莱钢1000 m3高炉高铝矿冶炼实践

摘要

Sierra Leone ore is the mixed ore of lump ore and fine ore in incoming and characterized by low-silicon, high-aluminum and worse softening dropping properties of the lump ore. In sintering production, 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 m3 blast furnace kept long stable operation. The usage of Sierra Leone ore reduced the cost of per ton pig iron by 25 Yuan about.%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1000 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。