device which necessarily belongs to the clinker cooler can also transport the dust accumulating in the dedusting device.
  • Another advantage is the small space requirement of the system combination. The main advantage, however, is that the corrosion problems normally caused by the dust-containing exhaust gas are almost completely avoided.
  • Granulate filters in which the dust is removed from the air passed through the layer through a layer of solid granulate, are known per se and are described, for example, in DE-C-27 19 544 and Document DE-A-29 51 877 described. These filters have the advantage that, on the one hand, they ensure good dust separation and, on the other hand, the dust-laden granulate can be cleaned and reused continuously and easily.
  • the clinker cooler with dedusting device is advantageously used for cooling hot clinker at temperatures of 1150 to 1300 ° C. by cooling air and for dedusting any dust-laden exhaust air to a residual dust content of about 30 to 100 mg / Nm3.
  • FIG. 1 An embodiment of the invention is shown in the drawing. It shows a schematic representation of a longitudinal section through the clinker cooler with associated dedusting device.
  • the hot clinker comes with temperatures from 1150 to 1300 ° C e.g. from a rotary tube, not shown, and passes through the inlet 1 of the clinker cooler 2 onto an inclined conveyor belt 3.
  • the conveyor belt 3 consists in a known manner of air-permeable metal members.
  • Cooling air is first fed from the blower 4 to an invisible manifold, from which the cooling air enters the clinker cooler below the conveyor belt 3 through numerous openings 5.
  • the cooling air flows upwards through the conveyor belt 3 and the clinker layer thereon, which is not shown.
  • Cooling air containing dust leaves the clinker cooler through the exhaust pipe 6.
  • Cooled clinker with a temperature of approximately 70-120 ° C. falls at the lower end of the conveyor belt 3 in the direction of arrow 7 through a drain 8 onto an endless transport device 9.
  • This transport device 9 which is only partially shown in the drawing, for example in a known manner be designed as a drag chain. Solids that fall down in the clinker cooler 2 also reach the transport device 9 through a plurality of derivatives 12.
  • the solid-containing cooling air in the exhaust pipe 6 is fed to a multi-part dedusting device, which is shown only partially and in simplified form in the drawing.
  • the dedusting device can consist, for example, of several dedusting elements 13 connected in parallel, of which the drawing shows one element.
  • This element consists of a cyclone 14 with a downstream granulate filter 15.
  • the dust-containing cooling air is first roughly dedusted in the cyclone 14, the air flowing helically around a tube 16 and reaching the granulate filter 15 through the lower end of the tube.
  • the flow path of the air out of the tube 16 into the granulate filter 15 is indicated by the arrows 17a and 17b.
  • the granulate filter 15 has an essentially cylindrical granulate layer 18, which is located between air-permeable walls.
  • the dust-containing air flows through the granulate layer 18 from the outside in, as indicated by the arrows 19a and 19b.
  • the fine dust content is retained in the granulate layer and the exhaust air cleaned to a residual dust content of 30 to 100 mg / Nm3 is led through line 22 to the common exhaust air chimney.
  • the filter is separated from the line 22 in a manner not shown, and the granulate is conveyed pneumatically through a central line 20 from bottom to top to a collecting container 21 and through which purge air flows against the normal gas direction, the lighter dust from the heavier granulate is spotted.
  • the conveying gas used for the line 20, usually air, is fed into the exhaust pipe 6.
  • the dust falls through the pipe 16 into the solid line 26.
  • Dust-free granulate collects in the container 21 and flows back to the granule layer 18 via several downpipes 23. Dust-free air leaves the granule filter in the clean gas line 22, which usually leads to a collecting line with a fan, which is not shown in the drawing for simplification.
  • the solids deposited in the cyclone 14 and during the cleaning process of the granulate layer 18 fall into a line 26 and pass through this line to the transport device 9.
  • the line 26 runs outside the clinker cooler 2, which is indicated by the line line shown in broken lines. If several dedusting elements 13 are connected in parallel, as is customary, all solid lines 26 of these elements discharge their solids to the transport device 9, so that an additional transport device is unnecessary.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)

Description

Die Erfindung betrifft einen Klinkerkühler mit Entstaubungsvorrichtung in einem Verfahren zur Zementherstellung, wobei der heiße Klinker mit Temperaturen von 1150 bis 1300°C auf ein luftdurchlässiges Transportband fällt und mit durch das Transportband geleiteter Kühlluft gekühlt wird, die Kühlluft anschließend durch eine Entstaubungsvorrichtung geführt und bis auf einen restlichen Staubgehalt von etwa 30 bis 100 mg/Nm³ entstaubt wird und unter dem Klinkerkühler eine den gekühlten Klinker aufnehmende Feststofftransportvorrichtung angeordnet ist.The invention relates to a clinker cooler with a dedusting device in a method for producing cement, the hot clinker falling at temperatures of 1150 to 1300 ° C. on an air-permeable conveyor belt and being cooled with cooling air passed through the conveyor belt, the cooling air then passed through a dedusting device and up to a residual dust content of about 30 to 100 mg / Nm³ is dedusted and a solid transport device receiving the cooled clinker is arranged under the clinker cooler.

Der Klinkerkühler ist ein bekannter Teil einer Anlage zur Zementherstellung, ebenso ist die Entstaubungsvorrichtung für die aus dem Klinkerkühler kommende Kühlluft bekannt. Aus den Dokumenten DE-B-1 209 040, DE-A-2 327 903 und US-A-3 704 525 sind Verfahren und Vorrichtungen bekannt, die die Kühlung von Zement mit Kühlluft und eine Entstaubung der dabei anfallenden staubbeladenen Abluft betreffen. Die bekannten Verfahren und Vorrichtungen verwenden die Abluft entweder als Sekundärluft für den Brennprozeß und/oder führen eine separate Reinigung der Abluft durch. Da die Entstaubungsvorrichtung bei Anlagen mit einer separaten Reinigung der Abluft aufgrund der nötigen Leistungsfähigkeit ein großes Volumen und großes Gewicht besitzt, ist es üblich, die Entstaubungsvorrichtung neben den Klinkerkühler zu stellen. Diese Anordnung von Klinkerkühler und Entstaubungsvorrichtung führt zu erheblichem Platzbedarf, zu einer relativ langen Kühlluftleitung vom Klinkerkühler zur Entstaubungsvorrichtung und für Letztere zu einer separaten Staubtransportvorrichtung.The clinker cooler is a known part of a plant for cement production, and the dedusting device for the cooling air coming from the clinker cooler is also known. Methods and devices are known from documents DE-B-1 209 040, DE-A-2 327 903 and US-A-3 704 525 which relate to the cooling of cement with cooling air and the dedusting of the dust-laden exhaust air which is produced in the process. The known methods and devices use the exhaust air either as secondary air for the combustion process and / or perform a separate cleaning of the exhaust air. Since the dedusting device in systems with a separate cleaning of the exhaust air has a large volume and weight due to the necessary performance, it is common to place the dedusting device next to the clinker cooler. This arrangement of clinker cooler and Dedusting device leads to considerable space requirements, to a relatively long cooling air line from the clinker cooler to the dedusting device and for the latter to a separate dust transport device.

Der Erfindung liegt die Aufgäbe zugrunde, eine Kombination von Klinkerkühler und Entstaubungsvorrichtung zu schaffen, deren Platzbedarf gering ist und welche die Anlagen- und Betriebskosten verringert. Erfindungsgemäß geschieht dies durch einen Klinkerkühler mit einem luftdurchlässigen Transportband, einer Kühlluftzufuhreinrichtung, einer Feststofftransportvorrichtung und mindestens einem Entstaubungselement, bestehend aus einem Zyklon mit nachgeschaltetem Granulatfilter, wobei das Entstaubungselement über dem Klinkerkühler angeordnet und mit diesem über eine kurze Leitung verbunden sowie mit einer Ableitung für den im Entstaubungselement abgeschiedenen Staub versehen ist, wobei die Ableitung unmittelbar über der Feststofftransportvorrichtung mündet.The invention has for its object to provide a combination of clinker cooler and dedusting device, the space requirement is small and which reduces the plant and operating costs. According to the invention, this is done by a clinker cooler with an air-permeable conveyor belt, a cooling air supply device, a solids transport device and at least one dedusting element, consisting of a cyclone with a downstream granulate filter, the dedusting element being arranged above the clinker cooler and connected to it via a short line and with a discharge line for the dust deposited in the dedusting element is provided, the discharge opening directly above the solids transport device.

Die erfindungsgemäße Anordnung macht es möglich, die staubhaltige Kühlluft aus dem Klinkerkühler mit einer kurzen Leitung der Entstaubungsvorrichtung zuzuführen, und gleichzeitig kann die zum Klinkerkühler notwendigerweise gehörende Feststofftransportvorrichtung auch den in der Entstaubungsvorrichtung anfallenden Staub transportieren. Ein weiterer Vorteil ist der geringe Platzbedarf der Anlagenkombination. Vorteilhaft ist aber vor allem, daß die durch das staubhaltige Abgas normalerweise verursachten Korrosionsprobleme nahezu vollständig vermieden werden.The arrangement according to the invention makes it possible to supply the dust-containing cooling air from the clinker cooler with a short line to the dedusting device, and at the same time the solids transport device which necessarily belongs to the clinker cooler can also transport the dust accumulating in the dedusting device. Another advantage is the small space requirement of the system combination. The main advantage, however, is that the corrosion problems normally caused by the dust-containing exhaust gas are almost completely avoided.

Granulatfilter, bei denen der Staub durch eine Schicht von Feststoffgranulat aus der durch die Schicht hindurchgeleiteten Luft entfernt wird, sind an sich bekannt und z.B. in der Druckschrift DE-C-27 19 544 und der Druckschrift DE-A-29 51 877 beschrieben. Diese Filter haben den Vorteil, daß sie einerseits eine gute Staubabscheidung gewährleisten und andererseits die Abreinigung und Wiederverwendung des staubbeladenen Granulats kontinuierlich und auf einfache Weise erfolgen kann.Granulate filters, in which the dust is removed from the air passed through the layer through a layer of solid granulate, are known per se and are described, for example, in DE-C-27 19 544 and Document DE-A-29 51 877 described. These filters have the advantage that, on the one hand, they ensure good dust separation and, on the other hand, the dust-laden granulate can be cleaned and reused continuously and easily.

In vorteilhafter Weise wird der Klinkerkühler mit Entstaubungsvorrichtung zur Abkühlung von heißem Klinker mit Temperaturen von 1150 bis 1300°C durch Kühlluft und zur Entstaubung von dabei anfallender staubbeladener Abluft bis auf einen restlichen Staubgehalt von etwa 30 bis 100 mg/Nm³ verwendet.The clinker cooler with dedusting device is advantageously used for cooling hot clinker at temperatures of 1150 to 1300 ° C. by cooling air and for dedusting any dust-laden exhaust air to a residual dust content of about 30 to 100 mg / Nm³.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt. Sie zeigt in schematischer Darstellung einen Längsschnitt durch den Klinkerkühler mit zugehöriger Entstaubungsvorrichtung.An embodiment of the invention is shown in the drawing. It shows a schematic representation of a longitudinal section through the clinker cooler with associated dedusting device.

Der heiße Klinker kommt mit Temperaturen von 1150 bis 1300 °C z.B. aus einem nicht dargestellten Drehrohr und gelangt durch den Zulauf 1 des Klinkerkühlers 2 auf ein schräges Transportband 3. Das Transportband 3 besteht in bekannter Weise aus luftudurchlässigen Metallgliedern.The hot clinker comes with temperatures from 1150 to 1300 ° C e.g. from a rotary tube, not shown, and passes through the inlet 1 of the clinker cooler 2 onto an inclined conveyor belt 3. The conveyor belt 3 consists in a known manner of air-permeable metal members.

Vom Gebläse 4 wird Kühlluft zunächst einer nicht sichtbaren Sammelleitung zugeführt, von der die Kühlluft durch zahlreiche Öffnungen 5 in den Klinkerkühler unterhalb des Transportbandes 3 eintritt. Die Kühlluft strömt nach oben durch das Transportband 3 und die darauf befindliche Klinkerschicht, die nicht dargestellt ist. Staubhaltige Kühlluft verläßt den Klinkerkühler durch das Abgasrohr 6. Gekühlter Klinker mit einer Temperatur etwa im Bereich von 70 - 120 °C fällt am unteren Ende des Transportbandes 3 in Richtung des Pfeils 7 durch einen Ablauf 8 auf eine endlose Transportvorrichtung 9. Diese Transportvorrichtung 9, die in der Zeichnung nur teilweise dargestellt ist, kann in bekannter Weise z.B. als Schleppkette ausgebildet sein. Feststoffe, die im Klinkerkühler 2 nach unten fallen, gelangen durch mehrere Ableitungen 12 ebenfalls zur Transportvorrichtung 9.Cooling air is first fed from the blower 4 to an invisible manifold, from which the cooling air enters the clinker cooler below the conveyor belt 3 through numerous openings 5. The cooling air flows upwards through the conveyor belt 3 and the clinker layer thereon, which is not shown. Cooling air containing dust leaves the clinker cooler through the exhaust pipe 6. Cooled clinker with a temperature of approximately 70-120 ° C. falls at the lower end of the conveyor belt 3 in the direction of arrow 7 through a drain 8 onto an endless transport device 9. This transport device 9, which is only partially shown in the drawing, for example in a known manner be designed as a drag chain. Solids that fall down in the clinker cooler 2 also reach the transport device 9 through a plurality of derivatives 12.

Die feststoffhaltige Kühlluft im Abgasrohr 6 wird einer mehrteiligen Entstaubungsvorrichtung zugeführt, die in der Zeichnung nur teilweise und vereinfacht dargestellt ist. Die Entstaubungsvorrichtung kann z.B. aus mehreren parallelgeschalteten Entstaubungselementen 13 bestehen, von denen die Zeichnung ein Element zeigt. Dieses Element besteht aus einem Zyklon 14 mit nachgeschalteter Granulatfilter 15. Die staubhaltige Kühlluft wird zunächst im Zyklon 14 grob entstaubt, wobei die Luft ein Rohr 16 wendelförmig umströmt und durch das untere Ende des Rohres nach oben zum Granulatfilter 15 gelangt. Der Strömungsweg der Luft aus dem Rohr 16 heraus in das Granulatfilter 15 hinein ist durch die Pfeile 17a und 17b angedeutet.The solid-containing cooling air in the exhaust pipe 6 is fed to a multi-part dedusting device, which is shown only partially and in simplified form in the drawing. The dedusting device can consist, for example, of several dedusting elements 13 connected in parallel, of which the drawing shows one element. This element consists of a cyclone 14 with a downstream granulate filter 15. The dust-containing cooling air is first roughly dedusted in the cyclone 14, the air flowing helically around a tube 16 and reaching the granulate filter 15 through the lower end of the tube. The flow path of the air out of the tube 16 into the granulate filter 15 is indicated by the arrows 17a and 17b.

Das Granulatfilter 15 weist eine im wesentlichen zylindrische Granulatschicht 18 auf, die sich zwischen luftdurchlässigen Wänden befindet. Die Granulatschicht 18 wird von außen nach innen von der staubhaltigen Luft durchströmt, wie das durch die Pfeile 19a und 19b angedeutet ist. Der Feinstaubanteil wird in der Granulatschicht zurückgehalten und die auf einen Reststaubgehalt von 30 bis 100 mg/Nm³ gereinigte Abluft durch die Leitung 22 zum gemeinsamen Abluftkamin geführt. Zur Abreinigung des mit Staub beladenen Granulats wird das Filter in nicht dargestellter Weise von der Leitung 22 getrennt, und das Granulat wird pneumatisch durch eine zentrale Leitung 20 von unten nach oben zu einem Sammelbehälter 21 gefördert und entgegen der normalen Gasrichtung von Spülluft durchströmt, wobei der leichtere Staub vom schwereren Granulat ausgesichtet wird. Das für die Leitung 20 verwendete Fördergas, üblicherweise Luft, wird in das Abgasrohr 6 geführt. Der Staub fällt durch das Rohr 16 in die Feststoffleitung 26. Entstaubtes Granulat sammelt sich im Behälter 21 und fließt über mehrere Falleitungen 23 zurück zur Granulatschicht 18. Entstaubte Luft verläßt das Granulatfilter in der Reingasleitung 22, die üblicherweise zu einer Sammelleitung mit Gebläse führt, was in der Zeichnung jedoch zur Vereinfachung nicht dargestellt ist.The granulate filter 15 has an essentially cylindrical granulate layer 18, which is located between air-permeable walls. The dust-containing air flows through the granulate layer 18 from the outside in, as indicated by the arrows 19a and 19b. The fine dust content is retained in the granulate layer and the exhaust air cleaned to a residual dust content of 30 to 100 mg / Nm³ is led through line 22 to the common exhaust air chimney. To clean the dust-laden granulate, the filter is separated from the line 22 in a manner not shown, and the granulate is conveyed pneumatically through a central line 20 from bottom to top to a collecting container 21 and through which purge air flows against the normal gas direction, the lighter dust from the heavier granulate is spotted. The conveying gas used for the line 20, usually air, is fed into the exhaust pipe 6. The dust falls through the pipe 16 into the solid line 26. Dust-free granulate collects in the container 21 and flows back to the granule layer 18 via several downpipes 23. Dust-free air leaves the granule filter in the clean gas line 22, which usually leads to a collecting line with a fan, which is not shown in the drawing for simplification.

Die im Zyklon 14 und während des Reinigungsvorgangs der Granulatschicht 18 abgeschiedenen Feststoffe fallen in eine Leitung 26 und gelangen durch diese Leitung zur Transportvorrichtung 9. Die Leitung 26 verläuft außen am Klinkerkühler 2 vorbei, was durch die gestrichelt gezeichnete Leitungsführung angedeutet ist. Wenn mehrere Entstaubungselemente 13 parallelgeschaltet sind, wie das üblich ist, geben alle Feststoffleitungen 26 dieser Elemente ihre Feststoffe an die Transportvorrichtung 9 ab, so daß eine zusätzliche Transportvorrichtung unnötig wird.The solids deposited in the cyclone 14 and during the cleaning process of the granulate layer 18 fall into a line 26 and pass through this line to the transport device 9. The line 26 runs outside the clinker cooler 2, which is indicated by the line line shown in broken lines. If several dedusting elements 13 are connected in parallel, as is customary, all solid lines 26 of these elements discharge their solids to the transport device 9, so that an additional transport device is unnecessary.

Claims (2)

  1. A clinker cooler provided with a deduster in a process of making cement, consisting of the klinker cooler comprising an air-permeable conveyor belt, means for supplying cooling air, a conveyor for solids, and at least one dedusting element consisting of a cyclone and a succeeding granule filter, wherein the dedusting element is disposed over the clinker cooler and is connected to the latter by a short duct, and a discharge line is provided for the dust that has been separated in the dedusting element, which discharge line opens directly over the conveyor for solids.
  2. The use of a clinker cooler provided with a deduster according to claim 1 for cooling hot clinker from temperatures between 1150 and 1300°C by means of cooling air and for dedusting resulting dust-laden waste air to a residual dust content of about 30 to 100 milligrams per standard cubic meter.
EP19850200949 1984-06-30 1985-06-15 Clinker cooler with dedusting device in a process for the production of cement Expired - Lifetime EP0170304B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3424170 1984-06-30
DE19843424170 DE3424170A1 (en) 1984-06-30 1984-06-30 CLINKER COOLER WITH DEDUSTING DEVICE IN A METHOD FOR THE PRODUCTION OF CEMENT

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EP0170304A2 EP0170304A2 (en) 1986-02-05
EP0170304A3 EP0170304A3 (en) 1989-10-11
EP0170304B1 true EP0170304B1 (en) 1993-12-22

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JP (1) JPH0625006B2 (en)
DE (2) DE3424170A1 (en)
ES (1) ES8703392A1 (en)

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AT511613B1 (en) * 2012-01-24 2013-01-15 Inteco Special Melting Technologies Gmbh METHOD AND APPARATUS FOR EXHAUST GAS CLEANING IN VACUUM STEEL TREATMENT PROCESSES
CN112209645B (en) * 2020-10-20 2022-06-24 杭州山亚南方水泥有限公司 Clinker reducing and coal burning dilution device for cement production

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DE3424170C2 (en) 1992-10-29
ES544643A0 (en) 1987-02-16
EP0170304A2 (en) 1986-02-05
DE3424170A1 (en) 1986-02-27
JPH0625006B2 (en) 1994-04-06
DE3587692D1 (en) 1994-02-03
ES8703392A1 (en) 1987-02-16
EP0170304A3 (en) 1989-10-11
JPS6117455A (en) 1986-01-25

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