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Method for purifying powdery quartz

A quartz, mass concentration technology, used in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of easy contamination, high hardness, and difficulty in ultra-fine grinding, achieving no comprehensive cost and high product yield. , the effect of low comprehensive cost

Inactive Publication Date: 2011-05-04
CHINA UNIV OF GEOSCIENCES (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high hardness of vein quartz, its ultra-fine pulverization is difficult and easy to be polluted.

Method used

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  • Method for purifying powdery quartz
  • Method for purifying powdery quartz
  • Method for purifying powdery quartz

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 200g of powdered quartz, add 100mL of water, mix well and grind in a 1L ball mill for 5min; scrub the slurry in a scrubber for 20min, then add 600mL of water, 1.0g of sodium polyacrylate, stir well and settle in a 2L beaker for 1h. Pour the suspension to get the sediment; add water to the sediment to adjust its mass concentration to 66%, grind it in a 2L medium stirring mill for 0.5h, then adjust the mass concentration of the slurry to 15%, and classify with a hydrocyclone with a diameter of 25mm 3 times, when classifying, the diameter of the underflow port is 3mm, and the classification pressure is 0.3MPa. The underflow after classification is taken. After the underflow sample is filtered and dried, the SiO of the obtained powder 2 The content is 99.8%; add water to the underflow material to adjust the mass concentration to 60%, after grinding for 4 hours in a 2L medium stirring mill, add water to adjust the mass concentration of the slurry to 7%, and then classify...

Embodiment 2

[0020] Take 80kg of powdered quartz, add 40L of water, mix well and grind in a 100L ball mill for 5min; scrub the slurry in a scrubber for 20min, then add 250L of water, add 250g of sodium hexametaphosphate, stir well and settle in a 500L bucket for 1.5 h, dump the suspension to remove the sediment; the tailings obtained after the suspension is filtered and dried are marked as tailings 1; add water to the sediment to adjust the mass concentration to 73%, and grind it once in a 20L medium stirring mill. Then adjust the mass concentration of the slurry to 15%, use a diameter of 25mm hydrocyclone classification 3 times, the underflow opening diameter is 4mm during classification, and the classification pressure is 0.4MPa, get the underflow after classification, the underflow sample is filtered, After drying, the obtained powder is product 1; add water to adjust the mass concentration of product 1 to 60%, grind it in a 20L medium stirring mill for 5 times, add water to adjust the m...

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Abstract

The invention relates to a method for purifying powdery quartz by a gravity separation method, which belongs to the technical field of mineral processing and preparation of superfine powder. The method comprises the steps of: mixing water and powdery quartz to prepare slurry, and then pulverizing; adding the powdery quartz as a dispersing agent; scrubbing in a scrubbing machine; adding the water to regulate the dispersing agent; uniformly stirring, and then settling to obtain precipitates; mixing the precipitates with the water to form mass-concentration slurry; grinding in a medium stirring mill; adding water to the ground slurry to form the slurry with a certain mass concentration; then grading three times with a whirlcone; obtaining the precipitates which can be used as raw material of ceramics and glass; adding water to the quartz powder with very high SiO2 content to form the slurry with certain mass concentration; grinding in the medial stirring mill; then adding water to form the slurry with the certain mass concentration; grading three to five times in the whirlcone; and obtaining the precipitates which have very high SiO2 content and fineness. After a suspension in the process is filtered, the obtained powdery body meets the quality requirement that SiO2 is larger than 99.0%; and the water can be reused.

Description

1. Technical field [0001] The invention relates to a method for purifying powdered quartz by a gravity beneficiation method, and belongs to the technical field of mineral processing and ultrafine powder preparation. 2. Background technology [0002] Powder quartz ore is a new type of siliceous raw material formed by the weathering of microcrystalline quartzite. It has the characteristics of fine particle size and easy crushing. Its main chemical composition is silicon dioxide, containing a small amount of impurities such as aluminum oxide, iron oxide, potassium oxide, sodium oxide, calcium oxide, and magnesium oxide. Powder quartz ore has been found in Guangxi, Jiangxi, Yunnan, Chongqing and other provinces and cities in southern my country. High-purity ultra-fine quartz powder is widely used in electronic and electrical materials, rubber fillers, paint fillers and other fields. At present, the method of preparing high-purity ultra-fine quartz powder is mainly obtained by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B5/30B03B5/34B02C17/22B02C17/20
Inventor 廖立兵杜高翔杨伟刚何浩梁兴文
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)