A method for combining cyclones for tailings dry discharge

Abstract

The invention relates to a tailings dry-type deslagging method employing swirlers in combination. The method includes steps of conveying tailings paste into a first-stage swirler, wherein the tailings paste is divided into bottom flow and overflow flow in the first-stage swirler; when the concentration of the bottom flow paste reaches 25% to 35%, conveying the bottom flow of the first-stage swirler to a second-stage swirler, wherein the bottom flow of the second-stage swirler is high concentration paste with a solid content of 65%; enabling the bottom flow of the second swirler to enter a dewatering sieve for further dewatering and conveying the overflow flow of the second-stage swirler into a third-stage swirler; conveying the bottom flow of the third-stage swirler to the first-stage swirler again and repeating the operation for 1 to 2 times. Finally, the dry mine amount in the bottom flows of the second-stage swirler and the third-stage swirler accounts for 95% of the initial dry mine amount and the dry mine amount in the overflow flows of the swirlers accounts for 5% of the initial mine amount. The method has beneficial effects that the swirler sinking sand yield is high, the dewatering efficiency is high and the floor occupancy is saved.

Description

technical field [0001] The invention relates to a method for treating tailings, in particular to a method for combining cyclones for tailings dry discharge. Background technique [0002] In recent years, there have been some major safety issues in tailings ponds in the mining industry. According to the requirements, the newly constructed tailings ponds must be designed as an independent project, and various procedures such as environmental impact assessment and safety production assessment must be handled. Tailings dry discharge has the advantages of reducing the investment in tailings ponds, reducing the trouble of various approval procedures and operational risks, so it has developed rapidly in recent years. [0003] The current tailings dry discharge method is to first transport the slurry to the cyclone, the slurry is concentrated from the sand outlet of the cyclone and then enters the dewatering screen, and the overflow of the cyclone enters the thickener, other dehydra...

AI Technical Summary

Problems solved by technology

Most of the current tailings dry discharge methods use a first-stage cyclone. When the feed concentration is about 20%, and the material with a particle size greater than 200 meshes accounts for 80% of the entire tailings slurry, the sedimentation yield of the cyclone is only Can reach about 75%

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