-10-第46卷第3期非金属矿Vol.46No.32023年5月Non-MetallicMinesMay,2023垃圾焚烧飞灰浸出液制备硫酸钙和碳酸钙邹威亮曾洁邱云峰徐伊琳叶刚李敏吴昊邓跃全*（西南科技大学材料与化学学院，四川绵阳621010）摘要利用硫酸钠和碳酸钠回收垃圾焚烧飞灰浸取液中的钙离子制备硫酸钙和碳酸钙。分别采用硫酸钠和碳酸钠联用及单一碳酸钠两种方案。结果表明，前者制得的硫酸钙和碳酸钙的纯度和白度分别达到99.44%、95.1%和97.07%、96.6%，后者制得的碳酸钙纯度和白度分别达到97.04%和95.1%，而钙离子回收率分别为97.21%和96.44%；硫酸钙、碳酸钙产品质量分别符合GB/T5483-2008《天然石膏》特级标准和HG/T2226-2019《普通工业沉淀碳酸钙》中橡胶、涂料、造纸、塑料工业用途的标准要求。本研究为飞灰资源化应用提供了新的方法，具有良好的应用前景。关键词垃圾焚烧飞灰；浸出液；钙；硫酸钙；碳酸钙中图分类号：X705；TQ132.3+2文献标志码：A文章编号：1000-8098(2023)03-0010-03PreparationofCaSO4andCaCO3fromMSWIFlyAshLeachingLiquidZouWeiliangZengJieQiuYunfengXuYilinYeGangLiMinWuHaoDengYuequan*(SchoolofMaterialsandChemistry,SouthwestUniversityofScienceandTechnology,Mianyang,Sichuan621010)AbstractInthispaper,calciumsulfateandcalciumcarbonatewerepreparedbyaddingsodiumsulfateandsodiumcarbonatetorecovercalciumionsfrommunicipalsolidwasteincineration(MSWI)flyashleach.Therearetwomethodsthatoneisusingsodiumsulfateandsodiumcarbonate,theotherissodiumcarbonatealone.Theresultsshowthatthepurityandwhitenessofcalciumsulfateandcalciumcarbonateproducedbytheformerwere99.44%,95.1%and97.07%,96.6%,respectively,whilethepurityandwhitenessofcalciumcarbonateproducedbythelatterreached97.04%and95.1%,respectively,Therecoveriesofcalciumionswere97.21%and96.44%,respectively;ThequalityofcalciumsulfateandcalciumcarbonateproductsareinlinewiththeexcellentstandardofGB/T5483-2008"NaturalGypsum"andthestandardrequirementsofrubber,paint,papermakingandplasticsindustrialusesofHG/T2226-2019"OrdinaryIndustrialPrecipitateCalciumCarbonate".Thisresearchprovidedanewwayfortheresourceutilizationofflyashrecycling,anditsapplicationprospectisverygood.KeywordsMSWIflyash;leachingliquid;calcium;CaSO4;CaC...
