Process for improved precious metals recovery from ores with the

Details Process for improved precious metals recovery from ores with the Process for improved precious metals recovery from ores with the

1991-08-02

1992-06-30

Silverman, Stanley S.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209167, B03D 101, B03D 102

Patent

active

051260387

ABSTRACT:
Collector compositions for use in froth flotation processes for the benefication of precious metals i.e. gold, silver and platinum group metals (PGM) from sulfide ores containing especially pyrrite and pyrrhotite are disclosed. The collector comprises alkyl hydroxamic acids or their alkali metal or ammonium salts, preferably in combination with standard sulfide ore collectors such as xanthates etc.

REFERENCES:
patent: 4130415 (1978-12-01), Nagaraj
patent: 4324654 (1982-04-01), Rule
patent: 4629556 (1986-12-01), Yoon
patent: 4676890 (1987-06-01), Klimpel
patent: 4871466 (1989-10-01), Wang
patent: 4929343 (1990-05-01), Wang
patent: 4929344 (1990-05-01), Fleming
"Mineral Flotation with Hydroxamate Collectors", by Fuerstenau and Pradip presented at Institute of Mining & Metallurgy, Sep. 18-21, 1984, pp. 161-168.
"Application of Hydroxamic Acid and Hydroxamic-Xanthate Collector System in Metal Ore Flotation", by Dekun et al; Presented at Institute of Mining and Metallurgy, Sep. 18-21, 1984, pp. 169-172.
"The Flotation of Copper Oxidized Ores with mixed Reagents of Hydroxamates and Xanthate", by Zhou et al., Sep. 22, 1984.
"Platnum Group Elements: Minerology, Geology, Recovery", by Cabri; Canadian Institute of Mining (vol. 23) pp. 1-3.
Chem. Abstract 104:54038c, Zhou et al.

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