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Preparation method of a high-purity quartz glass raw material

A quartz glass and raw material technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of not being able to use high-purity quartz glass raw materials, low SiO2 content, etc., achieve low production costs, reduce Al2O3 content, The effect of high yield

Inactive Publication Date: 2019-01-04
SINOSTEEL MAANSHAN INST OF MINING RES +1
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Problems solved by technology

But in general, the SiO in the processed product 2 The content is still not high, the highest is only 98.61%, and the impurity Fe 2 o 3 The content is high, so it cannot be used as high-purity quartz glass raw material

Method used

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  • Preparation method of a high-purity quartz glass raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A certain quartz sand SiO 2 Grade 99.1942%, Al 2 o 3 Content 0.5242%, Fe 2 o 3 content of 0.1388%, first desliming the quartz sand less than 0.3mm, the desliming amount is 16.37wt%, and the bottom flow is the deslimed sand; then the deslimed sand is fed into the flotation machine for reverse flotation, and the reverse flotation process is a rough selection 1. One-time selection, the dosage of rough selection pH regulator sulfuric acid is 1000g / t, the dosage of dispersant sodium hexametaphosphate is 1500g / t, and the collector is a combination of sodium oleate and dodecylamine, which are added separately, and the dosage is 5000g / t respectively , 800g / t, the amount of selected dodecylamine is 400g / t, and the bottom of the tank is flotation concentrate; then the flotation concentrate is subjected to deep desliming, the desliming amount is 5.12wt%, and the coarse-grained grade is deslimed concentrate ore; then the deslimed concentrate is fed into the strong magnetic sepa...

Embodiment 2

[0038] A certain quartz sand SiO 2 Grade 98.7701%, Al 2 o 3 Content 0.4983%, Fe 2 o 3 content of 0.2720%, desliming the quartz sand less than 0.3mm, the desliming amount is 10.00wt%, and the bottom flow is the deslimed sand; then the deslimed sand is fed into the flotation machine for reverse flotation, and the reverse flotation process is a rough selection 1. One-time selection, the dosage of rough selection pH regulator sulfuric acid is 1000g / t, the dosage of dispersant sodium hexametaphosphate is 1500g / t, and the collector is a combination of sodium oleate and dodecylamine, which are added separately, and the dosage is 5000g / t respectively , 800g / t, the amount of selected dodecylamine is 400g / t, the bottom of the tank is flotation concentrate; then the flotation concentrate is deslimed in depth, the desliming amount is 5.00wt%, and the coarse-grained grade is desliming concentrate ore; then the deslimed concentrate is fed into the strong magnetic separator for magnetic ...

Embodiment 3

[0041] A certain quartz sand SiO 2 Grade 98.4813%, Al 2 o 3 Content 0.6897%, Fe 2 o 3 content of 0.3948%, desliming the quartz sand less than 0.3mm first, the desliming amount is 20.00wt%, and the bottom flow is deslimed sand; then the deslimed sand is fed into the flotation machine for reverse flotation, and the reverse flotation process is a rough selection 1. One-time selection, the dosage of rough selection pH regulator sulfuric acid is 1000g / t, the dosage of dispersant sodium hexametaphosphate is 1500g / t, and the collector is a combination of sodium oleate and dodecylamine, which are added separately, and the dosage is 5000g / t respectively , 800g / t, the amount of selected dodecylamine is 400g / t, and the bottom of the tank is flotation concentrate; then the flotation concentrate is deslimed deeply, the desliming amount is 10.00wt%, and the coarse-grained grade is deslimed concentrate ore; then the deslimed concentrate is fed into the strong magnetic separator for magne...

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Abstract

The invention discloses a preparation method of a high-purity quartz glass raw material. Quartz sand with the particle size smaller than or equal to 0.3 mm and the SiO2 content higher than or equal to98.3% is used as a raw material, the raw material is fed to be subjected to desliming operation, produced delimed sand is fed into a flotation machine to be subjected to reverse flotation operation,produced reverse flotation concentrate is fed to be subjected to deep desliming operation, produced demineralized concentrate is fed into a strong magnetic separator to be subjected to strong magneticseparation impurity removal operation, produced magnetic separation concentrate is concentrated and then fed into a leaching tank containing an acid solution to be stirred and treated, impurity elements which are soluble to acid in the magnetic separation concentrate are removed, the mass concentration ratio of sulfuric acid to hydrochloric acid to nitric acid to hydrofluoric acid in the acid solution in the leaching process is (28.5% to 31.5%): (14.5% to 16.0%): (8.7% to 9.3%): (5.7% to 6.3%), and the leaching liquid-solid ratio v:m is (3.8-4.2):1; and finally, washing, grading, filtering and drying are carried out, and then high-purity quartz sand with the SiO2 grade higher than or equal to 99.92% is obtained. The preparation method has the advantages of the simple process flow, the lowproduction cost, the high obtained quartz sand product purity and the like.

Description

technical field [0001] The invention belongs to the technical field of quartz sand beneficiation and purification, and in particular relates to a preparation method of high-purity quartz glass raw material, which is used for preparing SiO 2 High-purity quartz glass raw material with a content higher than 99.99%. Background technique [0002] High-purity quartz sand generally refers to SiO 2 Quartz powder with a content higher than 99.95% is the main raw material for quartz glass and quartz crucible. Its high-grade products are widely used in large-scale and ultra-large-scale integrated circuits, optical fibers, solar cells, lasers, aerospace, military and other industries. Since these industries are related to the long-term development of the country and are a necessary condition for the sustainable development of high-tech in a country, the strategic position of high-purity quartz sand is very important. The preparation technology of its high-end products is monopolized by...

Claims

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Application Information

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IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 高春庆王海亮杨任新沈进杰骆洪振孙炳泉侯更合
Owner SINOSTEEL MAANSHAN INST OF MINING RES
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