高炉内锌的赋存形式及对烧结矿性能的影响

doi:10.13228/j.boyuan.issn0449-749x.20190566

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Abstract Zinc,as a harmful element,has brought a series of adverse effects on production by circulating and enriching in the blast furnace. However,the form of zinc occurring in a blast furnace is uncertain. Therefore,a new experimental method was designed to simulate the occurrence of zinc in the upper part of the blast furnace and its effect on the reduction and pulverization of sinter. The experimental results show that when the temperature is between 493 and 905 ℃,Zinc adheres to the sinter in the liquid form first,and then Zinc was oxidized to ZnO by gas. Finally,a compact shell is attached to the surface of the sinter. This phenomenon hinders the reduction of sinter. When the temperature is below 493 ℃,Zinc is mainly enriched with a mixture of metal Zinc and ZnO,which promotes the reduction of sinter. It promotes the reduction of sinter. When the temperature is less than 905 ℃,the Zinc enriched on the sinter can reduce the strength of the sinter,which promotes the pulverization of the sinter.

Key words： enrichment occurring state ZnO reduction and pulverization

Received: 30 December 2019

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190566 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I8/130

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