HOT REPAIRING METHOD FOR CONVERTER TAPPING HOLE

摘要

PURPOSE:To improve the adhesive property and the shape maintainability as just after repairing work, by constituting a nonaqueous repairing material by combining the specific ratio of powdery resol type phenol resin and granular pitch in a basic refractory material. CONSTITUTION:The nonaqueous hot repairing material for a tapping hole of a converter consists of addition of 2-11pts.wt. of the powdery resol type phenol resin and 6-22pts.wt. of the granular pitch to the 100pts.wt. of the basic refractory material. The using rate of the pitch is preferable to be much than the using rate of the resol phenol resin. Further, the granular pitch needs to be about >=0.2mm grain size. The repairing material having such a composition, is applied to the shape having curved surface, such as the tapping hole of the converter, and the operation is immediately executed after the repairing work.