| 摘要 |
Formation of a refractory repair mass, in particular on an alumina-containing surface which is to be exposed to heavy duties, employs a powder mixture comprising alumina and, by weight, at least 5 % of a metallic combustilbe which is at least 30 % aluminium, and 3 to 10 % of an absorbency-reducing agent. A ceramic welding technique is used, in which the powder mixture is projected in gaseous oxygen against the surface to be repaired such that reaction between the combustible particles and oxygen occurs against the surface, thereby releasing the heat of reaction against the surface to form the repair mass.
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