磷酸溶解灰岩中游离二氧化硅测试方法的改进与讨论

摘要

This paper introduces improvement of the testing method of free silica in phosphate dissolving limestone,using hot phosphoric acid to dissolve ore and fluoboric acid to depolymerize molten silicate.Then,wash the precipitation heat with sodium hydroxide solution to make free silica seperate from other minerals,and measure them by the weight method.%介绍了磷酸溶解灰岩中游离二氧化硅测试方法的改进,其利用热磷酸溶矿,氟硼酸解聚已溶硅酸,再用氢氧化钠热溶液洗涤沉淀,使游离二氧化硅与其他矿物分离,然后用重量法进行测定.