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Blow injection of an Fe source and powdered carbon into a blast furnace takes place through a separate lane inserted in a blow pipe. The lance for injection of powdered carbon is 50-500 mm away at the upstream from that for injection of Fe source. When the volatile component of the powdered carbon is ≥30%, the reducing percentage of the powdered Fe source is controlled at ≥0. The volatile component...
This article examines the coke degradation mechanism which was considered to suppress the fine coke increase during high-rate pulverized coal injection. It describes how the fine coke increases at the tuyere level during high-rate pulverized coal injection because of degraded coke surface and the lack of gasification by oxygen and the increase of gasification by carbon dioxide in the raceway. The...
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