The Treatment of Refractory Ores at the Hard Rock Gold Mine

CIM Bulletin1941
C. H. MADSEN
THE Hard Rock gold mine is in the Little Long Lac mining area, Thunder Bay district, northwestern Ontario. It is four miles by road from the town of Geraldton, which is on the Canadian National railway, 180 miles northeast of Port Arthur.
Keywords: arsenopyrite, copper sulphate, cyanide, sulphur, unit cell, Calcine, Concentrate, Concentrates, flotation, Gold, Ore, Ores, Roasters
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