Intendified bioleaching of low-grade molybdenite concentrate by ferrous sulfate and pyrite

Release time:2024-08-09  Hits:

• Affiliation of Author(s):冶金工程学院
• Journal:Rare Metals(SCI)
• Key Words:中文关键字：低品位钼精矿；生物氧化；强化浸出；硫酸亚铁，英文关键字：low-grade molybdenite concentrate;bio-oxidation;in
• Abstract:Intensifying effects of ferrous sulfate and pyrite on bioleaching of low grade molybdenite concentrate have been studied in this paper. The experimental results shows that the oxidation dissolution of molybdenite can be accelerated with the addition of either ferrous sulfate or pyrite in bioleaching medium. Pyrite has superior enhancing effect to ferrous sulfate, and the highest molybdenum leaching rate in pyrite added solutions is 20.85%, increasing by 12.64% as compared with that in 9K leaching system. Molybdenum leaching rate does not increase linearly with the increase of the addition amounts of either ferrous sulfate or pyrite in each type solutions. Great amounts of [NH4Fe3(SO4)2(OH)6] and [KFe3(SO4)2(OH)6] with different morphology characteristics will be deposited on molybdenite ores when the adding amounts of Fe from ferrous sulfate or pyrite exceed that from 9K leaching system by 0.5 times, and these deposits hinder the oxidation dissolution of molybdenite to some extent.
• Note:俞娟
• Co-author:Hong-YingYang,Lin-LinTong,JunZhu
• First Author:yujuan
• Indexed by:Journal paper
• Volume:卷：34
• Issue:期：3
• Page Number:页：207-214
• Translation or Not:no
• Date of Publication:2015-03-01