Production of insulative coatings on silicon steel strip

Claim 1

IN THE PROCESS OF PRODUCING REFRACTORY ANNEALING COATINGS ON THE SURFACE OF STEEL STRIP, THE STEPS OF: MIXING AN ALKALINE EARTH OXIDE WITH WATER, SAID ALKALINE EARTH OXIDE BEING IN FINELY DIVIDED FORM AND CONTAINING LESS THAN 6% BY WEIGHT CARBON DIOXIDE AND HAVING A VERY LOW HYDRATION RATE, SAID WATER BEING AT A TEMPERATURE OF ABOUT 20* C. (NOT SUBSTANTIALLY HIGHER THAN 30* C.), THE MIXING OF SAID ALKALINE EARTH OXIDE AND SIAD WATER BEING SUCH AS TO PRODUCE COMPLETELY INTIMATE CONTACT OF SAID OXIDE AND SAID WATER AS RAPIDLY AS POSSIBLE SO AS TO MINIMIZE THE LENGTH OF TIME SAID OXIDE AND SAID WATER ARE IN CONTACT AND SO AS TO PROVIDE A SLURRY OF UNIFORM CONSISTENCY FOR APPLICATION TO THE STRIP; APPLYING THE ALKALINE EARTH OXIDEWATER SLURRY TO THE STRIP TO COAT THE SAME UNIFORMLY; AND DRYING THE STRIP AS RAPIDLY AS POSSIBLE TO DRIVE OFF THE FREE WATER; SAID STEPS OF MIXING, APPLYING AND DRYING BEING CARRIED OUT SUFFICIENTLY RAPIDLY TO PRODUCE, ON THE STRIP, A COATING HAVING NOT MORE THAN 12% COMBINED WATER.