Collecting device for cathode square steel head smoke during roasting of aluminum electrolysis cell

A collecting device for cathode square steel head smoke during roasting of an aluminum electrolysis cell is composed of an air collecting cover body, baffles, a transition pipe, a branch soft connecting pipe, a header soft connecting pipe, a header three-way pipe and a branch smoke pipe. The air collecting cover body is formed by tightly connecting a plurality of air collecting covers. Each air collecting cover is composed of an outer angle plate, an inner angle plate and an air hole. The baffles are arranged at the two ends of the air collecting cover body, so that the air collecting cover body and the two baffles form a closed space, and a negative pressure cavity is formed in the air collecting cover body. The transition pipe penetrates through the baffle arranged at one end of the aircollecting cover body and communicates with the negative pressure cavity. The other end of the transition pipe communicates with the branch soft connecting pipe. The branch soft connecting pipe communicates with the header so