冰晶石通常用于电冶铝,以使氧化铝还原为金属铝。使用冰晶石的经济效益取决于其分子比的大小。这一分子比是表示成品中氟化钠同氟化铝的比值。工业冰晶石中存在氟化铝是极为讨厌的,因为它会使冰晶石的热稳定性大为降低,并同时增高组分的挥发性。冰晶石分子比降低使组份的挥发性增高,这是电冶铝时氟化盐用量增加的主要原因。因此,按着现行苏联国家标准(rOCT 10561—73)严格规定,冰晶石的分子比值不得小于1.5。在苏联绝 Cryolite is commonly used in electroless metallurgy to reduce alumina to metallic aluminum. The economic benefits of using cryolite depend on the size of its molecular ratio. This ratio represents the ratio of sodium fluoride to aluminum fluoride in the finished product. The presence of aluminum fluoride in industrial cryolite is extremely annoying as it greatly reduces the thermal stability of cryolite and at the same time increases the volatility of the components. The cryolite molecular ratio decreases the volatility of the components increased, which is the main reason for the increase of the amount of fluoride salt in the electro-metallurgical aluminum. Therefore, according to the current Soviet Union national standards (rOCT 10561-73) strict rules, cryolite molecular ratio of not less than 1.5. In the Soviet Union absolutely