Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group va metal or arsenic
Patent
1996-02-27
1998-06-09
Bos, Steven
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group va metal or arsenic
423 87, C01G 300, C01G 2800
Patent
active
057628912
ABSTRACT:
The present invention is a method to remove arsenic from arsenic-containing materials, such as an ore or concentrate, by roasting the arsenic-containing material to convert arsenic sulfides into arsenic oxides. The arsenic oxides are contained in the roasted arsenic-containing material. The roasted arsenic-containing material is contacted with a lixiviant to solubilize the arsenic in the oxide in a pregnant leach solution. Ferric arsenate, an environmentally stable compound, is formed in the lixiviant. The ferric arsenate can be removed to provide a treated solution complying with environmental regulations. The method provides a simple and effective technique for removing arsenic from arsenic-containing materials.
REFERENCES:
patent: 954263 (1910-04-01), Dewey
patent: 1198095 (1916-09-01), Anderson, Jr.
patent: 2596580 (1952-05-01), McKay et al.
patent: 3172755 (1965-03-01), Vian-Ortuno et al.
patent: 4025430 (1977-05-01), Pagel
patent: 4241039 (1980-12-01), Koh et al.
patent: 4244734 (1981-01-01), Reynolds et al.
patent: 4566975 (1986-01-01), Allgulin
patent: 4622149 (1986-11-01), Devuyst et al.
patent: 4724084 (1988-02-01), Pahmeier et al.
patent: 4731114 (1988-03-01), Ramadorai et al.
patent: 5093007 (1992-03-01), Domville
patent: 5123956 (1992-06-01), Fernandez et al.
patent: 5137640 (1992-08-01), Poncha
G. Ramadorai and R.K. Mishra, "Roasting of Arsenical Gold And Silver Bearing Minerals", Metallurgical Department, Newmont Gold Company, Carlin, Nevada, Refinery Department, Pease and Curren Company, Warwick, Rhode Island, no date.
R.G. Robins and J.C.Y. Huang, "The Adsorption Of Arsenate Ion By Ferric Hydroxide", Department of Mineral Processing and Extractive Metallurgy, School of Mines, University of New South Wales, Kensington, N.S.W. 2033 Australia, no date.
E. Krause and V.A. Ettel, "Solubilities And Stabilities of Ferric Arsenates", J. Roy Gordon Research Laboratory, INCO Limited, Mississauga, Ontario, Canada, Oct. 1987.
R.G. Robins, "The Aqueous Chemistry Of Arsenic In Relation To Hydrometallurgical Procsses", The University of New South Wales, Kensington, N.S.W., Australia, Aug., 1985.
F.J. Arriagada and K. Osseo-Asare, "Gold Extraction From Refractory Ores: Roasting Behavior Of Pyrite And Arsenopyrite", Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, no date.
Mahesh C. Jha and Marcy J. Kramer, "Recovery Of Gold From Arsenical Ores", AMAX Extractive Research & Development, Inc., 5950 McIntyre Street, Golden, CO 80403, no date.
Piret, Norbert L. and Melin, "An Engineering Approach To The Arsenic Problem In The Extraction Of Non-Ferrous Metals", Stolbert Ingenieurberatung GmbH, Consulting Engineers, D-5190 Stolberg/Rhld, no date.
A.S. Block-Bolton et al., "Separation Of Arsenic From Nickel", Materials Processing Center, Massachusetts Institute of Technology, Cambridge, MA 02139, no date.
M. Stefanakis and A. Kontopoulas, "Production Of Environmentally Acceptable Arsenites-Arsenates From Solid Arsenic Trioxide", METBA S.A., 1 Eratosthenous Street, GR 166 35 Athens, Greece, no date.
Taylor, "Cyclone Roasting Of Refractory Sulfide, Precious Metal Concentrates", University of Idaho, no date.
Downey Jerome P.
Mudgett Harry
Bos Steven
Hazen Research Inc.
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