The utility model discloses a but tower is taken off to convection current formula of admitting air for copper hydrometallurgy, spray section that the tower body includes its upper portion and its lower part drench the board section, be provided with the feed liquor pipe on spray section's the lateral wall, this feed liquor pipe communicates with the water tank that sets up in spray section, the lower extreme of this water tank is provided with a plurality of nozzles that set up side by side, it has first intake pipe still to insert in the spray section, this first intake pipe inserts in the water tank, and the end of this first intake pipe is provided with a plurality of branch pipes, every branch pipe switch on off nozzle, still be provided with the gas outlet on spray section's the lateral wall, the gas outlet is located the top of feed liquor pipe, and outlet duct and outside intercommunication are passed through to this gas outlet, the lower part of drenching board section lateral wall is to being equipped with two air inlets, and is provided with the second intake pipe in every air inlet updip slant, and the upper end of second intake pipe is provided with rotatory nozzle. The beneficial effects of the utility model are that ensured and taken off but efficiency, prolonged the disposition of equipment cycle, convenient clearance.