Method for segregating metals and minerals from one another by leaching

a technology of metals and minerals, applied in the field of segregating metals and minerals from one another, can solve the problems of reducing the profitability of bioprocesses, low extraction degree, and toxicity of processes, and achieves the effect of reducing the cost of bioprocessing, reducing the degree of extraction of metals, and reducing the degree of extraction
US20020037245A1Inactive Publication Date: 2002-03-28FA BIOMEDY
0 Cites 4 Cited by

Patent Information

Authority / Receiving Office
US Β· United States
Current Assignee / Owner
FA BIOMEDY
Publication Date
2002-03-28
Estimated Expiration
Not applicable Β· inactive patent
Patent Text Reader

Abstract

A method for extracting metals from minerals is provided that involves the leaching of metals with a leaching agent comprised of a biomass of microorganisms having a chemo-organotrophic type of exchange which are grown in a nutrient medium. The microorganisms having chemo-organotropic type of exchange are selected from natural materials and may include acetic bacteria, pseudomonades, and sulfuric bacteria. The leaching is carried out with the consumption of biomass not less than 3x10-3 kg per 1 kg of mineral raw material. A water solution of higher carbohydrate polymers is used as a nutrient medium and a mineral additive may be added thereto. Phosphate of ammonia, ammonium chloride, a mixture of phosphate of ammonia and ammonium chloride, or sodium chloride is used as the mineral additive. Vegetative residues, sawdust, cane, sedge, and household wastes are used as the higher carbohydrate polymers.
Need to check novelty before this filing date? Find Prior Art

Description

BACKGROUND OF THE PRESENT INVENTION

[0001] The present invention relates to a method for segregating metals and minerals from one another and, in particular, to a method for segregating metals such as silver and gold from minerals in connection with mining and other industries.

[0002] One conventional method for extracting metals from minerals is described in Design And Operation Of A Commercial Bacterial Oxidation Plant At Fairview / Tub Asweden P.C., Marais H. Y., Haines A. K. Marshalltown, 1988 (12 pages) and involves leaching by autotrophic acidophilic microorganisms Thiobacillus ferrooxidans with subsequent cyanidation of the leaching products. However, this method has the disadvantages of yielding only a low degree of extraction and of having a toxicity associated with the process.

[0003] Another conventional method for extractions of metals from minerals is described in Mining Journal, 1990, Vol. 314, No. 8068, pages 335-337 and involves leaching by the microorganisms Thiobacillus...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More