Powder type tailing discharging mechanism and iron phosphate powder collecting device

The invention provides a powder type tailing discharging mechanism which comprises a discharging pipe, the discharging pipe is vertically through, the cross section of the outer wall of the discharging pipe and the cross section of an inner cavity of the discharging pipe are both rectangular, and anti-disengaging strips are horizontally arranged on the two outer sides of the discharging pipe in the X direction; two material baffles are arranged in an inner cavity of the discharging pipe in a hinged mode, the outer sides of the two material baffles are hinged to the inner wall of the discharging pipe, and when the two material baffles are in a horizontal state, the two material baffles close the discharging pipe; the first driving mechanism is used for driving the two striker plates to rotate; a clamping belt groove is horizontally formed in the inner wall of the bag clamping piece, and when the anti-disengaging strip is located in the clamping belt groove, a clamping space is formed between the inner wall of