化学物相法测定矿石中红柱石的含量  

Determination of Andalusite Content in Ores by Chemical Phase Analysis Method

作　　者：邢谦 董迈青 谢海东 李守文 周蔚 

机构地区：[1]青海省岩矿测试应用研究所,青海西宁810008 [2]青海省环境地质勘查局,青海西宁810007

出　　处：《岩矿测试》2008年第5期379-382,共4页Rock and Mineral Analysis

摘　　要：对化学物相法分析矿石中红柱石的含量作了初步探讨。试样经氢氟酸冷浸12 h,过滤后残渣用过氧化钠熔融,热水提取,用乙酸锌标准溶液滴定三氧化二铝含量,最后以三氧化二铝的含量换算成红柱石的含量。结合青海乐都矿区红柱石与其伴生矿物的组成特点,试验了排除其他含铝矿物的工作条件与红柱石的溶解特性,并用人工模拟样品中的红柱石溶解率求得校正系数,确定了铝量法作为矿区红柱石化学物相分析方法。The preliminary discussion on the determination of andalusites content in ore samples by chemistical phase analysis method is proposed. The sample was treated with HF-cold dissolution method. Then the residue was filtered and fused with Na2O2 and extracted with hot water. The concentration of Al2O3 was determined by titration method with zinc acetate standard solution and converted into the content of andalusite. Based on the compositional characteristics of andalusite and its associated minerals in Yuedu ore region of Qinhai Province, the effects of experimental conditions including different solvents, dosage of solvents, soaking temperature and time, sample granularity on sample dissolution rate were studied in details. And the correction coefficient was calculated based on the dissolution rate of andalusite in synthesized samples. The aluminiumimetry is chosen as the chemical phase analysis of andalusite in ores.

关 键 词：红柱石 化学物相分析 溶失校正 

分 类 号：O655.2[理学—分析化学] P578.945[理学—化学]