| 摘要 |
PURPOSE: To provide a method for producing a magnesia-carbonaceous refractory brick capable of manifesting characteristics comparable to those of a conventional brick in reutilizing the used magnesia-carbonaceous brick as a brick aggregate in order to reduce the brick cost effectively utilizing a brick waste. CONSTITUTION: A magnesia clinker and carbon are added to 5-50 pts.wt. pulverized brick waste material obtained by pulverizing a magnesia-carbonaceous refractory brick used in a kiln to have the maximum particle diameter or below of an aggregate constituting the brick to make up the total amount to 100 pts.wt. An additive containing an antioxidant is further added to be mixed and regulate the mixture so that the total composition may be 69-89wt.% magnesia, 10-30wt.% carbon and 1-5wt.% additive containing the antioxidant. A binder is then added thereto to carry out the forming and drying of the resultant mixture. A brick waste prepared by removing particles having <1mm particle diameter in the brick waste obtained by pulverizing the refractory brick is especially preferably used and the pulverized brick waste material is preferably used after heat-treating thereof at 100-600 deg.C. |
