CR2O3-AL2O3-ZRO2 MELT-CONTAINING IRON OXIDE TYPE CRYSTAL REFRACTORIES AND CELLS AS A STABILIZER AND GLASS FURNACES CONSTRUCTED USING THE REFRACTORIES

摘要

P THE INVENTION REFERS TO REFRACTORY MATERIALS. / P P IT CONCERNS A FROZEN AND CASTING REFRACTORY PRODUCT WHICH, BY WEIGHT ON THE BASIS OF OXIDES, IS THE FOLLOWING: 1 TO 74 OF CRO, 15 A 40 FROM ZRO, 3 TO 76 FROM ALO, 7,5 TO 20 FROM SIO AND 0,4 TO 2,5 FROM NAO, THE SIONAO REPORT BEING INCLUDED IN THE RANGE RANGING FROM 5 TO 15 ABOVE AND THE NAO THAT CAN BE REPLACED , IN WHOLE OR IN PART, BY A TECHNICALLY EQUIVALENT AMOUNT OF AT LEAST ONE OTHER ALKALI METAL OXIDE, CHARACTERIZED IN THAT IT ALSO CONTAINS AT LEAST ONE OXIDE SELECTED AMONG THE IRON OXIDE AND THE OXIDE OF MANGANESE IN A PROPORTION BETWEEN 0.3 AND 4 INCLUSIVE, THE SUM OF THE ABOVE CONSUMED INGREDIENTS CONSISTING OF AT LEAST 97 OF THE TOTAL COMPOSITION. / P P USE FOR THE CONSTRUCTION OF SODOCALCIC GLASS OVENS. / P