安徽省沙坪沟钼矿钼的分析质量监控

通过对安徽省沙坪沟钼矿床矿石物质成分及结构、构造的分析，发现矿石中辉钼矿常呈细小鳞片状、浸染状分布于细脉中。针对岩芯易沿含矿裂纹破裂造成鳞片状辉钼矿丢失，本矿区全部采用金刚石刀具切割分取岩芯。制样过程试验中将样品无缩分粗碎、中碎至Ф〈-1．0mm，进行了K值试验，取0．5。缩分后密封棒磨6小时（充分混匀、磨碎）至-200目。分析了该矿区伴生元素不干扰测定的情况，不加Fe：O。载体，刚玉坩埚-Na2O2熔矿，降低空白值，严格质量监控，采用硫氰酸盐分光光度法测定钼量，获得的结果稳定可靠。本试验成果可为从事同类型大型钼矿的分析测试和质量监控提供参考。

Quality supervisory control for analysis of molybdenum in Shapinggou molybdenum deposit, Anhui province

By studying on the material composition,texture and structure of ores of Shapinggou molybdenum deposit, Anhui province, it is found that molybdenites in the ores often present as small scale like and dis seminated minerals distributed in veinlets. To counter the situation that the rock cores are easily disrupted along the orebearing cracks, inducing the scalelike molybdenites to be losted, the diamond cutting tools were used to cut the cores in the present experiment. In the testing of sampling preparation, the sample was processed by nonreduction primary crushing, secondary crushing to Ф〈-1.0 mm and testing of K value for sample reduction （adopted K=0.5）. Then, the reduced sample was sealed up and crushed to-200 meshes by rod milling for 6 hours （fully mixing and grinding）. As the associated elements in the ores show no interference with the determination of Mo-content, in the conditions of no addition of Fe203 carrier, melting ore with corundum crucible Na202,reducing blank values and strict quality supervisory control, the method of thiocyanate spectrophotometric analysis for determination of Mocontent gave stable and reliable results, which can provide a reference in the testing and quality supervisory control for the same type of largescale molybdenum deposits.