METHOD OF REPROCESSING THE RAW MATERIALS INTO THE REFRACTORY ONE Russian patent published in 1995 - IPC

FIELD: petrochemical industry. SUBSTANCE: chromo-alumina by-products of the petrochemical industry are moistened with the organic binder solution and are mixed up. Briquets are moulded of the obtained mixture, are burned, are cooled after the isothermic endurance and are disintegrated into powder with the size less than 0.5 mm. A fraction smaller than 0.063 mm is extracted out of the powder and is used. Drying is exercised at 100-110 C. Roasting is carried out at 1300-1400 C with the isothermic endurance 20-30 min. The material consists of 95-98% of chromo-alumina by-products, the rest part is the organic binder. EFFECT: enhanced usage of the petrochemical by-products. 1 cl, 1 tbl