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Lepidolite mineral processing technology and equipment is a process used to extract valuable minerals such as lithium from lepidolite ore. The ore typically contains lithium minerals such as spodumene and lepidolite, which are critical to the production of lithium-ion batteries. The beneficiation process involves multiple stages and requires specific technology and equipment. The following is an overview of the techniques and equipment used in this process.
Use the table of contents below to navigate through the guide:
The function of lepidolite crushing and grinding is to grind the raw ore to the appropriate size for subsequent beneficiation processes, improve subsequent beneficiation efficiency, and make it easier for lithium minerals to dissociate from other minerals.
Crushing equipment mainly includes jaw crusher and cone crusher. Jaw crusher is a commonly used primary crushing equipment. When working, it mainly exerts pressure through a pair of fixed jaw plates and swing jaw plates to crush the ore. The raw iron lepidolite ore can be broken from larger blocks into smaller blocks. Cone crushers are usually used to process harder ore. The ore is placed in a cone-shaped shell and then the ore is crushed by a rotating cone.
Grinding equipment can use ball mills and rod mills. Ball mills are one of the commonly used equipment for lepidolite mineral processing and are used to grind ore into finer particles. Through the rotating cylinder, the ore is ground with the help of grinding media. A rod mill is similar to a ball mill and mainly grinds ores through long rod-shaped grinding rods.
Gravity separation is a commonly used physical separation method for lepidolite. It mainly uses the higher density of the lithium-containing minerals spodumene and lepidolite in the mineral. Gravity separation can be used to separate them from impurities with smaller density. After gravity separation, the lithium-rich concentrate can be collected from the bottom sediment. Commonly used gravity separation equipment include: shaker, jig and spiral chute.
The shaking table is a common gravity separation equipment that stratifies ores with different densities through a vibrating table. The heavier minerals in lepidolite move downward as the surface vibrates, while the lighter impurities remain above.
The jig mainly feeds ore into the equipment. The ore is stratified in the water in the equipment in a periodic shaking manner. The heavier minerals settle to the bottom, while the lighter gangue minerals remain on top.
The spiral chute mainly uses the principle of centrifugal force to separate the ore into different layers by rotating the spiral. Centrifugal force will push the heavier lepidolite minerals outward, thereby achieving separation.
Flotation mainly uses different properties and hydrophilicity differences of mineral surfaces to separate minerals. The ore is crushed and mixed with water to form a slurry, and then flotation agents are added to the slurry. These agents can change the properties of the mineral surface and make the minerals selectively adhere to the bubbles, thereby forming foam.
The flotation machine is the core equipment. When the slurry enters the equipment, the equipment injects bubbles into the slurry. The mineral particles interact with the bubbles, and the valuable lithium minerals adhere to the bubbles and rise accordingly. The model selection of flotation machine should be based on production requirements.
In the flotation process, flotation chemicals are essential. The main types of chemicals used in lepidolite are: activator, collector and frother. The activator mainly changes the surface properties of mineral particles, making them more susceptible to interaction and attachment by bubbles. Collecting agents generally adhere to the surface of mineral particles and are more likely to interact with bubbles. Foaming agents play an important role in the stability of bubbles.
Magnetic separation technology is another physical separation method for lepidolite. Since spodumene and lepidolite in lepidolite are non-magnetic minerals, magnetic separation technology can be used to remove iron impurities in the ore. During magnetic separation, the ore is fed into the magnetic separation equipment. The magnetic field in the equipment will attract the iron-containing impurities in the ore. These impurities follow the flow of the magnetic field and are collected in a specific area, while the lithium-containing minerals continue to move forward. delivery. Common magnetic separation equipment includes: dry magnetic separator, magnetic drum and permanent magnet drum magnetic separator. Selecting appropriate magnetic separation equipment based on ore characteristics and mineral processing technology can improve the grade and impurity removal efficiency of lithium concentrate.
The above are common lepidolite mineral processing technology and equipment. The specific equipment and technologies will vary according to the ore characteristics, production requirements and operation scale. Therefore, before selecting equipment and designing processes, conducting beneficiation tests and analysis on the ore, and then designing the lithium ore beneficiation process based on the needs can effectively improve the beneficiation efficiency, reduce production costs and improve economic benefits.