Preparation of High-Carbon Metallic Briquette for Coke Saving in Blast Furnace
Developments in blast furnace (BF) sector have long focused on coke saving in ironmaking. In this research, high-carbon metallic briquette was proposed as a novel BF feeding material for coke saving in BF. The preparing condition of the proposed high-carbon metallic briquette was optimized regarding its carbon content, cold strength and crushing strength after the reaction. Gasification behaviour of the optimally prepared briquette was examined using a custom-built thermalgravimetric analysis device. Results showed that the optimal preparation condition was mhematite/mcoal = 2.0. The activation energy of carbon gasification in the briquette was 166 kJ/mol; analysis of the effective application of the briquette indicated that a suitable addition level of high-carbon metallic briquette in the ore layer in BF could suppress the lump coke gasification.
KeywordsHigh-carbon metallic briquette Blast furnace Gasification Coke saving