发明名称 |
MAGNESIUM RECYCLING AND SULPHUR RECOVERY IN LEACHING OF LATERITIC NICKEL ORES |
摘要 |
<p>The present invention resides in a process of recovering nickel and cobalt, regenerating the main raw materials, said process including the steps of: granulometric separation; leaching; neutralization; MHP production in only one stage and the pressure crystallization of magnesium sulphite. The process proposes a way to recovery nickel and cobalt from laterite ores through the atmospheric and heap leaching with staged addition of ore - by size separation - and H2SO4, decreasing the nickel losses and simplifying the neutralization circuit and producing a more purified MHP. The present process route is employed for nickel extraction, including the one from high magnesium containing lateritic ores.</p> |
申请公布号 |
CA2752254(A1) |
申请公布日期 |
2009.12.10 |
申请号 |
CA20092752254 |
申请日期 |
2009.06.02 |
申请人 |
VALE S.A. |
发明人 |
PEREIRA, ANTONIO CLARETI;GUIMARAES, FELIPE HILARIO;TUDE, JOAO ALBERTO DE LESSA;FREITAS, LINO RODRIGUES DE;BERNI, TIAGO VALENTIN |
分类号 |
C22B3/06;C22B3/20;C22B23/06 |
主分类号 |
C22B3/06 |
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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