| 摘要 |
<p>A nickel concentrate is recovered from nickel sulphide ores or concentrates by froth flotation of an aqueous pulp of the ground ore or concentrate, preferably containing 20-45% solids, by weight, by the steps of adjusting the pulp pH to 9-10, adding cyanide ions in an amount sufficient to depress all the sulphide mineral content of the pulp, conditioning the pulp for the flotation of nickel sulphide, adding a strong sulphhydryl collector, e.g. potassium amyl xanthate, to the pulp in an amount sufficient to float the nickel sulphide, and floating and removing the nickel sulphide. Pentlandite, chalcopyrite and pyrrhotite present are successively floated by progressively increasing the redox potential of the pulp.</p> |
