Relationship Between Porosity Characteristics and Thermal Conductivity of Different Graphite Size Containing Carbon Refractories

High-property carbon refractories for blast furnaces should have high thermal conductivity and excellent porosity characteristics. The relationship between porosity characteristics and thermal conductivity of different graphite size (100mesh, 200mesh, 325mesh, 600mesh and 100mesh respectively) containing carbon refractories was investigated by using mercury porosimeter and laser thermal conductivity instrument. The results indicate that the thermal conductivity was reduced with the increase of porosity and <0.1 mu m pore volume as well as the decrease of mean pore diameter under the same condition, which was related to the short of thermal conductive route.