Title:
製鉄用ヘマタイトの製造方法
Document Type and Number:
Japanese Patent JP5454815
Kind Code:
B2
Abstract:
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.
Inventors:
Hideki Sasaki
Yasumasa Suga
Yoshichi Ozaki
Manabu Enomoto
Hiroshi Shoji
Tatsuya Higaki
Hiroyuki Mitsui
Yasumasa Suga
Yoshichi Ozaki
Manabu Enomoto
Hiroshi Shoji
Tatsuya Higaki
Hiroyuki Mitsui
Application Number:
JP2012062793A
Publication Date:
March 26, 2014
Filing Date:
March 19, 2012
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
C22B3/44; C22B1/00; C22B1/02; C22B3/04; C22B15/00; C22B23/00
Domestic Patent References:
| JP2010095788A | ||||
| JP6279881A | ||||
| JP2011195920A | ||||
| JP2007098187A | ||||
| JP2011051850A | ||||
| JP2010126778A | ||||
| JP2008081766A | ||||
| JP2007070708A |
Attorney, Agent or Firm:
Yoshitaka Oshida
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