| 摘要 |
The invention relates to a method for a continuous bioleaching of a metal containing sulphidic materials. Such a material in the form of a pulp or slurry is fed to a main circuit, where a bioleaching is performed in one or more stages with a culture of microorganisms which is suitable as regards the ingoing materials. A material having the ability to promote growth of microorganisms suitable for the bioleaching in the main circuit is fed to a side circuit for the generation of such microorganism. The content from the side circuit is fed to the main circuit in a predetermined flow so that an activity high enough is obtained in the culture in this circuit also at staying times shorter than the critical as should prevail without such an addition. The leaching in the main circuit is, thus, allowed to be controlled of the oxidation degree and temperature, so that a selective oxidation of different ingoing materials is allowed as well as the achievement of a predetermined oxidation ratio of the outgoing material from the main circuit. A separated leaching residue from this material is withdrawn having an oxidation ratio suitable for a following metal winning process. |
