Biological leaching of manganese ores.
Noble EG; Baglin EG; Lampshire DL; Eisele JA
1991 SME Annual Meeting, February 25-28, 1991, Denver, Colorado. Littleton, CO: Society for Mining, Metallurgy & Exploration, preprint 91-189 1991 :1-14
The U.S. Bureau of Mines is investigating microbial leaching as a method for recovering the metal values from a domestic low-grade manganese wad ore. Early work showed that heterotrophic microorganisms present in the ore solubilized manganese when cultured in a glucose-mineral salts medium. More recent shake-flask tests using molasses as the sole nutrient source extracted 97 pct of the manganese from minus 300-um ore in 4 weeks. Column bioleaching with the molasses medium solubilized 99 pct of the manganese from minus 6.3-mm ore in 50 weeks. The results of flask, column, and laboratory-scale heap bioleaching studies are presented.
OP; Conference/Symposia Proceedings
1991 SME Annual Meeting, February 25-28, 1991, Denver, Colorado, preprint 91-189