Production of dead burned magnesia

Claim 1

THAT METHOD OF MAKING DEAD BURNED MAGNESIA COMPRISING THE STEPS OF HEATING MAGNESIUM HYDROXIDE TO A TEMPERATURE SUFFICIENT TO CONVERT IT TO CAUSTIC MAGNESIA, MAINTAINING THE MAGNESIA AT SAID TEMPERATURE FOR A TIME PERIOD SUFFICIENT TO REMOVE ALL FREE WATER AND SUBSTANTIALLY ALL CHEMICALLY COMBINED WATER, PASSING THE RESULTING CAUSTIC MAGNESIA WITHOUT INTERVENING HYDRATION AND AT A TEMPERATURE OF AT LEAST ABOUT 600*F, TO MEANS FOR FORMING IT INTO SMALL COMPRESSED BODIES UNDER A PRESSURE OF AT LEAST 20,000 P.S.I. PASSING THE DRY COMPRESSES WHILE STILL HEATED TO AT LEAST ABOUT 600*F, TO MEANS FOR FORMING SMALL BRIQUETTES UNDER A PRESSURE OF AT LEAST ABOUT 20,000 P.S.I. WHILE RECIRCULATING TO THE COMPRESSION FEED AT LEAST ABOUT 15 PERCENT BY WEIGHT OF PREVIOUSLY COMPRESSED MATERIAL, AND THEN PASSING THE HEATED BRIQUETTES TO A FURNACE AND HEATING THEM TO A TEMPERATURE TO PRODUCE DEAD BURNED MAGNESIA AND THEREBY PRODUCING A PRODUCT CONSISTING ESSENTIALLY OF DEAD BURNED MAGNESIA AND OF AT LEAST ABOUT 203 P.C.F. BULK DENSITY.