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The application of iron carbon agglomerates (ICA) in blast furnace (BF) is considered to be an innovative technology of low-carbon ironmaking. In this paper, the influence mechanism of different reactive ICAs on softening-melting-dropping properties of BF mixed burdens was revealed. The results show that mixing ICA in the ferrous burdens can effectively improve softening-melting dropping properties of mixed burdens and the improvement effect is the best when the iron ore ratio of ICA is 20%~30%. The influence mechanism is: (1) ICA has a coupling effect with the reduction of ferrous burdens, which can promote reduction of ferrous burdens and improve softening-melting performance of mixed burdens. (2) ICA can promote the molten iron carbonization and reduce the viscosity of primary slag, which can improve dropping performance of slag-iron. (3) ICA can support the skeleton of burden bed and space the burdens, which can improve gas permeability of burden bed.

Influence mechanism of different reactive Iron Carbon Agglomerates on softening–melting–dropping properties of BF mixed burdens