Reinforced magnesia carbon brick and the main raw material of the tapping hole use magnesia with high purity, high bulk density, high CaO / SiO2, low porosity, crystalline fused magnesia and sintered magnesia; magnesia carbon brick manufacturers use high purity graphite Flake graphite; The binder uses a phenolic resin that can form a mosaic structure at high temperatures. Japan, the country of origin of magnesium-carbon shaped products in the world, has shut down most of its domestic magnesium-carbon brick production lines and some small magnesium-carbon brick production lines. Has changed its functions and used it as a new technology research and development. China has the world's highest quality magnesium ore and graphite resources, coupled with China's low labor costs, making Chinese-made magnesium-carbon shaped products have a very strong competitiveness in the world market. China currently has magnesium-carbon brick manufacturers Nearly 200, with a total annual output of more than 2 million tons. The total annual demand for reinforced magnesia carbon bricks and steel taps in the domestic market is more than 600,000 tons, and there are also international export forecasts of nearly 50 cubic tons. Metal and non-oxide magnesium carbonaceous unburned bricks and steel taps Bricks replace ordinary bricks, and the market space and potential are huge.