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Method for purifying quartz sand by compounding chlorination with acid leaching

A quartz sand and acid leaching technology, which is applied in the field of quartz sand purification, can solve the problems of unsatisfactory purity and stability of quartz sand, difficulty in removing impurities and separation of ore, and limited application range, so as to shorten the time of acid leaching and improve thermal performance. characteristics, cost reduction effect

Inactive Publication Date: 2016-10-12
安徽晶晶石英科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although my country is a country with a large amount of silica minerals, the deposits with a silica content > 99.95% are quite rare. The raw quartz ores in my country are often accompanied by a variety of impurity minerals, such as feldspar, mica, kaolin, etc., so the purity is not high. Separation of impurities brings great difficulties
The purity and stability of the quartz sand obtained by the existing purification process are still not ideal, and there are defects in the limited application range, which makes it difficult to meet the requirements of the high-tech industry for the purity of quartz

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of chlorination-acid leaching compound purification quartz sand method that the present invention proposes comprises the following steps:

[0030] S1. Crush the raw quartz ore until the particle size is less than 0.3mm, add water to prepare a pulp with a concentration of 20wt%, send it into a ball mill, and add isoamyl alcohol to ball mill for 40 minutes, wherein the quality of isoamyl alcohol is 0.2wt of the pulp mass %, after drying, carry out magnetic separation in a magnetic separator, and obtain material A after drying, wherein the magnetic separation intensity is 1000kA / m, the ore feeding concentration is 25wt%, and the rotating speed is 35r / min;

[0031] S2, adding water to the material A to obtain a slurry with a concentration of 15 wt%, heating to 45° C., adjusting the pH value of the slurry to 2, stirring for 5 minutes, adding a collector for flotation for 10 minutes, and then washing and drying to obtain material B; Wherein, the mass of collector used ...

Embodiment 2

[0036] A kind of chlorination-acid leaching compound purification quartz sand method that the present invention proposes comprises the following steps:

[0037] S1. Crush the raw quartz ore until the particle size is less than 0.3mm, add water to prepare a slurry with a concentration of 10wt%, send it into a ball mill, and add grinding aids for ball milling for 50 minutes, wherein the quality of the grinding aids is 0.1wt of the mass of the pulp %, after drying, carry out magnetic separation in a magnetic separator, and obtain material A after drying, wherein the magnetic separation intensity is 1500kA / m, the ore feeding concentration is 15wt%, and the rotating speed is 80r / min; the grinding aid is positive octane A mixture of alcohol, sodium oleate, and sodium naphthenate in a weight ratio of 1:2:3;

[0038] S2, adding water to the material A to obtain a slurry with a concentration of 30 wt%, heating to 30° C., adjusting the pH value of the slurry to 3, stirring for 1 min, ad...

Embodiment 3

[0043] A kind of chlorination-acid leaching compound purification quartz sand method that the present invention proposes comprises the following steps:

[0044] S1. Crush the raw quartz ore until the particle size is less than 0.3mm, add water to prepare a slurry with a concentration of 13wt%, send it into a ball mill, and add sodium dodecylbenzenesulfonate for ball milling for 47min, wherein dodecylbenzenesulfonate The quality of sodium bicarbonate is 0.13wt% of ore pulp quality, carries out magnetic separation in magnetic separator after drying, obtains material A after drying, and wherein, magnetic separation intensity is 1300kA / m, and ore concentration is 18wt%, and rotating speed is 60r / m min;

[0045] S2. Add water to the material A to obtain a slurry with a concentration of 22 wt%, heat to 42°C, adjust the pH value of the slurry to 2, stir for 4 minutes, add sodium oleate for flotation for 11 minutes, then wash and dry to obtain material B; Wherein, the quality of sodi...

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Abstract

The invention discloses a method for purifying quartz sand by compounding chlorination with acid leaching. The method comprises the following steps: quartz raw ores are crushed, a grinding aid is added for ball milling, and the magnetic separation is performed in a magnetic separator to obtain a material A after drying; water is added in the material A for mixing and heating, the flotation is performed after adjustment of a pH value, and a material B is obtained by water washing and drying; the material B is heated, insulated and added in a chlorination device for chlorination, is cooled to 820-850 DEG C after chlorination, is poured in acid mixing solution, is ultrasonically mixed by 4-10 h at 40-70 DEG C, is filtered and washed to reach a neutral state, and is dried to obtain a material C; the material C is ultrasonically mixed by 15-25 min after water adding, and is filtered and dried to obtain a material D; and the material D is leached in chelating liquid for microwave reaction, and is filtered, washed and dried to obtain quartz after reaction. The method for purifying quartz sand by compounding chlorination with acid leaching, proposed by the invention, combines multiple processes; and the obtained quartz is high in purity and excellent in stability and optical performance.

Description

technical field [0001] The invention relates to the technical field of quartz sand purification, in particular to a chlorination-acid leaching compound purification method for quartz sand. Background technique [0002] Quartz is a mineral resource with very stable physical and chemical properties and a wide range of uses. It has been developed on a large scale in my country and has been widely used in glass, ceramics, rubber, casting, aerospace, bioengineering, high-frequency technology, electronics, etc. Technology, optical fiber communication and military industry and other fields. Aerospace, bioengineering, high-frequency technology, electronic technology, optical fiber communication and military industry and other high-tech industries are related to the long-term development of the country. The quartz sand used in these fields has strict requirements on the quality. The content of impurities, especially iron The content of metals such as aluminum and aluminum is limited ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 余荣林
Owner 安徽晶晶石英科技有限公司
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