Wet-process preparation method and production line of high-purity quartz sand

Abstract

The invention provides a wet-process preparation method and a production line of high-purity quartz sand. According to the preparation method and the production line, coarse crushing and screening treatment, fine crushing and screening treatment, magnetic separation treatment, scrubbing treatment, flotation treatment, gravity separation and dehydration treatment are included. An automatic continuous production line can formed by connecting the links mentioned above in series so that the continuous high-efficiency production of the quartz sand can be implemented. Meanwhile, because the links of fine crushing and screening treatment, magnetic separation treatment, scrubbing treatment, flotation treatment and gravity separation are carried out in a mortar state, and all belong to wet-process sand making, energy consumption for sand making is reduced, and the environmental pollution is reduced. Besides, the concentration of mortar is controlled in each link of wet-process sand making, the treatment effect of each link is ensured, the impurity content of the quartz sand can be smaller than 50 ppm through the links of multi-stage magnetic separation, multi-stage flotation and gravity separation, and the impurity content can be further lowered to be smaller than 30 ppm.

Description

technical field [0001] The embodiments of the present disclosure generally relate to the technical field of non-metallic ore beneficiation and processing, and more specifically, relate to a wet preparation method and production line of high-purity quartz sand. Background technique [0002] High-purity quartz sand refers to a high-purity non-metallic mineral raw material with a certain particle size produced from natural quartz minerals through a series of physical and chemical purification techniques. Harben (2002) classified processed quartz according to the total amount of impurities according to the purity of commercial quartz products. In Harben's (2002) classification scheme, quartz with a total amount of impurity elements below 50 μg / g is defined as a high-grade quartz material, including high-purity quartz (High Purity Quartz, total amount of impurity elements: 8-50 μg / g), super Ultra High Purity Quartz (Ultra High Purity Quartz, total amount of impurity elements: 1-...

AI Technical Summary

Problems solved by technology

However, this dry sand making technology has high energy consumption and serious dust pollution.

In addition, the magnetic separation and flotation process of the existing technology has a poor effect on separating impurity minerals; and the existing technology cannot be continuously produced and has low efficiency, which is also an important aspect of my country's high-purity quartz sand production technology lagging behind the international advanced level for a long time

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