■煤炭深加工四种炼焦煤热解成焦过程微观结构演变王少婷，王杰平，田鑫，肖佳蕙，崔晶晶，李光跃(华北理工大学化学工程学院，河北唐山063200)摘要:实验选取了兖州气煤(YZ)、霍州肥煤(HZ)、范矿肥煤(FK)、新峪焦煤(XY)4种不同变质程度炼焦煤为样品，利用坩埚焦制备了不同热解温度的焦样，利用X射线衍射仪、扫描电子显微镜表征了焦样微观结构的变化，探究了不同变质程度炼焦煤热解成焦过程的微观结构演化。结果显示，不同热解产物石墨片层间距及堆叠高度主要受热解温度影响，热解温度越高，焦样的石墨化程度越有序。随热解温度的升高，热解产物的表面越来越光滑，孔隙和裂缝越来越多，孔径逐渐增大;挥发分含量较高的炼焦煤，热解产物表面的孔隙较多。关键词:炼焦煤;热解过程;微观结构;X射线衍射仪;扫描电子显微镜中图分类号:TQ522文献标识码:A文章编号:1005-8397(2023)02-0061-06MicrostructureevolutionoffourcokingcoalsduringpyrolysisWANGShao－ting，WANGJie－ping，TIANXin，XIAOJia－hui，CUIJing－jing，LIGuang－yue(CollegeofChemicalEngineering，NorthChinaUniversityofScienceandTechnology，Tangshan，Hebei063210，China)Abstract:Intheexperiment，fourcokingcoalswithdifferentmetamorphicdegrees，namelyYanzhougascoal(YZ)，Huozhoufatcoal(HZ)，Fankuangfatcoal(FK)andXinyucokingcoal(XY)，wereselectedassamples，andcokesampleswithdifferentpyrolysistemperatureswerepreparedfromcruciblecoke.ThemicrostructurechangesofcokesampleswerecharacterizedbyX－raydiffractionandscanningelectronmicroscopy，andthemicrostructureevolutionofcokingcoalwithdifferentmetamorphicdegreeswasexplored.Theresultsshowedthatthegraphitelamellarspacingandstackingheightofdifferentpyrolysisproductsaremainlyaffectedbythepyrolysistemperature.Thehigherthepyrolysistemperatureis，themoreorderlythegraphitizationdegreeofthecokesampleis.Withtheincreaseofpyrolysistemperature，thesurfaceofpyrolysisproductsbecomessmootherandsmoother，withmoreandmoreporesandcracks，andtheporesizegraduallyincreases;Thecokingcoalwithhighvolatilecontenthasmoreporesonthesurfaceofpyrolysisproducts．Keywords:cokingcoal;pyrolysisprocess;microstructure;XＲD;SEM收稿日期:2022-12-20DOI:10.16200/j.cnki.11－2627/td.2023.02...
