发明名称 |
Method of reprocessing metallurgical residues, which contain zinc and lead |
摘要 |
Residual metallurgical materials which contain zinc and lead are reprocessed by a thermal treatment in a circulating fluidized bed. The required heat is generated in that solid carbon is combusted in the fluidized bed reactor of the circulating fluidized bed. A solid carbon content of 5 to 30% is maintained in the lower part of the fluidized bed. Oxygen-containing gases are supplied to the upper part of the fluidized bed reactor, and CO2 is formed only in such an amount that zinc metal will not be reoxidized. Substantially all solids are removed from the discharged suspension in a recycle cyclone and are recycled. The gas is cooled to a temperature at which zinc metal is oxidized to ZnO. The dustlike compounds of zinc and lead are separated from the gas.
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申请公布号 |
US5474592(A) |
申请公布日期 |
1995.12.12 |
申请号 |
US19940250808 |
申请日期 |
1994.05.27 |
申请人 |
METALLGESELLSCHAFT AKTIENGESELLSCHAFT |
发明人 |
BRESSER, WOLFGANG;HIRSCH, MARTIN;KAUNE, ALBERT;HAERTER, UWE |
分类号 |
C22B7/04;C22B7/02;C22B13/02;C22B19/28;(IPC1-7):C22B7/00 |
主分类号 |
C22B7/04 |
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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