莱钢1000m^3高炉高铝矿冶炼实践

Smelting Practice of High Aluminum Ore in Laiwu Steel's 1000m^3 BF

塞拉利昂矿到厂为块、粉混合矿,具有低硅高铝、块矿软熔性能差的特点,烧结生产中通过改善配矿结构,增加低铝矿,在配加15%塞拉利昂矿(该矿含铝7%左右)的情况下,保证了烧结矿的冶金性能。莱钢1 000 m3高炉配加使用后,通过改善焦炭质量,控制渣中镁铝比,适当提高渣比,稳定高炉炉料结构等,保证了炉况的长期稳定顺行。塞拉利昂矿的使用,吨铁成本降低约25元。

Sierra Leone ore is the mixed ore of lump ore and fine ore in incoming and eharacterized by low-silicon, high-aluminum and worse softening dropping properties of the lump ore. In sintering produc.tion, by improving the ore proportioning structure and increasing low-aluminum ore to ensure the metallurgical properties of sinter, the Sierra Leone ore （with 7% aluminum about） proportion reached 15%. After using the sinter, by improving the quality of coke, controlling the ratio of magnesium and aluminum in slag, suitably increasing slag ratio, Laiwu Steel＇ s 1 000 m^3 blast furnace kept long stable operation. The usage of Sierra Leone ore reduced the cost of per ton pig irnn by 25 Yuan about.