燃烧-碘量法测定钨精矿中硫含量  

Determination of Sulfur Contents in Tungsten Concentrate by Combustion-Iodometric Method

作　　者：罗燕生 石象 蔡朝娟 张文星 LUO Yansheng;SHI Xiang;CAI Chaojuan;ZHANG Wenxing(Ganzhou Metallurgy Research Institute Testing and Technology Serice Co.,Ltd.,Ganzhou 341000,Jiangxi,China)

机构地区：[1]赣州冶研所检测技术服务有限公司,江西赣州341000

出　　处：《中国钨业》2024年第2期82-85,90,共5页China Tungsten Industry

摘　　要：针对钨精矿中高含量硫缺少相应快速、准确测定方法的问题,采用燃烧-碘量法研究并确定了最佳测试条件为:碘标准滴定液的滴定度为0.02 mol/L,称样量为0.10~0.30 g;燃烧温度为1300~1350℃,燃烧时间为3~5 min;助熔剂为0.3 g钨锡粒。通过方法精密度实验和准确度实验,得到测定硫含量范围为1.00%~10.00%,该方法扩大了钨精矿中硫含量的检测范围。因此,燃烧-碘量法操作快速简便,测定结果准确,适用于钨精矿中高硫含量的测定。In response to the lack of corresponding rapid and accurate determination methods for high sulfur contents in tungsten concentrate,the combustion-iodometric method was used to study and determine the testing conditions as follows:the titration degree of iodine standard titration solution is 0.02 mol/L,and the sample size is 0.10-0.30 g;the combustion temperature is 1300-1350℃,and the combustion time is 3-5 minutes;the flux is 0.3 g tungsten tin particles.Through precision and accuracy experiments,the determination range of sulfur contents in tungsten concentrate was expanded to 1.00%-10.00%.This method is quick and easy to operate,and is suitable for the determination of high sulfur contents in tungsten concentrate.

关 键 词：燃烧-碘量法 钨精矿 硫测定 

分 类 号：O657.31[理学—分析化学]