高铝质耐火材料中SiO_2的解聚-钼蓝光度法测定

Determination of silica in high alumina refractories by deploymerization molybdenum blue photometric method

对SiO2 含量低于 30 %的高铝质耐火材料中SiO2 的解聚 -钼蓝光度测定方法进行了研究。结果表明 :氟化钾是最佳的解聚剂 ,氟化钾 (2 0g·L- 1 )和硼酸 (2 0g·L- 1 )的用量分别为 5 .0mL和 7.5mL。本方法准确可靠 ,重复性好 ,可以用于SiO2 含量低于 30 %的高铝质耐火材料中SiO2 的测定 ,结果令人满意。

The determination of silica was investigated using the molybdenum blue photometric method.The result shows that KF is the best deploymerization regent,and the addition of potassium fluoride(20 g·L -1)and boric acid(20 g·L -1)is 5.0 mL and 7.5 mL respectively.The method is accurate and repetitious,and it can be applied to the determination silica content in the high alumina refractories containing less than 30% SiO 2,with satisfactory results.