Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1986-02-07
1988-03-22
Stoll, Robert L.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75118R, 75121, 423 22, 423 27, 423DIG17, 266168, 435262, C22B 1104
Patent
active
047326085
ABSTRACT:
A method and attendant apparatus for use in bioleach processing of metal-bearing solids is disclosed. The method includes the placement into a tank of metal-bearing solids, a predetermined quantity of water, oxygen, carbon dioxide, nutrients and a species of microorganisms capable of oxidizing some portion of the metal-bearing solids and obtaining energy for growth from that oxidation. The slurry formed by this placement is continuously filtered to remove process delimiting metabolic end products produced by the oxidation reaction. The ratios of the various slurry components are monitored and controlled to effectuate an optimized environment for oxidation to occur. The attendant apparatus includes a means of introducing oxygen into the bottom of the reactor vessel in the form of small widely dispersed bubbles.
REFERENCES:
patent: 2829964 (1958-04-01), Zimmerley et al.
patent: 3433629 (1969-03-01), Imai et al.
patent: 4571387 (1986-02-01), Bruynesteyn et al.
Tuovinen, D. H. and Kelly, D. P., "Use of Micro-Organisms for the Recovery of Metals", International Metallurgical Reviews, Review 179, 1974, vol. 19, pp. 21-31.
Emmett, Jr. Robert C.
O'Connor Lawrence T.
Envirotech Corporation
Stoll Robert L.
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