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High-purity quartz sand plays a vital role in high-tech industries such as semiconductors, electronics, and solar energy due to its excellent physical and chemical properties. Its purification process is a complex and delicate project involving multiple steps to remove impurities from the raw ore and obtain high-purity quartz sand. The following is a detailed description of the high-purity quartz sand purification process:
The production of high-purity quartz sand begins with the selection of high-quality raw materials. The raw materials must have high purity, low radioactivity, and low iron content. Natural quartz sand is usually used and preliminarily processed by screening, washing, grinding, etc
The raw materials are crushed by jaw crushers, impact crushers, and sand making machines to achieve a particle size suitable for subsequent processing
The crushed quartz sand is screened by a circular vibrating screen to separate qualified sand and gravel. The particle size that does not meet the requirements will be re-sent to the crushing system to form a closed loop
The screened quartz sand is cleaned to remove impurities such as stone powder and dust. When cleaning, it needs to be placed in the cleaning tank according to the process standards and cleaned with clean water
The cleaned quartz sand is flotated to further separate high-purity quartz particles. Common flotation agents include copper oxide, iron oxide and hydrofluoric acid, etc.
Quartz sand may still contain a certain amount of iron elements, which requires iron removal. Common methods include high gradient magnetic separation, wet strong magnetic separation and heavy medium separation, etc.
After iron removal, the product may still contain trace impurities and harmful elements, so it needs to be pickled. Common pickling agents include hydrochloric acid, nitric acid and hydrofluoric acid, etc.
After the above treatment steps, the quartz sand is dried to remove moisture and residual impurities
Magnetic separation and flotation are performed again to further remove impurities
10. Quartz sand packaging and storage
Finally, after manual inspection, the quartz sand is packaged and stored
The entire purification process requires not only strict operation control, but also strict inspection of product quality at each step to ensure that the final product meets high purity standards. With the advancement of technology, the purification process of high-purity quartz sand is also being continuously optimized to meet the growing market demand
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