摘要
以苏州土、漂珠、氧化铝微球、镁砂、纤维等为原料,采用固相烧结法制备低导热红外辐射陶瓷材料,并对其进行研究。研究结果表明:通过造孔剂和高辐射率晶体材料的引入及优化,可获得气孔分布均匀、导热率低、红外发射率高的低导热红外辐射陶瓷,样品的体积密度为0.95g/cm 3,气孔率为54%~56%,900℃导热系数为0.31W/(m·K),2.5~20μm波长范围内法向全发射率高达0.92。研制的低导热红外辐射陶瓷成功应用于武钢硅钢罩式炉和环形炉,强化了炉内辐射传热,大幅降低了窑炉外壁温度和散热损失,有效提高了炉窑的热效率,节能效果显著。
The infrared radiant porous ceramics were prepared by solid sintering using kaolin,floating bead,microspheric alumina,magnesia and fiber as main raw materials.The microstructure and properties were characterized with SEM,thermal conductance meter and infrared emission spectrometer.The results show that the high infrared emissivity and low thermal conducted ceramics with uniform pore structure were obtained via the addition and control of pore-forming materials and high IR emissivity crystals.The bulk density,porosity,thermal conductivity and IR emissivity of obtained ceramics can reach 0.95g/cm 3,54%~56%,0.31W/m·K(900℃),0.92(2.5~20μm),respectively.The infrared radiant porous ceramics were applied for large-scale industrial kilns successfully,strengthening radiative transfer in furnace and decreasing the heating loss and the outside wall temperature,thus enhancing the thermal efficiency of kilns effectively and reaching the remarkable energy-saving effect.
作者
杜贤武
刘刚锋
宋中华
杨超
丁翠娇
Du Xianwu;Liu Gangfeng;Song Zhonghua;Yang Chao;Ding Cuijiao(Wuhan Branch of Baosteel Central Research Institute(R and D Center of Wuhan Iron and Steel Co.,Ltd.))
出处
《冶金能源》
2020年第3期20-23,共4页
Energy For Metallurgical Industry
基金
国家重点研发计划“冶金、化工炉窑及系统节能减排关键技术”(2018YFB0605900)。
关键词
红外辐射
多孔陶瓷
导热系数
气孔结构
节能
infrared radiation
porous ceramics
thermal conductivity
pore microstructure
energy-saving
