The invention relates to the technical field of energy-saving rotary
cement kilns, in particular to a heat recycling energy-saving rotary
cement kiln which comprises a base, a plurality of rotating devices are rotatably connected to the upper surface of the base, a
rotary kiln is rotatably connected between the inner sides of the rotating devices, and a first fixing part is rotatably connected to the outer surface of one end of the
rotary kiln in a penetrating mode. The top of the first fixing piece is in through connection with a fan, the top of the fan is in through connection with an air inlet
pipe, the end, away from the fan, of the air inlet
pipe is in through connection with a sealing box, the end, away from the air inlet
pipe, of the sealing box is in through connection with a short pipe, and the other end of the short pipe is in through connection with a feeding piece. When the rodless air cylinder drives the rack to move upwards, the sealing piece at the bottom can be closed, the sealing piece at the top is closed after
cement is put in, the cement is preheated through
waste heat generated by the
rotary kiln, the preheated cement falls into the rotary
kiln, and due to the fact that the temperature of the cement is increased, the needed heat is reduced, and the
energy consumption is reduced. Therefore, the firing
heat consumption of the clinker is reduced.