Experimental and Numerical Investigations on Charging Carbon Composite Briquettes in a Blast Furnace

In the present research, charging carbon composite briquettes (CCB) in a blast furnace (BF) was investigated. The CCB used contained 29.70 wt.% Fe3O4, 39.70 wt.%, FeO, 1.57 iron, 8.73 gangue, and 20.30 carbon. Its reaction kinetics BF examined by nonisothermal tests modeled. Thereafter, influence of replacing 10% ore with on performance studied numerical simulations. Results showed that behavior could be modeled using previously proposed model under ags = 1900 m2·m−3. Numerical simulations production 6250 t hot metal per day (tHM/day) efficiently improved operation for coke saving. operation, reached full iron-oxide reduction above cohesive zone (CZ) conversion 85%. By CCB, thermal state upper part significantly changed while it not influenced lower part; retarded before temperature 1073 K prompted after local gas utilization tends to increase CZ. CZ, top decreased 8 K, increased 1.3%, productivity 17 tHM/day, rate 52.2 kg/tHM, 101 kg/tHM. Considering energy consumption sintering coking, have significant energy-saving CO2-emission-reducing effect iron making.