Biomining: Theory, Microbes and Industrial Processes by Corale L. Brierley (auth.), Douglas E. Rawlings (eds.)

By Corale L. Brierley (auth.), Douglas E. Rawlings (eds.)

Biomining is using microorganisms within the restoration of metals from ores. in the course of bioleaching, metals corresponding to copper, nickel or zinc are oxidized via microbial motion from the water-insoluble sulfide to the soluble sulfate kinds. even if gold is inert to microbial motion, microbes is usually utilized in gold restoration from specific sorts of ores simply because as they oxidize the ore, they open up its constitution, thereby permitting a gold-solubilizing agent similar to cyanide to penetrate the ore. The ebook describes a number of commercial bioleaching and biooxidation tactics in addition to the underlying conception and biology of the microbes involved.

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Ll Bioleaching of Copper 25 Fig. 1. Agglomeration drums at the Quebrada Blanca Operation, Chile. An interesting phenomenon associated with agglomeration is that some copper is liberated quickly as a result of this process. Leaching an ore in the laboratory with acid does not liberate the same quantity of copper as does the agglomeration process. The use of a binder to improve permeability of the agglomerate may be considered in the future, but there are no reports of the application of binders in copper heap leaching.

Mining Magazine, August 1996. 21. Anon. The big heap. World Mining Equipment, November 1996. 22. Pino F. Division salvador of Codelco Chile introduces the Wsx/ew process as a new line of production. Proceedings of Copper '95 Symposium. Santiago, November 1995. 23. Anon. Mina 10 aquirre sociedad minera pudahuel Itda. y cia. , Minera Chilena, July 1983. 24. Fletcher AW. Copper recovery from low-grade ore by bacterial leaching. In: Microbiological Aspects of Metallurgy, chapter 8, 1970. 25. Anon. Trends and implications of the continued developments of sx/ew copper production.

14. Bartlett RW. Simulation of ore heap leaching using deterministic models. Hydrometallurgy Vol 29. Elsevier Science Publishers, 1992. 15. Anon. Sulfuros de baja ley aporta 15 mil T/afio a Chuquicamata, Mineria Chilena, July 1994. 16. Moodry RP. Compressed air injection into a sulfide leach dump, AS 116, August 1976. 17. Trivedi NC, Tsuchiya. Microbial mutualism inleaching of Cu-Ni sulfide concen- trate. , 1975. 18. Montealegre R, Bustos S et al. Application of the thin layer process to Quebrada Blanca ores.

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