Self-reduction of Manganese-rich Slag Briquette Containing Carbon

The self-reduction experiment of manganese-rich slag briquette containing carbon was carried out in a high-temperature carbon tube furnace. The main factors affecting the reduction rate were analyzed, and the kinetic model of reduction was established. The results show that the increase of basicity of briquette has an obvious effect on improving reduction rate. When the carbon ratio of briquettes is 1. 2 and its basicity is 1. 0, the reduction rate can reach 90%. It can accelerate reduction process and decrease reduction time when the appropriate flux CaF2 is added to the briquette. The apparent activation energy of chemical reaction is 24. 07 kJ/mol, and the apparent activation energy of internal diffusion is 107.55 kJ/mol by calculation. Therefore, the reduction rate of briquette is determined by the mass transfer of CO in the product layer.