Slag discharge valve

The utility model provides a slag discharge valve. The valve comprises a valve body, a valve element, a valve rod and a driving assembly. The valve body is provided with a containing cavity, a slag inlet and a mounting hole, the valve element is movably arranged in the containing cavity and located at the slag inlet, the valve element has a closing position and an opening position for blocking theslag inlet in the moving direction of the valve element, the valve rod penetrates through the mounting hole, the first end of the valve rod extends into the containing cavity to be connected with thevalve element, the second end of the valve rod extends out of the containing cavity, and the driving assembly is in driving connection with the second end of the valve rod; the driving assembly comprises a support, two supporting arms and a driving piece, the first ends of the two supporting arms are symmetrically arranged on the outer circumferential wall of the valve rod, the second ends of thetwo supporting arms are co