A newoxygen blast furnace process, which is characterized by the injection of preheating gas into the The preheating gas composition has little influence on the reduction in the lower part.(4)The position of preheating gas injection is adequate in the upper shaft as long as the heat transfer is secured. Operational fuel rate range is wide; 500kg/t(with preheating gas)-1 200kg/t(without preheating gas).
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