(1. 東北大學(xué) 材料與冶金學(xué)院，沈陽 110004；
2. 西安建筑科技大學(xué) 冶金工程學(xué)院，西安 710055)
摘 要: 對含有大量硅酸鹽類脈石礦物的低品位復(fù)雜鉬精礦的提純工藝進(jìn)行研究，通過正交和單因素實驗研究氫氟酸濃度、鹽酸濃度、溫度、處理時間和液固比對低品位復(fù)雜鉬精礦提純效果的影響。結(jié)果表明：溫度、鹽酸濃度和氫氟酸濃度對低品位復(fù)雜鉬精礦的提純效果影響顯著，最佳條件為氫氟酸濃度10%(質(zhì)量分?jǐn)?shù))、鹽酸濃度20%(質(zhì)量分?jǐn)?shù))，溫度90 ℃、時間2 h、液固比4:1。提純后鉬精礦中鉬的品位達(dá)到49.94%，較提純前鉬的品位 (25.40%)有了顯著的提高。
關(guān)鍵字: 低品位復(fù)雜鉬精礦；提純；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
