The main materials of the Soar unburned slide gate plate are Al2O3-C-based, Al2O3-MgO-based and ZrO3-containing series. Special binder and antioxidant are adopted. It has the advantages of high strength, corrosion resistance and erosion resistance. Its costs war low and it does not pollute the environment. It is an environmental-friendly product and is proved to be the first choice for medium and small-sized ladles.