发明名称 |
BEHANDLING AV KOPPARSULFIDRESTER INNEHAOLLANDE NICKEL OCH ARSEN |
摘要 |
<p>A process is disclosed for separating and recovering nickel and copper values from a nickel-copper matte which may contain iron and arsenic. Finely divided nickel-copper matte is leached in aqueous sulphuric acid solution under oxidizing conditions at atmospheric pressure and at a minimum temperature of about 80 DEG C. to selectively leach nickel from the matte to produce a nickel sulphate solution having a final pH in the range of about 4.0 to 6.5, preferably about 6.5, and to produce a copper-rich sulphide residue. The copper-rich sulphide residue is separated from the nickel sulphate solution and leached in a closed reaction vessel at a minimum temperature of about 120 DEG C. under a non-oxidizing atmosphere in a sulphuric acid solution containing an effective amount of copper and sulphuric acid to provide a terminal concentration of at least about 2 g/L Cu2+ and at least about 20 g/L sulphuric acid to produce a nickel sulphate solution containing any iron and arsenic and to produce a low nickel copper sulphide product essentially free of iron and arsenic.</p> |
申请公布号 |
FI931114(A0) |
申请公布日期 |
1993.03.12 |
申请号 |
FI19930001114 |
申请日期 |
1993.03.12 |
申请人 |
SHERRITT GORDON LIMITED |
发明人 |
KERFOOT, DEREK E. G.;RAUDSEPP, REIN |
分类号 |
C22B3/08;C22B3/44;C22B15/00 |
主分类号 |
C22B3/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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