Taphole Mrx is a functional refractory material that used for the blast furnace. 高爐出鐵口用炮泥是功能性耐火材料。
The steel cylindrical casings using fire proof material,also heat insulating material interiorly, which forms fire-proof structure. 鋼板制成的圓筒外殼中使用了耐火材料,內部也貼有絕熱材料,形成耐火結構。