Experimental Study on Softening-melting Properties of Xuanhua Steel BF Iron Burden
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摘要: 对宣钢高炉炉料结构进行了熔滴性能试验研究。单矿的熔滴试验结果表明:宣钢常用的2种烧结矿软化性能较好,但滴落性能较差,1 520℃仍未滴落;3种球团矿中自产球总体熔滴指标最好但软化区间最长(313℃);2种块矿中PB矿开始软化温度最低软熔区间最长,试验中未能滴落。蒙古矿软熔性能较好,但滴落温度高达1 518℃。通过对15种配矿方案进行的熔滴试验,结果表明:降低烧结矿配比,提高PB矿比例可改善炉料的熔滴性能。在试验条件下,配矿方案为"烧结矿68%+球团矿16%+PB矿16%"的炉料结构熔滴性能最佳。Abstract: 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.
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Key words:
- blast furnace /
- iron burden /
- droplet performance /
- sinter /
- pellet /
- ore
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