过磷酸钙生产中的含氟废气用水吸收形成氟硅酸 ,并与氯化钠溶液反应生成氟硅酸钠。年产 1 0万吨过磷酸钙副产 40 0吨氟硅酸钠 ,母液量年近 60 0 0吨 ,洗涤量则有 1 2 60 0吨 /年。母液中 HCl的含量平均 3%左右 ,洗涤液中 HCl含量仅为 0 .2 %。我公司过磷酸钙生产是稀酸矿粉法 , The fluorine-containing waste gas in the production of superphosphate is absorbed by water to form fluorosilicic acid and reacts with the sodium chloride solution to form sodium fluorosilicate. The annual output of 40,000 tons of sodium fluosilicate is 10 million tons of superphosphate, nearly 60,000 tons of mother liquor and 12,000 tons of laundry per year. The mother liquor HCl content of about 3% on average, the washing liquid HCl content of only 0.2%. My company is the production of superphosphate slag acid method,