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Bauxite beneficiation process

139 28.Apr.2023 KZ Editor

Bauxite beneficiation refers to the process of extracting valuable aluminum, silicon, iron, copper and other metals from bauxite and removing other impurities. The beneficiation process includes crushing and homogenization, pulp grinding, pulp flotation, concentrate tailings slurry concentration, concentrate tailings dehydration and other steps.

crushing and homogenization

The crushing and homogenization of bauxite is the first step in beneficiation. The ore is crushed to below -50mm and homogenized into -25mm particles. The homogenized ore has a uniform particle size, which is beneficial to the subsequent beneficiation process.

pulp grinding

The crushed bauxite is sent to a wet ball mill for grinding to make the particle size reach -50mm. The speed of the ball mill and the material of the liner have a great influence on the grinding effect of bauxite.

Slurry flotation

The ground bauxite is sent to Guangyida integrated flotation system for separation to obtain concentrate and tailings. Flotation is the process of separating valuable metals in bauxite from gangue using flotation agents. Guangyida integrated flotation system has the function of automatically adjusting the pulp concentration and flow rate, which can realize efficient flotation.

Concentrate Tailings Slurry Concentration

The resulting concentrate and tailings are concentrated to remove 80% of the water. The concentrated concentrate and tailings are filtered through a filter press to remove the remaining moisture to a moisture content of 13-18% for truck transportation.

Concentrate tailings dehydration

The concentrated concentrate and tailings are filtered through a filter press to remove the remaining moisture and make it 13-18% moisture for vehicle transportation. The water content of dehydrated bauxite is less than 10%, which can be conveniently loaded and transported.

water recovery

All the removed water is collected in the circulating pool for recycling, and the return water utilization rate is 100%.


In summary, the bauxite beneficiation process includes crushing and homogenization, pulp grinding, pulp flotation, concentrate tailings slurry concentration, concentrate tailings dehydration and other steps. Through these steps, valuable metals such as aluminum, silicon, iron, and copper can be extracted from bauxite and other impurities can be removed. During the beneficiation process, it is necessary to pay attention to controlling the particle size, controlling the concentration and flow rate of the pulp, and adjusting the reagents to ensure the quality and output of bauxite.


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