Blast furnace charging bucket sealing valve

The invention provides a blast furnace charging bucket sealing valve which comprises a valve seat, a valve plate, a sealing rubber ring and a heating device, the sealing rubber ring is installed on the valve plate, and the valve seat comprises a valve port; the valve port is in contact with the sealing rubber ring, and the contact surface of the valve port is arc-shaped; the heating device is annularly arranged on the inner ring of the valve seat and is used for heating the valve seat; and the valve seat is arranged on the body of the charging bucket. The valve port contact surface of the sealing valve is arc-shaped, so that the service life of the sealing rubber ring can be prolonged; and by arranging the heating device, the valve seat can be heated, the problem of air leakage caused by hardening of dust with large water content on the valve seat can be solved, and therefore the blast furnace charging bucket is prevented from being overhauled in a blowing-out mode. 本申请提供一种高炉料罐密封阀，包括：阀座、阀板、密封胶圈和加热装置，密封胶圈安装于阀板