Experimental Study on Softening-melting Properties of Xuanhua Steel BF Iron Burden

In this paper softening-dripping experiment was carried out according to Xuanhua Steel blast furnace structure.Single mine drop test results show that the commonly used two kinds of plant of xuanhua steel sinter have good softening performance but poor drop performance where at 1 520℃ it is still dripping; The soft melting of Xuanhua Steel pellet is the best among three kinds of pellets,but its softening range is longest(313℃).The start softening temperature of PB ore is minimum and its soft melting ranges is longest.In addition,PB ore failed to drip in the test.Menggu ore has good soft melting performance but drop temperature as high as 1 518℃.Through drop tests using 15 kinds of ores,the results show that reducing sinter ratio and increasing the proportion of ore PB can improve the softening-dripping performance.Under the experiment conditions,ore matching scheme is as following "sinter68% + ore pellets16% + PB ore16%",the resulting burden structure can achieve best molten droplet performance.