基于煤显微结构的炼焦用煤评价及应用

为提出适合鞍钢鲅鱼圈分公司的炼焦用煤结构,利用全自动智能型煤岩分析系统分析了鞍钢鲅鱼圈所用不同牌号各炼焦煤的煤岩特征,结合传统炼焦煤煤质指标,对各炼焦煤的煤质特征进行评价,并将煤岩学应用于炼焦配煤煤种调整、配比调整中。结果表明,根据煤岩分类标准,鞍钢鲅鱼圈所用焦煤中含焦煤成分60.2%,肥煤成分31.6%;鲅鱼圈所用炼焦煤中,进口煤煤质较为单一、煤质较好,其中60%以上为单一煤层煤,而国内煤的混煤现象较为严重,单一煤层煤不足20%。煤岩学理论应用于鞍钢鲅鱼圈炼焦生产后,在炼焦煤评价中增加了煤岩学指标,扩大了精煤来源,提高了焦炭质量,焦炭抗碎强度M_(40)从2011年的88.11%提高到2013年的88.87%,焦炭耐磨强度M_(10)从2011年的6.75%降低到2013年的6.38%。 To optimize coking coal structure of Bayuquan Branch,an automatic intelligent analysis system was adopted to analyze the petrology characteristics of different coking coals.Based on the property indexes of traditional coking coal,the property characteristics of coking coal were analyzed and the coal petrography was used to adjust coal varieties and ratios.The results showed that,according to coal petrography classification criteria,60.2% of coal consumed by Bayuquan branch was coking coal,31. 6% was fat coal.More than 60% of imported coal was single coal and the quality of imported coal was homogeneous property,while the domestic coal was a mixture of several coals and the single coal was lower than 20%.The coal petrography was inserted into coking coal evaluation.The crushing strength( M_(40)) increased from 88. 11% in 2011 to 88.87% in 2013,the abrasive resistance( M_(10)) reduced from 6. 75% in 2011 to 6. 38% in 2013