发明名称 |
PROCESS FOR THE DIRECT REDUCTION IN A ROTARY FURNACE OF MATTER THAT CONTAINS IRON OXIDE |
摘要 |
<p>Before iron oxide-containing materials is reduced in a rotary kiln by a treatment with solid carbonaceous reducing agents below the melting point of the charge, the iron oxide containing material and carbonaceous reducing agent are preheated in a multiple-hearth furnace, in which the reducing agent is subjected to an at least partial coking or an at least partial low-temperature carbonization. To prevent a partial reduction and sintering, the iron oxide-containing material is preheated in the upper part of the multiple-hearth furnace and the solid carbonaceous reducing agent is separately preheated in the lower part of the multiple-hearth furnace. At least part of the gases produced by the low-temperature carbonization in the lower part of the multiple-furnace is caused to flow in the upper part of said furnace in a countercurrent to the iron oxide-containing material to supply the heat required in said upper part.</p> |
申请公布号 |
EP0033021(B1) |
申请公布日期 |
1983.10.19 |
申请号 |
EP19800201078 |
申请日期 |
1980.11.13 |
申请人 |
METALLGESELLSCHAFT AG |
发明人 |
ELSENHEIMER, GERD;SCHNABEL, WOLFGANG, DR. DIPL.-ING. |
分类号 |
C21B13/08;(IPC1-7):21B13/08 |
主分类号 |
C21B13/08 |
代理机构 |
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代理人 |
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地址 |
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