Quartz sand crushing - water washing - magnetic separation - acid leaching - water washing - dehydration - drying
After the quartz sand is broken and washed with water, some impurities can be removed. Magnetic separation can remove more than 99% of mechanical iron. Acid leaching can add various acids according to actual conditions. Acid leaching equipment must be acid and alkali resistant plastic containers, stainless steel is not recommended. Some acids corrode stainless steel. If conditions permit, it is recommended to use a reactor or a container with heating and stirring for acid leaching. Make the acid leaching more thorough and the reaction more complete. Water washing also requires stirring to ensure thorough cleaning. In order to eliminate surface adsorption of quartz sand raw material "quartz stone" diatomite carrier and reduce chromatographic peak delamination, the carrier needs to be pickled before production and processing. Pickling is to soak the carrier with 6 mol/L hydrochloric acid for 2 hours or heat and soak with concentrated hydrochloric acid for 30 minutes, filter, wash with water until neutral, and dry. Pickling can remove iron and aluminum on the surface...
Fine quartz sand is a hard, wear-resistant, chemically stable silicate mineral. Its main mineral component is SiO2. The color is milky white, or colorless and translucent, hardness 7, brittle without cleavage, shell-shaped fracture, grease luster, density 2.65, bulk density (1-20 mesh is 1.6, 20-200 mesh is 1.5, its chemical , Thermal and mechanical properties have obvious anisotropy, insoluble in acid, slightly soluble in KOH solution, melting point 1750℃