Cu-converter slag
Fe: 38.32%
Cu: 4.03%
Co: 0.49%
Ni: 1.97%
Extractant: H
2
SO
4
(0.2 – 0.35 N)
Oxygen pressure: 0.45 - 0.59 MPa
FS: 52 - 270 µm
L/S: 2.5 – 20 (40 – 5% of solid)
T: 130°C
LT: 1 – 4 h
AS: 840 rpm
Maximum metals dissolution achieved at 4 h of experimental time
Increasing of pulp density (especially from 10 to 40%) led to decreased metal
extraction
Higher acid concentration improved metals leaching
Lower particle size favors metal extraction
Increased oxygen pressure improved metals extraction
Conditions of: SL: 10%, 0.35 N acid concentration, T: 130°C, O
2
pressure 0.59
MPa, LT: 4 h, stirring: 840 rpm were found to give optimum leaching of: Cu
92% (37.1 g/kg) #, Ni >95% (> 18.7 g/kg), Co >95% (> 4.7 g/kg)
Anand et al.
(1983)
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