High purity quartz sand generally refers to the quartz micropowder with SiO2 content higher than 99.9%, mainly used in IC integrated circuit and quartz glass and other industries, its advanced products are more widely used in large-scale and super-large scale integrated circuit, optical fiber, laser, aerospace, military. Take the chlorine gas. , Sodium chloride, ammonium chloride and quartz sand heating together, so that the iron in the sand into FeCl3 gas volatilization, and then use PTMS magnetic separation to achieve the purpose of iron removal.
High purity quartz sand is a neutral inorganic filler, which does not contain crystalline water, and does not participate in the chemical reaction of the filling material. It is a very stable mineral filler. Using PTMS magnetic separation iron removal to obtain high purity quartz sand is widely used in plastics, rubber, ceramics and coatings, which can increase various new functions of products, but also can save a lot of raw materials.
The test showed that the microbial A. niger strains could remove iron from quartz sand, but the treatment time was longer. Various physical-mechanical and chemical methods can be used alone or in combination to remove iron from quartz sand, and the efficiency of PTMS magnetic separation is largely dependent on the nature of the mineral feedstock.
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