一种自焙炭块的导热系数  

HEAT CONDUCTIVITY OF SELF BAKING CARBON BRICK

作　　者：薛向欣[1] 段培宁 黄晓煜[2] 杜英敏[3] 

机构地区：[1]东北大学材料与冶金学院 [2]鞍山钢铁公司炼铁厂 [3]中科院沈阳金属研究所

出　　处：《中国有色金属学报》1998年第4期652-656,共5页The Chinese Journal of Nonferrous Metals

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。Temperature dependence of heat conductivity λ of self baking carbon brick (SBCB) in temperature range of 200～1 100 ℃ has been estimated by using a formula λ=αc p D b combining with the measured data of thermal diffusivity α (laser pulse), heat capacity c p (calorimetry) and bulk density D b (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 graphitization 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 0.722 7, 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.

关 键 词：自焙炭块 导热系数 石墨化度 高炉 炉缸 

分 类 号：TF573.1[冶金工程—钢铁冶金] TF576.4