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Relations of the Thermal Conductivity Coefficient and Density of Rock - Mineral Cotion Insulating Materials and Temperature

WU Qingren, ZENG Lingke, LIU Zhenqun, XI Tonggeng

(South — China University of Science and Engineering) (Shanghai Silicate Research Institute of Chinese Academy of Sciences)

Abstract: The relations of the thermal conductivity coefficient and density of rock - mineral cotton insulating materials and temperature are studied by means of steady - state method. The result shows that under certain process condition the rock - mineral cotton insulating materials of fixed chemical compositions get the minimum value of thermal conductiv­ity coefficient at 1 atm and fixed temperature with density scope of 80 - 100kg/m3. The thermal conductivity coeffi­cient in creases non - linearly with the rise of the temperature. The avenues of increasing its heat utilization are also discussed theoretically, thus providing scientific basis for the heat design of ceramic kiln thermal insulating structure.

Keywords: thermal conductivity coefficient, rock-mineral cotton insulating materials, kiln insulating energy saving technology


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