In recent years, the new energy market has a bright prospect, and the demand for battery metals such as lithium and nickel has risen significantly. The development and utilization of lithium ore has become the focus of attention. The lithium ore beneficiation process includes crushing and screening, grinding and classification, sorting, concentrate dehydration and other stages. In this article, we will take you to understand the beneficiation equipment required for each stage of lithium ore beneficiation.
Use the table of contents below to navigate through the guide:
According to the treatment principle of "more crushing and less grinding", in the crushing and screening process of lithium ore, a three-stage one closed-circuit crushing and screening process or a two-stage one closed-circuit crushing and screening process can be adopted. Which process to use depends on the particle size of the raw ore. Compared with the two-stage, one-closed-circuit crushing and screening, the three-stage, one-closed-circuit crushing and screening can solve the problem of coarse particle size and large particle size fluctuation of lithium ore, which can ensure the processing capacity of raw ore and improve the production index of lithium ore.
At this process, jaw crusher and cone crusher are mostly used in crushing equipment. Among them, jaw crusher is used for coarse crushing of lithium ore, cone crusher is used for medium and fine crushing of lithium ore, and the screening equipment is mainly circular vibrating screen.
In the grinding and classification process of lithium ore, a closed-circuit grinding and classification process can be adopted in order to ensure that the lithium mineral is fully dissociated from the gangue mineral monomer. The first process grinding equipment can use wet grid ball mill, rod mill, etc. When secondary grinding is required, a wet overflow ball mill can be selected as the grinding equipment at this process. The classifying equipment can adopt the classifying type hydrocyclone group.
Depending on the ore properties of different lithium ores, some lithium ores may require desliming after the grinding process. The use of desliming equipment can choose concentrated hydrocyclone group, inclined plate thickener and so on.
Since lithium ore usually has a variety of different associated minerals, comprehensive recycling of lithium ore often needs to be considered. In the beneficiation process, the beneficiation process of lithium ore is mainly based on the flotation process. It is also often combined with gravity separation, magnetic separation and other processes to form a joint sorting process.
Ore-type lithium ore generally includes spodumene, lepidolite, and feldspar. Flotation is the main beneficiation process for these lithium ores. Its technological process varies according to the type of minerals. In this process, the aerated agitated flotation machine and the mechanically agitated flotation machine are often used as the main flotation equipment.
Inflatable stirring flotation machine can choose KYF flotation machine and XCF flotation machine. Mechanical stirring flotation machine can choose SF flotation machine, JJF flotation machine, BF flotation machine, etc. Among them, the XCF type flotation machine can be combined with the KYF type flotation machine to form a flotation unit, which can realize the horizontal configuration of the flotation unit without using a foam pump, and reduce the infrastructure cost required for the stepped configuration.
Lithium ore containing tantalum and niobium minerals is generally treated by a combined process of gravity separation and flotation, and gravity separation is used to recover tantalum and niobium minerals with a large proportion. The optional gravity separation equipment at this process includes shakers, centrifugal concentrators, etc.
Magnetic separation generally appears in the process of lithium ore beneficiation as a means to improve the quality of lithium concentrate. It mainly uses the magnetic difference between minerals to remove the magnetic minerals in the lithium concentrate to obtain a lithium concentrate with a lower iron content. Since the magnetic minerals in lithium ore are mostly weak magnetic minerals, strong magnetic magnetic separators, high gradient magnetic separators, etc. are generally used as the beneficiation equipment at this process.
In order to obtain high-quality lithium concentrate, the lithium concentrate product needs to be concentrated and dehydrated after beneficiation. At this process, a hydraulic center-driven high-efficiency thickener can be selected for concentrate concentration. In order to further achieve the required water content, the concentrate needs to be sent to the dewatering operation through the slurry pump. The main equipment of the dewatering operation can choose the disc vacuum filter, disc vacuum filter and other equipment.
The above is the beneficiation equipment required in the lithium ore beneficiation process. In actual production, the selection of beneficiation equipment needs to be determined according to the specific beneficiation process and processing capacity. In order to avoid the waste of resources caused by inappropriate selection, it is recommended to carry out a beneficiation test before building a beneficiation plant, and to determine the beneficiation process and supporting beneficiation equipment through scientific and reasonable means.