Invention Grant
- Patent Title: Method for producing pig iron
- Patent Title (中): 生铁生产方法
-
Application No.: US12988862Application Date: 2009-05-27
-
Publication No.: US08298316B2Publication Date: 2012-10-30
- Inventor: Natsuo Ishiwata , Hiroyuki Hiroha , Koichi Nushiro , Atsushi Sakai
- Applicant: Natsuo Ishiwata , Hiroyuki Hiroha , Koichi Nushiro , Atsushi Sakai
- Applicant Address: JP
- Assignee: JFE Steel Corporation
- Current Assignee: JFE Steel Corporation
- Current Assignee Address: JP
- Agency: DLA Piper LLP (US)
- Priority: JP2008-141981 20080530
- International Application: PCT/JP2009/060101 WO 20090527
- International Announcement: WO2009/145348 WO 20091203
- Main IPC: C21B5/06
- IPC: C21B5/06 ; C22B7/02 ; C22B19/04

Abstract:
In a method for producing pig iron using iron ore with a high content of zinc, a blast furnace raw material 2 is produced using iron ore with a high content of zinc which contains 0.01 mass % or more of zinc and 50 mass % or more of iron, pig iron is produced by charging the blast furnace raw material 2 into a blast furnace 1 and, at the same time, zinc-containing dust 4 in a blast furnace discharge gas is recovered, and zinc 6 is recovered from the zinc-containing dust 4 using a reduction furnace 5. A mixed raw material into which the zinc-containing dust 4, a carbonaceous solid reducing material and a slag-making material are mixed is preferably charged on a movable hearth, and the mixed raw material is preferably reduced by supplying heat from an upper portion of the movable hearth so as to recover zinc 6 while producing reduced iron 7.
Public/Granted literature
- US20110041652A1 METHOD FOR PRODUCING PIG IRON Public/Granted day:2011-02-24
Information query