TY - JOUR T2 - Journal of Mining and Metallurgy, Section B: Metallurgy TI - Selective leaching of Mo from an off-grade gravity lead concentrate in Na2CO3 solution VL - 55 IS - 2 SP - 253 EP - 259 PY - 2019 DO - 10.2298/JMMB181128027L AU - Z.-X. Liu AU - Y.-T. Luo AU - W.-B. Luo AU - B.-X. Li AU - X.-W. Wu AD - a The Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology, Jishou University, Jishou, PR China b College of Physics, Mechanical and Electrical Engineering, Jishou University, Jishou, PR China c National Demonstration Center for Experimental Chemistry Education, Jishou University, Jishou, PR China d Key Laboratory of Mineral Cleaner Production and Exploit of Green Functional Materials in Hunan Province, Jishou University, Jishou, PR China AB - The selective leaching of Mo from an off-grade gravity lead concentrate was investigated in Na2CO3 solution using air as an oxidant. The leaching behaviors of Mo and Pb were predicted by the thermodynamic phase diagrams of Pb-Mo-C-H2O system. The oxidation mechanisms of those sulfides in the off-grade gravity lead concentrate were confirmed by the methods of X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS). The influence of operating factors on the leaching behaviors of Mo and Pb, including Na2CO3 concentration, liquid-to-solid ratio, temperature, and leaching time, were studied. Under these optimum leaching conditions (Na2CO3 2 M, leaching time 8 h, temperature 75o C, air-flow rate 2.0 m3/h and L/S ratio of 10/1 mL/g), the extraction of Mo and Pb was up to 97.70 and 0.73 %, respectively. KW - Gravity lead concentrate KW - Molybdenite KW - Selective leaching KW - Air oxidation KW - Na2CO3 N1 - Correspondence Address: Z.-X. Liu, The Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology, Jishou University, Jishou, PR China email: liuzhxi@sina.com N1 - J. Min. Metall. Sect. B-Metall. 55 (2) B (2019) 253-259. DOI:10.2298/JMMB181128027L PB - Technical Faculty in Bor SN - 14505339 (ISSN) LA - English J2 - J. Min. Metall. Sect. B Metall. M3 - Article ER