Production technology of high

A production process, kaolin technology, applied in clay processing equipment, clay preparation equipment, chemical instruments and methods, etc., can solve problems such as low viscosity concentration, and achieve stable product performance

Inactive Publication Date: 2008-02-06
CHINA UNIV OF GEOSCIENCES (WUHAN) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Looking at other studies on the viscosity reduction of kaolin in China, there is no industrial use of intercalation technology to reduce the viscosity of kaolin, a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] As shown in Fig. 2 and Fig. 3, a kind of production technique of high viscosity concentration kaolin, it comprises the steps:

[0043] 1) Kaolin ore is mined by hydromechanical method, and kaolin ore slurry J is obtained through pulping, grading, chemical bleaching, washing to remove iron, dehydration by pressure filtration, dispersion pulping, peeling, and vibrating sieve classification;

[0044] The specific steps are:

[0045] a) Pulping (using hydromechanical method to mine kaolin ore and making kaolin slurry): adopting hydromechanical method to mine kaolin ore at the mine, the mass concentration of the collected ore slurry is 6%, and the ore slurry is transported to the Spiral classifier and three-stage hydrocyclone are used to classify and remove sand to obtain kaolin slurry A, which is input into the slurry storage tank; dispersant sodium hexametaphosphate and sodium silicate are added to kaolin slurry A for pulping to obtain kaolin Ore slurry B, the addition am...

Embodiment 2

[0063] A kind of production technology of high viscosity concentration kaolin, it comprises the steps:

[0064] 1) Kaolin ore is mined by hydromechanical method, and kaolin ore slurry J is obtained through pulping, grading, chemical bleaching, washing to remove iron, dehydration by pressure filtration, dispersion pulping, peeling, and vibrating sieve classification;

[0065] The specific steps are:

[0066] a) Pulping (use hydromechanical method to mine kaolin ore and make kaolin slurry): use hydromechanical method to mine kaolin ore at the mine, and the mass concentration of the collected slurry is 8%, and the ore slurry is sent to the Spiral classifier and three-stage hydrocyclone are used to classify and remove sand to obtain kaolin slurry A, which is input into the slurry storage tank; dispersant sodium hexametaphosphate and sodium silicate are added to kaolin slurry A for pulping to obtain kaolin Ore slurry B, the addition amount is to add 1.5 kilograms of sodium hexamet...

Embodiment 3

[0084] A kind of production technology of high viscosity concentration kaolin, it comprises the steps:

[0085] 1) Kaolin ore is mined by hydromechanical method, and kaolin ore slurry J is obtained through pulping, grading, chemical bleaching, washing to remove iron, dehydration by pressure filtration, dispersion pulping, peeling, and vibrating sieve classification;

[0086] The specific steps are:

[0087] a) Pulping (using hydromechanical method to mine kaolin ore and making kaolin slurry): adopting hydromechanical method to mine kaolin ore at the mine, the mass concentration of the collected ore slurry is 9%, and the ore slurry is transported to the Spiral classifier and three-stage hydrocyclone are used to classify and remove sand to obtain kaolin slurry A, which is input into the slurry storage tank; dispersant sodium hexametaphosphate and sodium silicate are added to kaolin slurry A for pulping to obtain kaolin Ore slurry B, the addition is to add 1.1 kilograms of sodium ...

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PUM

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Abstract

The present invention relates to a manufacturing technique of kaolin with high viscosity and concentration. A manufacturing technique of kaolin with high viscosity and concentration is characterized by comprising following procedures: 1) manufacturing kaolin slurry J with kaolin extracted by hydraulic machinery method undergoing pulping, classification, chemical bleaching, iron removal by washing, dehydrating through pressure filters, dispersed pulping, exfoliation, vibration screen classification ; 2) spray drying and intercalation which is accomplished by a) firstly, improving product lines of a spray drying equipment, that is, adding a thermal insulation layer to a packing auger, a lift pot and a storage hopper of the spray drying equipment, and then arranging a variable frequency feeding machine communicated with a urea crusher through pipelines on the packing auger of the bottom of a spray drying mouth of the spray drying equipment; b) spray drying to achieve kaolin powder; c) intercalating intercalation agent urea with the kaolin powder through the variable frequency feeding machine with parameter of a fresh feed pump between 2 HZ and 8 HZ and with additional of mass of the intercalation agent urea between 2 percent and 10 percent of the mass of the kaolin powder; thereby getting final kaolin products with viscosity and concentration between 72 percent and 73.7 percent. The manufacturing technique can produce kaolin with high viscosity and concentration.

Description

technical field [0001] The invention relates to a production process of high-viscosity kaolin. Background technique [0002] Kaolin is mainly composed of kaolinite group minerals. Kaolinite is a 2-octahedral 1:1 type layered silicate. formed by interconnecting. It is widely used, mainly as paper coating or filler to increase paper whiteness, opacity, smoothness and printability. [0003] At present, the kaolin used in papermaking in my country is in short supply, and most of the kaolin used by domestic papermaking enterprises depends on imports. There are a lot of domestic studies on viscosity, but most of them are not effective. The viscosity concentration of papermaking kaolin in my country is mostly between 66% and 70% (the kaolin industry often expresses the level of viscosity with the viscosity concentration value, and its unit is the percentage concentration value at 500mPa s. A large value indicates low viscosity; otherwise, high viscosity ), and with the developme...

Claims

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Application Information

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IPC IPC(8): B28C1/04
Inventor 严春杰朱小燕陈洁渝
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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