METHOD OF HOT REPAIR OF LINING OR MANUFACTURE OF REFRACTORY PRODUCTS AND POWDER MIX Russian patent published in 1995 - IPC

FIELD: methods of hot repair of linings. SUBSTANCE: methods consists in the feed by a flow of oxygen-containing gas of an exothermic mix of refractory powder from the group: magnesium oxide; aluminium oxide, chromium oxide and hot powder of at least two metals from the group: aluminium, magnesium, chromium, zirconium (not more than 10 mass percent). Use is made of refractory oxides with the content of not more than 0.8 mass percent of silicon oxide and not more than 0.8 mass percent of calcium oxide satisfies the following expression: [SiO₂]% ≅ 0,2 + [CaO] % or [SiO₂]% ≅ [CaO]%. Combustible powder may contain the above metals in the form of an alloy. EFFECT: facilitated procedure. 17 cl