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    • 2. 发明授权
    • Treating lead- and zinc-containing steelmaking byproducts
    • 处理含铅和含锌钢铁副产品
    • US4765829A
    • 1988-08-23
    • US905270
    • 1986-09-08
    • Franz BeckmannRomain SchmitArmand Wagner
    • Franz BeckmannRomain SchmitArmand Wagner
    • C22B1/245C22B7/02C22B7/04C22B13/02C22B19/04C22B19/30C22B19/34
    • C22B1/245C22B13/02C22B19/30C22B19/34C22B7/02Y02P10/212
    • According to the instant invention fine and very fine granular zinc- and lead-containing oxidic byproducts are mixed with thermally inert additives and are hot briquetted with caking coal as a binder at a temperature of 490.degree..+-.40.degree. C. using sufficient carbon to reduce all of the metallic components in the byproducts. Then this mixture is briquetted and heated to more than 700.degree. C. and is maintained at this high temperature for a predetermined time to reduce, that is deoxidize, most of the oxidic components of the briquets, especially zinc, lead, and iron oxides. When the byproducts are not dry, which is standard with a wet scrubbing system for cleaning stack gases, the resultant slurry must be dried before it can be treated according to this invention. The carbon according to the invention is added as fine-granular caking coal in portions of at least 20% by weight. Preferably the portion is between 25% and 35% and up to 40%.
    • 根据本发明,将精细且非常细的颗粒状含锌和铅的氧化副产物与热惰性添加剂混合,并在490℃至40℃的温度下用结块煤热压块,使用足够的碳 以减少副产物中的所有金属成分。 然后将该混合物压块并加热至700℃以上,并保持在该高温下预定时间以减少(即,脱氧)砖的大部分氧化组分,特别是锌,铅和氧化铁。 当副产物不干燥时,这是用于清洁堆积气体的湿式洗涤系统的标准配置,所得浆料必须在根据本发明进行处理之前进行干燥。 根据本发明的碳以至少20重量%的部分作为细颗粒结块煤加入。 优选地,该部分在25%至35%和至多40%之间。