The pre – cast blocks are large refractory that is hard to shape by press. These are made according the client”s need using high speed mixer and vibration shaper with low cement castable. Each block is carefully dried to give wear resistance, corrosion resistance and spalling resistance Precast refractories are manufactured by casting into molds. Such refractories come in varying geometries and grades, from small-sized products such as burner tiles, sleeves, and guide tubes to large-sized products such as blocks for ladle floors and for EAF roofs.
They are used when demanding requirements, such as low volume porosity, high bulk specific gravity, and high strength, must be met. They are also used when it is difficult to install unshaped refractories on site, or when curtailed construction times are desired.