Influence of coke reactivity on technical-economic indicators of blast-furnace performance
In the blast-furnace smelting process, which is characteristically highly intensive, the coke is required to maintain the adequate permeability of the burden column. Tighter pig iron specifications and lower coke consumptions must be met by higher coke quality, with emphasis on uniformity and stability in all respects. The strength of coke depends on temperature, pressure and attach by basic oxides, which all lead to its disintegration. In this respect, the strength of coke is closely associated with its reactivity. Since coke combustion in the tuyere zone of the blast furnace takes place in the presence of not only free oxygen but also carbon dioxide and water vapor, the reactivity of the fuel substance is a crucial factor. It must not allow any significant regeneration of carbon dioxide and water vapor, since this would increase the coke consumption and lower the coefficient of heat utilization of the carbon in the throat. High reactivity weakens the coke structure and promotes the accumulation of fines in the lower burden levels, which is highly undesirable. Hence it is widely held that cokes with lower reactivities are better fuels for the blast-furnace process. 13 refs., 2 tabs.
- OSTI ID:
- 508384
- Journal Information:
- Coke and Chemistry USSR, Journal Name: Coke and Chemistry USSR Journal Issue: 9; ISSN COKCA8; ISSN 0010-0501
- Country of Publication:
- United States
- Language:
- English
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