Invention Grant
- Patent Title: Process for producing reduced metal and agglomerate with carbonaceous material incorporated therein
- Patent Title (中): 用其中掺入碳质材料制备还原金属和附聚物的方法
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Application No.: US10548519Application Date: 2004-03-09
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Publication No.: US07674314B2Publication Date: 2010-03-09
- Inventor: Takao Harada , Hidetoshi Tanaka
- Applicant: Takao Harada , Hidetoshi Tanaka
- 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: JP2003-063516 20030310
- International Application: PCT/JP2004/001337 WO 20040309
- International Announcement: WO2004/081238 WO 20040923
- Main IPC: C22B1/16
- IPC: C22B1/16 ; C21B13/08

Abstract:
Agglomerates with a carbonaceous material incorporated therein and a process for producing reduced metal using the agglomerates are provided. The agglomerates are prepared with high-VM coal, which is widely and abundantly produced and is less expensive, and they provide high strength after reduction without the need for finer metal oxide particles. The agglomerates are made of a carbonaceous material and a raw material to be reduced that contains a metal oxide, such as iron ore. The carbonaceous material used is a high-VM coal containing 35% or more by mass of volatile matter. The agglomerates are formed at a pressure of at least 2 t/cm2 so that the porosity thereof is reduced to 35% or less. The reduction in porosity is effective in promoting heat transfer inside the agglomerates in a rotary hearth furnace in a high-temperature reduction step so that the sintering of reduced metal proceeds efficiently in the overall regions of the agglomerates to produce a reduced metal having high crushing strength.
Public/Granted literature
- US20060278040A1 Process for producing reduced matal and agglomerate with carbonaceous material incorporated therein Public/Granted day:2006-12-14
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