[China Aluminum Network] Modern aluminum electrolysis plant requires alumina to have good physical properties, so that the dissolution rate of alumina in the electrolyte is faster and the sediment at the bottom of the tank is less; the fluidity is good, and it is convenient for pneumatic conveying and automatically to the electrolyzer Addition; less flying loss during feeding and transportation to reduce alumina consumption and improve the environment; strong adsorption capacity of hydrogen fluoride, can improve the effect of dry flue gas purification with alumina as adsorbent; good insulation performance, energy Forms a good crust on the electrolyte, shields the electrolyte melt and reduces heat loss; effectively protects the anodizing and reduces the anode consumption; the indicator of the physical properties of alumina used by electrolytic aluminum manufacturers is the percentage of fine particles less than 45um. . The content of less than 45um is less than 18%, while the increase in fine-grained content of less than 45um will increase the amount of dust in the electrolysis operation and affect the accurate feeding of the timing point.
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