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Method for removing gas-liquid inclusion and impurity during high-purity quartz sand production

A high-purity quartz sand and impurity removal technology, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve problems such as inability to apply high-end quartz glass, difficulty in making transparent quartz glass, quartz glass bubbles, and hydroxyl defects

Inactive Publication Date: 2011-09-14
银锐明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Structural impurities refer to impurities formed during the growth of quartz ore crystals, also known as microscopic defects, such as gas-liquid inclusions. It is difficult to eliminate such defects with existing technology. Such defects can be inherited to quartz glass, resulting in bubbles in quartz glass , The formation of hydroxyl defects makes it difficult to manufacture transparent quartz glass, so it cannot be applied to the production of high-end quartz glass

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In this embodiment, the screened quartz ore (the water content in the gas-liquid inclusions is more than 90%) is used as raw material, and processed according to the following procedures:

[0017] (1) Use a hammer crusher, a jaw crusher or manually crush the screened quartz mine to less than 5 cm, and sort out the non-quartz impurities that can be identified by the naked eye;

[0018] (2) Put the massive quartz ore into an electric furnace, calcinate at 950°C for 2 hours, take it out of the furnace to cool, and crush it to about 0.50mm with a roller crusher or a ball mill;

[0019] (3) Carry out magnetic separation, flotation, acid leaching, cleaning, drying to quartz sand to obtain pure quartz sand;

[0020] (4) Put the quartz sand into the quartz glass container carrier, carry out microwave treatment in a microwave sintering furnace, the microwave frequency is 2.45 GHz, and clean it with deionized water, so that the gas-liquid inclusions and impurities are selectively...

Embodiment 2

[0023] Embodiment 2: In this embodiment, the quartz ore (the water content in the gas-liquid inclusions is more than 80%) screened is used as raw material, and processed according to the following procedures:

[0024] (1) Use a hammer crusher, a jaw crusher or manually crush the screened quartz mine to less than 5 cm, and sort out the non-quartz impurities that can be identified by the naked eye;

[0025] (2) Put the massive quartz ore in an electric furnace, calcinate at 950°C for 2 hours, take it out of the furnace to cool, and crush it to about 0.40mm with a roller crusher or a ball mill;

[0026] (3) Carry out flotation, water quenching, acid leaching, magnetic separation, cleaning and drying to quartz sand to obtain pure quartz sand;

[0027] (4) Put the quartz sand into the quartz glass container carrier, carry out microwave treatment in a microwave sintering furnace, the microwave frequency is 2.45 GHz, and clean it with deionized water, so that the gas-liquid inclusion...

Embodiment 3

[0030] Embodiment 3: In this embodiment, the quartz ore (water content in gas-liquid inclusions is more than 70%) screened is used as raw material, and processed according to the following procedures:

[0031] (1) Use a hammer crusher, a jaw crusher or manually crush the screened quartz mine to less than 5 cm, and sort out the non-quartz impurities that can be identified by the naked eye;

[0032] (2) Put the massive quartz ore into an electric furnace, calcinate at 950°C for 2 hours, take it out of the furnace to cool, and crush it to about 0.50mm with a roller crusher or a ball mill;

[0033] (3) Carry out flotation, water quenching, acid leaching, magnetic separation, cleaning and drying to quartz sand to obtain pure quartz sand;

[0034] (4) Put the quartz sand into the quartz glass container carrier, carry out microwave treatment in a microwave sintering furnace, the microwave frequency is 2.45 GHz, and clean it with deionized water, so that the gas-liquid inclusions and ...

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Abstract

The invention relates to a method for removing gas-liquid inclusion and impurity during high-purity quartz sand production. On the basis of a production process of processing normal quartz ore into high-purity quartz sand by adopting the traditional preparation purification technique, a method for carrying out microwave treatment-follow load external addition on quartz sands for removing gas-liquid inclusion and other impurities is added. The method disclosed by the invention has especial effect on the quartz sands with gas-liquid inclusions including high-content and high-dielectric-constant water or impurities with high dielectric constant and loss coefficient characteristics; a selective heating characteristic of the microwave is utilized, i.e. the dielectric constant of SiO2 in the quartz sands is very low, the SiO2 is not generally heated in a microwave field, the gas-liquid inclusion or impurity with high dielectric constant or loss coefficient can be rapidly heated to form more than 1,000 DEG C of temperature difference, the generated thermal stress is enough to pull crack on the interfaces of the gas-liquid inclusion or impurity to generate micro cracks, and the cracks are extended to be broken by externally added load, thus the purposes of breaking the gas-liquid inclusion and peeling off the impurity are realized.

Description

Technical field: [0001] The invention relates to a purification method, in particular to a purification method applied in the production of quartz glass raw material-high-purity quartz sand. Background technique: [0002] Quartz glass is a single component SiO 2 The special glass of the component has excellent physical and chemical properties such as chemical stability, wide spectral transmission, thermal shock resistance, high temperature deformation resistance, radiation resistance, and electrical insulation. 2 Thin film materials, large-scale and ultra-large-scale integrated circuits, lasers, aerospace, military and other fields provide cutting-edge materials, which is an important direction for mineral applications in the 21st century. With the development of modern science and technology, the demand for quartz glass continues to increase, and its raw material ore, natural crystal resources, is nearly exhausted, which cannot meet the needs of modern high-tech industrial...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B1/00C03B20/00
Inventor 侯清麟陆振荣银锐明
Owner 银锐明
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