(1.东北大学材料与冶金学院，沈阳 110006;
2.鞍山钢铁公司炼铁厂， 鞍山 114021 ;
3.中科院沈阳金属研究所， 沈阳 110015)
摘 要: 利用激光脉冲法、铜卡量热计法和浸渍法分别测定了不同石墨化度的自焙炭块的热扩散系数α、恒压比热容cp和体积密度Db，并据λ=Dbcpα求出200～1100 ℃该炭块的导热系数λ。结果表明：原始自焙炭块的λ值随温度升高而增大，这可能是由于测试过程中石墨化度随温度升高而明显增加，且λ值与石墨化度成正比所致； 恒温下，λ值随石墨化度增加而增大；在石墨化度较高时，λ值随温度升高而稍有降低。当石墨化度在0.7以上时，国产自焙炭块的λ值接近美国UCAR炭砖的值。
关键字: 自焙炭块 导热系数 石墨化度 比热容 热扩散率
（1.School of Materials and Metallurgy,Northeastern University, Shenyang 110006, P. R. China;
2.Ironmaking Work, Anshan Iron and Steel Complex, Anshan 114021, P. R. China;
3.Institute of Metal Research, Chinese Academy of Science, Shenyang, 110015, P. R. China）
Abstract:Temperature dependence of heat conductivity λ of self-baking carbon brick (SBCB) in temperature range of 200～1100 ℃ has been estimated by using a formula λ=αcp Db combining with the measured data of thermal diffusivity α (laser pulse), heat capacity cp (calorimetry) and bulk density Db (retting method) of the SBCB with different graphitization degrees. The results showed that the heat conductivity λ of the original SBCB is increased with the increment of temperature, and that of the SBCB is increased with the increment of graphitizati on degrees at a given temperature, while that of the SBCB with higher graphitization degrees is decreased slowly with the increment of temperature. For the SBCB with graphitization degree of 0.7227, its λ is more than 14 W/mK . It is true to think that the heat conductivity of the SBCB made in domestic technique is closed to that of the NMA brick of the UCAR.
Key words: self-baking carbon brick heat conductivity graphitization degree
bulk density special heat capacity thermal diffusivity
