Low-grade bauxite beneficiation method

15311826613

Welcome to consult Xinhai - customized mineral processing plan

Xinhai can provide you with mineral processing tests, mineral processing process and mineral processing equipment selection, mineral processing plant scheme design and construction drawing design; provide mining mineral processing equipment; provide mineral processing plant construction and equipment installation as well as mine management and operation services.

Consultation 153-1182-6613

15311826613

Click to add WeChat

Get product price

WeChat ID has been copied, add friends, and get manufacturer quotations!

Bauxite is a mineral composed of gibbsite, boehmite or diaspore, and its main chemical component is alumina (Al₂O₃). Bauxite is the main raw material for the production of metallic aluminum, and is also widely used in refractory materials, abrasive materials, chemical industry and other fields. With the rapid development of the aluminum industry, high-grade bauxite resources are decreasing, and the development and utilization of low-grade bauxite is becoming more and more important. This article introduces low-grade bauxite beneficiation method!

At present, the common bauxite beneficiation methods include washing method, flotation method and magnetic separation method.

1. Low-grade bauxite washing method

Washing method is a simple and effective low-grade bauxite beneficiation method. It mainly uses water flushing and mechanical stirring to remove impurities such as clay and fine mud in bauxite and improve the grade of the ore. Generally, the low-grade bauxite is first crushed and screened to remove large impurities and waste rock, and then fed into the ore washer, and an appropriate amount of water is added for stirring and flushing. During the stirring and flushing process, impurities such as clay and fine mud will be taken away by water, while the bauxite particles will remain in the ore washer. Finally, the washed ore is dehydrated and dried to obtain high-grade bauxite products.

This beneficiation method is suitable for various types of low-grade bauxite, especially ores containing a large amount of impurities such as clay and fine mud. However, it can only remove impurities such as clay and fine mud in the ore, and has limited effect on the removal of other impurities, so the improvement of grade is relatively small.

2. Low-grade bauxite flotation method

Flotation is a mineral processing method that uses the physical and chemical properties of the mineral surface to separate bauxite from other minerals by adding flotation agents. The process is to first crush and grind the low-grade bauxite to make the minerals in the ore reach a monomer dissociation state. Then, add flotation agents, stir evenly and send them to the flotation machine for flotation. During the flotation process, bauxite particles are adsorbed by flotation agents, attached to bubbles and float to the surface of the pulp, forming a foam product, that is, bauxite concentrate; while other minerals remain in the pulp and become tailings.

This method has high efficiency in selecting bauxite and is suitable for various types of low-grade bauxite, especially complex ores containing multiple minerals. However, a large amount of flotation reagents are required during operation, which is costly

3. Low-grade bauxite magnetic separation method

Magnetic separation is a mineral processing method that uses the magnetic difference of minerals to separate bauxite from other minerals through the action of magnetic field. The process is to first crush and grind the low-grade bauxite to make the minerals in the ore reach a monomer dissociation state. Then, the ore is sent to the magnetic separator. Under the action of the magnetic field, the magnetic minerals will be adsorbed on the drum of the magnetic separator, while the non-magnetic minerals will be thrown away from the drum, thereby separating bauxite from other minerals.

Magnetic separation can effectively separate bauxite from magnetic minerals and improve the grade of bauxite. It is only suitable for low-grade bauxite containing magnetic minerals. For ores without magnetic minerals, magnetic separation cannot be effectively separated.

The above is an introduction to several common bauxite beneficiation processes. In addition, in order to achieve better beneficiation efficiency, sometimes combined beneficiation methods are selected, such as flotation-magnetic separation combined method, washing-flotation combined method, etc. The combined beneficiation method can give full play to the advantages of different beneficiation methods and improve the grade and recovery rate of bauxite.

The beneficiation of low-grade bauxite is a complex process, and it is necessary to select a suitable beneficiation method according to the specific properties of the ore. In practical applications, multiple beneficiation methods can be combined and optimized to improve the beneficiation effect and resource utilization of low-grade bauxite.