-43-第46卷第1期非金属矿Vol.46No.12023年1月Non-MetallicMinesJanuary,2023赤泥-粉煤灰免烧陶粒的制备及应用段凯强谢慧娟范智禹院雪梅罗斌*聂登攀（贵州民族大学化学工程学院，贵州贵阳550025）摘要以赤泥和粉煤灰为主要原料，通过添加硅酸钠和碳酸氢钠不需要高温煅烧便可制备出具有吸附性能的陶粒。以陶粒的解体率为评定指标，通过响应曲面研究了赤泥、粉煤灰、硅酸钠和碳酸氢钠的配比对陶粒解体率的影响，研究结果表明：赤泥、粉煤灰、碳酸氢钠和硅酸钠的最佳配比分别为72%、10%、3%和15%，可得到陶粒的最佳解体率为4%。采用X射线荧光光谱（XRF）仪、X射线衍射（XRD）仪和全自动比表面积及孔隙分析仪等对陶粒的组分、表面形貌特征、孔径分布进行研究，免烧工艺制备的陶粒生成了新的铝-硅化合物，陶粒表面具备多孔的特点。将陶粒应用于吸附磷石膏渗滤液中的磷和氟离子，总磷和F-的去除率最高分别可达79.80%和97.28%。关键词陶粒；赤泥；粉煤灰；吸附中图分类号：TQ174.71；X75文献标志码：A文章编号：1000-8098(2023)01-0043-04PreparationandCharacterizationofRedMudandFlyAshNon-firedCeramsiteDuanKaiqiangXieHuijuanFanZhiyuYuanXuemeiLuoBin*NieDengpan(SchoolofChemicalEngineering,GuizhouMinzuUniversity,Guiyang,Guizhou550025)AbstractUsingredmudandflyashasthemainrawmaterials,ceramicparticleswithadsorptionpropertiescanbepreparedbyaddingsodiumsilicateandsodiumbicarbonatewithouthigh-temperaturecalcination.Takingthedisintegrationrateofceramsiteastheevaluationindex,theeffectoftheratiosofredmud,flyash,sodiumsilicateandsodiumbicarbonateonthedisintegrationrateofceramsitewasstudiedbyresponsesurface.Theresultsshowedthattheoptimalratiosofredmud,flyash,sodiumbicarbonateandsodiumsilicatewere72%,10%,3%and15%respectively,andtheoptimaldisintegrationrateofceramsitewas4%.Thecomposition,surfacemorphologyandporesizedistributionofceramsitewerestudiedbymeansofXRF,XRDandfull-automaticspecificsurfaceandvoidageanalyzer.Theceramsitepreparedbynonfiringprocessformedanewaluminumsiliconcompound,andthesurfaceofceramsitewasporous.Ceramsitewasappliedtoadsorbphosphorusandfluorineionsinphosphogypsumleachate,themaximumremovalratesoftotalphosphorusandF-inphosphogypsumleachatewere79...
