WO2019197195A1 - Installation et lance de brûleur pour la production ultérieure de ciment blanc - Google Patents

Installation et lance de brûleur pour la production ultérieure de ciment blanc Download PDF

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Publication number
WO2019197195A1
WO2019197195A1 PCT/EP2019/058168 EP2019058168W WO2019197195A1 WO 2019197195 A1 WO2019197195 A1 WO 2019197195A1 EP 2019058168 W EP2019058168 W EP 2019058168W WO 2019197195 A1 WO2019197195 A1 WO 2019197195A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotary kiln
burner lance
cooling water
cement clinker
cement
Prior art date
Application number
PCT/EP2019/058168
Other languages
German (de)
English (en)
Inventor
Ravi SAKSENA
André SYBON
Alexander Knoch
Original Assignee
Khd Humboldt Wedag Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Khd Humboldt Wedag Gmbh filed Critical Khd Humboldt Wedag Gmbh
Priority to EP19716842.0A priority Critical patent/EP3775742B1/fr
Priority to DK19716842.0T priority patent/DK3775742T3/da
Publication of WO2019197195A1 publication Critical patent/WO2019197195A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/34—Arrangements of heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/38—Arrangements of cooling devices
    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/001—Cooling of furnaces the cooling medium being a fluid other than a gas
    • F27D2009/0013—Cooling of furnaces the cooling medium being a fluid other than a gas the fluid being water
    • F27D2009/0016—Water-spray

Definitions

  • the invention relates to a plant for the production of cement clinker for the further production of white cement, comprising a rotary kiln for sintering lime-containing and silicate-containing raw meal and optionally other oxides to cement clinker, wherein a burner lance is present at Drehrohrofenkopf the Drehrohro- fens to produce the necessary Sintering temperature in the rotary kiln, and wherein the burner lance extends into the rotary kiln, and at least one line for guiding cooling water in the rotary kiln for quenching the sintered cement clinker still in the rotary kiln.
  • white cement for use as a high-performance cement has not been fully explored, despite its long-standing reputation, and it is conceivable that white cement has a number of advantages that are unknown today, which distinguish this cement for special applications.
  • the production of white cement requires not only the selection of selected raw materials, which are free of cement color-changing iron, manganese, chromium or titanium, but also requires compliance with the particular manufacturing conditions required for the production of white cement - cement clinker. Blanco-Varela et al. have in Adv. in Cement Research, 1997, 9, no.
  • German patent application DE 25 44 343 B2 discloses a process for the production of white cement.
  • it is taught to throw off the cement clinker from the rotary kiln to a paddle wheel.
  • the paddle wheel transports the hot cement clinker past two spray nozzles.
  • fuel oil is sprayed onto the still hot cement clinker, during which the fuel oil heats up and ignites.
  • the reductive atmosphere is maintained and immediately after spraying with fuel oil, the cement clinker is sprayed with water. The water cools the cement clinker that is burning in the fuel oil.
  • German Offenlegungsschrift DE 2 041 834 discloses a device for producing white cement, in which cement clinker is sintered in an upper chamber initially under highly reductive conditions in a rotary kiln subdivided by a permeable bulkhead into two sections, and subsequently discharged from the lower chamber is deterred.
  • cooling water emerges from nozzles which are arranged in the rotary kiln housing to cool the fired cement clinker by spraying the cooling water directly onto the clinker.
  • the division of the rotary kiln is problematic because the passages can easily clog in operation by sixteengebackene Zementklinkeranphaseufonne. In such a case, the rotary kiln can be damaged.
  • German Patent DE 1 178 769 teaches a method of burning white cement. According to this patent specification, the idea is to spray the reducing agent and the water in close proximity to one another onto the cement clinker bed rolling in the rotary kiln in a region present at the end of the rotary kiln via a combined pipe for injecting reducing agent and water. It is important that the spray cones of the reducing agent and the water do not overlap. In this arrangement, the supply pipes are exposed in the rotary kiln and are immediately exposed to the chemically / physically aggressive environment of the rotary kiln.
  • the object of the invention is to provide a plant for the production of cement clinker for the further production of white cement available, the robust and is reliable.
  • the cement clinker is to be manufactured for the production of white ce- ment with high quality.
  • the burner lance has at least one line for guiding cooling water, wherein the line for guiding cooling water in the area between the burner mouth and the end of the rotary kiln furnace opens and cooling water to the sintered cement clinker sprayed.
  • At least one cooling water line is part of the burner lance itself.
  • Burner lance and cooling water pipe are integrated.
  • the burner lance thus provides the flame for heating the rotary kiln and at the same time it provides a cooling medium.
  • the connection of the burner lance with the cooling water has several advantages.
  • the production of white cement requires much higher energy input than the production of gray cement, because the necessary temperature for sintering the cement clinker due to the lack of iron oxide, which supports the sintering process in the production of gray cement by its action as a flux , does not exist.
  • the higher energy input also means a higher thermal load on the burner itself, which is usually protected from the heat in the rotary kiln by a shroud with a refractory material, referred to in English as "Refractory”.
  • the burner lance is cooled by the primary air and the fuel, both of which flow through the burner lance itself. If, as provided according to the invention, a cooling water line is provided as part of the burner lance itself, this at least one line for guiding cooling water causes cooling of the burner lance so that the burner lance has a longer service life during operation.
  • Quenching the cement clinker still in the rotary kiln by water has the well-known advantage that the reductive environment in the rotary kiln itself can be better controlled than when cooling the cement clinker by atmospheric air outside the rotary kiln is the case.
  • a reducing agent usually oil, heating oil or another combustible medium, including gas, as protective Use reducing agent. The result is thus the contradictory effect that the reducing agent is usually used by generating even more heat in the immediate vicinity of the coolant.
  • the mouths between the burner mouth and the end of the rotary kiln are distributed raw.
  • the lines for carrying cooling water are housed within the refractory shroud.
  • a water pipe is created at the burner lance without refractory sheathing.
  • the refractory sheathing which is usually made of a refractory refractory material, around the burner lance with a corresponding formwork cast.
  • This very simple and inexpensive method of production is already suitable for use with the burner lance according to the invention.
  • the at least one line for guiding cooling water is either part of the flow-guiding parts of the burner lance itself or is connected to it in a thermally conductive manner.
  • the refractory material has as its essential function a very poor heat conduction.
  • the cooling effect of the cooling water would therefore have little cooling effect on the burner lance when encapsulated in the castable refractory material (Refractory).
  • Refractory castable refractory material
  • the burner lance is movably mounted outside a Drehrohro- fenkopfgeperuses, whereby the depth at which the burner lance extends into the rotary kiln, variable is. Due to this adjustability, the plant can produce cement clinker for gray Portland cement or cement clinker for white cement in various configurations. If the burner lance is inserted deep into the rotary kiln, the burner lance in the part of the rotary kiln behind the burner mouth can cool the cement clinker and at the same time create a barrier to the reductive atmosphere.
  • the cooling of the burner lance can be switched off.
  • the cement clinker is not quenched in the rotary kiln, but dumped into a cooler following the rotary kiln on the material flow side, where the cement clinker is cooled with atmospheric air.
  • This cooling air can then be passed as secondary air into the rotary kiln for recuperation of the radiator waste heat or, as tertiary air, past the rotary kiln into a material flow side of the rotary kiln. switched preheating and calcining be passed.
  • the retraction of the burner lance thus lengthens the available rotary kiln length so that the cement clinker can be sintered to produce gray cement having a lower temperature but a somewhat longer residence time in the rotary kiln.
  • the rotary kiln opens into a clinker cooler, below a Abschöff- opening of the rotary kiln, a flap is present, which releases or covers a clinker breaker, wherein the flap in the open state, the discarded from the rotary kiln Guides cement clinker on the clinker breaker, and in the closed state, the cement clinker discarded from the rotary kiln passes into the clinker cooler.
  • the cement clinker will not pass through the clinker cooler.
  • the cement clinker for the production of white cement clinker is ready for cooling when it is dropped from the rotary kiln, the temperature is about 250 ° C, that no further cooling before crushing is necessary.
  • Cement clinker with a temperature of 250 ° C can easily be broken with a crusher.
  • the final cooling can be done with atmospheric air, whereby the internal transport via conveyor belts cools the cement clinker to acceptable temperatures for storage in a clinker silo. A transport through a clinker cooler is therefore not absolutely necessary in the production of cement clinker for the further production of white cement.
  • the still hot cement clinker for the production of gray cement is passed over the closed flap into the clinker cooler, where the clinker is cooled with atmospheric air.
  • the cooler exhaust air can be used for recuperation.
  • a hot gas generator heats cooling air from the radiator end or from the free atmosphere and conducts it into the radiator inlet housing, where the heated cooling air flows as secondary air into the rotary kiln and passes as tertiary air into other parts of the system. With the flap open, the cement clinker falls directly onto the crusher. However, any exhaust air on the rotary kiln may flow through the radiator housing, atmospheric air being drawn into the hot gas generator by the radiator.
  • the amount of water introduced into the rotary kiln is very critical. If too little water is introduced, the barrier between the atmospheric air and the reductive environment in the rotary kiln collapses. The cement clinker is not cooled enough so that the cement clinker for the production of white cement has only a low quality. If, however, too much water is sprayed onto the cement clinker, the cement clinker on the surface can undergo a hydraulic reaction as the beginning of setting, which reduces the quality of the clinker. In addition, the temperature in the rotary kiln is unnecessarily reduced by excessive cooling, which drives the energy costs in the air and reduces the clinker yield.
  • a control device controls the amount of cooling water, which flows through the line per unit time, which is provided for cooling the Zementklin- kers.
  • the controlled system consists in this case of the measurement of the clinker temperature, which is thrown off the rotary kiln on the amount of water flowing per unit time in the rotary kiln. Temperatures in the range between 200 ° C and 300 ° C with a target temperature of about 250 ° C are suitable as the control temperature.
  • the amount of water needed to cool the clinker can be calculated from the specific enthalpy of evaporation of water. An amount of 1 kg cement clinker with a heat capacity of about 1 kJ / kg / K (actually slightly less) requires approx.
  • thermolysis of the cooling water occurs, the water requirement for cooling the cement clinker is reduced considerably because the thermolysis of the water is strongly endothermic. A thermolysis is therefore even desirable because the thermolysis of the cooling water on the one hand extracts heat from the cement clinker and recuperates heat in the area of the flame of the burner lance by reverse reaction.
  • a further embodiment of the invention can be provided to remove air from a rotary kiln following clinker cooler, in particular from the rear part, in which the cooler exhaust air is around 100 ° C to 150 ° C.
  • These cooler exhaust air which only carries small amounts of heat, is heated to approximately 300 ° C. to 350 ° C. by means of a hot gas generator and fed to the housing of the burner lance as additional primary air.
  • This arrangement allows the vapors produced in the water cooling, can be withdrawn from the rotary kiln, without this the rotary kiln lacks the necessary supply air, which is needed for the operation of the heat exchanger and the rotary kiln following calciner as carrier air.
  • the vapors produced by cooling the clinker with water can be removed from the kiln head and thus do not burden the kiln process. Nevertheless, enough combustion air can be supplied via the main burner.
  • the preheated air can be used on the main burner with less or even without any supporting fuel such as natural gas or crude oil.
  • additional fuel is also burned in the hot gas generator, through the optimization of the combustion chambers and the spatial separation but with an improved overall efficiency. With suitable process control, an ash-rich, but ignitable fuel such as lignite dust could be burned in the hot gas generator, the ash would then be separated via a cyclone before the hot gases are fed into the process.
  • the burner cooling tube thermally less burdened, so that it is quite possible to work with relatively hot air.
  • the cooling pipe can be efficiently cooled by means of a small amount of ambient air, which is sucked into the pipe through suitably dimensioned openings.
  • FIG. 1 shows an illustration of a rotary kiln furnace head housing with a rotary kiln connected to the left, part of a cooler and burner lance according to the invention in a first configuration for the production of cement clinker for the further production of white cement,
  • FIG. 2 shows an illustration of a rotary kiln furnace head housing with a rotary kiln connected to the left, part of a cooler and burner lance according to the invention in a second configuration for the production of cement clinker for the production of gray cement
  • Fig. 3 shows an embodiment of the Drehrohrofenkopfgefits with H possessgaserzeu- ger, which is supplied to the burner housing as the primary air.
  • FIG. 1 shows an illustration of a rotary tubular furnace head housing 10 with a rotary kiln 15 on the left, part of a clinker cooler 20 and burner lance 25 according to the invention in a first configuration for producing cement clinker for the further production of white cement.
  • the movably mounted burner lance 25 is pulled out of the rotary kiln 15 as much as possible.
  • the burner lance 25 is passed through the rotary kiln housing 10 and protrudes into the rotary kiln 15.
  • the flame 30 emerging from the burner lance generates a temperature of about 1450 ° C.
  • the still hot cement clinker dropped by the rotary straw 15 slips through the flap 50 acting as an inlet chute onto a cooling grate 60 on the right in the clinker cooler 20, where the cement clinker 45 is cooled by atmospheric air 65 flowing through the cooling grate 60 from below ,
  • the heated radiator exhaust air 70 flows against the material flow direction indicated by arrow 75 in the direction of the rotary kiln 40 where the hot radiator exhaust 70 flows on the one hand into the rotary kiln 15 as secondary air 80 or as tertiary air 85 into a calciner, not shown here, through the tertiary air duct 90 flows.
  • An existing here in Drehrohrofenkopfgepuruse 10 supply air line 95 is in this configuration shown here without function.
  • FIG. 2 shows the identical plant for producing cement clinker in a second configuration shown here.
  • the open flap 50 which is set in such a way that cement clinker 45 falling out of the rotary kiln 15, acts directly on a crusher 115 which blocks the cement clinker, which has already been quenched and cooled down to approximately 250 ° C. 45 minced.
  • Below the crusher 115 a not essential for the invention conveyor belt is arranged, which removes the broken cement clinker 45.
  • the burner lance 25 is guided into the rotary kiln 15 as far as possible via its movable mounting.
  • the lines 110 for guiding cooling water are supplied with water in relation to the system configuration in FIG.
  • This water fulfills several functions.
  • a first function is cooling the burner lance, which is here far in the rotary kiln 15, and is therefore exposed to a high thermal load.
  • a second function is the spraying of the cooling water onto the calcined crude meal 35, which is still about 1,400 ° C. to 1,450 ° C., and which is in the sintering process to cement clinker 45.
  • cement clinker for the further production of white cement, it is important to use raw materials that are particularly low in iron (Fe), manganese (Mn), chromium (Cr) and titanium (Ti). Due to the aforementioned poverty, the melting point of the raw meal is significantly higher, namely by about 100 K, higher.
  • the raw meal crystallizes to the C, A and S phases known in the field of cement science.
  • This crystallization requires very rapid cooling so that in the very complex phase diagram of the raw raw meal 35 there are no other phases at higher temperature, which otherwise, at slower cooling, will not yield the desired C, A by thermodynamic control - and S-phases lead.
  • the rapid cooling of the raw meal 35 prevents crystallization of the thermodynamically forming phases at other temperatures in the desired cement clinker 45, which on the one hand does not show the hydraulic properties of the cement clinker 45 and could also discolor the cement clinker 45.
  • thermolysis Due to the presence of the catalytically highly effective raw meal 35 and / or cement clinker 45 granules, it can also happen that the cooling water undergoes a thermolysis with splitting of the water into molecular hydrogen and oxygen, which in addition to the pure water evaporation with a very high heat capacity, the raw meal 35 / the cement clinker 45 further draws considerable heat. Although it is known that water undergoes a noticeable thermolysis only from temperatures above 2,000 ° C. In the presence of catalytically active materials, however, the thermolysis can also take place at 900 ° C. by lowering the activation energy for the purpose of thermolysis. The thermolysis produces oxyhydrogen, ie a hydrogen (H 2 ) - oxygen (0 2 ) mixture.
  • This blast gas is passed through the preheated hot air 120 which enters the rotary kiln housing 10 through a conduit 125 is strongly diluted and blown into the area of the flame 30 of the burner lance 25.
  • the oxyhydrogen gas can also react again to water, as in a oxyhydrogen flame, or it can use the fuel to undergo a complex series of redox reactions as a combustion reaction. Since the gas in the rotary kiln 25 is very hot due to the flame 30 of the burner lance 25, the heat absorbed by the evaporation of the cooling water is not returned to the process by recuperation.
  • the water vapor present in the area of the rotary kiln 15 between the rotary kiln furnace head 40 and the flame 30 displaces the atmospheric and cold air present from the outside of the cooler.
  • the water vapor here forms a barrier between the reductive flame exhaust gases set by the combustion guide in the flame 30, which are deeper in the rotary kiln, and the atmospheric air in the clinker cooler 20.
  • the hot air 120 supplied through the line 125 is already by the preheating with a corresponding flame oxygen poor and flows through the thermals in the rotary kiln 15, especially at the top of the rotary kiln 15 in the rotary kiln 15 inside. A portion of the heated hot air 120 flows as tertiary air 85 into the tertiary air duct 90.
  • FIG. 3 shows an embodiment of the plant for the production of cement clinker for the further production of white cement is shown, in which in addition to the features shown in Figure 2 a line for radiator exhaust air 1 1 1 is provided seen, which comes from the rear of a clinker cooler ,
  • This air has a temperature between about 100 ° C and 150 ° C and is brought by a hot gas generator 1 12 to a temperature of about 300 ° C to 350 ° C and fed as heated radiator exhaust air 1 13 of the primary air 105 ,
  • the supply of the heated radiator exhaust air 1 13 of the primary air can be supplied directly or else be flowed into the burner lance housing, where it mixes with the flame at the end of the housing.
  • the additional feed of the heated radiator exhaust air 1 13 in the primary air of Brennrs has the technical advantage that the vapors can be withdrawn from the rotary kiln, without the withdrawn air volume reduces the necessary carrier air for a calciner following the rotary kiln.
  • Rotary kiln furnace head 110 pipe (cooling water) Cement clinker 111 Cooler exhaust air

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Abstract

L'invention concerne une installation pour la production de clinker de ciment destiné à la production ultérieure de ciment blanc, présentant un four tubulaire rotatif (15) pour le frittage de farine crue (35) contenant de la chaux et du silicate et le cas échéant d'autres oxydes pour donner du clinker de ciment (45), une lance de brûleur (25) étant présente sur la tête (40) du four tubulaire rotatif (15) pour la génération de la température de frittage nécessaire dans le four tubulaire rotatif (15) et ladite lance de brûleur (25) rentrant à l'intérieur du four tubulaire rotatif (15), et au moins une conduite (110) pour guider de l'eau de refroidissement (110) dans le four tubulaire rotatif (15) pour la trempe du clinker de ciment (45) fritté encore présent dans le four tubulaire rotatif (15). Selon l'invention, la lance de brûleur (25) présente la ou les conduites (110) pour le guidage de l'eau de refroidissement, la conduite (110) pour le guidage de l'eau de refroidissement débouchant dans la zone située entre l'embouchure du brûleur et l'extrémité de la tête deu four tubulaire rotatif (40) et pulvérisant l'eau de refroidissement sur le clinker de ciment (45) fritté. L'intégration de la lance de brûleur à la conduite d'eau de refroidissement permet de refroidir simultanément la lance de brûleur et de contrôler plus facilement les conditions réductrices dans le four tubulaire rotatif lors de la trempe.
PCT/EP2019/058168 2018-04-13 2019-04-01 Installation et lance de brûleur pour la production ultérieure de ciment blanc WO2019197195A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19716842.0A EP3775742B1 (fr) 2018-04-13 2019-04-01 Installation et lance de bruleur pour la production ulterieure de ciment blanc
DK19716842.0T DK3775742T3 (da) 2018-04-13 2019-04-01 Anlæg og brænderlanse til yderligere fremstilling af hvid cement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018108802.7 2018-04-13
DE102018108802.7A DE102018108802B3 (de) 2018-04-13 2018-04-13 Anlage zur wahlweisen Herstellung von Zementklinker für grauen oder weißen Zement

Publications (1)

Publication Number Publication Date
WO2019197195A1 true WO2019197195A1 (fr) 2019-10-17

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PCT/EP2019/058168 WO2019197195A1 (fr) 2018-04-13 2019-04-01 Installation et lance de brûleur pour la production ultérieure de ciment blanc

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EP (1) EP3775742B1 (fr)
DE (1) DE102018108802B3 (fr)
DK (1) DK3775742T3 (fr)
WO (1) WO2019197195A1 (fr)

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DE102021210662A1 (de) 2021-09-24 2023-03-30 Benninghoven Zweigniederlassung Der Wirtgen Mineral Technologies Gmbh Vorrichtung und Verfahren zum Trocknen von Material sowie Asphaltmischanlage mit einer derartigen Vorrichtung

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DE1178769B (de) 1960-09-27 1964-09-24 Smidth & Co As F L Verfahren und Vorrichtung zum Brennen von weissem Zement in einem Drehrohrofen
US3506250A (en) 1968-09-23 1970-04-14 Smidth & Co As F L Rotary kiln and method for manufacture of white cement
DE2041834A1 (de) 1970-02-09 1972-01-20 Lafarge Ciments Sa Vorrichtung zur Herstellung von weissem Zement
DE2544343B2 (de) 1974-10-03 1981-08-06 F.L. Smidth & Co. A/S, Koebenhavn Verfahren zur Herstellung von weißem Zement und Anlage zur Durchführung des Verfahrens
US4461465A (en) 1980-02-11 1984-07-24 Exxon Research And Engineering Co. Facsimile sheet feeding apparatus
DE3521587C1 (de) 1985-06-15 1989-02-02 O & K Orenstein & Koppel Ag, 1000 Berlin Verfahren und Anlage zur Herstellung von weißem Zement
US6228143B1 (en) * 2000-01-18 2001-05-08 The International Metals Reclamation Company, Inc. Rotary thermal oxidizer for battery recycling and process
US20050284347A1 (en) * 2004-06-29 2005-12-29 Cemex Inc. Method of reducing cement kiln NOx emissions by water injection
EP1932929A1 (fr) * 2005-10-05 2008-06-18 JFE Material Co., Ltd. PROCÉDÉ DE GRILLAGE DE MATIÈRE CONTENANT V, Mo ET Ni, ET FOUR ROTATIF POUR LE GRILLAGE DE MATIÈRE CONTENANT V, Mo ET Ni
EP2626628A1 (fr) * 2012-02-09 2013-08-14 Linde Aktiengesellschaft Installation de chauffe d'un four rotatif

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US3074705A (en) 1960-09-27 1963-01-22 Smidth & Co As F L Rotary kiln and method of burning material therein
DE19622591A1 (de) 1996-06-05 1997-12-11 Heidelberger Zement Ag Verfahren zur stofflichen und thermischen Nutzung von Wasser, Mineralien und brennbare Anteile enthaltenden Reststoffen für die Herstellung von Portlandzementklinker

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Publication number Priority date Publication date Assignee Title
DE1178769B (de) 1960-09-27 1964-09-24 Smidth & Co As F L Verfahren und Vorrichtung zum Brennen von weissem Zement in einem Drehrohrofen
US3506250A (en) 1968-09-23 1970-04-14 Smidth & Co As F L Rotary kiln and method for manufacture of white cement
DE2041834A1 (de) 1970-02-09 1972-01-20 Lafarge Ciments Sa Vorrichtung zur Herstellung von weissem Zement
DE2544343B2 (de) 1974-10-03 1981-08-06 F.L. Smidth & Co. A/S, Koebenhavn Verfahren zur Herstellung von weißem Zement und Anlage zur Durchführung des Verfahrens
US4461465A (en) 1980-02-11 1984-07-24 Exxon Research And Engineering Co. Facsimile sheet feeding apparatus
DE3521587C1 (de) 1985-06-15 1989-02-02 O & K Orenstein & Koppel Ag, 1000 Berlin Verfahren und Anlage zur Herstellung von weißem Zement
US6228143B1 (en) * 2000-01-18 2001-05-08 The International Metals Reclamation Company, Inc. Rotary thermal oxidizer for battery recycling and process
US20050284347A1 (en) * 2004-06-29 2005-12-29 Cemex Inc. Method of reducing cement kiln NOx emissions by water injection
EP1932929A1 (fr) * 2005-10-05 2008-06-18 JFE Material Co., Ltd. PROCÉDÉ DE GRILLAGE DE MATIÈRE CONTENANT V, Mo ET Ni, ET FOUR ROTATIF POUR LE GRILLAGE DE MATIÈRE CONTENANT V, Mo ET Ni
EP2626628A1 (fr) * 2012-02-09 2013-08-14 Linde Aktiengesellschaft Installation de chauffe d'un four rotatif

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Title
BLANCO-VARELA ET AL., ADV. IN CEMENT RESEARCH, vol. 9, no. 35, July 1997 (1997-07-01), pages 105 - 113

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EP3775742A1 (fr) 2021-02-17
DE102018108802B3 (de) 2019-09-12
DK3775742T3 (da) 2023-10-16
EP3775742B1 (fr) 2023-07-12

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