Milling a Gold-Bearing Pyrrhotite Ore at Delnite Mines

This paper describes the problems encountered and the steps taken to solve them in milling an ore containing relatively large amounts of pyrrhotite. A complex and greatly lengthened flotation circuit was required to recover the pyrrhotite. A very low pH had to be maintained in the cyanide circuit in order to get good recovery of the gold and maintain reasonable cyanide recovery.
Keywords: cyanide, Cyanide Tail Assay, Gold-Bearing Pyrrhotite Ore, pH, potassium permanganate, schist, Mill, Mills, Ore, Ores, pH, pyrrhotite, Shafts
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