| 摘要 |
PURPOSE: Refractories used for repairing the damaged parts of hot iron runner of blast furnace urgently are provided to shorten the repairing time and extend the life of hot iron runner. CONSTITUTION: The refractories excellent in early strength and workability comprise the components of: fused alumina with different particle sizes such as 3-5mm(3-6wt.%), 1-3mm(16-22wt.%), 0.5-1mm(14-18wt.%), and up to 0.074mm (15-17wt.%); 7-12wt.% of SiC; 3-4wt.% of graphite powder; 5-7wt.% of carbon black for the increase of adhesion, 6-8wt.% of cokes powder(0.5-1mm); 3-4wt.% of silicon for the increase of strength; 13-14wt.% of tar for good workability; and 3wt.% of organic fiber, calculated by extrapolation.
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