煤制油选煤厂煤显微组分迁移规律  

Migration rule of coal macerals in coal-to-oil preparation plant

作　　者：朱子祺 ZHU Ziqi(CHN Energy Shendong Coal Preparation Center,Yulin 719315,China)

机构地区：[1]国家能源集团神东洗选中心,陕西榆林719315

出　　处：《洁净煤技术》2020年第6期89-95,共7页Clean Coal Technology

摘　　要：神华煤制油选煤厂生产的精煤产品供应煤制油公司作为制油原料,为了进一步提供良好的原料和高质量的制油原料煤,探索煤显微组分在洗选加工过程中的迁移规律,进而为后续生产工艺优化提供新的思路。以煤制油选煤厂的流程样品为试验煤样,通过工业分析、显微镜分析和红外光谱分析方法,结合在线计量工具,分析了不同有机组分在生产过程中的迁移规律,给出了选煤厂提高产品质量的理论途径。结果表明:神东煤制油原料煤H/C比为0.84,属于良好的煤制油原料;原煤灰分为9.45%,镜质组含量为57.88%,惰质组含量为38.18%。0.50~0.25 mm镜质组含量为55.97%,现有工艺未对其进行有效分选,需要加强粗煤泥分选。不同粒级显微组分含量差别不大,通过破碎筛分达到镜质组富集的难度较大。镜质组中88%进入重介精煤,7%进入粗煤泥,5%进入细煤泥;惰质组中59%进入重介精煤,25%进入矸石,7%进入粗煤泥产品,9%进入细煤泥产品。现有分选工艺对惰质组与镜质组的高效分离有待提高,需进一步提高选择性和降低分选密度。The refined coal products produced by Shenhua coal-to-oil preparation plant are supplied to coal-to-oil companies as raw materials for oil production.In order to provide better raw materials and high quality raw coal for oil production,the migration law of coal macerals in the process of washing and processing was explored,and then a new idea was provided for the optimization of the following production process.Taking the process sample of coal-to-oil preparation plant as the test coal sample,and by using process samples,industrial analysis,microscope analysis and infrared spectrum analysis,and combined with on-line measuring tools,the migration of different organic components in the production process was analyzed,and the theoretical approach to improve product quality in coal preparation plant was given.The results show that the H/C ratio of Shenhua raw coal is 0.84,which is a good raw material for coal-to-liquids.The content of raw coal ash is 9.45%,vitrinite content is 57.88%,inertinite content is 38.18%.The content of 0.50-0.25 mm vitrinite is 55.97%.The existing technology does not effectively separate the coarse coal slime,so it is necessary to strengthen the separation of coarse coal slime.It is difficult to enrich vitrinite by crushing and sieving because the contents of macerals in different sizes are not very different.In vitrinite group,88%enter into heavy medium cleaned coal,7%into coarse slime,5%into fine slime,and in inertinite group,59%enter into heavy medium cleaned coal,25%into gangue,7%into coarse slime,9%into fine slime.The high efficiency separation between inertinite and vitrinite by the existing separation process needs to be improved,which includes improving the selectivity and reducing the separation density.

关 键 词：显微组分 迁移 组分富集 镜质组 惰质组 

分 类 号：TD94[矿业工程—选矿]