Magnesia carbonaceous magnesia refractory is the mid-60s, successfully developed by the United States, 70 years, the Japanese steel industry began to use magnesia carbon bricks for water-cooled EAF steelmaking. Magnesia carbon bricks are currently used extensively in steelmaking worldwide and have become a traditional use of graphite. In the early 1980s, magnesia-carbon bricks began to be used as linings for oxygen top-blown converters. At present, most of the materials used for oxygen top-blown steel linings in the UK are magnesia-carbon bricks, with a lining life of 1,000 times to 1,500 times, and in Japan, linings have a life of 2,000 times to 2,500 times.?