公开(公告)号：US5162107A

公开(公告)日：1992-11-10

申请号：US630484

申请日：1990-12-20

申请人： Martin Hirsch ,  Albert Kaune ,  Alpaydin Saatci ,  Karlheinz Broj ,  Uwe Harter ,  Walter Meichsner

发明人： Martin Hirsch ,  Albert Kaune ,  Alpaydin Saatci ,  Karlheinz Broj ,  Uwe Harter ,  Walter Meichsner

IPC分类号： C22B7/00 ,  C22B7/02 ,  C22B13/02 ,  C22B19/04 ,  C22B19/30

CPC分类号： C22B7/02 ,  C22B7/004 ,  Y02P10/212 ,  Y10S423/16

摘要： A zinc- and lead-containing residue from a metallurgical plant is reprocessed by a thermal treatment in a circulating fluidized bed system. A major part of the heat demand is satisfied by a combustion of solid carbonaceous material in the fluidized bed reactor of the circulating fluidized bed system. A reducing fluidizing gas, which is virtually free of free oxygen, is fed to the lower part of the fluidized bed reactor. A solid carbon content of from 5 to 30% is adjusted in the fluidized bed in the lower portion of the fluidized bed reactor, which is supplied in its upper portion with oxygen-containing gases and in which CO.sub.2 is formed only at such a rate that zinc metal is not reoxidized. Substantially all solids are removed in a recycling cyclone from the suspension discharged from the reactor and the removed solids are recycled. The gas is cooled to a temperature at which zinc metal is oxidized to ZnO. The dust-like zinc compounds and lead compounds are removed from the gas.

摘要翻译： 来自冶金厂的含锌和铅的残余物通过在循环流化床系统中的热处理来再加工。 通过在循环流化床系统的流化床反应器中固体碳质材料的燃烧来满足热需求的主要部分。 将实质上不含游离氧的还原流化气体进料到流化床反应器的下部。 在流化床反应器的下部的流化床中调节固体碳含量为5至30％，流化床的上部部分含有含氧气体，其中仅形成二氧化碳的速率为 锌金属不再氧化。 基本上所有的固体在循环旋风分离器中从从反应器排出的悬浮液中除去，并且将去除的固体再循环。 将气体冷却至锌金属氧化成ZnO的温度。 从气体中除去尘埃状的锌化合物和铅化合物。