Rotary Drum Dryer

Dryer is mainly used for the drying of materials like slag, clay and coal dust in building material industry or metallurgy industry, and leaching slag in metal beneficiation; compound fertilizers with some humidity and particle size or other materials; slag with moisture less than 85%, such as brewer's grains, bean dregs, sprayed concrete corn husk, coal slurry, and fruit residues.

The dryer consists of rotary body, throwing flitch, transmission device, supporting device ,sealing ring, heat source, beater device, belt loading machine, feeding machine, rotary roller, belt discharger, draft fan, discharger, and switch board.

The heat source of dryer is from combustion devices. This dryer adopts direct flow heating method. So the material should be sent to the shell by the feed chamber and feed chute. After that the material will be pushed backward by the spiral shoveling plate. As the dryer is located with a tilt, the material flows to the end by the gravity and circumduction meanwhile it is shoveled repeatedly by the shoveling plate to the upper end then comes down constantly, forming an even curtain in the drum and exchanging heat fully with the hot current in the drum. With the material being raised and scattered again and again, the moisture is dried gradually. Finally it is dried totally.

The dryer of our factory adopts new type throwing flitch device which has multi-functions such as guidance, current sharing and material throwing and can make the materials distributing evenly on the radial section of the dryer. So that the material curtain become thin, even and universal and exposed to the hot current totally thus the heat energy is fully utilized. The dryer in our factory chooses the right operation parameter, the coal consumption and power consumption is 10-15% lower than general dryer, and the output per hour is 10-15% higher.