Purification method in process of production of high-pure quartz sand as raw material of quartz glass

A technology of high-purity quartz sand and quartz glass, which is applied in the field of purification in the production of quartz glass raw material-high-purity quartz sand, can solve the problems of very difficult determination of quartz glass raw materials, enterprise losses, bankruptcy, etc., so as to improve the utilization value and increase Purity, enhanced activity effect

Inactive Publication Date: 2009-01-07
江苏阳山硅材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, in the current process of prospecting and processing, it is very difficult to judge whether the ore can be used as a raw material for quartz glass in terms of the bubble gas line of the product. It is necessary to make high-purity quartz sand and then produce quartz glass products to make a preliminary judgment. Do it once The production test of continuous fused quartz tube requires more than 300 kg of high-purity quartz sand for continuous production for more than ten hours. The loss can reach tens of thousands of yuan. Due to the instability of the quality of natural mineral resources and the complexity of detecting the content of hydroxyl groups and gas-liquid inclusions in raw ores, ore quality fluctuations cause heavy losses and even bankruptcy of enterprises.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In this embodiment, hydrothermal vein quartz produced in Donghai County, Jiangsu Province is used as a raw material, and processed according to the following procedures:

[0020] 1. Crush the vein quartz ore to less than 5 cm with a hammer crusher, a jaw crusher or manually, and sort and discard the non-quartz impurities that can be easily identified by the naked eye;

[0021] 2. Put the massive quartz ore into an electric furnace, calcine at 950°C for 2 hours, cool it out of the furnace, and pulverize it to below 0.30mm with a pair-roll crusher or a ball mill;

[0022] 3. Perform magnetic separation, flotation, acid leaching, cleaning and drying of quartz sand to obtain pure quartz sand;

[0023] 4. The pure quartz sand is calcined in a continuous electric furnace with a quartz glass tube as the carrier, and the high-temperature calcined quartz sand falls into a water tank for water quenching; among them, the calcination temperature is 1000 ℃, and the quartz sand is heated...

example 2

[0025] In this embodiment, vein quartz produced in Donghai County, Jiangsu Province is used as a raw material, and processed according to the following procedures:

[0026] 1. Crush the vein quartz ore to less than 5 cm with a hammer crusher, a jaw crusher or manually, and sort and discard the non-quartz impurities that can be easily identified by the naked eye;

[0027] 2. Use a hammer crusher, a pair of roller crusher or a ball mill to crush the massive quartz ore to less than 0.25mm;

[0028] 3. Perform magnetic separation, flotation, acid leaching, cleaning and drying of quartz sand to obtain pure quartz sand;

[0029] 4. The pure quartz sand is calcined in a continuous electric furnace with a quartz glass tube as the carrier, and the high-temperature calcined quartz sand falls into a water tank for water quenching; among them, the calcination temperature is 1050 ℃, and the quartz sand is heated in the electric furnace. The calcination time is the time difference between feedi...

example 3

[0031] In this embodiment, hydrothermal vein quartz produced in Donghai County, Jiangsu Province is used as a raw material, and processed according to the following procedures:

[0032] 1. Crush the vein quartz ore to less than 5 cm with a hammer crusher, a jaw crusher or manually, and sort and discard the non-quartz impurities that can be easily identified by the naked eye;

[0033] 2. Put the massive quartz ore into an electric furnace, calcine it at 1000°C for 4 hours, cool it out of the furnace, and pulverize it to less than 0.20mm with a pair-roll crusher or a ball mill;

[0034] 3. Perform magnetic separation, flotation, acid leaching, cleaning and drying of quartz sand to obtain pure quartz sand;

[0035] 4. The pure quartz sand is calcined in a continuous electric furnace with a quartz glass tube as the carrier, and the high-temperature calcined quartz sand falls into a water tank for water quenching; among them, the calcination temperature is 1100 ℃, and the quartz sand i...

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PUM

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Abstract

The invention discloses a purification method in the production of high-purity quartz sand applied to the raw materials of quartz glass. Through effectively eliminating hydroxyl group and gaseous-liquid inclusion in a natural quartz, the raw material of the quartz glass hyphen, the high-purity quartz sand produced by a common vein quartz, is realized, thereby achieving the effective control to key quality indexes such as air bubbles and air lines in a quartz glass product, and breaking the high dependency to the quality of an ore in the prior process art, so that the availability of vein quartz resources in a quartz glass industry is improved to above 80 percent from about 5 percent; the content of the high-purity quartz sand SiO2 produced by the common vein quartz ore reaches above 99.99 percent; and the total amount of the foreign impurities of thirteen metallic elements is less than 25 to 30 ppm.

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 an industrial glass composed of pure quartz, which is softened and shaped at high temperature with high-purity quartz sand as the only raw material. Quartz glass is a basic material for cutting-edge technology and emerging industries. It is widely used in advanced electric light sources, electronics, semiconductors, communications, thermal instruments, laboratory instruments, optics, chemicals, national defense, metallurgy, electrical and other industries and fields. Affect the development of national defense technology and national economy. Therefore, all major countries have listed high-purity quartz sand as an important strategic material. [0003] The quality requirements of the quartz glass industry for its raw material high-purity quar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C1/02C03C6/04C03B20/00C01B33/12
Inventor 杜建中
Owner 江苏阳山硅材料科技有限公司
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