RTK fused cast abrasive resistance blocks adopt excellent raw materials: mullite clinker, imported bauxite and zircon sand, etc. They are made through melting and casting in electric arc furnace at high temperature. They are mainly used in the positions that require good abrasive resistance and high temperature resistance. For example: the sliding rail block of pusher type reheating furnace, and steel tapping spout of step-type heating furnace and garbage incinerator lining, etc.  According to the different contents of zirconia and crystallographic structure, the products can be divided into three brands: fused cast mullite abrasive resistance block (PRT-FM), fused cast zircon mullite abrasive resistance block (RTK-M), fused cast zircon-corundum abrasive resistance block (RTK-AZ21).   Fused cast zircon-corundum abrasive resistance block (Brand No.: RTK-AZ21)