FLOTATION SEPARATION OF ARSENOPYRITE FROM PYRITE
1. A froth flotation process for effecting separation of arsenopyrite mineral from pyrite mineral comprising conditioning at pH less than 8 and at a temperature of at least 30#176;C an aqueous pulp containing particles of said arsenopyrite and pyrite minerals, the conditioning being conducted with a sulfitic depressing agent providing HSO 3 ions added to said pulp in a quantity sufficient to