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Porous plug
    Characterized by stable structure, broad range of air permeating, easy adjustment of air-flow, higher target-hit ratio, scouring resistance, erosion resistance and long service life. This porous plug is made of tabular alumina and high purity spinel as starting material. The service life of the products can synchronize with ladle lining when applied in medium-and small-sized continuous casting ladle and the product's service life can be over 30 heats when used in refining ladle. Monolithic or separated forms can be adopted according to in-site conditions.