Abstract:An imported specularite concentrate has an iron grade of more than 65%, stable output, low harmful impurities, and high cost performance. If it can be used in large quantities, it can alleviate the pressure of shortage of high-quality iron powder. For this reason, the common sintering ore blending scheme is used in China's iron and steel enterprises to carry out the research on the ore blending and metallurgical performance research of the ore. The results show that in the conventional ore blending scheme, the specularite concentrates is blended with 10%~26%, and the sintering performance and metallurgical properties are good; when the refined powder replaces 10% of the same type of commonly used imported refined powder, the sintering machine utilization factor is greatly increased from 1.37 t/(m2·h) to 1.47 t/(m2·h), and the drum strength is increased from 62.67% to 63.47%; when the refined powder is blended with 26% to replace imported refined powder and a certain coarse powder from Brazil, its utilization factor remains basically unchanged, but the drum strength is greatly increased to about 67%, which can significantly improve the strength of sinter. Analysis of the metallurgical properties of the finished sinter with different blends shows that the degrees of reduction (RI) and reduction pulverization (RDI+3.15mm) are respectively about 78% and 63%, both of which can meet the demand of blast furnace smelting. In the sintering industry test, the production data shows that adding 10% of the specularite concentrate can greatly reduce the blending ore cost of sintering production, and the production improvement effect of the 450 m2 sintering machine is more significant.