Fluid Bed Roasting Practice tn the Red Lake Camp

CIM Bulletin1961
T HREE OF the gold mines in the Red Lake Camp operate fluid bed roasters in their milling circuits. The mines are Campbell Red Lake, Cochenour Willans, and Dickenson. The roasters are used for the autogenous roasting of a flotation concentrate for subsequent gold recovery by cyanidation. Cochenour and Dickenson operate single stage reactors, whilst Campbell use a two-stage system. Ore treated by the mines is similar in that the major part of the gold is associated with arsenopyrite. Other sulphides present are pyrite, pyrrhotite, stibnite and sphalerite. Gangue minerals are mainly quartz, with carbonates and talc. Mineralization is, for the most part, extremely fine, and there is intimate association between sulphides and quartz, so . much so, that a picked specimen of apparently massive arsenopyrite will frequently contain as much as 80 per cent gangue.
Keywords: Air, arsenopyrite, roasting, stibnite, sulphur, talc, Calcine, Concentrate, Concentrates, flotation, Reactors, Roasters, Roasting, Temperature
Full Access to Technical Paper
PDF version for $20.00
Other papers in CIM Bulletin1961