发明名称 |
Method for working up zinc- and lead-bearing steel plant residues |
摘要 |
<p>The working-up of zinc- and lead-bearing metallurgical plant residues is carried out by thermal treatment in a circulating fluidised bed, the heat requirement being met by combustion of solid carbon in the fluidised-bed reactor of the circulating fluidised bed. The solid carbon content in the lower part of the fluidised bed is adjusted to 5 to 30%. Oxygen-containing gases are introduced into the upper part of the fluidised-bed reactor, and the formation of CO2 is taken only so far that metallic zinc is not reoxidised. The discharged suspension is largely freed of solids in a return cyclone, and the solids are recycled. The gas is cooled to a temperature at which the metallic zinc is oxidised to ZnO, and the zinc and lead compounds in the form of dust are precipitated from the gas. <IMAGE></p> |
申请公布号 |
EP0626457(B1) |
申请公布日期 |
1998.08.26 |
申请号 |
EP19940201131 |
申请日期 |
1994.04.25 |
申请人 |
METALLGESELLSCHAFT AKTIENGESELLSCHAFT |
发明人 |
BRESSER, WOLFGANG;HIRSCH, MARTIN, DR.;KAUNE, ALBERT, DR.;HAERTER, UWE |
分类号 |
C22B7/04;C22B7/02;C22B13/02;C22B19/28;(IPC1-7):C22B7/02 |
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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