发明名称 |
Process for producing reduced metal and agglomerate with carbonaceous material incorporated therein |
摘要 |
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.
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申请公布号 |
US7674314(B2) |
申请公布日期 |
2010.03.09 |
申请号 |
US20050548519 |
申请日期 |
2005.09.09 |
申请人 |
KOBE STEEL, LTD. |
发明人 |
HARADA TAKAO;TANAKA HIDETOSHI |
分类号 |
C22B1/16;C21B5/00;C21B7/10;C21B13/08;C21B13/10;C22B1/216;C22B1/245;C22B5/10;C22B23/02;C22B34/12;C22B34/32;C22B47/00 |
主分类号 |
C22B1/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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