This paper discusses the PRIMUS~(~R) process for the treatment of various zinc and iron bearing residues. Using coal as the reductant and energy source, Paul Wurth has developed this multiple-hearth furnace technology for the separation of zinc from the treated material. Using a two stage process, a 95 % pure crude zinc oxide is produced. Furthermore, the reduction furnace produces a highly metallized iron concentrate that can be melted and cast into pig iron using an electric arc furnace.
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机译：本文讨论了PRIMUS〜（〜R）工艺处理各种含锌和铁的残留物的方法。 Paul Wurth使用煤作为还原剂和能源，开发了这种多炉膛炉技术，用于从处理后的物料中分离锌。使用两步法，可以生产95％的粗氧化锌。此外，还原炉还生产出高度金属化的铁精矿，可以使用电弧炉将其熔融并铸成生铁。
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