Quartz sand purifying technology

A quartz sand and process technology, applied in the direction of silicon dioxide, silicon oxide, etc., can solve problems such as unsatisfactory, and achieve the effect of short time consumption, simple process and good impurity removal effect.

Inactive Publication Date: 2014-03-26
成都兴能新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And when preparing fused silicon micropowder in the prior art, magnetic separation process is often adopted, but this can only remove magnetic minerals including intergrowth particles, such as hematite, limonite, biotite, ilmenite, yellow Impurity minerals such as iron ore and garnet, but the removal effect of thin film iron or disseminated iron on the surface of quartz sand particles is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A quartz sand purification process, comprising the following steps:

[0024] (1) Crushing: crush the raw material quartz ore to 20-40mm to obtain material A;

[0025] (2) Scrubbing: Material A is mechanically scrubbed to obtain material B;

[0026] (3) Desliming: using a desliming hopper to remove the mud and water in the material B to obtain material C;

[0027] (4) Flotation: add water to the material C to adjust the slurry to a concentration of 20~30%, add the foaming agent dodecylamine acetate, and add dilute sulfuric acid to pH=2.0~3.0, remove the surface foam, and obtain the lower solid After drying, material D is obtained;

[0028] (5) Acid leaching: Add material D to mixed acid, stir and leaching at 80°C for 2~4 hours, wash to neutral, and then dry to obtain material E;

[0029] (6) Microbial leaching: add water to the above-mentioned material E to prepare quartz mortar, add microorganisms for leaching and iron removal, and then dry to obtain the finished qua...

Embodiment 2

[0031] A quartz sand purification process, comprising the following steps:

[0032] (1) Crushing: crush the raw material quartz ore to 20-40mm to obtain material A;

[0033] (2) Scrubbing: Material A is mechanically scrubbed to obtain material B;

[0034] (3) Desliming: using a desliming hopper to remove the mud and water in the material B to obtain material C;

[0035] (4) Flotation: add water to the material C to adjust the slurry to a concentration of 20~30%, add the foaming agent dodecylamine acetate, and add dilute sulfuric acid to pH=2.0~3.0, remove the surface foam, and obtain the lower solid After drying, material D is obtained;

[0036] (5) Acid leaching: Add material D to mixed acid (the mixed acid is: 20% sulfuric acid: 36% hydrochloric acid: 70% nitric acid: hydrofluoric acid = 50:25:15:10; the addition of the mixed acid The mass ratio is: material C: mixed acid: water = 100:25:50), stirred and leached at 80°C for 2~4 hours, washed to neutral, and then dried to ...

Embodiment 3

[0040] A quartz sand purification process, comprising the following steps:

[0041] (1) Crushing: crush the raw material quartz ore to 20-40mm to obtain material A;

[0042] (2) Scrubbing: Material A is mechanically scrubbed to obtain material B;

[0043] (3) Desliming: using a desliming hopper to remove the mud and water in the material B to obtain material C;

[0044] (4) Flotation: add water to the material C to adjust the slurry to a concentration of 20~30%, add the foaming agent dodecylamine acetate, and add dilute sulfuric acid to pH=2.0~3.0, remove the surface foam, and obtain the lower solid After drying, material D is obtained;

[0045] (5) Acid leaching: Add material D to mixed acid (the mixed acid is: 20% sulfuric acid: 36% hydrochloric acid: 70% nitric acid: hydrofluoric acid = 50:25:15:10; the addition of the mixed acid The mass ratio is: material C: mixed acid: water = 100:25:50), stirred and leached at 80°C for 2~4 hours, washed to neutral, and then dried t...

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PUM

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Abstract

The invention provides a quartz sand purifying technology, and belongs to the field of preparation process of quartz sand. The quartz sand purifying technology provided by the invention comprises the steps of crushing, scrubbing, desliming, flotation, acid leaching and microbiological leaching, and optimizing treatment is performed on all steps. The technology is simple, and excellent in purification effect, and the high-quality refined quartz sand of which the content of SiO2 is equal to or greater than 99.9%, the content of Fe2O3 is less than or equal to 0.006%, the content of Al2O3 is less than or equal to 0.05% and the content of TiO2 is less than or equal to 0.02%.

Description

[0001] technical field [0002] The invention belongs to the preparation process of quartz sand, in particular to a purification process of quartz sand. Background technique [0003] High-purity quartz sand is the only raw material for the production of high-quality quartz glass used in high-tech fields such as optical fiber communications, electronics, semiconductors, solar energy, lasers, and aerospace. The high-purity quartz sand produced by Ming (UNIMIN) company is the standard, and its IOTA-CG grade is the lowest-end product. The total amount of metal element impurities is 22ppm±, that is, the content of impurity elements in 1 ton of quartz sand must be less than 22 grams to achieve high purity. Quartz sand standard. High-purity quartz sand is produced from natural quartz ore. Quartz ore contains a large amount of impurity minerals, mainly mica minerals and feldspar minerals. In the production of high-purity quartz sand, the first step is to remove quartz Almost all ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
Inventor 王维利范未峰
Owner 成都兴能新材料股份有限公司
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