FIELD: refractory materials. SUBSTANCE: to form refractory paste, in particular on alumina-containing surface that is exposed to heavy-duty conditions, powder mix is used containing aluminum oxide and at least 5 wt.% of combustible metal including, in turn, 50% aluminum and 3 to 10% substance reducing absorption capacity, namely one or several additives selected from aluminum fluoride, barium sulfate, and calcium fluoride. Ceramic welding technique is used consisting in applying, on surface to be repaired, powder mix in gaseous oxygen to incite reaction between combustible particles and oxygen on the surface. Heat evolving from this reaction is used to form repair paste. EFFECT: improved repair quality. 22 cl, 3 ex
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