Composition and method of coating the refractory surface of a furnace herewith

Claim 1

THE METHOD OF MAINTAINING AGAINST PROGRESSIVE DESTRUCTIVE IMPAIRMENT THE REFRACTORY FLAME EXPOSED SURFACES OF A HIGH TEMPERATURE FURNACE WHILE THE FURNACE IS IN OPERATION, SAID SURFACES BEING FROM THE GROUP CONSISTING OF SILICA BRICKS OF ACID CHARACTER AND MAGNESITE AND CHROME MAGNESITE, BOTH BASIC MATERIALS, AND NEUTRAL STRAIGHT HEAT RESISTING PROPERTIES OF THE FINAL FURNACE SURFACES, SAID A FINELY POWDERED CHROME ORE COMPOSITION WITH WATER PRODUCE A CEMENT SLURRY, SAID COMPOSITION COMPRISING PREDOMINANTLY CHROMITE WHICH IS INSENSITIVE TO THE OPERATING TEMPERATURE OF THE FURNACE AND WHICH DETERMINES THE HEAT RESISTING PROPERTIES CONTAINING MORE THAN ENOUGH CHROME ORE COMPOSITION CONTAINING MORE THAN ENOUGH IRON OXIDE TO FORM AN IRON CHROME SPINEL, THE FREE IRON OXIDE AMOUNTING TO BETWEEN 4% AND 6% AND SERVING AS A FLUXING AGENT, SPRAYING THE CEMENT SLURRY UNDER HIGH PRESSURE AND IN PROGRESSIVE FASHION UPON THE FLAME EXPOSED SURFACES OF THE FURNACE WHILE THE FURNACE IS AN OPERATION TO FORM A HEAT RESISTING COATING THEREON, AND UTILIZING THE FURNACE HEAT, FIRST TO ACTIVATE THE FLUXING AGENT AND PRODUCE A FUSING BOND BETWEEN THE CHROME ORE COMPOSI-ECTION TION AND THE FURNACE SURFACES AS THE COATING IS GRADUALLY BUILT UP BY THE SPRAYING OPERATION AND, SECOND, TO SET AND HARDEN THE COATING AFTER IT HAS BEEN BONDED TO THE FURNACE SURFACES AND CONVERT IT INTO A SOLID INTERGRATED SHEET MASS WHICH PROTECTS THE FURNACE SURFACES AGAINST DESTRUCTIVE IMPAIRMENT.

Claim 2

THE METHOD OF MAINTAINING AGAINST PROGRESSIVE DESTRUCTIVE IMPAIRMENT THE REFRACTORY FLAME EXPOSED SURFACES OF A HIGH TEMPERATURE FURNACE WHILE THE FURNACE IS IN OPERATION, SAID SURFACES BEING FROM THE GROUP CONSISTING OF SILICA BRICKS OF ACID CHARACTER AND MAGNESITE AND CHROME MAGNESITE, BOTH BASIC MATERIALS, AND NEUTRAL STRAIGHT HEAT RESISTING PROPERTIES OF THE FINAL FURNACE SURFACES, SAID A FINELY POWDERED CHROME ORE COMPOSITION WITH WATER PRODUCE A CEMENT SLURRY, SAID COMPOSITION COMPRISING PREDOMINANTLY CHROMITE WHICH IS INSENSITIVE TO THE OPERATING TEMPERATURE OF THE FURNACE AND WHICH DETERMINES THE HEAT RESISTING PROPERTIES CONTAINING MORE THAN ENOUGH CHROME ORE COMPOSITION CONTAINING MORE THAN ENOUGH IRON OXIDE TO FORM AN IRON CHROME SPINEL, THE FREE IRON OXIDE AMOUNTING TO BETWEEN 4% AND 6% AND SERVING AS A FLUXING AGENT, SPRAYING THE CEMENT SLURRY UNDER HIGH PRESSURE AND IN PROGRESSIVE FASHION UPON THE FLAME EXPOSED SURFACES OF THE FURNACE WHILE THE FURNACE IS AN OPERATION TO FORM A HEAT RESISTING COATING THEREON, AND UTILIZING THE FURNACE HEAT, FIRST TO ACTIVATE THE FLUXING AGENT AND PRODUCE A FUSING BOND BETWEEN THE CHROME ORE COMPOSI-ECTION TION AND THE FURNACE SURFACES AS THE COATING IS GRADUALLY BUILT UP BY THE SPRAYING OPERATION AND, SECOND, TO SET AND HARDEN THE COATING AFTER IT HAS BEEN BONDED TO THE FURNACE SURFACES AND CONVERT IT INTO A SOLID INTERGRATED SHEET MASS WHICH PROTECTS THE FURNACE SURFACES AGAINST DESTRUCTIVE IMPAIRMENT.