(1. 东北大学 材料与冶金学院，沈阳 110004；
2. 西安建筑科技大学 冶金工程学院，西安 710055)
摘 要: 对含有大量硅酸盐类脉石矿物的低品位复杂钼精矿的提纯工艺进行研究，通过正交和单因素实验研究氢氟酸浓度、盐酸浓度、温度、处理时间和液固比对低品位复杂钼精矿提纯效果的影响。结果表明：温度、盐酸浓度和氢氟酸浓度对低品位复杂钼精矿的提纯效果影响显著，最佳条件为氢氟酸浓度10%(质量分数)、盐酸浓度20%(质量分数)，温度90 ℃、时间2 h、液固比4:1。提纯后钼精矿中钼的品位达到49.94%，较提纯前钼的品位 (25.40%)有了显著的提高。
关键字: 低品位复杂钼精矿；提纯；浸出
（1. School of Materials and Metallurgy , Northeastern University , Shenyang 110004 , China;
2. School of Metallurgy Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China）
Abstract:A purification process for low-grade complex molybdenite concentrates containing plenty of silicate gangue minerals was investigated. The effects of the concentrations of hydrofluoric acid and hydrochloride, temperature, treating time, liquid-solid ratio on the refining rate of molybdenite concentrates were investigated by the orthogonal test and single factor test. The results show that temperature, hydrochloride concentration, hydrofluoric acid concentration have significant effects on the refining rate of the low-grade molybdenite concentrate, and the optimum conditions are as follows: the concentrations of hydrofluoric acid and hydrochloride are 10% (mass fraction) and 20% (mass fraction), temperature, leaching time and liquid-solid ratio are 90 ℃, 2 h and 4:1, respectively. The grade of molybdenum in molybdenite concentrate is thus up to 49.94% after the purification processes, which is evidently higher than that in the molybdenite concentrates (25.40%) before the purification processes.
Key words: low-grade molybdenite concentrate; purification; leaching
