Air distribution device capable of selectively discharging slag

The utility model discloses an air distribution device capable of selectively discharging slag. The air distribution device capable of selectively discharging slag comprises an air distribution plate arranged in a furnace body; a hearth is formed above the air distribution plate; a water-cooling wind chamber is arranged under the air distribution plate; a bottom slag discharge pipe is arranged at the bottom of the air distribution plate; the lower end of the bottom slag discharge pipe passes through the water-cooling wind chamber and extends out of the furnace body, and the upper end of the bottom slag discharge pipe passes through the air distribution plate and is communicated with the hearth; a side slag discharge pipe is also arranged on the side surface of the air distribution plate; an outlet end of the side slag discharge pipe is connected with a slag cooling device; the upper end of the side slag discharge pipe passes through the air distribution plate and is communicated with the hearth; a bell-jar type directional wind cap which corresponds to the side slag discharge pipe is arranged at the area between the bottom slag discharge pipe and the side slag discharge pipe; the bell-jar type directional wind cap is used for directionally sending the wind of the water-cooling wind chamber into the side slag discharge pipe; the air distribution device is high in slag discharging efficiency and thorough in slag discharge.