Abstract The cokes produced from single coals and blends of these coals were investigated under the simulated blast furnace (BF) conditions. Comparison of the weighted average values of single coal cokes and the measured values of cokes from blends revealed the coal interactions during carbonisation and the effects of these interactions on coke properties under the simulated BF conditions. Blending coals together resulted in a significant fluidity reduction from the expected values. The large amount of volatile matter released from the low rank coal provided better conditions of crystallites growth for other coal components in the blends, thereby resulting in the pervasively higher measured graphitization degree. Raman spectroscopy analysis indicated that the higher measured graphitization degree was mainly contributed by the lenticular and ribbon microtextures. Although the caking properties of the blends were remarkably reduced from the expected values, the measured microstrength did not have a significant difference from the calculated values. However, the measured macrostrength were higher than the calculated values. The differences in the softening and resolidification temperatures of coals restricted the dilatation but promoted the contraction of the blends, which resulted in a reduced porosity development from the expected value, thereby improving the strength of the produced cokes.

中文翻译：

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模拟高炉条件下炼焦过程中煤相互作用对焦炭特性的影响

摘要 在模拟高炉 (BF) 条件下研究了由单一煤和这些煤的混合物生产的焦炭。单一煤焦的加权平均值与混合焦炭的测量值的比较揭示了碳化过程中煤的相互作用以及这些相互作用对模拟高炉条件下焦炭特性的影响。将煤混合在一起导致流动性比预期值显着降低。低阶煤释放出的大量挥发分为掺合物中的其他煤组分提供了更好的微晶生长条件，从而导致测得的石墨化程度普遍较高。拉曼光谱分析表明，较高的石墨化程度主要是由透镜状和带状微观结构造成的。尽管共混物的结块性能比预期值显着降低，但测量的显微强度与计算值没有显着差异。然而，测得的宏观强度高于计算值。煤的软化和再凝固温度的差异限制了膨胀，但促进了共混物的收缩，导致孔隙度发展低于预期值，从而提高了生产焦炭的强度。测得的显微强度与计算值没有显着差异。然而，测得的宏观强度高于计算值。煤的软化和再凝固温度的差异限制了膨胀，但促进了共混物的收缩，导致孔隙度发展低于预期值，从而提高了生产焦炭的强度。测得的显微强度与计算值没有显着差异。然而，测得的宏观强度高于计算值。煤的软化和再凝固温度的差异限制了膨胀，但促进了共混物的收缩，导致孔隙度发展低于预期值，从而提高了生产焦炭的强度。