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With corundum fused magnesia active compound spinel powder as main raw materials, such as the SiO: powder and brine as binder, carbon-free ladle with machine pressure is developed corundum - spinel air brick performance testing results show that the developed packages carbon steel air brick than active magnesium aluminum carbon burning ladle brick has better physical properties and thermal shock resistance Used for ladle wall At the bottom of the bag, ladle low carbon and no carbide to meet the needs of the smelting quality ultra clean steel.