Preparation process of high-purity quartz sand

Abstract

The invention belongs to the technical field of quartz sand purification, and discloses a preparation process of high-purity quartz sand. The preparation process of the high-purity quartz sand comprises the following steps: (1) performing coarse crushing on raw ore of quartz sand; (2) putting the obtained quartz pieces into a water washing drum, then crushing the quartz pieces, introducing the crushed quartz pieces into an iron removal machine, and performing first iron removal treatment; (3) putting the obtained quartz sand after the first iron removal treatment is conducted into a water washing machine, performing water washing, and then performing fine washing treatment and dehydration; (4) drying the dehydrated quartz sand, and then cooling the dried quartz sand to room temperature; (5) introducing the cooled quartz sand into the iron removal machine, and performing second iron removal treatment; (6) putting the quartz sand obtained after the second iron removal treatment is conducted in a ball mill, performing grinding treatment, and performing third iron removal treatment after grinding is conducted; and (7) putting the quartz sand obtained after the third iron removal treatment is conducted in a crawler-type photoelectric color sorting machine, and performing color sorting. The purification process is simple, the production cost is saved, and the obtained quartz sand hashigh purity and high whiteness.

Description

technical field [0001] The invention belongs to the technical field of quartz sand purification, and in particular relates to a preparation process of high-purity quartz sand. Background technique [0002] Quartz sand is a non-metallic mineral, the main component is silicon dioxide, the color is milky white or colorless and translucent, and the aggregates are often granular, dense block, crystal cluster or cryptocrystalline stalactite. It accounts for about 60% of the rock-forming oxides in the earth's crust, so the mineral reserves are very rich and widely distributed all over the world. Domestic coastal areas are rich in reserves, and the rock types mainly include quartzite, quartz sandstone, quartz schist and gangue quartz. Ordinary quartz sand is mainly used in the construction industry. In addition, quartz sand is also widely used in casting, rubber, glass, ceramics, refractory materials, metallurgy, chemical industry, abrasives, plastics and other fields. With the im...

AI Technical Summary

Problems solved by technology

In addition, it can also be used in the production of silicone resin and solar cell substrates. It has greater demand in industries such as abrasives, fillers, coatings, and silicone rubber. The domestic production of high-purity quartz sand cannot meet market demand.

However, the existing quartz sand purification process is relatively simple, the cost is high, and its surface quality is poor. There are a large number of micropores on the surface of the prepared quartz sand, resulting in poor appearance and antifouling performance of the product.