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A method for improving the dehydration efficiency of kaolin slurry

A kaolin and mineral pulp technology, applied in separation methods, chemical instruments and methods, precipitation separation, etc., can solve the problems of difficult dehydration and long dehydration time, and achieve the effects of reducing suspension, increasing production capacity, and shortening filter press dehydration time.

Active Publication Date: 2021-02-05
中国高岭土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly aims at the pulp produced by soft kaolin during wet beneficiation, and provides a method for improving the dehydration efficiency of kaolin pulp, which solves the problem that the dehydration time of the above-mentioned type of kaolin is long and difficult to dehydrate during press filtration

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  • A method for improving the dehydration efficiency of kaolin slurry
  • A method for improving the dehydration efficiency of kaolin slurry

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Embodiment 1

[0025] Embodiment 1: A method for improving the dehydration efficiency of kaolin slurry

[0026] The method in turn includes the following steps:

[0027] The first step is to hydrate the raw kaolin ore into raw pulp, and then classify the raw pulp through a hydrocyclone with a diameter of 75 mm to obtain a pulp. The mass concentration of the pulp is 15%~20%, and the viscosity of the pulp is less than 1000mPa. s, the laser particle size of kaolin in the slurry is 3.5 microns, and the microstructure is tubular;

[0028] The second step is to import the pulp into the pulp tank 1, stir the pulp, and then add calcium oxide to the pulp. The amount of calcium oxide added is 0.05% of the dry ore weight in the pulp. After stirring for 5-10 minutes quickly, the pH value of the pulp will increase. to 7.0~8.0; then, add polyacrylamide with a molecular weight of 12 million to the pulp, the amount of polyacrylamide added is 2 / 100000 of the weight of dry ore in the pulp, stir slowly for 2~...

Embodiment 2

[0035] Embodiment 2: A method for improving the dehydration efficiency of kaolin slurry

[0036] The method in turn includes the following steps:

[0037] The first step is to hydrate the raw kaolin ore into raw pulp, and then classify the raw pulp through a hydrocyclone with a diameter of 55 mm to obtain a pulp. The mass concentration of the pulp is 15%~20%, and the viscosity of the pulp is less than 1000mPa. s, the laser particle size of kaolin in the slurry is 3.0 microns, and the microstructure is segmented;

[0038] The second step is to import the pulp into the pulp tank, stir the pulp, and then add calcium oxide to the pulp. The amount of calcium oxide added is 0.03% of the dry ore weight in the pulp. After stirring for 5-10 minutes quickly, the pH value of the pulp rises to Between 7.0 and 8.0; then, add polyacrylamide with a molecular weight of 12 million to the pulp, the amount of polyacrylamide added is one millionth of the dry ore weight in the pulp, stir slowly f...

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Abstract

A method for improving the dehydration efficiency of kaolin pulp, which is characterized in that it includes the following steps: adding hydration to raw kaolin ore to form raw pulp to obtain pulp; introducing the pulp into a pulp pool, adding calcium oxide, and stirring quickly to increase the pH value of the pulp to 7.0~8.0; add polyacrylamide, stir slowly, and let it stand; the lower part of the slurry tank has a water outlet and a slurry outlet, and an external drainage device is provided in the slurry tank, which is composed of a floating ball and a hose. One end of the hose is It is connected with the floating ball, and the other end is connected with the water outlet; according to the buoyancy formula, the weight of the floating ball and the hose is equal to the buoyancy of the floating ball in the pulp; Then add aluminum sulfate, discharge the flocculated and precipitated pulp through the pulp outlet, and press filter to obtain the finished product. The invention improves the dehydration efficiency of the kaolin pulp by adding chemical agents and setting an external drainage device in the pulp tank, and greatly shortens the dehydration time of the filter press.

Description

technical field [0001] The invention relates to the field of deep processing of clay minerals, in particular to a method for improving the dehydration efficiency of kaolin pulp. The method is applied to the dehydration of the pulp in the kaolin processing production process. The method can greatly shorten the dehydration time of the kaolin pulp and increase the kaolin pulp. The capacity of the production process. Background technique [0002] Kaolin is a common and very important clay mineral in nature. It is formed by weathering of feldspar or other silicate minerals in igneous and metamorphic rocks in an acidic medium lacking alkali metals and alkaline earth metals. China's kaolin mineral resources rank among the top in the world, with 267 proven mines and proven reserves of 2.910 billion tons. Among them: my country's non-coal-built kaolin resources rank fifth in the world. The proven reserves are 1.468 billion tons, mainly distributed The six provinces of Guangdong, Shaa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D21/01B01D36/04
CPCB01D21/01B01D36/04
Inventor 冯杰张飞李青石晓岚王帅邹李唐小刚刘新陈国华
Owner 中国高岭土有限公司