成的MnO在高温下又与Al2O3反应生成熔点高达1850e的MnO#Al2O3尖晶石,产生膨胀,有利于填充气孔,使材料致密化,因而提高了试样的抗渣侵蚀能力。但因无任何熔体生成,不能保护碳的氧化,试样的抗渗透能力降低。

性较好;在铝炭材料中,当Mn与Al、Si、B4C复合加入且Mn与C的质量比为1B4时,试样的抗渗透效果最好。参考文献

1 张文杰,李楠.碳复合耐火材料.北京:科学出版社,19902 蒋明学,李勇.陈肇友耐火材料论文选.北京:冶金工业出版社,19983 候谨,杜艳华,赵文广,等.Mn对炭材料中碳网络化结构形成的影

响.耐火材料,2003,37(6):336~338

3 结论

在铝锆炭材料中,当Mn与Al、Si复合加入且Mn与C的质量比为1B4时,试样的抗渣侵蚀和渗透

Influenceofmanganeseonslagresistanceofcarbon2bearingrefractories/HouJin,DuYanhua,ZhaoWenguang,etal//NaihuoCailiao.-2004,38(1):37

Al2O3-CandAl2O3-ZrO2-Cspecimenswerepreparedusingsinteredtabularcorundum,zirconia-mulliteandnaturalflakygraphiteasmajormaterials,powdersofMn,Al,Si,B4Casadditivesandphenolicresinascement.Thespecimensweresinteredat1450e.TheslagresistancesoftheAl2O3-CandAl2O3-ZrO2-Cmaterialswerestudied.ResearchresultsshowthatslagresistanceofAl2O3-ZrO2-CmaterialsisgoodwhenMnisaddedwithAl,Si,andthemassratioofmanganesetocarbonis1B4.PenetrationresistanceofAl2O3-CisgoodwhenMnisaddedwithAl,Si,B4C,andthemassratioofmanganesetocarbonis1B4.

Keywords:Carbon2bearingmaterials,Additive,Slagresistance,Manganese,Antioxidant,Carbonnetwork,Alumina-carbonmaterial,Alumina-zirconia-carbonmaterial

Author.saddress:SchoolofMaterialsScienceandEngineering,UniversityofScienceandTechnologyBeijing,Beijing100083,China

(上接36页)

从表3可以看出,研制的免养护轻质耐火浇注料的物理性能指标远比现行标准的指标值高。常温、110e烘干及900e烧后耐压强度比现行标准的规定值分别提高了40%、26%和80%。线变化率减小了40%。

可保证轻质浇注料具有优良的性能。

(2)SiO2超微粉的加入,既可以提高轻质浇注料的高温强度,又可以改善轻质浇注料的使用性能。最佳添加量为5%左右。

(3)研制的免养护轻质浇注料具有烧后线变化率小,高温强度高,施工性能好,不需要养护等优点,性能指标完全满足现行标准的要求,是一种较为理想的新型炉用材料。

3 结语

(1)当免养护轻质浇注料结合剂的用量为12%~15%,促凝剂的用量为结合剂的4.5%~5.5%时,

Developmentofself2curinglightweightrefractorycastable/HuZhihua,YanYun,ZhaoHuiying//NaihuoCailiao.-2004,38(1):35

Theself2curinglightweightrefractorycastable(SLRC)waspreparedwithexpandedlightweightshalegrogs,cenospherandexpandedperliteasstartingmaterialsandsodiumsilicateinsolidstateasbinder.Theeffectsofadditionsofbinder,acceleratorandmicrosilicaontheperformancesofSLRCwereinvestigated.ItisfoundthatSLRCwithexcellentpropertieswasobtainedwhentheadditionofbinderrangesfrom12%to15%andthatofaccelerator4.5%~5.5%.ThemicrosilicacanbothincreasethehightemperaturestrengthandimprovetheperformanceofthedevelopedSLRCwiththeoptimumadditionofabout5%.ThedevelopedSLRChasmanygoodproperties,suchaslowdensity,lowthermalconductivity,highstrength,etc.Itisanidealmaterialfortheliningofvariousfurnaceswithservicetemperaturebelow1100e.

Keywords:Lightweightrefractorycastable,Self2curing,Binder,Accelerator,Microsilica,Heatingfurnace

Author.saddress:InstituteofMaterialsScienceandEngineering,SouthwestUniversityofScienceandTechnology,Mianyang621002,China