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日本在含铁粉尘的综合利用方面发展很快。鉴于炼铁、炼钢系统除尘器回收的含铁粉尘中含锌,若掺入烧结矿中回收利用,将引发高炉故障,以往多作为废物填埋处理,如新日铁君津厂年填埋量达30万t,约占钢产量的3%。在节约资源和环保政策的推动下,新日铁于2000年引进美国转底炉技术,在君津厂建成18万t/a脱锌系统。即将含铁粉尘掺入一定量的煤粉和石灰等黏结剂压制成球团后,加入转底炉,在1200℃以上加热脱锌的同时球团被还原成
Japan is developing rapidly in the comprehensive utilization of iron-bearing dust. In view of iron-making, iron-containing dust recovered by the steel-making system dust containing zinc, if incorporated into sinter for recycling, will lead to blast furnace failure, the past as a waste landfill treatment, such as Nippon Steel Junjin plant annual landfill Up to 300,000 t, accounting for about 3% of steel production. Driven by resource conservation and environmental protection policies, Nippon Steel introduced the rotary hearth furnace technology from the United States in 2000 and built a 180,000 t / a dezincification system at Junjin Factory. Iron dust is about to incorporate a certain amount of pulverized coal and lime binder pressed into pellets, joined the hearth furnace, dezincification at 1200 ° C above the heat while the pellets are reduced to