Experimental Study on Sintering of Fine Ilmenite Concentrate

In view of the problems of fine particle size and high loss during electric furnace smelting of ilmenite concentrate,the sintering process of fine ilmenite concentrate was studied in this paper.It has the disadvantages of poor granulating,high burnup and low production efficiency for sintering of fine ilmenite concentrate.By physical and chemical detection and phase analysis,the consolidation mechanism of titanium concentrate and the reasons for the poor granulating effect were determined.Experimental results show that by adding flux,optimizing ratio of fuel and water,and grinding the ilmenite concentrates,the granulating effect of the ilmenite concentrates is improved.Through reducing sintering material layer,pelletizing the grinded ilmenite concentrate and adopting fuel divided adding on surface of the material for sintering,the technical and economic indicators of sintering are improved significantly,with the ratio of particles of +1 mm increased from 50.3% to 89.4% and the utilization coefficient enhanced from 0.177 t/（m²·h） to 0.712 t/（m²·h）,respectively.The desulfurization rate of ilmenite concentrate in the sintering process proposed in this paper is about 40%,influencing about 3%～4% of the TiO₂ grade.