Method for preparing high purity quartz sand
A technology of high-purity quartz sand and quartz sand is applied in the field of preparing quartz sand suitable for the production of polycrystalline silicon materials by physical method, which can solve the problems of high concentration, difficult to achieve, and unattainable preparation of polycrystalline silicon and monocrystalline silicon, etc. Decontamination effect, effect of increasing solubility
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[0022] Embodiment 1: This example is carried out according to the following steps,
[0023] (1) Roughing: remove obvious impurities and foreign matter in various quartz ore;
[0024] (2) Crushing: use a professional crusher to crush the quartz ore to particles with a particle size of 1-20mm;
[0025] (3) Roasting: using a professional roasting furnace, the natural silica is roasted at 900 ° C for 2 hours;
[0026] (4) Water crushing: After taking out the burned silica, put it in a clean container with cold water, and cool it quickly to achieve the purpose of removing bubbles, hydrology and some encapsulated impurities inside the minerals, so that the minerals are cracked, and the Silica is broken into 2.5mm blocks;
[0027] (5) Pulverization: The water-crushed blocks are dried in an oven at room temperature, then mechanically crushed by wet or dry grinding, and finally crushed into ultra-fine quartz sand of 5-50 μm in a jet mill.
[0028] (6) Magnetic separation: use high g...
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