发明名称 |
IRON MANUFACTURING-USE HEMATITE PRODUCTION METHOD |
摘要 |
Proposed are a process for separating a leach residue from which a hematite-containing material capable of being used as a raw material for ironmaking can be obtained and a process for producing hematite for ironmaking from the leach residue. The process utilizes, as a raw material, a leach residue that is obtained from a hydrometallurgical refining plant where a nickel oxide ore is treated by a high pressure acid leach process, and includes at least the following three steps in sequence: a separation step of the leach residue into an overflow and an underflow using a wet cyclone under a condition that the wet cyclone is adjusted to have a setting between 1 µm or less and 2 µm or less as a classification particle size for the overflow; a physical separation step of the overflow into a strong magnetic substance and a weak magnetic substance using a strong-magnetic-field magnetic separator under a condition that magnetic field intensity is 5 to 20 [kGauss]; and a dehydration step of a superheated steam drying system of adjusting a moisture content of the strong magnetic substance after the separation, to be 10 wt% to 17 wt%. (193 words) |
申请公布号 |
EP3018222(A1) |
申请公布日期 |
2016.05.11 |
申请号 |
EP20140819962 |
申请日期 |
2014.06.03 |
申请人 |
SUMITOMO METAL MINING CO., LTD. |
发明人 |
OHARA GO;KAN YASUMASA;IMAMURA MASAKI |
分类号 |
C22B1/00;B01D21/26;B03B5/28;B03B7/00;B03C1/025;C01G49/06;C02F11/12;C21B5/00;C22B3/00;C22B23/00 |
主分类号 |
C22B1/00 |
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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