| The computer simulation model was established to verify the applicability of smelting reduction concepts to converter slag which becomes an issue on the environmental and recycling aspects. The computer simulation model provides the following results. The utilization of latent energy of converter slag after tap is a very effective and reasonable method for saving energy. Also, the increase of post combustion ratio and heat transfer efficiency are effective ways in saving energy. But in order to increase PCR, recovery efficiency of post combustion energy has to be higher than 85% HTC to satisfy both refractory life and energy efficiency. Coke is a most useful fuel source because it shows low dependence to post combustion ratio and low hydrogen content. In the present process, the quality of hot metal would be expected to be at a similar level with that of the blast furnace. The utilization of scrap was also possible to maximize the advantages of the present process which were high temperature and chemical dilution with hot metal. In the case of scrap, energy consumption increases slightly due to preheating of scrap. Consequently, the concept of the present process provides one possibility of integrating recyclable waste materials such as converter slag, coke oven dust, life terminated acidic refractory, scrap by smelting reduction process. |
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