fluorite beneficiation method and plant

Fluorspar, also known as fluorite, is an essential mineral for metallurgy, chemical, glass, ceramic industry. Raw fluorspar ores normally are associated with gangues like quartz and calcite, which make it impossible to use directly for industrial production. Fluorspar beneficiation process is required.

Fluorspar beneficiation methods

There are three methods in total. Before modern beneficiation plant is utilized, original method is manual hand-pick. Fluorspar lumps are picked up from gangues by the difference in color and shape. This method is low in efficiency and can’t produce in large scale, but it is still a good roughing process for big fluorspar lumps.

The second simple and effective method is gravity concentration, which is a separation process based on the difference in density between valuable minerals and gangues. Although the density difference is not big between fluorspar and gangue, it is no longer a problem for modern gravity concentration equipment. Gravity concentration is becoming popular in fluorspar beneficiation.

The third method is flotation process. This method has disadvantages of big investment, high production cost, low efficiency, pollution to environment, but it is the only way to produce high grade fluorspar concentrate.

Fluorspar beneficiation process

For fluorspar beneficiation, the most suitable process is to use the above methods in combination. Hand pick——Gravity concentration——Flotation.

Raw ore is fed onto belt conveyor after primary crushing and washing. Labors pick up big lumps, which are used for metallurgy purpose. Middlings are sent to secondary crushing. Crushed fluorspar is screened into different fractions for gravity concentration. Concentration from gravity separation by jigging process can be used for metallurgy industry. Tailings from gravity separation are enriched by flotation process to get high grade concentrate powders, which is used for chemical industry. This combined process is suitable for most of the fluorspar deposits.

Fluorspar beneficiation plant

1.For manual pickup, the equipment is horizontal belt conveyor with adjustable speed. Labors sort lumps from conveyor.

2.Gravity concentration equipment includes jig, crusher, sand washer, vibration screen, dewatering screen, etc. The equipment is selected according to the embedded size and slime content.

3.Flotation equipment includes crusher, ball mill, classifier, flotation machine, thickener, filter press, etc.

Summary

The simplest and most effective beneficiation method is gravity separation. It is major process to get fluorspar concentrate for metallurgy industry. Compared with flotation process, gravity concentration is becoming popular. The process is crushing, screening, jigging, dewatering. Fluorspar ore is big, double crushing process is necessary before screening. Fluorspar is fragile, jaw crusher is good enough for it. Crushed ore is classified into 0-8mm, 8-30mm, 30-50mm fractions by vibration screen. Different jigs are used for different fractions. Concentration and tailings from jigging separation contains huge water, linear vibration screen is used for dewatering process.

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