Title:
鉄スクラップからの銅の硫化除去方法
Document Type and Number:
Japanese Patent JP5724861
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for effectively separating and re-collecting tramp elements (e.g., Cu), which coexist in iron scrap and are difficult to be removed, from the iron scrap.SOLUTION: The separation and re-collection method includes: bringing the obtained melt of the iron scrap into contact with molten Ag; migrating the element coexisting in the iron scrap (e.g., Cu) to the molten Ag; bringing Cu, which is migrated to the molten Ag, into contact with sulfide flux (molten NaS) to obtain the sulfide (CuS); and removing it. The melt of the iron scrap is preferably saturated with carbon. Cu and Ag contained in the sulfide flux can be recovered as metals through oxidizing treatment, while sulfide flux and Ag can be re-circulated and reused.
Inventors:
Hideki Ono
Takakazu Yamamoto
Nakamoto Shoji
Katsuhiro Yamaguchi
Takakazu Yamamoto
Nakamoto Shoji
Katsuhiro Yamaguchi
Application Number:
JP2011269728A
Publication Date:
May 27, 2015
Filing Date:
December 09, 2011
Export Citation:
Assignee:
Nippon Steel & Sumitomo Metal Corporation
International Classes:
C22B7/00; C22B9/02; C22B9/10
Domestic Patent References:
| JP10110224A | ||||
| JP9263848A | ||||
| JP2003105448A | ||||
| JP2010133002A | ||||
| JP2011006749A |
Attorney, Agent or Firm:
Masaki Ichihara
Hideki
Shoichi Hirose
Hideki
Shoichi Hirose