Patent attributes
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 μm, active sintered Al2O3, active industrial Cr2O3 and Y2O3, (C) Binders accounting for 2.5 to 3.5 wt %. Since Y2O3 has resistance to the slag corrosion and penetration with its compatibility with slag, it has been introduced to activate the major component Cr2O3 crystal lattice in favor with Al2O3 so that it helps to reduce the sintering temperature, increase the rate of finished products as well as reduce the manufacturing cost.
