Zinc is recovered by an integrated bioleaching, solvent extraction system where the aqueous raffinate from the solvent extraction stage is recycled to the bioleach stage.
Small magnetic particles are introduced into a solution which is subjected to a bioleaching process.
The invention discloses an additive for bioleaching that makes it possible to increase the recovery of copper from sulfide ores.
A process for the indirect bioleaching of zinc sulphide is disclosed, and includes leaching, solvent extraction, electrowinning, and oxidant regeneration steps in a closed circuit.
Also disclosed is the use of the bacteria modified according to the invention in bioleaching processes of sulphated copper, gold, uranium, nickel, zinc and cobalt ore, inter alia.
The invention likewise relates to a method for preparing said lyophilized powder product and to a method for the application of same in processes of bio-lixiviation or bio-oxidation of minerals.
The invention also relates to a process for the continuous generation of a bacterial inoculant for a process for the bio-leaching of sulphurous minerals in heaps or dumps at low temperatures.