|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||8th International Symposium on High Temperature Metallurgical Processing
||Effects of Hydrogen-enriched Reduction on Metallurgical Properties of Iron-bearing Burdens under BF Operation with Cog Injection
||Hongtao Wang, Mansheng Chu, Chuanguang Bi, Zhenggen Liu
|On-Site Speaker (Planned)
COG injection is considered as one of effective measures to reduce carbon emission of BF. The BF operation with COG injection was simulated by means of multi-fluid BF mode，which revealed that with increasing COG injection rate, in-furnace H2 concentration is increased and reduction of magnetite and wustite by H2 is obviously accelerated. Under this hydrogen-enriched condition, metallurgical properties of iron-bearing burdens were experimentally investigated. The GB/T13242-91 test results showed that with 152.34 m3/tHM COG injection, the reduction swelling index of pellets is decreased from 10.71% to 9.54% while reduction ratio is increased from 31.57% to 36.39%. Softening interval of mixed burdens is increased from 163.6℃ to 228.3℃ while melting interval is decreased from 147.3 ℃ to 92.4 ℃. The cohesive zone moves downwards and becomes narrower. The permeability of mixed burdens is improved. In terms of metallurgical properties of iron-bearing burdens, COG injection benefits to improve BF performance.
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