钨多金属矿石中钨物相分析检测研究

Tungsten Phase Analysis and Detection of Tungsten Polymetallic Ore

研究了氨水对钨华、柠檬酸-盐酸混合溶液对白钨的浸取条件,及在不同条件下连续浸取分相后浸出液中三氧化钨含量的变化。绘制三氧化钨在0~240.00μg/50 mL和0~1800.00μg/100 mL的两条标准工作曲线,检出限0.0021μg/mL,线性范围0.0069~18.00μg/mL;浸出液中的钨离子,采用硫氰酸盐光度法,在波长401 nm处直接测定钨的吸光度,快速测定了钨华、白钨、黑钨中三氧化钨的含量。样品测定结果RSD(n=11)在0.3%~4.9%之间,实验室间比对测定结果一致。

The leaching conditions of tungstite using ammonia solution and scheelite using citric acid-hydrochloric acid mixed solution were studied,and the changes of tungsten trioxide content in the leaching solution were investigated after continuous leaching and phase separation under different conditions.Two standard working curves of tungsten trioxide at 0~240.00μg/50 mL and 0~1800.00μg/100 mL were drawn,the limit of detection was 0.0021μg/mL,the linear range was 0.0069~18.00μg/mL.The tungsten ions in the leaching solution were directly measured by thiocyanate spectrophotometry at a wavelength of 401 nm to quickly determine the content of tungsten trioxide in tungstite,scheelite,and black tungsten.The RSD(n=11)of the sample determination results is between 0.3%and 4.9%,and the inter-laboratory comparison results were consistent.