发明申请
- 专利标题: METHOD FOR PRODUCING HEMATITE FOR IRONMAKING
- 专利标题(中): 用于生产氧化镍的方法
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申请号: US14386172申请日: 2013-01-16
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公开(公告)号: US20150023851A1公开(公告)日: 2015-01-22
- 发明人: Hideki Sasaki , Yoshitomo Ozaki , Manabu Enomoto , Hirofumi Shouji , Tatsuya Higaki , Hiroyuki Mitsui , Yasumasa Kan
- 申请人: Sumitomo Metal Mining Co., Ltd.
- 优先权: JP2012-062793 20120319
- 国际申请: PCT/JP2013/050669 WO 20130116
- 主分类号: C01G49/06
- IPC分类号: C01G49/06
摘要:
Provided is a method for producing hematite for ironmaking, wherein high purity hematite, which can be used as an iron-making raw material, is cheaply and efficiently recovered from a leach residue containing iron oxide produced by a high pressure acid leach (HPAL) process. This method for producing (high purity) hematite for ironmaking in a process of adding a mineral acid and an oxidant to ore containing iron and valuable metals and then leaching the valuable metals under high pressure and high temperature includes (1) a neutralization step of adding a neutralizer to a leachate obtained under high pressure and high temperature to form a leach slurry, (2) a solid-liquid separation step of separating the leach slurry obtained in the neutralization step (1) into a leach residue and the leachate, and (3) a classification step of classifying the leach residue into the hematite and gangue components. (145 words)
公开/授权文献
- US09255013B2 Method for producing hematite for ironmaking 公开/授权日:2016-02-09
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