Improved recovery of valuable metals

摘要

The method involves adjusting pH of aqueous paste of the concentrated ore. A reducing agent is added to modify an iron hydroxide film in the surface of the sulfides containing concentrated iron ore and allows the adsorption of collector for the sulfides. A paste is added before and after the addition of reducing agent. The paste is ventilated and a gas is bubbled through the paste. The foam floatation of aqueous paste is carried out to produce foam containing minerals, such as sulphides. An independent claim is also included for a continuous flotation device.