| 摘要 |
PROBLEM TO BE SOLVED: To extremely reduce the damage by the oxidation of carbon in a carbon-containing refractory and further improve the tolerance thereof by coating a coating material containing a specific proportion of aluminum on the surface. SOLUTION: This carbon-containing refractory is obtained by coating a coating material containing 6-30wt.% aluminum on the carbon-containing refractory in 10-3,000μm thickness. The coating material acts as a coating layer, blocks the penetration of an oxidative gas such as air into the interior of the carbon-containing refractory and has effects to prevent the refractory from becoming weak by decarbonization by the oxidation of the carbon. Because, the aluminum foils present in a dispersing state in the coating material are strongly adhered to each other through resin component in the coating material and maintain airtightness up to about 600 deg.C. Further, at above 600 deg.C, the aluminum forms an alumina thin layer by an oxidation reaction and a dense layer are formed on the surface. Thereby, the penetration of the oxidative gas is blocked penetrating into the refractory by the aluminum foil and the alumina, and the oxidation of the carbon in the carbon-containing refractory is prevented. |
