发明名称 |
Reduction of iron oxide-containing materials with solid carbonaceous reducing agents |
摘要 |
<p>Materials containing iron oxide are reduced in a first expanded fluidised bed using solid carbon-containing reducing agents (reductants) under weakly reducing conditions at most to the FeO state. The gas/solid suspension discharged is treated in a second expanded fluidised bed with strongly reducing fluidising gas, with the material being partially reduced to metallic iron. The carbonised carbon-containing material is separated from the gas/solid suspension discharged and is recirculated to the first fluidised bed. A part of the strongly reducing gas is, after purification and removal of CO2, recirculated to the second fluidised bed as fluidising gas. A reduced material having a degree of metallisation of from 50 to 80% together with the remaining part of the carbonised carbon-containing material is discharged from the lower part of the second fluidised bed and is completely reduced and melted in a fusion reactor. The gas evolved from the melt is partially further burnt directly above the melt by blowing-on of oxygen-containing gases and the heat thus generated is largely transferred to the melt. A complete further combustion of the gas is carried out in a subsequent second further combustion (afterburning) process. The material discharged from the lower part of the second fluidised bed can be further reduced in a third fluidised bed to a degree of metallisation of up to 95%. <IMAGE></p> |
申请公布号 |
AU670663(B2) |
申请公布日期 |
1996.07.25 |
申请号 |
AU19940057654 |
申请日期 |
1994.03.08 |
申请人 |
METALLGESELLSCHAFT AKTIENGESELLSCHAFT |
发明人 |
WOLFGANG BRESSER;MARTIN HIRSCH;BERND KOSTERS;FRITZ ROSE |
分类号 |
C21B11/00;C21B13/00;C21B13/14;(IPC1-7):C21B13/14 |
主分类号 |
C21B11/00 |
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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