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Cement presintering production method and system

A production method and pre-sintering technology, applied in cement production, clinker production, lighting and heating equipment, etc., can solve the problem of high power consumption, improve clinker quality, increase cement output, and reduce grinding power consumption Effect

Active Publication Date: 2008-03-12
CHINA BUILDING MATERIALS ACAD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, boiling calcination requires a high air velocity to maintain a fluidized state, and it takes a long time to complete the solid state and sintering reactions, which consumes a lot of electrical energy

Method used

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  • Cement presintering production method and system
  • Cement presintering production method and system

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Embodiment Construction

[0016] The technical route of the present invention is to increase the temperature of the material entering the kiln from 900°C to about 1100°C (950-1250°C) in the existing preheating subsystem, that is, to increase the temperature of the material entering the kiln by about 200°C or higher, eliminating the need for cement The heat transfer "bottleneck" of the rotary kiln realizes the rapid firing of cement clinker in the rotary kiln with zero heat consumption or even negative heat consumption, so as to achieve the goals of increasing production, saving energy and improving clinker quality.

[0017] First, the present invention should provide the heat required for the decomposition of residual carbonate in the rotary kiln and the even exothermic reaction temperature of the kiln material. The carbonate decomposition rate of the cement precalcining kiln feed into the kiln is only 90%, and the remaining 10% carbonate still needs to be decomposed in the rotary kiln. It can be seen ...

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Abstract

The present invention relates to a new cement manufacturing technology. By enhancing the temperature of the kiln feed of a rotary kiln, the inefficient heat transfer process remaining in the cement rotary kiln is greatly reduced or eliminated and the thermal bottle-neck problem in the cement calcinations is solved so as to realize the fast firing of the fine particles and highly efficient cooling of the clinkers, and the anti-skinning materials, high temperature resistant materials and insulating materials are adopted and the aspect ratio, rotation speed and slope of the rotary kiln are changed so as to realize the present invention, thus generating the very obvious comprehensive effects of enhancing the output of the cements, lowering the burning heat consumption and the grinding pow consumption and enhancing the clinker quality.

Description

Technical field: [0001] The invention relates to the field of cement production, in particular to a novel cement production method which significantly increases cement output and significantly reduces firing heat consumption. Background technique: [0002] In cement manufacturing, the traditional rotary kiln sprays fuel from the kiln head, feeds raw material into the kiln tail, and realizes the firing of cement through heat exchange between the kiln gas and the kiln material flowing in the opposite direction. Because the materials in the kiln are piled up, the formation of clinker requires a lot of heat, which makes the heat transfer efficiency of the rotary kiln very low, the heating process of the kiln material is very slow, and the output of the cement rotary kiln is very low. The amount of exhaust gas and the kiln shell are large, and the heat carried out by the exhaust gas and the heat loss from the surface of the kiln shell are also very large, resulting in low output ...

Claims

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Application Information

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IPC IPC(8): C04B7/44F27B7/20F27B7/22F27D1/00F27D1/04F27D3/00C04B35/66
CPCC04B7/43Y02P40/121
Inventor 汪澜王杰曾佟贵山谢吉优
Owner CHINA BUILDING MATERIALS ACAD
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