Method of extraction of metals from minerals

Details Method of extraction of metals from minerals Method of extraction of metals from minerals

C - Chemistry, Metallurgy

22

B

C22B 3/18 (2006.01)

Patent

CA 2327532

Essence of the invention: mineral raw materials were leached in presence of a leaching agent. A biomass of microorganisms with heterotrophic type of metabolism grown in a nutrient medium was used as a leaching agent. The microorganisms were selected from natural materials. Leaching was carried out with consumption of biomass not less than 3 . 10-3 kg on 1 kg of mineral row material. Acetic bacteria, pseudomonas, sulfuric bacteria were used as microorganisms with heterotrophic type of metabolism. A water solution of higher carbohydrate polymers was used as a nutrient medium. A mineral additive was additionally introduced into the nutrient medium, and phosphate of ammonia, ammonium chloride or mixture thereof, or sodium chloride was used as the mineral additive. Vegetal remains, sawdust, cane, sedge, household wastes were used as the higher carbohydrate polymers. 8 dependent claims, 4 tables.

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