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1、Basicbricksforrotarykilns回转窑用碱性砖Cement水泥ICTM.•R.Krischanitz•March08Contents目录Rawmaterials原料Magnesia氧化镁Properties特性SourcesandProduction来源及生产Typesofmagnesia氧化镁的种类Qualitycriterias质量标准Spinels尖晶石矿物Spineltypes尖晶石的种类Flexibilizingeffect弹性效果Wedgesplittingtest楔形劈裂试验Productsandproperties火砖及其特性2PresentationTit
2、leMagnesia氧化镁3PresentationTitlePropertiesofMgO氧化镁MgO的特性highmeltingpointof2,800°C熔点高达2,800°C(refractorinessdependsoftypeandquantityofsecondaryoxides)(耐火度取决于氧化镁的类型以及二次氧化物数量)goodresistancetobasicslagandotherhot-chemicalattacks对碱性炉渣以及其他热化学侵蚀具有良好的抵抗性highthermalconductivity导热率高highthermalexpansion热膨胀率高po
3、orthermalshockresistance抗热震能力不足Improvement改善措施additionofa2ndlessexpansivecomponent“controlledinhomogeneousmicrostructure”添加另一种膨胀率小的组分,(形成）“可控的不均匀微观结构”Spinel尖晶石4PresentationTitleProductionofMgOfrommagnesite用菱镁矿生产氧化镁miningofmagnesite开采菱镁矿Crushing破碎/sorting选矿Calcining煅烧+sintering烧结rotarykiln回转窑orshaft
4、kiln立窑MgCO3MgO+CO2magneticseparation磁选sinteredmagnesia烧结氧化镁1600–1900°C5PresentationTitleProductionofsinteredmagnesiafromseawater烧结海水氧化镁的生产MgCl2+Ca(OH)2Mg(OH)2+CaCl2Mg(OH)2MgO+H2O(Kauster)D~2g/cm3Sintering烧结(1700–2000°C)D~3,4g/cm3orfusing电熔(2800°C)D~3,5g/cm31000°CBriquetting滤块6PresentationTitleRawma
5、terialmagnesia氧化镁原料natural天然氧化镁synthetic合成氧化镁:89-97%MgO97,7-99,3%6-0,2%Fe2O30,5-0,1%1,5-0,1%Al2O3<0,1%0,5-1,9%CaO0,5-1,9%0,5-2,5%SiO2<0,1-0,2%3,05-3,40g/cm³bulkdensity容重3,40-3,45g/cm³7PresentationTitleQualitycriteria质量标准ChemicalComposition化学成分AmountofSecondaryPhases SiO2,CaO,Fe2O3,Al2O3,MnO二次相SiO2,
6、CaO,Fe2O3,Al2O3,MnO的量CaO/SiO2ratio钙/硅比Boroncontent硼含量PericlaseCrystalSize方镁石晶体尺寸BulkDensity/ApparentPorosity容重/显气孔率8PresentationTitlePericlasecrystalsize方镁石晶体尺寸StandardSinteredmagnesia标准烧结氧化镁RD>3,38g/cm3Crystalsize:60–120µmFusedMagnesia电熔氧化镁RD>3,38g/cm3Crystalsize:>500µm晶体尺寸：>500µmLargeCrystalSinte
7、redMagnesia大晶体烧结氧化镁RD>3,38g/cm3Crystalsize:+150µm9PresentationTitleSecondaryphasesofMgO氧化镁的二次相10PresentationTitleCaO/SiO2ratio钙硅(重量)比CaO/SiO2ratio钙硅(重量)比Name名称Formula分子式Short NotationSm<11(0,94)1-1,51,5(1,4
