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TitleA laboratory and pilot plant investigation on a molybdenite ore from Pressac Molybdenite Mines Limited, Cadillac, Abitibi-East, Qubec
DownloadNot digitized. Availability
AuthorMathieu, G I; Bruce, R W
SourceCanada Mines Branch, Investigation Report IR 63-122, 1963, 42 pages, Open Access logo Open Access
PublisherCanada Department of Energy, Mines and Resources
Mediapaper; on-line; digital
File formatpdf
Released1963 01 01
Selective flotation tests on a sample of ore, assaying 0.44% MoS? and 0.07% Bi, gave a molybdenite concentrate assaying 95% MoS? and 0.4% Bi with a 93% Molybdenite recovery, and a bismuth concentrate assaying 9.2% Bi with a 75% Bi recovery. It was not possible to upgrade the bismuth concentrate further in bench-scale tests due to the small amount of material available for cleaning. The results of small scale tests were confirmed in the pilot plant investigation except that the grade of the molybdenite concentrate was reduced slightly and a larger percentage of the fine bismuth minerals were mechanically entrained in the molybdenite concentrate. The amount of copper and other impurities in the molybdenite concentrate were with, in market specifications. The molybdenite concentrate would require leaching with straight hydrochloric acid to reduce its bismuth content. Selective flotation of the bismuth minerals in the pilot plant investigation produced a bismuth concentrate assaying 44% Bi. Tabling of some of these concentrates raised the grade to 74% Bi.

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