文章摘要
黏结指数G值表征炼焦煤结焦性的局限性研究
Limitations of characterizing coking properties of coking coal with the value of bonding index G
投稿时间:2014-02-26  
DOI:
中文关键词: 黏结指数G值  炼焦煤  结焦性  高温塑性  成焦光学组织  局限性
英文关键词: value of bonding index G  coking coal  coking property  high temperature plasticity  coking optical organization  limitation
基金项目:
作者单位E-mail
鲍俊芳 武汉钢铁集团公司炼焦煤利用湖北省重点实验室,湖北 武汉,430080 junfangbao@163.com 
詹立志 武汉钢铁集团公司炼焦煤利用湖北省重点实验室,湖北 武汉,430080  
尹秀利 武汉钢铁集团公司炼焦煤利用湖北省重点实验室,湖北 武汉,430080  
项 茹 武汉钢铁集团公司炼焦煤利用湖北省重点实验室,湖北 武汉,430080  
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中文摘要:
      对7组相同变质程度和黏结指数G值炼焦煤煤岩显微组分、高温塑性和成焦光学组织结构进行研究。结果表明,相同变质程度和G值的炼焦煤高温塑性差异明显,软化温度相差3~29℃,固-软温度区间相差8~42℃,最大基氏流动度比值为1.3~1266;其炼焦煤焦炭光学组织结构差异亦明显,粗粒镶嵌结构占比相差9%~43%,同性结构占比相差2%~16%,纤维结构占比相差15%~36%。因此, G值对煤料受热所产生胶质体的数量能较好地表征,但对其结焦性的判断存在缺陷。
英文摘要:
      The maceral, high-temperature plasticity and coking optical structure of 7groups of coking coals with the same metamorphic degree and bonding index G value were studied. The results indicate that coking coals of the same metamorphic degree and G value differ greatly in high-temperature plasticity. Their difference in softening temperature can be as large as between 3~29℃; in solid-soft temperature range, 8~42℃; and in maximum Gieseler fluidity ratio, 1.3~1266. Their coking optical structures also differ hugely, with the difference in mosaic structure proportion at 9%~43%; in same-sex structure proportion, 2%~16%; and in fiber structure proportion, 15%~36%. It is thus concluded that, G value can well characterize the quantity of metaplast arising from coal heating, yet it has limitations when used to judge coking properties of coal.
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