Invention Grant
- Patent Title: Method for reducing chromium containing raw material
- Patent Title (中): 减少含铬原料的方法
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Application No.: US12543798Application Date: 2009-08-19
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Publication No.: US08262766B2Publication Date: 2012-09-11
- Inventor: Hiroshi Sugitatsu , Hidetoshi Tanaka , Takao Harada , Itsuo Miyahara , Isao Kobayashi
- Applicant: Hiroshi Sugitatsu , Hidetoshi Tanaka , Takao Harada , Itsuo Miyahara , Isao Kobayashi
- Applicant Address: JP Kobe-shi
- Assignee: Kobe Steel, Ltd.
- Current Assignee: Kobe Steel, Ltd.
- Current Assignee Address: JP Kobe-shi
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2003-001200 20030107
- Main IPC: C21B11/00
- IPC: C21B11/00

Abstract:
An object of the present invention is to provide a method for reducing a chromium-containing material at a high chromium reduction degree. In the method of the present invention, a mixture of a feedstock containing chromium oxide and a carbonaceous reductant is heated and reduced by radiation heating in a moving hearth furnace. The average rate of raising the temperature of the mixture in the reduction is preferably 13.96° C./s or higher in the period from the initiation of the radiation heating of the mixture until the mixture reaches 1,114° C.
Public/Granted literature
- US20100037728A1 METHOD FOR REDUCING CHROMIUM CONTAINING RAW MATERIAL Public/Granted day:2010-02-18
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