北京科技大学学报2012，Vol.34Issue(7)：761-768,8.
黄铁矿促进黄铜矿微生物浸出影响因素
Influence factors of pyrite promotion on the bioleaching of chalcopyrite
摘要
Abstract
Chalcopyrite-pyrite bioleaching tests were performed with shaking flasks by Aeidithiobacillusferrooxidans. The research focused on the effects of basic salt mediums, pyrite-to-chalcopyrite mass ratio and mineral size distribution. It is found that chaleopyrite bioleaching can be promoted by pyrite, The leaching rate of copper in the iron-free 9K medium in pyrite-chaleopyrite bioleaching is 1.68 times as large as that in the 9K medium. The leaching of copper is better using a wide size range of minerals and the leaching rate of copper is related to the mass ratio of pyrite to chalcopyrite. When the mass ratio is 2： 2, the highest leaching rate of copper is ob- tained to be 45.58%. The content of pyrite is of the essence in affecting the leaching rate level of copper. At a mass ratio of pyrite to chalcopyrite no more than 5：2 the oxidation of Acidithiobacillus ferrooxidans plays an important role in the bioleaching, but when the mass ratio is 10：2 the galvanic effect between the two sulphide minerals mainly influences the bioleaehing. X-ray diffraction analyses of leaching residues indicate that the generation of jarosite in the iron-free 9K medium is less than that in the 9K medium, FeSO4 in the 9K medium can be replaced by pyrite, the galvanic effect forms with chaleopyrite, and therefore the bioleaehing efficiency of copper is increased.关键词
微生物浸出/细菌/黄铜矿/黄铁矿/铜Key words
bioleaching/bacteria/chalcopyrite/pyrite/copper分类
矿山工程引用本文复制引用
莫晓兰,林海,傅开彬,徐承焱,汪涵..黄铁矿促进黄铜矿微生物浸出影响因素[J].北京科技大学学报,2012,34(7):761-768,8.基金项目
金属矿山高效开采与安全教育部重点实验室资助项目 （）
