Cyclone and dewatering screen for fluorite tailings extraction sand

Date: Jun. 26, 2021

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Date: Jun. 26, 2021 Chat Line Send Inquiry

The coarse sand product obtained by the original sand extraction process of a certain fluorite tailings has high water content and is easy to be fine, which is not conducive to its transportation and reuse. Based on the analysis of the on-site sand extraction process from tailings, the cyclone-high frequency dewatering screen was used instead of the original spiral classifier in the sand extraction process.

After the fluorite tailings are deslimed and concentrated by a cyclone-high frequency dewatering screen, the yield of coarse sand on the screen is about 85%, and the moisture content is below 18%. Keywords: tailings sand extraction, cyclone, dewatering screen, dry discharge, tailings dry discharge is a new tailings disposal technology that has emerged in China in recent years. After the tailings slurry is concentrated, it is dehydrated by high-efficiency dehydration equipment to form a low-moisture, easy-to-sediment and solidify slag, which is then transferred to a suitable fixed location for dry storage or utilization.

The dry tailings discharge process can relieve the pressure on the storage capacity of the tailings pond, reduce the safety hazards of the tailings pond, realize the reuse of tailings, and promote the construction of a green and environmentally friendly mine system. Dry tailings discharge is mainly realized through thickening equipment, dewatering equipment, and conveying equipment.

Selection of equipment and conveying method

Determined according to the tailings quantity, slurry properties, density, particle size distribution and other parameters and on-site environmental conditions. As a kind of high-efficiency concentration equipment, the cyclone can separate the fine-grained materials in the tailings and concentrate the coarse-grained materials at the same time. The high-frequency linear vibrating screen re-dehydrates the concentrated product, and finally the moisture content of the product on the screen meets the requirements of the dry discharge process. Therefore, studying the application of cyclone-high frequency dewatering screen in dry tailings drainage process can provide technical reference for its popularization and application.

The combined use of cyclone and high-frequency linear vibrating dewatering screen has the characteristics of good dewatering effect, low moisture content of coarse sand, and low operating cost.
The high-frequency linear vibrating dewatering screen is suitable for materials desliming and dewatering, mud purification and other operations. According to different screening requirements, different screen surface inclination angles can be used. Designed with an upward inclination angle, a slurry pool can be formed at the feeding end, and its static pressure head helps the slurry to penetrate the screen; a dual-motor self-synchronizing vibrator is used, and the motor generates a linear vibration track through synchronous and reverse rotation to drive the product on the screen. Transportation, dehydration and discharge.

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