In order to develop a zinc recovery process from zinc-bearing dusts generated from ironmaking and steelmaking plants, fundamental A circulating fiuidized bed process has been investigated to treat dusts from steelworks.10) A zinc smelting process using zinc oxide or sulfide ores has been developed and commercialized in the non-ferrous metallurgical industry.11) However, it seems to be impossible to introduce this process into steelworks for treatment of zinc-bearing dust due to the low zinc concentration.The purpose of the present study is to develop a zinc condensation process from zinc-bearing dusts generated in steelworks, by use of sensible heat of hot metal. 2.Properties of Zinc-bearing Dusts Generated from lronmaking and Steelmaking Plants Zinc-bearing dusts are generated from ironmaking and steelmaking plants in steelworks. Figure I shows

Influence of pulverized coal into the blast furnace is an invaluable technology for reducing ironmaking costs. In order to increase the rate of pulverized coal injection, it is necessary to investigate the combustion behavior of pulverized coal around the tuyere, and many numerical simulations as well as experimental studies have examined this issue. In this paper, the combustion behavior of individual pulverized coal particles was investigated by using the Extended CPD model, which is a new devolatilization model, and the Large Eddy Simulation (LES) model. The volume fraction of CO + CO 2 , which is the indicator of how much carbon included in pulverized coal is changed to the gas phase, was reasonably predicted by the new simulation model. The results of this study suggested that the devolatilization processes of pulverized coals with sizes under 40 μm varies widely between individual particles.

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