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The RecoDust Process—Upscale of a Pilot Plant
Steel Research International ( IF 1.9 ) Pub Date : 2020-07-20 , DOI: 10.1002/srin.202000191
Wolfgang Reiter 1 , Johannes Rieger 1 , Marlene Lasser 1 , Harald Raupenstrauch 1 , Tamara Tappeiner 1
Affiliation  

The RecoDust process is a pyrometallurgical approach for the treatment of heavy metal–containing basic oxygen furnace dusts (BOFD) and delivers two products without any residues: the iron rich RecoDust slag and a zinc rich filter dust, called crude zinc oxide (CZO). The state of the art Waelz process has some disadvantages and is only suitable for dusts with zinc contents >15%. Within the frame of a project of the Austrian competence center program K1‐MET and with financial support of voestalpine Stahl, a RecoDust pilot plant is operated at the Chair of Thermal Processing technology at the Montanuniversitaet Leoben and has shown good dezincification rates of BOFD in eleven smelting campaigns with a throughput up to 300 kg h−1. The target is the design of an industrial plant with a throughput capacity of 1000 kg h−1 in the next years. For the upscale, a new pneumatic conveying system was installed at the pilot plant, which uses natural gas as conveying medium. The commissioning of the developed pilot plant was successful and revealed a good product quality of the CZO. An enhanced dezincification of the RecoDust slag is one open challenge, therefore the dust feed conveying must be more precise.

中文翻译:

RecoDust工艺—中试工厂的高档化

RecoDust工艺是一种火法冶金方法,用于处理含重金属的碱性氧气炉粉尘(BOFD),并提供两种没有任何残留物的产品:富含铁的RecoDust炉渣和富含锌的滤尘,称为粗氧化锌(CZO)。最新的Waelz工艺存在一些缺点,仅适用于锌含量> 15%的粉尘。在奥地利能力中心计划K1-MET的项目框架内,并在奥钢联Stahl的财政支持下,RecoDust中试工厂在Leanben的Montanuniversitaet Leoben的热加工技术部门运作,并且在11个月中显示出良好的BOFD脱锌率产量高达300 kg h -1的冶炼活动。目标是在未来几年内设计生产能力为1000 kg h -1的工厂。对于高档产品,在中试工厂安装了新的气动输送系统,该系统使用天然气作为输送介质。已开发的中试工厂的调试成功,并显示了CZO的良好产品质量。RecoDust渣的脱锌能力增强是一个开放的挑战,因此粉尘给料的输送必须更加精确。
更新日期:2020-07-20
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