发明名称 |
Direct smelting process and apparatus |
摘要 |
A molten bath-based direct smelting process for producing ferrous metal from a ferrous feed material is disclosed. The process is characterised by injecting pro-heated air downwardly into metallurgical vessel at an angle of 20 to 90° C. relative to a horizontal axis and at a temperature of 800-1400 ° C. and at a velocity of 200-600 m/s via at least one lance ( 27 ) . This step forces molten material in the region of a lower end of the lance away from the lance and forming a "free"space around the lower end of the lance that has a concentration of molten material that is lower than the molten material concentration in the raised bath. The process is further characterised in that the lance is located so that: (i) the lance extends into the vessel a distance that is at least the outer diameter of he lover end of the lance; and (ii) the lower end of the lance is at least 3 times the outer diameter of the lower end of the lance above a quiescent surface of the molt bath.
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申请公布号 |
US6939391(B2) |
申请公布日期 |
2005.09.06 |
申请号 |
US20030220049 |
申请日期 |
2003.01.27 |
申请人 |
TECHNOLOGICAL RESOURCES PTY LTD |
发明人 |
DRY RODNEY J.;BURKE PETER |
分类号 |
C21B11/08;C21B11/00;C21B13/00;C21B13/10;(IPC1-7):C21B11/00 |
主分类号 |
C21B11/08 |
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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