CHROME REFRACTORY MORTARS

AS A FREFRACTORY MORTAR FOR JOINING BURNED BASIC REFRACTORY BRICK OF THE GROUP CHROME ORE, MAGNESIA, MAGNESIA-CHROME ORE, AND CHROME ORE-MAGNESIA, A DRY MIXTURE SUITABLE FOR MIXING WITH WATER AND CONSISTING ESSENTIALLY OF CHROME ORE AND GREEN CHROME SESQUIOXIDE TOGETHER WITH UP TO ABOUT 10%, BY WEIGHT, OF CLAY PLASTICIZER AND WATER-SOLUBLE BINDER, THE CHROME ORE INGREDIENT BEING OF AT LEAST ABOUT 50%, BY WEIGHT, CR2O3 AND CONSTITUTING FROM 50 TO 70 PARTS, BY WEIGHT, OF THE MIX, THE GREEN CHROME SESQUIOXIDE AMOUNTING TO FROM 10 TO 30 PARTS, BY WEIGHT, OF THE MIXTURE, SAID CLAY PLASTICIZER AND WATERSOLUBLE BINDER CONSTITUTING THE REMAINDER, THE TOTAL CR2O3 TO MGO RATIO OF THE BATCH, BY WEIGHT, ON AN OXIDE ANALYSIS, EXCEEDING 3:1.