铝工业对工业冰晶石所提出的要求之一,是NaF/AlF_3分子比为2.5～3.0和SiO_2的含量要低。目前,工业冰晶石的生产是根据苏联国家标准(ΓОСТ 10561—73)进行的,按此要求NaF/AlF_3分子比应不小于1.5,而最低等级中的SiO_2含量不大于1.5％。工业冰晶石的NaF/AlF_3分子比的实际数值为1.5～1.8。南乌拉尔冰晶石厂和敖德萨拉磷酸盐厂生产的高分子比冰晶石试制性批样,其SiO_2含量 One of the requirements set by the aluminum industry for industrial cryolite is that the NaF / AlF 3 molar ratio is 2.5 to 3.0 and the content of SiO 2 is low. At present, the production of industrial cryolite is carried out according to the national standard of the Soviet Union (ΓОСТ 10561-73), according to which the molecular ratio of NaF / AlF_3 shall not be less than 1.5 and the minimum level of SiO_2 is not more than 1.5%. Industrial cryolite NaF / AlF_3 molecular ratio of the actual value of 1.5 to 1.8. South Ural cryolite plant and Odessa La phosphate plant production of cryolite experimental batch samples, the SiO 2 content