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Purification method of high-purity quartz sand with SiO2 purity more than or equal to 99.99%

A technology of high-purity quartz sand and a purification method, which is applied in the field of purification of high-purity quartz sand with SiO2 purity ≥ 99.99%, can solve the problems of low added value of quartz sand and the inability to maximize economic benefits, etc., so as to improve product purity and improve The effect of economic benefits

Active Publication Date: 2019-08-16
HUANGGANG NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, low-quality quartz sand has low added value and cannot maximize economic benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Use 60-200 mesh quartz sand powder produced by a quartz sand company in Heyuan City, Guangdong Province as raw material

[0037] 1 Flotation: first flotation to remove feldspar impurities, and then flotation to remove layered aluminosilicate mineral impurities

[0038] Using hydrofluoric acid and NaOH as the pH regulator, dodecylamine as the trapping agent, and No. 2 oil as the foaming agent, the quartz sand powder is subjected to three flotations under the condition of pH 2.0 to 3.0 to remove feldspar mineral impurities; and then Hydrochloric acid and sodium hydroxide are used as pH regulators, quaternary ammonium salt cations (tetradecyltrimethylammonium chloride) are used as capture agents, and phenethyl ester oil is used as foaming agents, under the condition of pH 2.0-3.0 Three times of flotation to remove layered aluminosilicate mineral impurities such as kaolin, illite, pyrophyllite, etc., then washed with water until neutral, dehydrated, and dried for later use....

Embodiment 2

[0052] Take the 60-200 mesh quartz sand powder produced by a quartz sand company in Lankou, Heyuan City, Guangdong Province as an example

[0053] 1 Flotation: Remove feldspar impurities by conventional flotation methods;

[0054] Using hydrofluoric acid and KaOH as the pH regulator, dodecylamine as the capture agent, and No. 2 oil as the foaming agent, the quartz sand powder is subjected to 4 times of flotation under the condition of pH 2.0 to 3.0 to remove feldspar mineral impurities; Then hydrochloric acid and sodium hydroxide are used as pH regulators, quaternary ammonium salt cation (tetradecyltrimethylammonium chloride) is used as capture agent, phenethyl ester oil is used as foaming agent, and the pH is 2.0 to 3.0. Carry out 4 times of flotation to remove layered aluminosilicate mineral impurities such as kaolin, illite, pyrophyllite, etc., then wash with clean water until neutral, then dehydrate and dry for later use.

[0055] 2 High temperature activation and water q...

Embodiment 3

[0068] Take the 60-180 mesh quartz sand powder produced by a quartz sand factory in Heyuan City, Guangdong Province as an example

[0069] 1 Flotation: First flotation to remove feldspar impurities; then flotation to remove layered aluminosilicate mineral impurities

[0070] Using hydrofluoric acid and KOH as the pH regulator, dodecylamine as the capture agent, and No. 2 oil as the foaming agent, the quartz sand powder is flotation to remove feldspar mineral impurities under the condition of pH 2.0-3.0; then hydrochloric acid And sodium hydroxide as pH regulator, quaternary ammonium salt cation (tetradecyltrimethylammonium chloride) as capture agent, phenethyl ester oil as foaming agent, flotation under the condition of pH 2.0-3.0 Remove layered aluminosilicate mineral impurities such as kaolin, illite, pyrophyllite, etc., then wash with water until neutral, then dehydrate and dry for later use.

[0071] 2 High temperature alkali washing to remove impurities:

[0072] Put th...

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PUM

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Abstract

The invention discloses a purification method of high-purity quartz sand with SiO2 purity more than or equal to 99.99%, and the purification method comprises the following steps: (1) flotation-multiple flotation separation to remove feldspar particles and layered aluminosilicate mineral particle impurities; (2) high temperature activation and water quenching cooling; (3) high-temperature alkalinewashing to remove impurities; (4) high-temperature oxidation pickling to remove impurities; (5) ultrasonic washing for many times, dewatering and drying; and (6) high-temperature heating and chlorination to remove impurities. The purification method has the beneficial effects that the high-purity quartz sand with SiO2 purity more than or equal to 99.99% is obtained after raw material quartz sand with the purity of 99.5% is purified, the economic benefits of enterprises are obviously improved; a new method to remove gas, liquid and solid inclusions in quartz particles is explored; crystal transformation temperature of the quartz particles is increased to 1600 DEG C, so that structural water (hydroxyl groups), gas inclusions and liquid inclusions in crystal lattices quickly escape from the crystal lattices, and metal impurities are fully exposed, the metal impurities are removed by high-temperature chlorination, and the purity of the product is improved.

Description

technical field [0001] The invention belongs to the technical field of non-metallic ore deep processing, and in particular relates to a SiO 2 Purification method of high-purity quartz sand with purity ≥ 99.99%. Background technique [0002] As an important inorganic non-metallic material, quartz sand is widely used in various fields of industrial production. my country's quartzite resources are very rich; mainly distributed in Leizhuang, Hebei, Linyi, Shandong, Donghai-Suqian, Jiangsu; Fengyang, Anhui, Heyuan, Guangdong and other places; There are also significant differences in the composition of impurities. For example, the quartz sand produced in Leizhuang, Shandong and Linyi, Shandong is a high-quality float glass raw material; the quartz sand produced in Fengyang, Anhui is a high-quality raw material for daily glassware; the quartz sand produced in Heyuan, Guangdong is ultra-white glass, artificial quartz High-quality raw materials for stone slabs; East China Sea, Jia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18
CPCC01B33/18C01P2006/80
Inventor 田辉明田正芳黄林勇杨水彬陈中文雷绍民
Owner HUANGGANG NORMAL UNIV
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