| 摘要 |
PURPOSE:To enable a waste asbestos material to be reused for a ceramic product by producing a mixture of a given composition by adding by-produced ash from aluminum smelting to the asbestos material crushed or cut coarsely and firing the mixture in an oxidative atmosphere. CONSTITUTION:In the treatment of a waste asbestos material selected from building materials and others containing asbestos, the waste asbestos material, after being crushed or cut coarsely, is incorporated with by-produced ash from aluminum smelting. The mixture produced is adjusted of its composition to approach MgO.2CaO.5SiO2.5/3Al2O3. The waste asbestos material is made harmless by firing the mixture at 800 deg.C or higher in an oxidative atmosphere. The waste asbestos material treated in this way, after being crushed into powder, is incorporated with chamotte for molding, so that a ceramic product is produced by calcination after drying. |
