摘要
将CrO3粉与Al粉按1∶2(物质的量比)配料,加入适量的稀释剂Al2O3粉、添加剂NaF粉和结合剂混匀后,压入高炉风口的型腔内,在空气中燃烧合成了风口的陶瓷涂层。利用XRD、SEM和EDS分析了该涂层材料的物相与显微结构,并结合该材料的性能指标分析了其用作风口涂层的可行性。结果表明:燃烧合成陶瓷涂层材料的主要物相是Cr2N、α-Al2O3和Cr,其耐火度>1800℃,常温耐压强度58.8MPa,体积密度1.36g.cm-3,显气孔率57%,600℃时的热导率0.796W.(m.K)-1。因此,该材料耐高温,耐磨损,抗渣铁侵蚀,用其作高炉风口的陶瓷涂层不但可以有效延长风口的寿命,而且还有很好的保温、节能效果。
A new ceramic heat - resistant material as BF tuyere coating was synthesized by the self-propagating high temperature synthesis of CrO3 powder,Al powder and Al2O3 powder in air atmosphere. The phase compositions and microstructures of the coating were analyzed by XRD,SEM and EDS. Feasibility of preparation for tuyere coat material is discussed in the view of the performance index. The results show that the coating has Cr2N,α-Al2O3 and Cr as main phases,cold crushing strength 58.8 MPa, refractoriness over l800℃, apparent porosity 57% ,bulk density 1.36g·cm^-3 ,thermal conductivity （at 600℃） O. 796 W·（m·K） ^-1 The coating has high resistances to high temperature, abrasion, and slag or iron corrosion, and can not only lengthen the service life of BF tuyere,but also has good insulating and energy-saving effects.
出处
《耐火材料》
EI
CAS
北大核心
2005年第5期351-353,360,共4页
Refractories
基金
教育部重点项目:国家杰出青年基金项目(50325209)。
