The metallurgical gate valve is installed on the combustion air, gas, cold air and flue gas pipes of the hot blast stove system, cutting off the medium. In general, the gate works only in the full open or full off state and is not suitable for use as an adjustment or throttle. Suitable for combustion air, gas, cold air and flue gas piping in blast furnace hot blast furnace system Wedge block is arranged on both sides of valve body to realize forced sealing Cemented carbide sealing surface