Autogenous grinding and impurity removing method of thermokalite in high-purity quartz sand production

A technology of high-purity quartz sand and quartz sand, which can be used in liquid cleaning methods, chemical instruments and methods, cleaning methods and utensils, etc. It can solve the problems of unstable quality control, waste of resources, and large amount of acid used for acid soaking. , to achieve the effect of improving resource utilization and production efficiency, eliminating the influence of human factors, and reducing the cost of wastewater treatment

Inactive Publication Date: 2010-04-21
江苏阳山硅材料科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Practice has shown that the above existing technologies have the following problems: 1) relying on manual hand selection at the initial stage of processing, the quality control cannot be stabilized, and the production efficiency is low; The ratio of sorting and discarding can reach 30-50%, causing a serious waste of resources; 3) the traditional acid soaking uses a large amount of acid, the soaking time is long, and it needs to be manually stirred in a plastic box, which is dangerous and seriously pollutes the environment

Method used

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  • Autogenous grinding and impurity removing method of thermokalite in high-purity quartz sand production
  • Autogenous grinding and impurity removing method of thermokalite in high-purity quartz sand production

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Embodiment 1

[0023] In this embodiment, the hydrothermal vein quartz produced in Qianshan County, Anhui Province is used as raw material, and processed according to the following procedures:

[0024] 1. Coarse crushing: Start the jaw crusher to crush the raw quartz ore to less than 6 cm.

[0025] 2. Soaking: The coarsely crushed quartz ore is evenly fed into the autogenous mill through the feeder, and at the same time, the pre-prepared 1% NaOH solution is fed according to the stable flow rate of the liquid-solid volume ratio of 1:1.

[0026] 3. Peeling: Preheat the horizontal autogenous mill with electric heating until the temperature of the probe installed above the inner side of the discharge port reaches 90°C. Taking the air temperature measured here as a reference system, set the control temperature of the electric heating system to 90°C. (Experiments have shown that the heating temperature needs to be controlled above 40°C. The higher the temperature, the better the effect of descali...

Embodiment 2

[0032] In this embodiment, the industrial crystal imported from Brazil is used as a raw material, and is processed according to the following procedures:

[0033] 1. Start the jaw crusher to crush the raw ore to less than 3 cm.

[0034] 2. The coarsely crushed quartz ore is evenly fed into the autogenous mill through the feeder, and at the same time, the pre-prepared 0.5% NaOH solution is fed according to the stable flow rate of the liquid-solid volume ratio of 0.5:1.

[0035] 3. Preheat the horizontal autogenous mill with electric heating until the temperature of the probe installed above the inner side of the discharge port reaches 80°C. Taking the air temperature measured here as a reference system, set the control temperature of the electric heating system to 80°C. Start the autogenous mill to make the quartz ore self-grind each other and remove the impurities on the surface of the ore. Adjust the rotational speed and feeding speed of the autogenous mill to keep the displ...

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Abstract

The invention relates to an autogenous grinding and impurity removing method of thermokalite in high-purity quartz sand production, which belongs to the technical field of quartz sand production. The method comprises the following steps: breaking quartz ores to reach lumpiness below 10 centimeters or granularity below 0.5 millimeter; uniformly inputting broken quartz lumps below 10 centimeters into an autogenous grinding machine (inputting quartz sand with the granularity being below 0.5 millimeter into a scrubbing machine), and meanwhile, adding an NaOH or Na2CO3 solution with a concentration of 1-2 percent according to a liquid-solid volume ratio of 0.5:1-2:1; at a temperature of 40-100 DEG C (90+ / -5 DEG C for the best), starting the autogenous grinding machine or the scrubbing machine to ensure that the quartz ores are mutually and autogenously ground so as to peel off impurities on the surfaces of the quartz ores; and washing the autogenously ground or scrubbed quartz by clear water or purified water until the pH value of the quartz reaches 7 after the washing. The invention can guarantee the product quality, obviously improve the resource utilization rate and the production efficiency, greatly reduce the pollutant discharge of the whole production process and reduce the cost of waste water treatment.

Description

technical field [0001] The invention relates to a method for removing impurities in the production of quartz sand, in particular to a method for removing impurities by hot alkali self-grinding in the production of high-purity quartz sand, and belongs to the technical field of quartz sand production. Background technique [0002] High-purity quartz sand is the only raw material for quartz glass, widely used in cutting-edge technologies and emerging industries such as solar energy, electronics, semiconductors, advanced electric light sources, communications, thermal instruments, laboratory instruments, optics, chemicals, national defense, metallurgy, and electrical field. [0003] The raw ores for producing high-purity quartz sand are generally high-grade industrial crystals and primary or secondary vein quartz. Usually, the film-like muddy and iron pollutants attached to the surface and cracks of the ore are the first impurities that need to be removed during the processing....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B1/00B08B3/00B08B3/02
Inventor 杜建中
Owner 江苏阳山硅材料科技有限公司
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