AN INVESTIGATION ON COAL BLENDING OF INJECTION OF PULVERIZED COAL INTO BLAST FURNACE AT PZH STEEL
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摘要: 为确定合适的配煤喷吹方案, 在实验室条件下, 对攀钢高炉喷吹用煤粉进行了单种煤及混合煤的燃烧实验。实验结果表明:配煤能够改善无烟煤的燃烧效果;配煤组合及配比对混合煤燃烧率影响较大;几种煤组成的混合煤中, 当烟煤配比为 40%~ 50%时, 混合煤的燃烧效果最好;除化学成分外, 煤显微组成对燃烧效果也有影响。Abstract: To decide on the proper coal blending plan, a combustion experiment with individual and blending coals injected into blast furnace at PZH Steel was carried out in laboratory.It is concluded that coal blending can improve the combustion properties of anthracite coal.Coal blending combination and mixing-ratio have obviously effect upon combustion rate of blending coals.Among the blended coals composted of several coals, better combustion efficiency has been achieved at 40%~50% smoke coal blending rate.Apart from the chemical composition, the microstructure of coal has an effect on combustion efficiency.
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Key words:
- blast furnace /
- injection of pulverized coal /
- coal blending /
- combustion rate
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