发明名称 |
WET PROCESS FOR SMELTING NICKEL OXIDE ORE |
摘要 |
<p>A process for smelting that can attain a high leaching ratio of nickel and cobalt and a high oxidation ratio of iron to trivalent iron, and, at the same time, can reduce energy cost by suppressing the amount of high-pressure air to be used as an oxidant and the amount of high-pressure steam to be used for maintaining temperature. In a smelting method comprising a first step for slurrying nickel oxide ore and a second step for adding sulfuric acid to the ore slurry and leaching the ore slurry while blowing high-pressure air and high-pressure steam therein, characterized by adjusting the carbon grade in a solid content of ore slurry so as to be 0.1 to 0.5% by mass depending on the blending ratio of the nickel oxide ore that constitutes the ore slurry in the first step and controlling oxidation-reduction potential (Ag/AgCl basis) of the leachate to 400 to 600 mV by adjusting the amount of the high-pressure air to be blown so as to be 700 to 800 Nm3 per ton of carbon in a solid content of ore slurry in the second step.</p> |
申请公布号 |
CA2650372(A1) |
申请公布日期 |
2009.08.25 |
申请号 |
CA20092650372 |
申请日期 |
2009.01.21 |
申请人 |
SUMITOMO METAL MINING CO., LTD |
发明人 |
SHIBAYAMA, KEISUKE;NAKAI, OSAMU;OZAKI, YOSHITOMO |
分类号 |
C22B23/06;C22B1/00;C22B3/06 |
主分类号 |
C22B23/06 |
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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