Therefore, the graphite content in the brick should be controlled at about 20%. Magnesia carbon brick has little wettability to slag, excellent spalling resistance and erosion resistance, and is suitable for slag line parts of ladle, especially for multi-furnace continuous pouring. In order to meet the need of producing clean steel, the application part of magnesia-carbon brick has been expanded from the slag line to the side wall during the refining of ladle.