A color-magnetic separation combined separation method for producing high-purity quartz sand from quartz rock

Abstract

The invention discloses a color-magnetic separation combined sorting method for high-purity quartz sand produced through quartzite. The method comprises the steps of adopting a crushing-ore washing technology to crush quartzite ore into 1.5-to-2.5 cm blocks, and carrying out ore washing through adopting a cylindrical rotating screen or a linear vibration screen; carrying out roughing and purification on the washed ore through utilizing a color sorter; after parts of a high-quality raw material are selected, carrying out ore grinding, desliming and classification; controlling the particle size of the material at 20 to 140 meshes, and carrying out secondary deironing purification on the part of material through utilizing a vertical ring pulsating high gradient magnetic separator; and after concentrating an obtained product, stacking the product, and carrying out natural dehydration to obtain the high-purity quartz sand. According to the method, adopted technologies belong to physical beneficiation, any chemical substance does not need to be added, and the method is safe and efficient to operate, good in working environment and free of tailing discharge; environmental pollution is avoided; and the method has wide application prospect in high-purity quartz sand manufacturing under the situation that high-quality ore resources are exhausted day by day.

Description

technical field [0001] The invention relates to a production process of quartz sand, in particular to a color-magnetic separation combined separation method for producing high-purity quartz sand from quartz rock. Background technique [0002] Due to its good thermal stability, light transmittance, high temperature resistance and corrosion resistance, the application field of quartz sand has gradually extended from glass, casting, ceramics and refractory materials, metallurgy and plastic industries to photovoltaic, aviation, electronics and other fields. The quality requirements of quartz sand in these fields are getting higher and higher, but good quartz ore resources such as crystal and vein quartz are gradually decreasing. How to use advanced processing technology to process and purify ordinary quartz rock is very important. Quartz sand itself is a cheap resource, and the processing cost is limited. Traditional purification methods such as scrubbing, acid leaching, and flo...

AI Technical Summary

Problems solved by technology

Quartz sand itself is a cheap resource, and the processing cost is limited. Traditional purification methods such as scrubbing, acid leaching, and flotation often need to add chemicals to the purification process, which not only has high production costs, but also has hidden dangers in environmental protection. The products that come out are not favored by users because of the residual additives, and a single magnetic separation usually requires multiple separations to achieve the desired effect, requiring a large investment in equipment