Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1975-05-30
1976-05-25
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204112, 210 50, 75 74, 75101R, 75117, 75119, 423508, 423509, 75121, C25C 112
Patent
active
039590976
ABSTRACT:
A method is provided for removing trace amounts of selenium from acid leach solutions containing over 2 ppm of total selenium comprising either Se(IV) and/or Se(VI) obtained during the pressure oxidation leaching of metal sulfide concentrate comprising forming a slurry of said acid solution with comminuted metal sulfide concentrate, said slurry containing at least two grams of a metal ion as metal hydroxide per liter of solution and then subjecting said slurry to agitation at a temperature of at least about 185.degree.C at a pressure of a least about 160 psig, whereby to reduce the total selenium content of said solution to less than about 2 ppm.
REFERENCES:
"Nickel Refining in Finland," Canada Mining & Metallurgical Bull., June 1964, pp. 653-658.
"Atmospheric Leaching of Matte at the Port Nickel Refinery," Z. R. Llanos, C.M.M.B., Feb. 1974, pp. 74-81.
Chou Eddie C.
Queneau Paul B.
Symens Raymond D.
Amax Inc.
Andrews R. L.
Kalil Eugene J.
Serijan Kasper T.
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