(1.東北大學(xué)材料與冶金學(xué)院，沈陽(yáng) 110006;
2.鞍山鋼鐵公司煉鐵廠， 鞍山 114021 ;
3.中科院沈陽(yáng)金屬研究所， 沈陽(yáng) 110015)
摘 要: 利用激光脈沖法、銅卡量熱計(jì)法和浸漬法分別測(cè)定了不同石墨化度的自焙炭塊的熱擴(kuò)散系數(shù)α、恒壓比熱容cp和體積密度Db，并據(jù)λ=Dbcpα求出200～1100 ℃該炭塊的導(dǎo)熱系數(shù)λ。結(jié)果表明：原始自焙炭塊的λ值隨溫度升高而增大，這可能是由于測(cè)試過(guò)程中石墨化度隨溫度升高而明顯增加，且λ值與石墨化度成正比所致； 恒溫下，λ值隨石墨化度增加而增大；在石墨化度較高時(shí)，λ值隨溫度升高而稍有降低。當(dāng)石墨化度在0.7以上時(shí)，國(guó)產(chǎn)自焙炭塊的λ值接近美國(guó)UCAR炭磚的值。
關(guān)鍵字: 自焙炭塊 導(dǎo)熱系數(shù) 石墨化度 比熱容 熱擴(kuò)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
