In production of cryolite by clay-bittern method,calcium chloride content in its raw material (i.e.industry salt)is high,which causes calcium oxide content in cryolite exceed the allowed figure.
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释义
黏土-盐卤法生产冰晶石,其原料工业盐中氯化钙含量高,使得冰晶石中氧化钙含量超标。
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