WO2008097123A1 - Procédé de production de clinker fondu utilisant un laitier métallurgique en fusion (variantes) - Google Patents

Procédé de production de clinker fondu utilisant un laitier métallurgique en fusion (variantes) Download PDF

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Publication number
WO2008097123A1
WO2008097123A1 PCT/RU2007/000367 RU2007000367W WO2008097123A1 WO 2008097123 A1 WO2008097123 A1 WO 2008097123A1 RU 2007000367 W RU2007000367 W RU 2007000367W WO 2008097123 A1 WO2008097123 A1 WO 2008097123A1
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WO
WIPO (PCT)
Prior art keywords
clinker
mixture
slag
melting chamber
melt
Prior art date
Application number
PCT/RU2007/000367
Other languages
English (en)
Russian (ru)
Inventor
Sergey Viktorovich Lasankin
Original Assignee
Sergey Viktorovich Lasankin
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 Sergey Viktorovich Lasankin filed Critical Sergey Viktorovich Lasankin
Publication of WO2008097123A1 publication Critical patent/WO2008097123A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/14—Cements containing slag
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
    • C04B7/42—Active ingredients added before, or during, the burning process
    • C04B7/421—Inorganic materials
    • C04B7/422—Elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

Definitions

  • the present invention relates to the production of cement clinker using flame-liquid metallurgical slag.
  • the disadvantage of this method is the poor process control, i.e. lack of sampling and corrective measures in the preparation of clinker. This is very important, since the chemical composition of metallurgical slag varies from smelting to smelting, depending on the grade composition of the smelted metal.
  • calcination of limestone is carried out in the upper part of the melting chamber on a grate, which leads to increased heat consumption, because the decarbonization reaction is endothermic, and it goes with the absorption of heat in the same chamber.
  • the next disadvantage of this method is the lack of measures aimed at extracting a metal component from metallurgical slag.
  • the main factor restraining the use of metallurgical slag in the production of cements is the presence of metal in them [Fomichev H. A., Heat-resistant concrete based on metallurgical slag. Publishing house of construction literature. Moscow - 1972].
  • metal particles (kings) settle in a more viscous slag and are carried out together with it from the melting unit. The volume of these losses depends on the density of the smelted metal, slag viscosity, melting technology, etc. For example, in the production of steel, the content of such metallic inclusions reaches 20% by mass [Fomichev H. A., Heat-resistant concrete on based metallurgical slag. Publishing house of construction literature. Moscow - 1972].
  • the objective of the invention is to propose a method for the production of fused clinker using fire-liquid metallurgical slag, eliminating the above disadvantages.
  • the problem is solved in that in the method for producing fused cement clinker using fire-liquid metallurgical slag according to the first embodiment, which includes pouring slag into the melting chamber, introducing lime into the melt and smelting the clinker mixture by bringing the resulting mass to a fluid state by burning the fuel mixture, according to According to the invention, the clinker mixture is melted with its mixing using the axial rotation of the body of the melting chamber, while the release of a fluid clinker is carried out after For sampling, by tilting the melting chamber, during which the fiery-liquid metal phase collected in the bottom layer of the melt is separated, and the clinker obtained is granulated, and at the final stage, the metal particles remaining in the clinker are extracted by air separation after grinding the granules in a roller mill.
  • lime obtained by calcining limestone in a furnace heated by hot gases leaving the melting chamber or in case of their deficiency, burning a mixture of blast furnace and natural gas, or gases obtained in the process of metallurgical production.
  • the fuel mixture should be enriched with oxygen.
  • an additive containing silicon oxide can be added to the melt along with lime.
  • Clinker granulation can be carried out by breaking the mass of clinker with pre-chilled water by rotating blades in the air stream.
  • the problem is also solved by the method of producing a fused cement clinker using fire-liquid metallurgical slag according to the second embodiment, including pouring slag into the melting chamber, introducing lime into the melt and smelting the clinker mixture by bringing the resulting mass to a fluid state by burning a fuel mixture, in which according to the invention the melting of the clinker mixture is combined with its mixing using the axial rotation of the body of the melting chamber, while the release of fluid clinker is produced after sampling by tilting the melting chamber, during which the fiery-liquid metal phase collected in the bottom layer of the melt is separated, the clinker obtained is granulated and, at the final stage, the metal particles remaining in the clinker are extracted by air separation after grinding the granules in a roller mill, use lime obtained by calcining limestone in a second melting chamber, which is heated by the flu
  • clinker granulation is carried out with compressed air with the introduction of a dust fraction carried away from the melting chamber and the kiln.
  • a melting chamber made in the form of a converter having two axes of rotation.
  • the first axis of rotation coincides with the axis of symmetry of the melting chamber (longitudinal), and the second axis is perpendicular to the axis of symmetry (transverse).
  • Each technological operation - pouring fire-liquid slag, heating the mixture, sampling and releasing the finished clinker - corresponds to a certain angle of rotation of the melting chamber around the transverse axis of rotation.
  • the melting chamber is installed in a vertical position, and for heating, it is tilted at a certain angle so that a lance and a hood enter the neck.
  • the melting chamber is moved to a horizontal position, and to release the finished clinker, it is turned over so that the neck is below the horizon.
  • limestone calcination is carried out in a special furnace heated by hot gases leaving the melting chamber.
  • the kiln will cool down, as fuel burning at this moment does not occur.
  • it is additionally heated by burning a mixture of blast furnace and natural gas.
  • the lime kiln can be heated by gases obtained in the metallurgical production process (coke oven, blast furnace, etc.).
  • the limestone kiln is placed above the melting chamber so that the lime formed in the kiln by gravity is fed into the melt in small portions through a metering hopper and hood.
  • a second (identical to the first) melting chamber is used as a kiln, and it is arranged symmetrically, so that the furnace gases after leaving the neck of the first chamber fall into the neck of the second, where limestone is currently being calcined. After the clinker is discharged from the first chamber, limestone is loaded into it for calcination, and fiery-liquid slag is poured into the chamber with already calcined limestone to melt the clinker.
  • This firing scheme involves the production of lime due to the heat of previously conducted heats. Therefore, in special cases of using this method for the first smelting, lime is obtained by calcining limestone directly in a heated melting chamber. After introducing the required amount of additional materials into the melt, it is brought to a fluid state, the fuel supply is stopped and the axial rotation of the melting chamber is turned off. Before the clinker is released, samples are taken. To do this, a tuyere is removed from the melting chamber, a hood is removed, and the chamber is moved to a horizontal position. After sampling and rapid analysis, a decision is made to release clinker or conduct corrective measures.
  • Clinker is released into the intermediate granulator bucket by lowering the neck of the melting chamber below the horizon.
  • a significant amount of metal is found in metallurgical slag.
  • the densest metal phase will move to the lower layer of the melt.
  • the clinker With a smooth increase in the angle of inclination, the clinker will first leave the neck. The release of metal will occur at a greater degree of the angle of inclination of the melting chamber than the clinker.
  • a cut-off device is installed, with the help of which that part of the metal which, under the action of gravity was in the lower layer of the melt, is taken from the melt.
  • the fiery-liquid clinker from the intermediate ladle enters the granulator through a special channel.
  • the melt is cooled with water to prevent sticking of the molten mass of clinker on the working parts of the granulator.
  • the underlying material is broken by the granulator blades into granules, which are cooled by air passing through the granulator body. This combined cooling method allows you to have sufficiently low clinker moisture after the granulator, which ensures high quality of the final product.
  • clinker granulation can be carried out using compressed air, to which dust added from the smelter and kiln is added.
  • This method requires additional costs for the installation of compressor stations and dispensers, but it is more environmentally friendly, since it avoids the release of hydrogen sulfide formed as a result of the interaction of sulfur contained in slag with hydrogen from water vapor, and also allows you to adjust the chemical composition of the clinker during the granulation process.
  • the granules are crushed in a roller mill.
  • the smallest non-metallic component of the mixture (clinker) is crushed, while metal particles are not destroyed.
  • metal particles are separated from the crushed and less dense clinker.
  • the use of the method to accelerate the clinker smelting process in the melting chamber increases the oxygen content in the fuel mixture.
  • fuel burns out with heated air. If it is necessary to accelerate the melting process, then the combustion temperature of the fuel is increased, replacing the air with oxygen in the mixture. The more you need to speed up the process, the more oxygen is added to the mixture.
  • This adjustment is very important for the coordinated operation of a metallurgical furnace and a slag smelter. It is important that the melting time clinker corresponded to the period of slag discharge from the metallurgical furnace.
  • the melting chamber will not stand idle for a long time (cool down), its lining will work in a more sparing mode, and the fire-liquid slags released by their metallurgical furnace will not cool down in anticipation of their turn for processing.
  • Table 1 The chemical composition of blast furnace slag.
  • Table 2 The composition of the raw mix for the production of 20 tons of processed clinker.
  • the melting chamber is installed in a vertical position.
  • the slag is poured using a pouring ladle using an overhead crane.
  • the limestone kiln is heated by burning a mixture of blast furnace and natural gas in air.
  • the chamber is turned into an inclined position, a tuyere is inserted through the neck, a hood apron is brought in and the axial rotation drive of the melting chamber is turned on.
  • the calculated amount of lime calcined during the previous smelting is fed in small portions from the hopper through a hood in small portions.
  • the furnace is heated with exhaust gases from the melting chamber.
  • Clinker oven treatment time is 18 minutes.
  • Clinker temperature t cells 1750 0 C.
  • Clinker is released into the intermediate granulator bucket by lowering the neck of the melting chamber below the horizon.
  • the angle of inclination When adjusting the angle of inclination, the lightest non-metallic component of the melt is released.
  • 310 kilograms of metal were taken into a special mold.
  • the limestone kiln is heated by burning in air a mixture of blast furnace and natural gas.
  • the fire-liquid clinker from the intermediate ladle is fed into a granulator, where it is cooled and broken into granules of 3-6 mm in size.
  • the moisture content of the material was 5%.
  • the granules are crushed in a roller mill and subjected to air separation. As a result, 210 kilograms of the metal fraction (+0.1 mm) and 19.2 tons of clinker fraction (-0.1 mm) were extracted.
  • Flame-liquid blast furnace slag and fire-liquid steelmaking slag are fed from the corresponding shops of the metallurgical plant with chemical analysis data. Table 4. The chemical composition of metallurgical slag.
  • the composition of the clinker mixture for smelting 20 tons of clinker is determined, which is shown in table 5.
  • Table 5 The composition of the raw mix to obtain 20 tons of processed clinker.
  • the melting chamber is installed in a vertical position.
  • the slag is poured using a pouring bucket using overhead crane.
  • the limestone kiln is heated by burning coke oven gas in the air.
  • the chamber After pouring the slag, the chamber is turned into an inclined position, a tuyere is inserted through the neck, a hood apron is brought in and the axial rotation drive of the melting chamber is turned on.
  • the calculated amount of lime calcined during the previous smelting is fed in small portions from the hopper through a hood in small portions.
  • the furnace is heated with exhaust gases from the melting chamber.
  • Clinker oven treatment time is 16 minutes.
  • the axial rotation drive Before releasing the clinker, the axial rotation drive is turned off to allow the heavier metal phase to sink to the bottom of the melting chamber. After disconnecting the duct and removing the lance, the camera is rotated to a horizontal position for sampling the clinker. Express analysis data are shown in table 6.
  • Clinker temperature t cells 1740 0 C.
  • Clinker is released into the intermediate granulator bucket by lowering the neck of the melting chamber below the horizon. By adjusting the angle of inclination, produce clinker. With the help of a cutter installed in the place where the edge of the neck of the melting chamber should come when metal starts to come out of it, 950 was taken into a special mold kilograms of metal. At the time when clinker is cast, the limestone kiln is heated by burning coke oven gas.
  • the fiery liquid clinker from the intermediate ladle is fed into the granulator, where it is cooled and broken into granules of 3-6 mm in size.
  • the moisture content of the material was 5%.
  • the granules are crushed in a roller mill and subjected to air separation. As a result, 370 kilograms of the metal fraction +0.1 mm and 18.3 tons of clinker fraction -0.1 mm were extracted.
  • other materials containing this oxide are used instead of blast furnace slag to increase the content of (ClO 2 ) in the clinker mixture.
  • quartz-ferruginous sand formed during the enrichment of iron ore and containing at least 55% silica. It is introduced into the melting chamber through a metering hopper together with lime.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

La présente invention concerne un procédé de production de clinker utilisant un laitier métallurgique en fusion. Le procédé de cette invention consiste à verser un laitier dans une chambre de fusion, à injecter de la chaux dans une masse fondue et à faire fondre le mélange de clinker par combustion d'un mélange de combustible jusqu'à ce qu'il passe à l'état liquide. La fusion du mélange de clinker est associée à son agitation par rotation axiale du corps de la chambre de fusion. L'évacuation du clinker fluide et la séparation de la phase métallique en fusion sont réalisées, après prélèvement d'échantillons, par inclinaison de la chambre de fusion. Le clinker ainsi obtenu est réduit en granules, après quoi les granules sont broyés dans un broyeur à cylindre et les particules métalliques restant dans le clinker sont extraites par séparation à l'air. De la chaux peut être produite par combustion de calcaire dans une deuxième chambre de fusion chauffée par les gaz de combustion sortant de la première chambre de fusion. Cette invention permet de commander un processus par prélèvement d'échantillons et prise de mesures de correction au cours de la préparation de clinker, de réduire la consommation de chaleur et d'extraire un composant métallique de laitiers métallurgiques.
PCT/RU2007/000367 2007-02-08 2007-07-03 Procédé de production de clinker fondu utilisant un laitier métallurgique en fusion (variantes) WO2008097123A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2007104717 2007-02-08
RU2007104717/03A RU2007104717A (ru) 2007-02-08 2007-02-08 Способ получения плавленного цементного клинкера

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WO2008097123A1 true WO2008097123A1 (fr) 2008-08-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113912021A (zh) * 2021-11-16 2022-01-11 上海驰春节能科技有限公司 工业副产品石膏协同冶金渣熔液生产硫磺联产水泥熟料的系统及工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU62688A1 (ru) * 1939-04-23 1942-11-30 Н.И. Ивановский Печь дл передела и подготовки шлаков
SU423849A1 (ru) * 1972-12-19 1974-04-15 В. И. Вельский, Ю. А. Нарышкин , А. Г. Помещиков Вакуумная плавильная печь
SU1504277A1 (ru) * 1987-04-13 1989-08-30 Московский институт стали и сплавов Способ переработки сталеплавильных шлаков
US5374309A (en) * 1993-02-26 1994-12-20 Blue Circle America, Inc. Process and system for producing cementitious materials from ferrous blast furnace slags
RU96107143A (ru) * 1996-04-09 1998-07-20 Акционерное общество "Алапаевский металлургический завод" Способ получения абразивного материала из металлургического шлака
RU2196116C2 (ru) * 2000-07-11 2003-01-10 ООО Научно-экологическое предприятие "Экоси" Способ получения плавленого цементного клинкера

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU62688A1 (ru) * 1939-04-23 1942-11-30 Н.И. Ивановский Печь дл передела и подготовки шлаков
SU423849A1 (ru) * 1972-12-19 1974-04-15 В. И. Вельский, Ю. А. Нарышкин , А. Г. Помещиков Вакуумная плавильная печь
SU1504277A1 (ru) * 1987-04-13 1989-08-30 Московский институт стали и сплавов Способ переработки сталеплавильных шлаков
US5374309A (en) * 1993-02-26 1994-12-20 Blue Circle America, Inc. Process and system for producing cementitious materials from ferrous blast furnace slags
RU96107143A (ru) * 1996-04-09 1998-07-20 Акционерное общество "Алапаевский металлургический завод" Способ получения абразивного материала из металлургического шлака
RU2196116C2 (ru) * 2000-07-11 2003-01-10 ООО Научно-экологическое предприятие "Экоси" Способ получения плавленого цементного клинкера

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BUTT J.M. ET AL.: "Tekhnologya vekuschikh veschetv", M., VYSCHAYA SHKOLA, 1964, pages 563 - 575 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113912021A (zh) * 2021-11-16 2022-01-11 上海驰春节能科技有限公司 工业副产品石膏协同冶金渣熔液生产硫磺联产水泥熟料的系统及工艺
CN113912021B (zh) * 2021-11-16 2022-12-20 上海驰春节能科技有限公司 工业副产品石膏协同冶金渣熔液生产硫磺联产水泥熟料的系统及工艺

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