Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Reexamination Certificate
2007-09-26
2010-11-23
Le, Emily M. (Department: 1793)
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
C075S710000, C075S712000, C075S744000, C423S027000, C423S658500
Reexamination Certificate
active
07837760
ABSTRACT:
The invention publishes a process to increase the bioleaching speed of ores or concentrates of sulfide metal species in heaps, tailing dams, dumps, or other on-site operations. The process is characterized by the continuous inoculation of the ores or concentrates with isolated microorganisms of theAcidithiobacillus thiooxidanstype, together with isolated microorganisms of theAcidithiobacillus ferrooxidanstype, with or without native microorganisms, in such a way that the total concentration of microorganisms in the continuous inoculation flow is of around 1×107cells/ml to 5,6×107cells/ml. In particular, the invention publishes the continuous inoculation ofAcidithiobacillus thiooxidansLicanantay DSM 17318 together withAcidithiobacillus ferrooxidansWenelen DSM 16786 microorganisms, or with other native microorganisms at a concentration higher than 5×107cells/ml. In addition to the inoculation of isolated bacteria, the invention includes the addition of oxidizing agents such as the ferric ion produced externally, together with nutrients in the shape of salts of ammonium, magnesium, iron, potassium, as well as air enriched continuously with carbon dioxide to promote bacterial action in the bioleaching process of ores or concentrates.
REFERENCES:
patent: 4987081 (1991-01-01), Hackl et al.
patent: 5763259 (1998-06-01), Panos
patent: 5873927 (1999-02-01), Schaffner et al.
patent: 6110253 (2000-08-01), Kohr et al.
patent: 6207443 (2001-03-01), King
patent: 6284530 (2001-09-01), Sharp et al.
patent: 2003/0167879 (2003-09-01), Batty et al.
patent: 2004/0091984 (2004-05-01), Hunter
patent: 2005/0066773 (2005-03-01), Harlamovs et al.
patent: 2006/0094094 (2006-05-01), Sugio et al.
patent: 2007/0042482 (2007-02-01), Ohata et al.
patent: 16741997 (1997-06-01), None
patent: 02101-2005 (2006-03-01), None
patent: WO 00/71763 (2000-11-01), None
patent: WO 03/068999 (2003-08-01), None
patent: WO 2004/027100 (2004-04-01), None
Das et al., Factors affecting bioleaching kinetics of sulfide ores using acidophilic micro-organisms, 1999, BioMetals, vol. 12, p. 1-10.
English language translation of Chilean patent application CL 02101-2005 which was published on Mar. 31, 2006.
Abdel-Fattah et al. “Numerical Modeling of Ferrous-ion Oxidation Rate inAcidithiobacillus ferrooxidansATCC 23270: Optimization of Culture Conditions Through Statistically Designed Experiments.”Acta Microbiologica Polonica. vol. 51. No. 3. 2002. pp. 225-235.
Clark et al. “Biotechnology in minerals processing: Technological breakthroughs creating value.”Hydrometallurgy. vol. 83. 2006. pp. 3-9.
Espejo et al. “Bacterial Community in Copper Sulfide Ores Inoculated and Leached with Solution from a Commercial-Scale Copper Leaching Plant.”Applied and Environmental Microbiology. vol. 63. No. 4. 1997. pp. 1344-1348.
Gericke et al. “Inoculation of Heap-Leaching Operations.”Proceedings of the 16thInternational Biohydrometallurgy Symposium. 2005. pp. 255-264.
Lizama et al. “The Teck Cominco Hydrozinc™ Process.”Hydrometallurgyvol. 2. 2003. pp. 1503-1516.
Okibe et al. “Enumeration and Characterization of Acidophilic Microorganisms Isolated from a Pilot Plant Stirred-Tank Bioleaching Operation.”Applied&Environmental Microbiology. vol. 69. No. 4. 2003. pp. 1936-1943.
Rawlings et al. “Heavy Metal Mining Using Microbes.”Annu. Rev. Microbial. vol. 56. 2002. pp. 65-91.
Rawlings et al. “Biomineralization of metal-containing ores and concentrates.”Trends in Biotechnology. vol. 21. No. 1. 2003. pp. 38-44.
Sugio et al. “Existence of a Hydrogen Sulfide: Ferric Ion Oxidoreductase in Iron-Oxidizing Bacteria.”Applied&Environmental Microbiology. vol. 58. No. 1. 1992. pp. 431-433.
Tshilombo et al. “Mechanism and kinectis of chalcopyrite passivation during bacterial leaching.”Cooper 2003-Cobre 2003. vol. 4. 2003. pp. 99-116.
Uhrie et al. “The metallurgical development of the Morenci MFL project.”Cooper 2003-Cobre 2003. vol. 4. 2003. pp. 29-37.
Wood et al. “Ferrous sulphate oxidation usingThiobacillus ferrooxidanscells immobilized on sand for the purpose of treating acid mine-drainage.”Appl. Microbiol Biotechnol. vol. 56. 2001. pp. 560-565.
Chilean Mining Journal 2004. No. 279. pp. 65-80.
Badilla Ohlbaum Ricardo Badilla
Morales Cerda Pedro Antonio
Biosigma S.A.
Le Emily M.
Merchant & Gould P.C.
Wood Jared
LandOfFree
Process to increase the bioleaching speed of ores or... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process to increase the bioleaching speed of ores or..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process to increase the bioleaching speed of ores or... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4167287