Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 29    No. 12    December 2019

[PDF Download]        

    

Direct leaching of molybdenum and lead from lean wulfenite raw ore
Keng XIE, Hai-bei WANG, Sheng-dong WANG

BGRIMM Technology Group, Beijing 100160, China

Abstract:A direct alkaline leaching process was proposed to extract molybdenum and lead from low-grade wulfenite ore containing 2.87% Mo and 9.39% Pb. The results show that increasing temperature and alkali concentration enhances the extraction of Mo and Pb, and more than 99.7% of Mo and 64.6% of Pb are extracted under conditions of 75 °C, L/S of 2:1, leaching time of 1.0 h, initial NaOH concentration of 80 g/L and stirring speed of 100 r/min. The alkaline leaching of molybdenum follows a chemical reaction control mechanism with activation energy of 46.3 kJ/mol. Lead in the residue is recovered by hydrochloric acid leaching. 99.8% of lead is leached under the conditions of 80 °C, [MnO2]/[Pb] molar ratio of 1.3:1, sodium chloride concentration of 40 g/L, and hydrochloric acid concentration of 3 mol/L, and a product of crystallized PbCl2 with purity higher than 99.5% is obtained after cooling.

 

Key words: wulfenite; molybdenum; lead; leaching; kinetics

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com