神东地区侏罗纪煤中矿物的热转化特性
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摘要
利用光学显微镜和X射线衍射(XRD)对神东侏罗纪煤中矿物富集样品进行分析,考察神东煤中的主要矿物种类,采用XRD和热重分析研究了气化条件下随温度变化神东侏罗纪煤中矿物的热转化特性,结合热力学软件FaceSage对煤中矿物热转化特性进行模拟。结果表明:神东侏罗纪煤中的矿物主要有黏土矿物、碳酸盐矿物(方解石)、硫化铁类矿物(黄铁矿)、刚玉、石英和赤铁矿;煤灰受热过程中主要发生碳酸盐矿物和硫酸盐类矿物的分解反应及钙铝黄长石、硅灰石和钙长石的形成反应等,在整个煤灰熔融过程中,硅铝酸盐类矿物起着骨架支撑的作用;FactSage能够较准确地模拟煤灰熔融过程发生的矿物热转化行为,神东煤灰受热过程中液相是在900℃左右开始形成,完全转变为液相的温度是1 286℃。
The main mineral species in Shendong coal were investigated using optical microscopy and X-ray diffraction(XRD).The thermal conversion characteristics of minerals in the Shendong Jurassic coal were analyzed with XRD and thermogravimetric in gasification conditions.The thermal conversion characteristics of minerals in coal was simulated with thermodynamic software FaceSage.The experimental results show that the minerals in the Shendong Jurassic coal mainly include clay minerals,carbonate minerals(calcite),iron sulfide minerals(pyrite),corundum,quartz and hematite.The reaction during the heating process of Shendong coal ash is mainly the decomposition reaction of carbonate minerals and sulfate minerals and the formation reaction of gehlenite,wollastonite and anorthite mainly.The aluminosilicate mineral acts as a skeleton support during the Shendong coal ash melting process.FactSage can accurately simulate the thermal conversion behavior of minerals in coal ash melting process.The liquid phase begins to form at about 900℃and the ash is completely converted into liquid phase at 1 286℃ during the heating process of Shendong coal ash.
The main mineral species in Shendong coal were investigated using optical microscopy and X-ray diffraction(XRD).The thermal conversion characteristics of minerals in the Shendong Jurassic coal were analyzed with XRD and thermogravimetric in gasification conditions.The thermal conversion characteristics of minerals in coal was simulated with thermodynamic software FaceSage.The experimental results show that the minerals in the Shendong Jurassic coal mainly include clay minerals,carbonate minerals(calcite),iron sulfide minerals(pyrite),corundum,quartz and hematite.The reaction during the heating process of Shendong coal ash is mainly the decomposition reaction of carbonate minerals and sulfate minerals and the formation reaction of gehlenite,wollastonite and anorthite mainly.The aluminosilicate mineral acts as a skeleton support during the Shendong coal ash melting process.FactSage can accurately simulate the thermal conversion behavior of minerals in coal ash melting process.The liquid phase begins to form at about 900℃and the ash is completely converted into liquid phase at 1 286℃ during the heating process of Shendong coal ash.
引文
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[19]DYK J C V,MELZER S,SOBIECKI A.Mineral Matter Transformation During Sasol-lurgi Fixed Bed Dry Bottom Gasification-utilization of HT-XRD and FactSage Modelling[J].Minerals Engineering,2006,19(10):1126-1135.
[20]麻栋,白向飞.Al2O3对神东煤灰渣熔体特性的影响[J].煤炭转化,2017,40(1):59-64.MA Dong,BAI Xiangfei.Effect of Al2O3on Shendong Coal Ash Fusion Characteristics[J].Coal Conversion,2017,40(1):59-64.
[21]SONG W J,TANG L H,ZHU X D,et al.Effect of Coal Ash Composition on Ash Fusion Temperatures[J].Energy and Fuels,2010,24(1):182-189.
[22]JAK E.Prediction of Coal Ash Fusion Temperatures with the F*A*C*T*Thermodynamic Computer Package[J].Fuel,2002,81(13):1655-1668.
[23]LI Hanxu,YOSHIHIKO N,DONG Zhongbing,et al.Application of the FactSage to Predict the Ash Melting Behavior in Reducing Conditions[J].Chinese Journal of Chemical Engineering,2006,14(6):784-789.
[2]田瑞云.神东矿区开发与保护地下水资源研究[D].阜新:辽宁工程技术大学,2002.TIAN Ruiyun.Research on Development and Protection of Groundwater Reserves in the Shendong Minefield[D].Fuxin:Liaoning Technical University,2002.
[3]白向飞,李文华,张寿禄,等.神东矿区侏罗纪2-2#煤煤质特征研究[J].煤炭转化,2002,25(3):85-88.BAI Xiangfei,LI Wenhua,ZHANG Shoulu,et al.Study on Properties of Shendong Jurassic 2-2#Coal[J].Coal Conversion,2002,25(3):85-88.
[4]张渤,张洪,杨云飞,等.晋城煤粒度变化对灰熔融性影响规律研究[J].燃料化学学报,2018,46(12):1430-1435.ZHANG Bo,ZHANG Hong,YANG Yunfei,et al.Study on the Influence of Particle Size on the Ash Melting Behavior of Jincheng Coal[J].Journal of Fuel Chemistry and Technology,2018,46(12):1430-1435.
[5]麻栋.鄂尔多斯地区不同成煤时代煤灰渣熔体特性研究[D].北京:煤炭科学研究总院,2017.MA Dong.Study on the Coal Ash Melt Characteristics Formed in Different Geological Ages in Erdos[D].Beijing:China Coal Research Institute,2017.
[6]李文,白进.煤的灰化学[M].北京:科学出版社,2013.LI Wen,BAI Jin.Chemistry of Ash from Coal[M].Beijing:Science Press,2013.
[7]禹立坚,黄镇宇,程军,等.配煤燃烧过程中煤灰熔融性研究[J].燃料化学学报,2009,37(2):139-144.YU Lijian,HUANG Zhenyu,CHENG Jun,et al.Study on the Coal Ash Fusibility During Blending Coal Combustion[J].Journal of Fuel Chemistry and Technology,2009,37(2):139-144.
[8]雷鸣,孙岑,王春波.煤加压转化过程中煤焦结构及煤灰矿物相演变规律[J].燃料化学学报,2018,46(8):925-933.LEI Ming,SUN Cen,WANG Chunbo.The Crystal Structure of Coal Char and the Mineral Transformation of Coal Ash During Coal Conversion Under Pressurized Conditions[J].Journal of Fuel Chemistry and Technology,2018,46(8):925-933.
[9]LI Hanxu,XIONG Jinyu,TANG Yongxin,et al.Mineralogy Study of the Effect of Iron-bearing Minerals on Coal Ash Slagging During a High-temperature Reducing Atmosphere[J].Energy and Fuels,2015,29(11):6948-6955.
[10]高娜,刘胜华,刘勇晶,等.碱性氧化物对煤灰熔融特性的影响及机理研究[J].煤炭转化,2014,37(3):42-45.GAO Na,LIU Shenghua,LIU Yongjing,et al.Effect of Alkali Oxides on Ash Melting Characteristic[J].Coal Conversion,2014,37(3):42-45.
[11]杨建国,刘志,赵虹,等.配煤煤灰内矿物质转变过程与熔融特性规律[J].中国电机工程学报,2008,28(14):61-66.YANG Jianguo,LIU Zhi,ZHAO Hong,et al.Minerals Transition Process and Melting Characteristics of Blended Coal Ashes[J].Proceedings of the CSEE,2008,28(14):61-66.
[12]WU Xiaojiang,ZHANG Zhongxiao,CHEN Yushuang,et al.Main Mineral Melting Behavior and Mineral Reaction Mechanism at Molecular Level of Blended Coal Ash Under Gasification Condition[J].Fuel Processing Technology,2010,91(11):1591-1600.
[13]李风海,贾建波,黄戒介.含钙矿物对褐煤灰熔融特性的影响研究[J].煤炭转化,2012,35(4):7-10.LI Fenghai,JIA Jianbo,HUANG Jiejie,et al.Effects of the Calcium Minerals on Melting Characteristics of Lignites Ash[J].Coal Conversion,2012,35(4):7-10.
[14]王嘉剑,刘霞,郭庆华,等.高铁煤灰的黏温特性及熔渣矿物质研究[J].煤炭转化,2017,40(6):48-54.WANG Jiajian,LIU Xia,GUO Qinghua,et al.Study on Viscosity-temperature Characteristics and Viscosity Mineral Behaviors of High-iron Coal Ash Slag[J].Coal Conversion,2017,40(6):48-54.
[15]曹敏,谷小虎,樊崇.义马煤灰高温下矿物质变化[J].煤炭转化,2010,33(1):12-15.CAO Min,GU Xiaohu,FAN Chong,et al.Mineral Behavior in Coal Ash at High Temperature[J].Coal Conversion,2010,33(1):12-15.
[16]李爱莉,考宏涛,郭涛,等.低质煤煤灰高温熔融机理的试验研究[J].混凝土,2012(9):47-49.LI Aili,KAO Hongtao,GUO Tao,et al.Experimental Study of Coal Ash Fusion Mechanism of Low-grade Coal Under High Temperature[J].Concrete,2012(9):47-49.
[17]黄镇宇,李燕,赵京,等.不同灰成分的低熔点煤灰熔融性调控机理研究[J].燃料化学学报,2012,40(9):1038-1043.HUANG Zhenyu,LI Yan,ZHAO Jing,et al.Ash Fusion Regulation Mechanism of Coal with Low Melting Point and Different Ash Compositions[J].Journal of Fuel Chemistry and Technology,2012,40(9):1038-1043.
[18]程军,周俊虎,刘建忠,等.添加剂催化洁净煤燃烧的动态特性研究[J].中国电机工程学报,2002,22(9):128-131.CHENG Jun,ZHOU Junhu,LIU Jianzhong,et al.Dynamic Characteristics of Catalytic Clean Coal Combustion with Additives[J].Proceedings of the CSEE,2002,22(9):128-131.
[19]DYK J C V,MELZER S,SOBIECKI A.Mineral Matter Transformation During Sasol-lurgi Fixed Bed Dry Bottom Gasification-utilization of HT-XRD and FactSage Modelling[J].Minerals Engineering,2006,19(10):1126-1135.
[20]麻栋,白向飞.Al2O3对神东煤灰渣熔体特性的影响[J].煤炭转化,2017,40(1):59-64.MA Dong,BAI Xiangfei.Effect of Al2O3on Shendong Coal Ash Fusion Characteristics[J].Coal Conversion,2017,40(1):59-64.
[21]SONG W J,TANG L H,ZHU X D,et al.Effect of Coal Ash Composition on Ash Fusion Temperatures[J].Energy and Fuels,2010,24(1):182-189.
[22]JAK E.Prediction of Coal Ash Fusion Temperatures with the F*A*C*T*Thermodynamic Computer Package[J].Fuel,2002,81(13):1655-1668.
[23]LI Hanxu,YOSHIHIKO N,DONG Zhongbing,et al.Application of the FactSage to Predict the Ash Melting Behavior in Reducing Conditions[J].Chinese Journal of Chemical Engineering,2006,14(6):784-789.
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