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The selection of spodumene beneficiation equipment should be based on its beneficiation process. Currently, commonly used processes include: manual separation, pre-desliming, flotation, heavy medium separation, magnetic separation and combined beneficiation. Several methods.
Before officially entering the selection, spodumene is generally hand-selected for preliminary screening and pre-selection. After crushing (the width of the ore particles ≤1200mm), the ore is sent to the hand selection belt, and 25~300mm spodumene is selected based on the appearance color and glossiness.
Spodumene hand selection equipment includes: crusher, belt conveyor, screening machine
Crusher: Hammer Crusher Made Coarse crushing, jaw crusher for medium crushing, cone crusher for fine crushing
Screening machine:There are three types of vibrating screen, linear vibrating screen and self-centering vibrating screen. Selection, the specific equipment needs to be determined according to the screening particle size requirements
The preliminarily desliming operation is mainly carried out before sorting. A desliming and impurity removal operation is carried out. The crushed and hand-selected minerals are ground in a ball mill until they are -0.074mm, accounting for 75%. Then dodecylamine or cocoamine is used as the gangue mineral collector and is removed by flotation. Mineral slime and mica.
Spodumene pre-selection desliming equipment mainly includes: dry ball mill, overflow ball mill, coarse particle flotation machine, chemical mixing tank
Dry ball mill: It is generally used in the grinding stage for dry processing. After grinding the minerals to a certain requirement, it enters the pre-selection stage to remove some impurities;
< strong>Wet ball mill:In the grinding stage, it is generally used for fine grinding. After grinding to meet the particle size requirements, it enters the separation operation;
Coarse particle flotation machine/stirring tank: It is an equipment used for roughing and pre-selection after the dry ball mill. The grinding product is sent to the chemical mixing tank to fully mix the minerals and chemicals, and then flotation removes impurities such as slime or mica.
There are two methods of spodumene flotation: forward flotation and reverse flotation. Among them, positive flotation adds oleic acid and its soap salts as collectors in a strong alkaline environment to directly float out spodumene. Reverse flotation is to first use lime to create an alkaline environment, then add dextrin, starch, etc. to suppress spodumene and float out silicate gangue ores.
Spodumene flotation equipment mainly includes: XCF flotation machine, KYF flotation machine, SF flotation machine and JJF flotation machine
XCF/KYF type:The two machines can generally be combined into several groups. The former is used as a straight chute and the latter is a slurry suction tank, which is mostly used for sweeping and selection operations;
JJF type/SF type:Can be used in combination. SF is used as the suction tank and JJF is used as the straight chute. It is suitable for sweeping and beneficiation operations in medium and large lithium ore concentrators.
For spodumene with finer particle size, the heavy medium separation method can be used. According to the density difference between the minerals, use The pressure of 0.05~0.20Mpa is fed into the heavy medium cyclone for sorting, in which the bottom flow part is spodumene.
The main equipment used in the heavy medium separation method is: heavy medium cyclone
When spodumene contains When iron impurity minerals are removed, magnetic separation is required for iron removal. Since most of the associated iron impurities in spodumene are weakly magnetic, it is necessary to remove iron through strong magnetic (above 10,000Oe) magnetic separation equipment to obtain spodumene concentrate with low iron content.
Spodumene magnetic separation equipment includes: wet strong magnetic separator, high gradient magnetic separator
When the above single mineral processing method When higher-grade spodumene concentrate cannot be obtained, a combined beneficiation method must be used for effective separation. Common combined processes include: flotation-magnetic separation combined process, flotation-gravity separation-magnetic separation combined process, flotation -Chemical treatment combined process, etc.
Spodumene combined mineral processing equipment includes: flotation machine, magnetic separator, jig, shaker, spiral chute and leaching tank, etc.
The above content is only for reference, because the mineralization conditions and ore properties of each spodumene are different, so The required mineral processing methods and lithium extraction equipment are also different. It is recommended to design a reasonable spodumene beneficiation process plan and a complete set of mineral processing lithium extraction equipment through mineral processing test analysis.
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