Technique of fluidized instant calcinations of kaolin in coal series

A technology of coal-based kaolin and calcination process, which is applied in the direction of clay products, aluminum silicate, silicate, etc., can solve the problems of long production process route, difficulty in large-scale equipment, shortening calcination time, etc., to increase the output of a single unit, The effect of reducing energy consumption and shortening the whitening time of calcination

Inactive Publication Date: 2007-02-21
内蒙古蒙西高岭粉体股份有限公司
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Problems solved by technology

[0009] The purpose of the present invention is to overcome the shortcomings of the existing fluidized calcination process, such as too long material residence time, serious material back-mixing, difficult large-scale equipment, long and very complicated production process route, and provide a simple production process. , a method that can instantly remove most of the structural water and some carbon impurities in coal-measure kaolin, and shorten the calcination time required in the subsequent ordinary calcination whitening process, and at the same time improve the oil absorption value, hiding contrast ratio and extinction performance of the final product

Method used

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  • Technique of fluidized instant calcinations of kaolin in coal series

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Experimental program
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Embodiment 1

[0037] Such as figure 1 As shown, what the flue gas generation system 3 adopts is an industrially used hot blast stove. First, ignite the nozzle 2 of the burner 1 in the hot blast stove to heat the system. After the temperature at the junction of the calcination pipe 7 and the material spreading device 6 in the fluidized calcination system is stabilized at about 850°C, comprehensively adjust the air inlet of the induced draft fan 10 The damper 17 installed on the top and the butterfly valve 16 on the cold air pipe 12 between the bag filter 9 and the induced draft fan 10 and the butterfly valve 16 on the cold air pipe 11 on the pipeline connecting the cyclone dust collector 8 and the bag filter 9 15, so that the wind speed of the system is about 15m / s, and then open the airlock discharge device 5 on the discharge port of the silo 4 to add the 1250-mesh coal-based kaolin raw powder in the silo 4 and pass the material through the dispersing device 6. After being dispersed, it en...

Embodiment 2

[0039]The calcination temperature in Example 1 is controlled at about 850°C, the wind speed of the system is controlled at about 30m / s, and the rest are the same as in Example 1 to obtain semi-finished products B and finished products B respectively.

Embodiment 3

[0041] The calcination temperature in Example 1 is controlled at about 920°C, the wind speed of the system is controlled at about 40m / s, and the rest are the same as in Example 1 to obtain semi-finished products C and finished products C respectively.

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Abstract

This invention relates to a fluid-state instantaneous calcining technique for calcining kaolin. The technique comprises a flue gas generating system, a loading system, a fluid-state calcining system, a gas-solid separating system and a post-calcining system. The material is loaded into the fluid-state calcining system by the loading system, where it is mixed with high-temperate flue gas flow generated by the flue gas generating system for instantaneous calcining. The calcined material is introduced into the gas-solid separating system, and the collected solid is then introduced to the post-calcining system for whitening treatment. The instantaneous calcining time is adjusted by the valve. The method can realize large-scale and continuous industrial manufacture, and can effectively reduce the time and energy consumption of post-calcining whitening treatment. The calcined kaolin product has improved oil-absorbency, hiding contrast rate and light extinction performance.

Description

technical field [0001] The invention relates to a material calcination method, in particular to a fluidized instant calcination process of coal series kaolin. Background technique [0002] Coal-series kaolin is a kind of mineral specially produced in my country. After being crushed to a certain fineness, it can be used as a pigment and filler for papermaking, coatings, and rubber and plastic products after being calcined to dehydrate and decarbonize to improve whiteness. Chemical Products. The above-mentioned application fields all require kaolin to have the highest possible whiteness and hiding contrast ratio and proper oil absorption value after calcination. However, because coal-measure kaolin contains structural water and carbon impurities, it must be calcined, dehydrated and decarbonized to meet the requirements of downstream applications for whiteness, opacity and contrast ratio and oil absorption value. At the same time, it is required that the calcination technology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/26C04B33/04C09C1/42
Inventor 刘埃林叶向东杨永成冯欲晓高鹏军任永利宋勇平冯利民包铁刚苏咏张利云祖吉喆卢自尊王建东季铁刚
Owner 内蒙古蒙西高岭粉体股份有限公司
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