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Method for preparing silicon dioxide powder

A technology for silicon dioxide powder and raw materials, applied in the directions of silicon dioxide, silicon oxide, etc., can solve the problems of complex preparation method, high production cost, low work efficiency, etc., and achieve reasonable particle size distribution, low production cost, and high production efficiency. Effect

Active Publication Date: 2014-08-27
DONGHAI JINGSHENGYUAN SILICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the whiteness and particle size of silica produced by the existing processing technology cannot meet the requirements, it cannot be used as a raw material for some products with high requirements, such as adhesives
The existing silica powder preparation method is complicated, the labor intensity of workers is high, the work efficiency is low, the production cost is high, and the product particles are uncontrollable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1, a preparation method of silica powder material, the steps are as follows: (1) Raw material selection: choose SiO2 2 Quartz sand with purity ≥ 99%, whiteness > 93%, and weight water content ≤ 0.1% is used as raw material; (2) raw material processing: select and remove impurities, wash with pure water and dry naturally for later use; (3) raw material processing: The processed raw materials are put into a ball mill for ball milling. The speed of the ball mill is 24r / min. The ball milling medium is silica balls. The raw materials are subjected to magnetic separation before entering the ball mill and after coming out of the ball mill. Enter the air classifier for classification. The frequency converter of the air classifier is 10.5Hz, and the speed of the air classifier is 308r / min. The fine powder with a particle size of D50 = 19μm±2μm is collected into the cyclone collector to obtain the required silica powder product , the remaining silica powder is returned to...

Embodiment 2

[0008] Example 2, a preparation method of silica powder material, the steps are as follows: (1) Selection of raw materials: select SiO 2 Quartz sand with purity ≥ 99%, whiteness > 93%, and weight water content ≤ 0.1% is used as raw material; (2) raw material processing: select and remove impurities, wash with pure water and dry naturally for later use; (3) raw material processing: The processed raw materials are put into a ball mill for ball milling. The speed of the ball mill is 24r / min. The ball milling medium is silica balls. The raw materials are subjected to magnetic separation before entering the ball mill and after coming out of the ball mill. Enter the air classifier for classification, the air classifier inverter frequency is 12.5Hz, the air classifier speed is 367r / min, and the fine powder with a particle size of D50 = 14μm±2μm is collected into the cyclone collector to obtain the required silica powder product , the remaining silica powder is returned to the ball mi...

Embodiment 3

[0009] Example 3, a preparation method of silica powder material, the steps are as follows: (1) Raw material selection: choose SiO2 2 Quartz sand with purity ≥ 99%, whiteness > 93%, and weight water content ≤ 0.1% is used as raw material; (2) raw material processing: select and remove impurities, wash with pure water and dry naturally for later use; (3) raw material processing: The processed raw materials are put into a ball mill for ball milling. The speed of the ball mill is 24r / min. The ball milling medium is silica balls. The raw materials are subjected to magnetic separation before entering the ball mill and after coming out of the ball mill. Enter the air classifier for classification. The frequency converter of the air classifier is 18.5Hz, and the speed of the air classifier is 543r / min. The fine powder with a particle size of D50=8μm±2μm is collected into the cyclone collector to obtain the required silica powder product. , the remaining silica powder is returned to t...

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Abstract

The invention relates to a method for preparing silicon dioxide powder, comprising the following steps: treating a certain amount of required raw material which is the quartz sand, feeding the treated raw material into a ball grinder, grinding by the ball grinder to obtain the silicon dioxide powder, feeding the obtained silicon dioxide powder into an airflow classifier, classifying, collecting the fin powder with the particle size of D50 (D50=22mum-6mum) by a cyclone collector to obtain the product which is the silicon dioxide powder, returning the other silicon dioxide powder to the ball grinder from the coarse powder outlet of the airflow classifier, and regrinding the silicon dioxide powder. The product which is the silicon dioxide powder prepared by adopting the reasonable method has high quality, and the detection by the conventional method shows that the silicon dioxide powder has reasonable particle size distribution, the white degree of more than 94%, the moisture 0.1% or lower, the Fe2O3 of 0.0088% or lower and the Al2O3 of 0.03% or lower, and the silicon dioxide powder can be used for making key components used in the electronic industry, optical instruments and arts and crafts and can be particularly used as the raw material of the stone material adhesive.

Description

technical field [0001] The invention relates to a preparation method of silicon dioxide powder. Background technique [0002] Silica has a wide range of uses, mainly for the manufacture of important components of the electronics industry, optical instruments and handicrafts. Because the whiteness and particle size of silicon dioxide produced by the existing processing technology cannot meet the requirements, it cannot be used as a raw material for some products with high requirements, such as adhesives. The existing silica powder preparation method is complicated, labor intensity is high, work efficiency is low, production cost is high, and product particles are uncontrollable. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing silica powder material with reasonable method and high production efficiency in view of the deficiencies in the prior art. [0004] The technical problem to be solved...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18
Inventor 张习林
Owner DONGHAI JINGSHENGYUAN SILICA