Wet-process dry stacking method of wet-process mineral separation tailing pond

Abstract

The invention discloses a wet-process dry stacking method of a wet-process mineral separation tailing pond. Dehydration water repellent agents are added in the waste ore slurry discharging process, waste ore slurry and the dehydration water repellent agents are fully mixed and react in a pipeline through a turbulence function, and slurry and water are fast separated when discharging is carried out at a discharge opening. The wet-process dry stacking method is good in solid-liquid separation effect, and the solid content of instantaneous slurry is more than 40%; natural storage is carried out for about seven days, the solid content reaches 60%, even more than 75%, the slurry with the low water content is naturally stacked or pre-cultivated, or metal in slurry with the low water content is re-screened, and separated clear water can be recycled or directly discharged. The wet-process dry stacking method is simple in process, low in labor intensity, large in treatment capacity and less in improvement investment, the original tailing pond does not need to be greatly changed, expensive dehydration equipment does not need to be added, proper equipment dissolving the dehydration water repellent agents only needs to be added, economic benefits and social benefits are obvious, popularization and using are easy, and the mode of an existing storage tailing pond directly discharging waste ore slurry, plate-frame pressure filtration and other solid-liquid separation processes can be replaced.

Description

technical field [0001] The invention belongs to the technical field of wet-process mineral processing tailings storage, and in particular relates to a wet-process dry stacking method for wet-process mineral processing tailings storage. Background technique [0002] Wet mineral processing (mineral washing) produces a large amount of waste water and waste mud (mine) slurry. There are two ways to store waste slurry at present: [0003] 1. Inline [0004] At present, the vast majority of my country's wet mineral processing (mineral washing) still uses tailings stockpiles to store the waste water and discarded mud (mineral) slurry generated by wet mineral processing (mineral washing). The task and main function of the tailings pond is to permanently store the Process wastewater, waste mud (mine) pulp, so it is a key link in the treatment of tailings in mining production. The advantage of this method is that it is simple, however, there are many problems in this process [0005]...

AI Technical Summary

Problems solved by technology

[0005] (1) The cost is high, the larger the processing capacity, the cost will increase geometrically

[0006] (2) Huge potential safety hazards and high later maintenance costs

Because the amount of waste water is large, the water content of mud (mine) slurry is very high (generally 70%), which may cause underground river pollution due to changes or destruction of underground geological conditions, or the underground river will cause waste water and waste mines in tailings ponds. Large-scale overflow of mud causes large-scale pollution; what is even more frightening is heavy rain, earthquakes and other major disasters, which will cause safety accidents such as tailings dam collapse and a large amount of ore mud gushing out; even when the warehouse is closed, safety hazards still exist for a long time

[0007] (3) The site selection of the new tailings pond is difficult, because the tailings pond needs to occupy a large area of ​​land resources, and the geological conditions are very strict, and it needs to be far away from villages, etc.

[0008] (4) The life of the tailings pond is short, because the water content of the ore slurry is very large, and the storage capacity of the tailings pond will be exhausted soon

[0009] (5) Water cannot be reused

The disadvantages are small processing capacity and poor continuity; high labor intensity; need to add expensive equipment; high post-maintenance costs

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