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Effect of Flux Addition From Furnace Top on Blast Furnace Operation in Meishan Steel

机译：熔炉顶部对梅山钢的高炉运行影响的影响

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In Meishan Steel of China, some flux, e.g. silica and serpentine, are added from the top of blast furnace (BF) in order to adjust the composition of BF slag. But the addition of flux can increase the slag volume and affect the BF operation, especially in the cohesive zone. Aimed for reducing slag volume and improving BF operation, the softening and melting properties of the flux and flux-bearing sinter are investigated in the present work. The experimental results show that, (1) Silica has no obvious softening and melting phenomena under the simulated BF condition. (2) The melting temperature of serpentine is higher and cannot drip. (3) The higher softening and melting temperature will result in a thicker cohesive zone and have a negative effect on the smooth process of BF. Based on the experimental results, a pilot-scale trial is carried out at No.5 BF of Meishan Steel. The trial results show when the serpentine addition is stopped (the slag basicity may be adjusted by iron ores), the BF is smoothly operated, the flux consumption is decrease by 9.7kg/tHM, and the productive and fuel rate are maintained at 2.268 t/m~3-d and 159kg/tHM, respectively. Therefore, the technical-economic indices are improved in trial period compared with basic period.
机译：中国梅山钢铁，一些助焊剂，例如，二氧化硅和蛇形，从高炉（BF）的顶部添加，以调节BF炉渣的组成。但是添加助焊剂可以增加渣体积并影响BF操作，尤其是在粘性区域中。旨在减少渣体积和改善的BF操作，在本作工作中研究了通量和轴承烧结的软化和熔化性能。实验结果表明，（1）二氧化硅在模拟的BF条件下没有明显的软化和熔化现象。 （2）蛇纹石的熔化温度较高，不能滴水。 （3）较高的软化和熔化温度会导致较厚的粘性区，对BF的光滑过程产生负面影响。基于实验结果，在梅山钢的5号BF进行了试验规模试验。试验结果表明，当蛇形添加停止时（炉渣碱度可以通过铁矿石调节），BF是平稳的，通量消耗量减少9.7kg / thm，生产性和燃料速率保持在2.268 t / m〜3-d和159kg / thm。因此，与基本时期相比，试用期的技术 - 经济指数得到改善。

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