Improved bacterial oxidation of ores and sulfur concentrates

摘要

Procedure for the bacterial oxidation of ores and sulphide concentrates, characterized in that the ore or concentrate is leached with a mixed bacterial culture operating over a temperature range of between 45 and 65 ° C and at a pH of between 0.8 and 2, 5, the bacterial culture having been adapted to the ore or concentrate before leaching, and in which the mixed bacterial culture comprises Sulfobacillus thermosulfidooxidans, Thiobacillus caldus and Thiobacillus ferrooxidans