电站锅炉用SiC质耐火材料抗渣性的研究  

Slag resistance of SiC refractories for power station boiler

作　　者：叶昌[1] 陈冬林[2] 夏清[1] 

机构地区：[1]长沙理工大学材料科学与工程研究所,湖南长沙410004 [2]长沙理工大学能源与动力工程学院,湖南长沙410004

出　　处：《耐火材料》2009年第4期267-269,共3页Refractories

基　　金：国家自然科学基金项目(No.50576005)

摘　　要：以SiC粉和Al2O3粉为主要原料,分别添加5%(质量分数,下同)的ZrO2粉或锆英石粉和5%、10%的Cr2O3粉以及4%的羧甲基纤维素(CMC),按照配料组成配料后,以成型压力为20MPa制成40mm×40mm×30mm的试样。试样经120℃干燥8h后,置于硅钼棒炉中,于1420℃保温5h烧成后,分别采用经900℃保温2h处理后的粉煤灰在1400和1450℃下进行抗侵蚀试验。结果表明:SiC质材料随着温度的升高,抵抗灰渣侵蚀能力不断下降,在1400℃时的抗渣性明显优于1450℃时的;在SiC质材料中分别加入5%的ZrO2或锆英石,前者的抗渣性能强于后者;含Cr2O3为10%的SiC质材料比含5%Cr2O3的具有更好的抗渣性。The specimens were prepared using SiC powder and AI203 powder as starting materials, adding 5% （mass percent） ZrO2 powder,5% zircon powder, 10% Cr2O3 powder and 4% carboxymethylcellulose （CMC） ,molding into 40 mm×40 mm×30 mm under 20 MPa. After drying at 120 ℃ for 8 h,the specimens were put into silicon molybdenum furnace and fired at 1420℃ for 5 h,then the slag resistance was tested at 1400 and 1450℃ using fly ash （treated at 900℃ for 2 h ） as corrosion agent. The results showed that： the corrosion resistance of SiC refractories decreased gradually as temperature increasing, which was much better at 1 400℃：; than that at 1450℃. Slag resistance of SiC refractories with 5% ZrO2 was better than that of with 5% zirconia,specimen with 10% Cr2O3 had better slag resistance than that of with 5% content of Cr2O3.

关 键 词：电站锅炉 SiC质 粉煤灰 抗渣性 

分 类 号：TQ175.732[化学工程—硅酸盐工业] TG174.44[金属学及工艺—金属表面处理]