Cu-converter slag
Fe: 44.17%
Cu: 3.25%
Zn: 1.56%
Co: 0.05%
Extractant: H
2
SO
4
(0.05 – 0.20 M) - Fe
2
(SO
4
)
3
(0 – 0.15 M)
FS: <125 µm
L/S: 25
T: 25 – 65°C
LT: 0.67- 3 h (40 – 180 min)
AS: 650 rpm
Ultrasound
Evaluated parameters: temperature, H
2
SO
4
concentration, Fe
2
(SO
4
)
3
×H
2
O
concentration, time, effect of ultrasound (presence/absence)
Application of ultrasound generally improves the levels of metals extraction
Fe
2
(SO
4
)
3
improves Cu extraction, having adverse effect on other metals (Zn,
Co, Fe)
Optimal conditions: 65°C, 0.2 M H
2
SO
4
, 0.15 M Fe
2
(SO
4
)
3
, LT: 3 h (without
application ultrasound: Cu 80.41% (26.1 g/kg), Zn 48.28% (7.5 g/kg), Co
64.52% (0.3 g/kg), Fe 12.16% (53.7 g/kg); with application ultrasound: Cu
89.28% (29 g/kg) #, Zn 51.32% (8 g/kg), Co 69.87% (0.3 g/kg), Fe 13.73%
(59.1 g/kg))
Beşe (2007)
125>
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