| 摘要 |
PURPOSE:To make overall decision of use conditions which affect the wear of carbon- contg. refractories by including detecting rods into the refractories and comparing the characteristics of the detecting rods before and after the use of the refractories. CONSTITUTION:Metallic wires 1 adjusted in diameter or sectional size to a specified size are embedded as the detecting rods into the refractory test piece 2 having the same characteristics as the characteristics of the refractories to be used by directing the longitudinal direction of the wires to the direction of the temp. gradient during the use of the refractories. The test piece 2 is then cut along the metallic wires 1 after the use and the wear of the shape is observed. The metal wires 1 after the use changes to three forms; the part (a) which is largely melted or oxidized, the part (b) which is carbonized and the part (c) which is in the state of the original metal according to the temp. X time X atmosphere of the use conditions. The thermal, chemical and time use conditions to which the refractories are subjected during the use are, therefore, estimated if the characteristics of the metal wires 1, i.e. the revelation conditions of the carbide and oxide of the original metal wires are investigated and measured after use and compared with the original state before use. |
