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A method for combining cyclones for tailings dry discharge

A cyclone and secondary cyclone technology, applied in chemical instruments and methods, wet separation, recycling technology, etc., can solve the problem that the yield of sedimentation can only reach about 75%.

Active Publication Date: 2018-04-06
YANTAI XINHAI MINING MACHINERY
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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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  • A method for combining cyclones for tailings dry discharge

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Embodiment Construction

[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0021] Such as figure 1 As shown, for the copper tailings of a mining company, the dry tailings volume is 5 tons / hour, the slurry concentration is 15%, the slurry concentration is the mass fraction of solids in the entire slurry, and the copper tailings particle size is greater than 325 mesh The content accounts for 95% of the whole tailings slurry. The copper tailings are dry-discharged by using a cyclone combination method, and the specific steps are as follows:

[0022] 1) Transport the copper tailings slurry to the primary cyclone. The model of the primary cyclone is XCⅡ200×3 (1 group). The copper tailings slurry is divided into underflow and overflow in the primary cyclone. The underflow is a coarse particle ...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B9/06B03B7/00
CPCB03B7/00B03B9/06Y02W30/52
Inventor 王有春常乃珲吴国富张云龙
Owner YANTAI XINHAI MINING MACHINERY
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