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Technical method for stably reducing coal consumption of cement clinker firing

A technology of cement clinker and coal consumption, applied in cement production, etc., can solve the problem of high coal consumption, achieve the effects of reducing production costs, significant economic benefits, and reducing process technology

Inactive Publication Date: 2020-06-09
攀枝花瑞峰水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a technical method for stably reducing coal consumption in cement clinker firing, which has the advantage of effectively reducing coal consumption and solves the problem of high coal consumption in cement clinker firing technology

Method used

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  • Technical method for stably reducing coal consumption of cement clinker firing
  • Technical method for stably reducing coal consumption of cement clinker firing
  • Technical method for stably reducing coal consumption of cement clinker firing

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Embodiment 1

[0019] see figure 1 , the present invention provides a technical method for stably reducing the coal consumption of cement clinker firing. Medium silica rock and silica with good burnability are used to replace high silica rock with poor grindability and burnability; industrial waste yellow phosphorus slag is mixed as mineralizer; fly ash is used to improve the burnability of raw meal.

[0020] 1) Conduct a full chemical analysis of all raw material components in raw meal ingredients. The main raw materials are: limestone, high silica rock, medium silica rock, silica, yellow phosphorus slag, converter slag, fly ash, etc.

[0021] 2) Design ideas: Use medium silica rock and silica with better combustibility to replace high silica rock with poor combustibility, mix industrial waste yellow phosphorus slag as mineralizer, and design different raw material formulas to verify the combustibility of raw materials.

[0022] Table 2-1 Chemical Composition of Raw Materials (%)

[0023...

Embodiment 2

[0035] see figure 1 , the present invention provides a technical method for stably reducing the coal consumption of cement clinker firing. Recovery efficiency; optimize the structure of the grate plate and the control of the grate cooler to improve the efficiency of heat recovery; expand the diameter of the air supply pipe of the inflatable beam to increase the air volume and improve the efficiency of heat recovery.

[0036] Table 3-1 Optimization of Fan Configuration of Grate Cooler

[0037]

[0038]

[0039] Expand the diameter of the connecting pipe between the fan and the inflatable beam pipe from the original Ф108㎜ to Ф168㎜, and eliminate the turbulent flow area of ​​the bellows, so as to reduce the pipe resistance and increase the air volume.

Embodiment 3

[0041] see figure 1 , the present invention provides a technical method for stably reducing the coal consumption of cement clinker firing. Oxygen content at the outlet of device C1; use a new flap valve to reduce internal air leakage, and the sealing device at the kiln tail is transformed from a cylinder seal to a graphite seal to reduce external air leakage; use a new type of spreading box to increase the dispersion of materials in the calciner and preheater, thereby improving Heat exchange efficiency; optimize the position of the furnace coal burner, use a new structure of the furnace coal burner, and improve the combustion efficiency and burnout rate of pulverized coal.

[0042] After optimization, the secondary air temperature is stable at 1200±25°C, and the tertiary air temperature is stable at 1050±20°C. The level of the secondary air temperature and the tertiary air temperature is a key indicator parameter reflecting the heat recovery efficiency of the system. Through...

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Abstract

The invention discloses a technical method for stably reducing coal consumption of cement clinker firing, which comprises the following steps of: high-silicon rock is replaced with medium-silicon rockand silica by adjusting a raw material proportioning scheme; industrial waste yellow phosphorus slag is blended as a mineralizing agent; fan configuration of a grate cooler is optimized, quenching isenhanced, and the heat recovery efficiency is improved; a grate plate structure and grate cooler control are optimized, and the heat recovery efficiency is improved; a pipe diameter of the inflatablebeam air supply pipeline is enlarged, the air volume is increased, and the heat recovery efficiency is improved; through system air leakage treatment, the oxygen content of an outlet of a preheater C1 is reduced; a novel flap valve is used for reducing internal air leakage, and a kiln tail sealing device is modified from cylinder sealing to graphite sealing to reduce external air leakage; a novelspreading box is used for improving the dispersity of materials in a decomposing furnace and a preheater, so that the heat exchange efficiency is improved; the position of the furnace coal burner isoptimized, and the combustion efficiency and the burn-off rate of pulverized coal are improved by using the furnace coal burner with a novel structure. By implementing the method, the production costof the cement clinker is greatly reduced, and remarkable economic benefits are obtained.

Description

technical field [0001] The invention relates to the technical field of reducing coal consumption in cement clinker firing, in particular to a technical method for stably reducing coal consumption in cement clinker firing. Background technique [0002] Macro statistics show that thermal power, iron and steel, building materials and chemical industries are the four major industries directly downstream of the coal industry, and their total raw coal consumption accounts for more than 80%. Among them, the coal consumption of the building materials industry accounts for about 14% of coal consumption, while the coal consumption of the cement industry accounts for about 70% of the coal consumption of the building materials industry. Its production mainly uses coal as fuel and electricity as the driving force, and rarely uses other fuels. In the face of coal, a non-renewable mineral resource, it is of great strategic significance for the cement industry to reduce coal consumption and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/26C04B7/44C04B7/47C04B7/43
CPCC04B7/24C04B7/26C04B7/43C04B7/44C04B7/475Y02P40/10
Inventor 秦秀伟于天勇
Owner 攀枝花瑞峰水泥有限公司
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