自然科学版 英文版
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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 6    June 2018

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An effective approach for improving flotation recovery of molybdenite fines from a finely-disseminated molybdenum ore
LIN Qing-quan(林清泉)1, 2, GU Guo-hua(顾帼华)3, WANG Hui(王晖)2, WANG Chong-qing(王重庆)2,LIU You-cai(刘有才)2, FU Jian-gang(符剑刚)2, ZHU Ren-feng(朱仁锋)3

1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; 2. Jiangxi Copper Technology Research Institute Co. Ltd., Jiangxi Copper Corporation, Nanchang 330096, China; 3. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China

Abstract:An effective flotation approach is proposed for improving the recovery of molybdenite fines from a finely-disseminated molybdenum ore. To maximize the flotation recovery of molybdenum, process mineralogy of raw ore, contrast tests, optimization of operation conditions and particle size analysis were systematically investigated. Process mineralogy suggests that in the raw ore, 61.63% of molybdenite particles distribute in the <20 μm size fraction, and intergrow with muscovite and pyrite as the contained and disseminated type. Contrast tests indicate that conventional flotation responds to poor collection efficiency for particles less than 25 μm. Oil agglomerate flotation (OAF) process demonstrates an obvious superiority in improving the flotation recovery of molybdenite fines. Furthermore, the flotation results of OAF process reveal that the dosage of transformer oil plays a critical role on the average size of collected mineral particles agglomerates and the molybdenum recovery. In addition, industrial tests illustrate that compared with the Mo–S bulk flotation approach, OAF process not only increases Mo recovery and grade of molybdenum concentrate by 22.75% and 17.47% respectively, but also achieves a sulfur concentrate with a superior grade of 38.92%.

 

Key words: molybdenite fines; molybdenum ore; particle size; oil agglomerate flotation; transformer oil; froth flotation

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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