Quartzite silicon feedstock include glass, quartz sandstone, vein quartz, synthetic quartz silica sand processed and deposited from chert weathering natural quartz sand (i.e., silica sand). Silica represented by sandstone has a high silica content. The beneficiation process mainly involves crushing and grading, and various granular products suitable for industrial requirements are obtained. Natural silica sand because it often contains a lot of dirt and impurities, mainly mineral grading desliming iron with high amount of aluminum is required by flotation or magnetic separation to remove impurities therein. Part of the better quality pulse quartz can be used instead of crystal material to produce quartz glass. This material sometimes needs to be purified by acid ore separation.
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