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开发一种高炉粉尘再资源化处理工艺,采用“非熔态还原--磁选分离--Zn的回收、富集”方法对典型高炉粉尘进行Fe、Zn非熔态分离研究.结果表明:在910～1 010℃,使用纯H2、CO为还原剂进行非熔态还原,同时实现粉尘中Fe2O3(s)→Fe(s)和ZnO(s)→Zn(g)的高度转变,金属化率达到90%以上,气化脱锌率达到99%以上,且还原过程未发生烧结.还原产物直接经磁选分离、富集得到TFe品位>90%的富Fe物料;含锌挥发物经回收、富集得到ZnO含量>92%的富Zn物料.成功地将高炉粉尘全部转化为MFe、ZnO等有价资源,实现了零排放,且分离过程不需高温熔融,过程能耗低,无环境污染.
Development of a blast furnace dust re-resource treatment process, using “non-molten state reduction - magnetic separation - Zn recovery, enrichment” method for typical blast furnace dust Fe, Zn non-molten state separation results show : In the range of 910-1 010 ℃, pure H2 and CO are used as reductants for non-molten state reduction, and at the same time, the height transformation of Fe2O3 (s) → Fe (s) and ZnO (s) → Zn (g) The rate of gasification reaches more than 90%, the rate of gasification dehumidification reaches above 99%, and the sintering process does not occur in the reduction process. The reduced product is directly separated by magnetic separation to obtain Fe-rich material with TFe grade> 90% Recovering and enriching the Zn-rich material with the ZnO content> 92%, successfully converting all the blast furnace dust into valuable resources such as MFe and ZnO, achieving zero discharge, and the separation process does not require high-temperature melting and the process has low energy consumption and no energy consumption Environmental pollution.