Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1994-11-29
1996-07-16
Bos, Steven
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
423 30, 423 41, C22B 1100
Patent
active
055364802
ABSTRACT:
Provided is a process for treating refractory precious metal-containing ores, particularly gold-bearing ores, which are refractory due to the presence of organic carbon, to reduce the ability of organic carbon to interfere with recovery of the precious metal. The ore may also contain sulfide materials with which the gold is associated and from which the gold is difficult to separate. The ore is comminuted to a size at which at least about 80 weight percent of the ore is smaller than about 40 microns in size. The comminuted ore is then slurried and subjected to pressure oxidation at severe operating conditions. The treating temperature is greater than about 190.degree. C. When sulfide minerals are present, substantially all of the sulfide sulfur must first be oxidized prior to obtaining significant benefit from the treatment of the organic carbon. Greater than about 96% of the sulfide sulfur must be oxidized.
REFERENCES:
patent: 2777764 (1957-01-01), Hedley et al.
patent: 4289532 (1981-09-01), Matson et al.
patent: 4405569 (1983-09-01), Dienstbach
patent: 4552589 (1985-11-01), Mason et al.
patent: 4571263 (1986-02-01), Weir et al.
patent: 4571264 (1986-02-01), Weir et al.
patent: 4578163 (1986-03-01), Kunter et al.
patent: 4632701 (1986-12-01), Genik-Sas-Berezowsky et al.
patent: 4731114 (1988-03-01), Ramadorai et al.
patent: 4738718 (1988-04-01), Bakshani et al.
patent: 4923510 (1990-05-01), Ramadorai et al.
patent: 4941917 (1990-07-01), Cenegy et al.
patent: 4979986 (1990-12-01), Hill et al.
patent: 4979987 (1990-12-01), Mason et al.
patent: 5071477 (1991-12-01), Thomas et al.
patent: 5232491 (1993-08-01), Corrans et al.
Jha, C., "Refractoriness of Certain Gold Ores to Cyanidation: Probable Causes and Possible Solutions," Mineral Processing and Extractive Metallurgy Review, vol. 2, pp. 331-352, Gordon and Breach, Science Publishers Ltd., (Great Britain 1987), no month.
St. Louis, R. M. et al., "Recovery Enhancement in the Mercur Autoclave Circuit", Proceedings of The Gold '90 Symposium, Salt Lake City, Utah, Feb. 26 to Mar. 1, 1990, pp. 443-450, Society for Mining Metallurgy and Exploration, Inc. (Littleton, Colorado 1990), Mar.
Fridman, I. D. et al., "Treating Carbon Containing Ag-Au-As Concentrates," World Mining, vol. 36, pp. 45-47 (Jul., 1983).
Shoemaker, R. S. et al., "Refractory Gold Ore Processing," Advances in Gold and Silver Processing, Proceedings of The Symposium at GoldTech 4, Reno, Nevada, Sep. 10-12, 1990, pp. 113-118, Society for Mining Metallurgy and Exploration, Inc. (Littleton, Colorado 1990), Sep.
Bos Steven
Santa Fe Pacific Gold Corporation
LandOfFree
Method for treating mineral material having organic carbon to fa does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for treating mineral material having organic carbon to fa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for treating mineral material having organic carbon to fa will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1782726