Strengthening refractory iron ore sintering with biomass fuel.

The productivity of specularite, a type of haematite with more than 66% Fe, and of vanadium-titanomagnetite, with 53.69% Fe, 3.09% Si O2 and 12.69% TiO2, can be greatly increased by partial replacement of coke breeze with biomass of a higher rate of combustion, as they are hard to granulate but in larger sizes reduce the permeability of the sintering bed and hence the speed of sintering. Experiments showed that when 40% of coke is replaced with carbonised biomass the sintering speed and specific production capacity of an ore mix containing 35% specularite were improved from 19.06 mm/min and 1.33 t/m2/h to 21.45 mm/min and 1.47 t/m2/h, while those of an ore mix containing 55% V-titanomagnetite increased from 17.23 mm/min and 1.11 t/m2/h to 22.80 mm/min and 1.44 t/m2/h.
The productivity of specularite, a type of haematite with more than 66% Fe, and of vanadium-titanomagnetite, with 53.69% Fe, 3.09% Si O2 and 12.69% TiO2, can be greatly increased by partial replacement of coke breeze with biomass of a higher rate of combustion, as they are hard to granulate but in larger sizes reduce the permeability of the sintering bed and hence the speed of sintering. Experiments showed that when 40% of coke is replaced with carbonised biomass the sintering speed and specific production capacity of an ore mix containing 35% specularite were improved from 19.06 mm/min and 1.33 t/m2/h to 21.45 mm/min and 1.47 t/m2/h, while those of an ore mix containing 55% V-titanomagnetite increased from 17.23 mm/min and 1.11 t/m2/h to 22.80 mm/min and 1.44 t/m2/h.