Working principle of laterite nickel ore dryer
The drum dryer is used in mineral processing, building materials, metallurgy, chemical industry and other departments to dry materials with a certain humidity or particle size. The application range of cylinder dryer includes tea, Chinese herbal medicine, corn, vegetables, food, chicken manure, slag, towel quilt cover, sawdust, coal slime, desulfurized gypsum, compound fertilizer, honeysuckle, straw briquette fuel, charcoal machinery, wood pellet fuel , sawdust briquetting, agricultural and animal husbandry engineering and other industries.
During the working process of the drum dryer, the dried wet material is sent to the hopper by the belt conveyor or bucket elevator, and then enters the feeding end through the feeding pipe of the feeding machine of the hopper. The inclination of the feeding pipe should be greater than the natural inclination of the material so that the material can flow into the dryer smoothly.
The drum dryer drum is a rotating drum that is slightly inclined to the horizontal line. The material is fed from the higher end, and the heat carrier enters from the lower end, and contacts with the material in countercurrent, and the heat carrier and the material also flow into the cylinder together. With the rotation of the cylinder, the material moves to the lower end under the action of gravity. When the wet material moves forward in the barrel, it receives the heat from the heat carrier directly or indirectly, so that the wet material is dried, and then is sent out at the discharge end through a belt conveyor or a screw conveyor.
The inner wall of barrel is equipped with lifting flight, which can lift the materials and scatter them, increases contact surface of materials and airflow, in order to improve the drying speed and forward the materials advancement. The heat carrier is generally divided into hot air, flue gas, etc. After the heat carrier passes through the dryer, a cyclone dust collector is generally required to capture the material in the gas. If you need to further reduce the dust load in the end gas of the drum dryer, it should pass through a bag filter or wet dust collector before being discharged.