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一、序言从我国和世界各地工业磷块岩的矿物化学资料表明,除近代海岛上的少数鸟粪层外,氟是各地区磷块岩的基本组分之一,一般含量在2.5—3.5％之间。关于氟对磷酸盐矿物所起的固定作用,已成为大家共同的看法。对于磷块岩的脱氟过程,已成为人们在利用磷块岩方面的重要问题。在某些地区由于饮水中合氟量超过了一定限度而有害于居民的健康,为此,H.爱尔特等曾做了以磷酸三钙使水中氟除去的试验。
I. Preface From the mineral chemistry data of industrial phosphorite rocks in China and other parts of the world, it shows that fluoride is one of the basic components of phosphorite in all areas except for a few guano layers in the modern island. Generally, it is 2.5-3.5% between. Fluorine on the phosphate mineral fixed role has become common to everyone. Defluorination of phosphorite has become an important issue for people to utilize phosphorite. In some areas due to fluoride in drinking water exceeds a certain limit and harmful to the health of residents, therefore, H. Alter had done with tricalcium phosphate in water to remove fluoride test.