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Method for improving kaolin ore pulp dewatering efficiency

A technology of kaolin and ore slurry, applied in separation methods, chemical instruments and methods, filtration separation, etc., can solve problems such as difficult dehydration and long dehydration time, and achieve the effects of reduced suspension, increased production capacity, and shortened filter press dehydration time

Active Publication Date: 2018-11-23
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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  • Method for improving kaolin ore pulp dewatering efficiency
  • Method for improving kaolin ore pulp dewatering efficiency

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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

The invention provides a method for improving the kaolin ore pulp dewatering efficiency. The method is characterized by comprising the following steps of adding water into kaolin raw ore to obtain rawpulp; obtaining ore pulp; guiding the ore pulp into an ore pulp pool; adding calcium oxide; after fast stirring, raising the pH value of the ore pulp to 7.0 to 8.0; adding polyacrylamide; performingslow stirring; performing still standing. The lower part of the ore pulp pool is provided with a water outlet and a pulp outlet; an outward water discharge device is arranged in the ore pulp pool andconsists of a floating ball and a hose; one end of the hose is connected with the floating ball; the other end of the hose is communicated with a water outlet; according to a buoyancy formula, the weight of the floating ball and the hose is enabled to be equal to the buoyancy of the floating ball in the ore pulp; the floating wall can be positioned in the upper layer clear liquid; the hose discharges the upper layer clear liquid from a water outlet position; then, aluminum sulfate is added; ore pulp after flocculent precipitation is discharged through a pulp outlet; press filtering is performed to obtain a finished product. The mode of combining added chemicals and installing the outward water discharge device in the ore pulp pool is used, so that the dewatering efficiency of the kaolin ore pulp is improved, so that the press filtering dewatering time is greatly shortened.

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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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