摘要
用硝酸、氢氟酸溶解样品,加入过量氟化钾生成氟硅酸钾沉淀,过滤后加热水使氟硅酸钾水解,用氢氧化钠标准溶液滴定产生的氢氟酸,计算样品中二氧化硅的含量。氟硅酸钾容量法测定高炉渣中的二氧化硅含量,分析精度高,速度比高氯酸脱水重量法快,是一种较好的高炉渣二氧化硅分析方法。
A sample dissolves with nitric acid and hydrofluoric acid,and is added with excessive potassium fluoride.Then the product,potassium fluosilicate precipitate is filtered and dissolves with hot water.The formed hydrofluoric acid is titrated with standard sodium hydroxide solution and used for the calculation of silicon dioxide content.Potassium fluosilicate volumetric method for measuring silicon dioxide content in BF slag shows a high analysis precision and is faster than perchloric acid dehydration gravimetric method.To sum up,it is a good method for measuring silicon dioxide content in BF slag.
出处
《天津冶金》
CAS
2011年第4期56-58,70,共3页
Tianjin Metallurgy
关键词
氟硅酸钾
容量法
高炉渣
二氧化硅
测定
potassium fluosilicate,volumetric method,BF slag,silicon dioxide,measurement
