摘要
试样用混合熔剂熔融，稀盐酸浸取酸化、定容，移取部分试液，通过控制分析时各元素的酸度，分别用硅钼蓝光度法测定SiO2、EDTA滴定法测定MgO、强碱沉淀分离氟化盐置换EDTA滴定法测定Al2O3、EDTA滴定法测定CaO总量。利用CaO易被稀乙酸溶解，而CaF2不溶解于稀乙酸的特性^[1]，另称取一份试样用稀乙酸处理过滤后，将滤液定容，移取部分滤液，用EDTA滴定法测定CaO量。从CaO总量中减去CaO量之差，再乘以1．39即为试样中CaF2的含量。
The sample was made by mixed flux, the melting was leached with dilute hydrochloric acid, and some test solution was taken after the volume determination, then by controling the acidity of each element during the analysis, SiO2 was measured by silicon molybdenum blues photometry, MgO was measured by EGTA titration, Al203 was measured by precipitation separation-of fluoride salt by strong alkali and EDTA titration and the total amount of CaO was measured by EGTA titration. Using characteristics that CaO was easy to be dissolved by diluent acetate and the CaF2 was difficult to be dissolved by diluent acetate, the other sample was weighed, treated by diluent acetate and filtered, then some test solution was taken after the volume determination, CaO was measured by EGTA titration. The amount of CaF2 could be obtained by the 1.39 timeing the difference between the total amount of CaO and the content of CaO.
出处
《莱钢科技》
2011年第5期58-61,共4页
Laigang Science & Technology
