The invention presents yttria elements containing high-density chrome based refractory composites, which consist of: (A) Fused polymeric compound as aggregate, containing: 40 to 50 wt % of particles in size from 1 to 4 mm and 15 to 25 wt % of particles in size below 1 mm; (B) A matrix consisting of fused polymeric compounds with particle sizes below 66 .mu.m, active sintered Al.sub.2O.sub.3, active industrial Cr.sub.2O.sub.3 and Y.sub.2O.sub.3, (C) Binders accounting for 2.5 to 3.5 wt %. Since Y.sub.2O.sub.3 has resistance to the slag corrosion and penetration with its compatibility with slag, it has been introduced to activate the major component Cr.sub.2O.sub.3 crystal lattice in favor with Al.sub.2O.sub.3 so that it helps to reduce the sintering temperature, increase the rate of finished products as well as reduce the manufacturing cost.