发明名称 |
Direct smelting process |
摘要 |
A process for direct smelting metalliferous feed material is disclosed. Iron oxides are partially reduced in a solid state in a pre-reduction vessel. The partially reduced iron oxides are smelted to molten iron in a direct smelting vessel which contains a molten bath of iron and slag and is supplied with a solid carbonaceous material as a source of reductant and energy and with an oxygen-containing gas for post-combusting carbon monoxide and hydrogen generated in the vessel. The direct smelting step generates an off-gas that contains sulphur and the off-gas is released from the direct smelting vessel. Part only of the off-gas released from the direct smelting vessel is used in the pre-reduction step to pre-reduce iron oxides in the pre-reduction vessel. Part only of the off-gas is used in the pre-reduction step in order to control the amount of sulphur that is returned with the partially reduced iron oxides to the direct smelting vessel.
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申请公布号 |
US6379422(B1) |
申请公布日期 |
2002.04.30 |
申请号 |
US20000632730 |
申请日期 |
2000.08.04 |
申请人 |
TECHNOLOGICAL RESOURCES PTY. LTD. |
发明人 |
DRY RODNEY JAMES |
分类号 |
C21B13/10;C21B11/00;C21B11/02;C21B13/00;C21B13/14;(IPC1-7):C21B11/00 |
主分类号 |
C21B13/10 |
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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