Purification method for quartz sand

A purification method and quartz sand technology, applied in the field of purification, can solve the problems of difficulty in meeting the requirements of quartz purity, unsatisfactory quartz sand purity, difficulty in removing impurities and separation of ore, and shortening the time of acid leaching and purification. , the effect of improving thermal properties

Inactive Publication Date: 2016-11-09
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 of quartz sand obtained by the existing purification process is still not very ideal, and the application range is small, so it is difficult to meet the requirements of high-tech industries for quartz purity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of purification method of quartz sand that the present invention proposes, comprises the following steps:

[0026] S1. Crush the raw quartz sand to a particle size of 0.3mm or less, add water to prepare a slurry with a concentration of 20wt%, send it into a ball mill, add grinding aids and ball mill for 40 minutes, wherein the quality of the grinding aids is 0.2wt of the mass of the pulp %, add in the magnetic separator after drying and carry out magnetic separation, obtain material A after drying, wherein, the magnetic separation intensity is 850kA / m, and the ore concentration is 25wt%, and the rotating speed is 200r / min;

[0027] S2. Heat material A to 550°C, keep it warm for 10 minutes, heat it to 700°C, keep it warm for 10 minutes, and then put it into a chlorination device for chlorination, wherein the temperature of chlorination is 1000°C, and the vacuum degree of chlorination is 6×10 -6 Pa, the chlorination time is 7h, the chlorination reagent used is a mi...

Embodiment 2

[0030] A kind of purification method of quartz sand that the present invention proposes, comprises the following steps:

[0031] 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, add grinding aids and ball mill for 50 minutes, wherein the quality of the grinding aids is 0.05wt of the mass of the pulp %, after drying, add it to a magnetic separator for magnetic separation, and obtain material A after drying, wherein the magnetic separation intensity is 1100kA / m, the ore feeding concentration is 40wt%, and the rotating speed is 120r / min; the grinding aid is isoamyl A mixture of alcohol, n-octanol, sodium oleate, sodium naphthenate, sodium naphthene sulfonate, sodium chloride, sodium dodecylbenzenesulfonate, and octadecylamine in any weight ratio;

[0032] S2. Heat material A to 500°C, keep it warm for 25 minutes, heat it to 600°C, keep it warm for 25 minutes, and then pu...

Embodiment 3

[0035] A kind of purification method of quartz sand that the present invention proposes, comprises the following steps:

[0036] S1. Crush the raw quartz ore until the particle size is below 0.3 mm, add water to prepare a pulp with a concentration of 15 wt%, send it into a ball mill, add sodium oleate and ball mill it for 46 minutes, wherein the quality of sodium oleate is 0.1 wt% of the pulp mass %, add in the magnetic separator after drying and carry out magnetic separation, obtain material A after drying, wherein, the magnetic separation intensity is 1000kA / m, the ore concentration is 35wt%, and the rotating speed is 160r / min;

[0037] S2. Heat material A to 535°C, keep it warm for 20 minutes, heat it to 665°C, keep it warm for 22 minutes, and then put it into a chlorination device for chlorination, wherein the temperature of chlorination is 950°C, and the vacuum degree of chlorination is 7×10 -6 Pa, the chlorination time is 5.9h, the chlorination reagent used is a mixture ...

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PUM

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Abstract

The invention discloses a purification method for quartz sand. The purification method comprises the following steps: crushing raw quartz ore, adding water, carrying out blending, then adding a grinding aid and successively carrying out ball milling, magnetic separation and drying so as to obtain a material A; subjecting the material A to heating, heat preservation, chlorination water and quenching and then carrying out filtering and drying so as to obtain a material B; and adding the material B into a mixed acid solution, carrying out ultrasonic treatment at 35 to 65 DEG C for 3 to 8 h and then successively carrying out filtering, washing until a pH value is 7, and drying so as to obtain purified quartz sand. The purification method for quartz sand is simple in steps, and the obtained quartz sand is high in purity and good in stability and can be applied to a plurality of fields.

Description

technical field [0001] The invention relates to the technical field of purification, in particular to a method for purifying 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 to a very low range. At present, only the first-gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
Inventor 余荣林
Owner 安徽晶晶石英科技有限公司
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