<p>The described ceramic mass is meant for the production of compact impenetrable items with a pouring method. The mass contains the following components (percentage of weight):hard-melting clay 25.0-35.0fire resistant clay 12.0-20.0nepheline syenite 12.0-18.0leaning agent 25.0-30.0highly resistant compact fire clay 10.0-20.0electrolytes 0.25-0.40Temperature interval, at which the mass is baked, is 1,060-1,100 degrees C. Total shrink is 13.0-14.5per cent. Linear expansion temperature coefficient is 68.0x10<-7> to 78.0x10<-7> degrees C<-1>. Water absorption of crumb after baking - 0.1-0.5 percent.</p>
