Effect of ore blending optimization on the metallurgical properties of sinter

The structure of sintering material of Yongfeng Iron and Steel Limited Company having been studied to clarify the sintering targets where the sintering pot was optimized for ore matching experiments to achieve the objectives of increasing the ore-forming rate, utilization coefficient, finished mineral grade and drum strength and reducing return fines ratio. Scanning electron microscopy was used to observe the shape of the finished sinter; the effect of optimized ore blending on the reduction performance of the finished sinter was investigated through the reduction test; indicators before and after the optimization of ore blending experiment were compared. The experimental results showed that under such on-site sintering ore blending conditions (the blending ratio of BRBF increasing by 6 %, the fuel ratio reducing to 4 % and the sintering negative pressure being 11 kPa), after ore blending optimization, the drum strength, yield, utilization coefficient, sinter grade and reduction degree of finished mineral were 70.93 %, 84.44 % 1.77 (t/m²·h), 53.7 %, and 83.55 %, respectively, which could guarantee stable production of blast furnace.