Metallurgical tailings industry Application & advantages of Filter press

In the metallurgical industry, tailings treatment is the core link of efficient resource utilization and environmental protection. As a high-efficiency solid-liquid separation equipment, filter press plays a key role in tailings treatment with its technical characteristics.

一、The following analyzes its application scenarios and advantages from multiple dimensions:

I. Application scenarios
1. Tailings dehydration and dry stacking: The filter press can reduce the moisture content of tailings slurry to 15%-25%, forming a solid filter cake, meeting the dry stacking requirements, replacing the traditional wet discharge method, and reducing the risk of tailings dam breach.

2. Metal component recovery:
For tailings containing valuable metals such as gold, copper, and zinc, the filter press achieves efficient solid-liquid separation, and the filtrate can be returned to the leaching process, increasing the metal recovery rate by 5%-8%.

3. Wastewater closed-loop circulation:
The suspended solids content of the treated filtrate is less than 50mg/L, which can be directly reused in the mineral processing process, with a water saving rate of more than 70%, and a zero-emission system.

4. Hazardous waste pretreatment:
For toxic tailings containing arsenic and cyanide, the risk of leachate pollution is reduced after dehydration by the filter press, which complies with the "Hazardous Waste Landfill Pollution Control Standard" (GB 18598).

5. Paste filling preparation:
The output filter cake is mixed with the cementing material to form a paste, which is used for filling the underground goaf. The filling strength can reach 3-5MPa, and the resource utilization rate is increased to 85%.

二、Technical advantages

6. High-pressure filtration efficiency:
Using 1.6-2.5MPa ultra-high pressure extrusion, it saves 40% energy compared with traditional vacuum filters, and the processing capacity reaches 0.5-5t/h·m², which is suitable for high-viscosity tailings.

7. Intelligent control system:
Integrate PLC and HMI human-machine interface to realize dynamic adjustment of 20+ parameters such as feed pressure and extrusion time, and the accuracy rate of fault self-diagnosis exceeds 95%.

8. Modular design:
The filter plate material can be polypropylene, rubber or stainless steel, acid and alkali resistant (pH 2-13), temperature resistant (120℃), and has a service life of 8-10 years.

9. Environmental compliance:
The toxicity of tailings leaching is reduced by 60% after dehydration, meeting the requirements of the "14th Five-Year Plan for Comprehensive Prevention and Control of Heavy Metal Pollution", and reducing environmental tax expenditure by more than 30%.

10. Economic optimization:
The transportation cost of dry pile is 50-80 yuan/ton lower than that of wet pile, the filter cloth loss rate is<0.3kg>

11. Safety redundancy design:
The hydraulic system is equipped with double overload protection, and the filter plate misalignment detection accuracy is 0.1mm, which eliminates the spraying accidents of traditional filter presses.

12. Process adaptability:
It can process fine-grained tailings with a particle size of<74μm, 90="" accounting="" for="">

三、Development trend

With the implementation of the "Tailing Pollution Prevention and Control Management Measures", filter presses are developing towards high pressure (3.0MPa+), intelligence (AI algorithm optimizes the pressing curve) and large-scale (1500 models and above). The application case of a lead-zinc mine shows that after using a fast-opening filter press, the cost of tailings treatment is reduced from 25 yuan/ton to 12 yuan/ton, and the investment recovery period is shortened to 1.8 years, demonstrating its technical and economic value.

Through technological innovation, filter presses continue to promote the transformation of the metallurgical industry towards greening and resource utilization, and have become the core equipment for achieving the goal of "waste-free mines".