Process process of quartz sand rod grinding-sludge-PTMS magnetic separation-flotation-acid extraction. After scrubbing, magnetic separation and flotation separation of quartz sand raw ore, more impurity mineral particles have been basically removed, and the purity of silica can generally reach 99.5-99.9% to basically meet the requirements of most industrial uses of quartz sand.
However, in order to further serve as ultra-high pure quartz sand, it is necessary to treat the impurities born on the surface of quartz particles in the form of spots and inclusions. According to the requirements of different impurity minerals for different industrial uses of quartz sand. Quartz sand to strengthen the powerful scrub-grading sludge-PTMS magnetic separation purification process.
For the structural improvement of the existing scrubbing equipment, more than 80% of the impurity iron and aluminum can be removed by dosing efficient cleaning and grading sludge, and the magnetic separation is mainly to remove the impurity containing minerals containing iron. After PTMS magnetic separation treatment, SiO299.8%, FeO30.023% and Al2O30.05% of high-quality refined quartz sand can be obtained, reaching the requirements of primary optical glass sand.
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