Invention Grant
- Patent Title: Partially-reduced iron producing method and partially-reduced iron producing apparatus
- Patent Title (中): 部分还原铁生产方法和部分还原铁生产设备
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Application No.: US13693581Application Date: 2012-12-04
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Publication No.: US08961650B2Publication Date: 2015-02-24
- Inventor: Susumu Kamikawa , Hiroshi Nakajima , Keiichi Sato , Khanhson Pham
- Applicant: Mitsubishi-Hitachi Metals Machinery, Inc.
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi-Hitachi Metals Machinery, Inc.
- Current Assignee: Mitsubishi-Hitachi Metals Machinery, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2011-265559 20111205
- Main IPC: C22B1/02
- IPC: C22B1/02 ; C21B11/10 ; F27D17/00 ; C21B13/00 ; C21B13/10 ; C21B13/14 ; F27B9/30 ; C21C5/52 ; F27B9/24
Abstract:
A reduction furnace includes a pellet material supplying device forming on a grate an ignition carbon material layer having a predetermined height; an ignition device; and an exhaust gas circulation device supplying an oxygen-containing gas comprising circulated exhaust gas mixed with air, to a packed bed of the pellets heated by a combustion heat of the ignition carbon material layer. A partially-reduced iron is produced by thermally reducing the pellets through a combustion region for the ignition carbon material layer and a heating region, the combustion region formed upstream in a travelling direction of the grate by supplying a gas having a high oxygen concentration, the heating region formed downstream of the combustion region by supplying a gas having a low oxygen concentration.
Public/Granted literature
- US20130139647A1 PARTIALLY-REDUCED IRON PRODUCING METHOD AND PARTIALLY-REDUCED IRON PRODUCING APPARATUS Public/Granted day:2013-06-06
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