Bauxite is an earthy mineral containing hydrated alumina impurities. The main component is alumina, which is white or off-white, brownish-yellow or light red due to iron content, opaque, brittle, extremely difficult to melt, insoluble in water, and capable of Soluble in sulfuric acid and sodium hydroxide solution, mainly used in aluminum smelting and refractory materials.

Bauxite drying system is mainly composed of hot blast stove, belt feeder, drum dryer, belt discharger, induced draft fan, cyclone dust collector, bag filter (or wet dust collector) and operation control system . The equipment adopts the downstream drying process

The working principle of the bauxite dryer is as follows: After the wet material enters the drying drum, it is divided into the following work areas: one is the material guide area, where the mineral material and slag enter this area and contact with the high-temperature hot air to quickly evaporate the water, and the material is guided by the large guide angle. Under the movement of the material board, it is introduced into the next working area; the second is the lifting board area, where the mineral material and slag are picked up by the lifting board to form a material curtain state. At this time, the material is in full contact with the hot air, and the moisture in the mineral material and slag quickly Evaporated and stripped into water vapor, the water vapor is then sucked away by the induced draft fan, so as to achieve the purpose of drying the mineral material and slag; the mineral material and slag is dried into a loose state with a moisture content of less than 5% (or lower) in this area, and after heat exchange Finally, the material reaches the required moisture state and enters the final discharge area; the third is the discharge area, where the drum does not have a lifting board, and the material rolls and slides to the discharge port in this area to complete the entire drying process.

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