A magnesia carbon brick for converter tap hole is characterized in that it includes an inner brick set (1) and an outer Brick Set (2); the inner brick set (1) is placed in the outer Brick Set (2); a stress adjusting reinforcing layer (3) is arranged between the inner brick set (1) and the outer Brick Set (2); the inner brick set (1) includes the first single element (101) of the inner brick and the second single element (102) of the inner brick. The end of the first single element (101) of the inner brick is longitudinally fixed with an assembly column (1011); the end of the second single element (102) of the inner brick is provided with an inner assembly groove (1021) relative to the inner assembly column (1011); the inner assembly column (1011) is embedded in the inner assembly groove (1021); the outer brick Kit (2) includes the first single element (201) of the outer brick and the second unit of the outer brick The end of the first single element (201) of the outer brick is longitudinally fixed with an outer assembly column (2011); the end of the second single element (202) of the outer brick is provided with an outer assembly groove (2021) relative to the outer assembly column (2011); the outer assembly column (2011) is embedded in the outer assembly groove (2021). 2. The magnesia carbon brick for converter tap hole according to claim 1, which is characterized in that the stress adjusting reinforcing layer (3) comprises a stress adjusting layer (301) and a reinforcing layer (302)
Technical field [0001] the utility model belongs to the field of refractory parts of converter tap hole, in particular to a converter tap hole magnesia carbon brick.
Background technology [0002] converter tap is the only way for molten steel to enter ladle from converter. During tapping, it is necessary to bear the friction, erosion and oxidation of high temperature molten steel and slag, which leads to the low life of tapping port, and it needs to be repaired and replaced continuously, which will not only affect the production cycle, but also affect the quality and production stability of molten steel. [0003] at present, the converter outlet block is basically a single square structure. The brick type design of the tube brick and the block is unreasonable. When the tube brick and the block are heated, the stress is not uniform, and the block is prone to crack and float up. The service life of the block is only about 600 times. The frequency of repairing the tube brick and the block at the converter outlet is high, which restricts the production cycle of the converter.
