Refractory for annealing furnace

Heat treatment furnace is a thermal equipment used to heat metal to improve its microstructure. The furnace type of heating furnace is a lot of, press operation mode to divide into commonly intermittently type and continuous type. Heat treatment furnace use temperature, generally lower than soaking furnace and heating furnace, no chemical erosion, due to temperature fluctuations and easy to produce thermal shock, so in the selection of refractory, should consider thermal shock index. However, the common clay brick, high aluminum brick and light thermal insulation clay brick and high aluminum brick have better results. Cordierite brick, silicon carbide brick and corundum brick are used for certain places with rapid temperature change, such as furnace door. In order to improve the thermal insulation effect, in recent years, the traditional light refractory brick is generally replaced by refractory fiber.