Application and advantages of metallurgical tailings filter press

In the metallurgical industry, tailings treatment is a crucial component for efficient resource utilization and environmental protection. As a highly efficient solid-liquid separation device, the technical characteristics of the filter press play a key role in tailings treatment.

---Application Scenarios---

1. Tailings Dewatering and Dry Discharge: Filter presses can reduce the moisture content of tailings slurry by 15%-25%, forming a solid filter cake that meets dry discharge requirements, replacing traditional wet discharge methods and reducing the risk of tailings dam failure.

2. Metal Recovery:

For tailings containing valuable metals such as gold, copper, and zinc, filter presses achieve efficient solid-liquid separation. The filtrate can be reintroduced into the leaching process, increasing metal recovery by 5%-8%.

3. Wastewater Closed-Loop Recycling:

The treated filtrate has a suspended solids content of less than 50 mg/L and can be directly reused in the mineral processing process, saving over 70% of water and achieving zero discharge. 4. Hazardous Waste Pretreatment:

For toxic tailings containing arsenic and cyanide, filter pressing and dehydration are performed to reduce the risk of leachate contamination, complying with the "Hazardous Waste Landfill Pollution Control Standard" (GB 18598).

5. Preparation of Paste Filling Material:

The resulting filter cake is mixed with a cementitious material to form a paste for use in underground well filling. The filling strength can reach 3-5 MPa, and the resource utilization rate can reach 85%.

--Technical Advantages---

6. High-Efficiency High-Pressure Filtration:

Using 1.6-2.5 MPa ultra-high-pressure extrusion, it saves 40% more energy than traditional vacuum filters and has a processing capacity of 0.5-5 t/h·m², making it suitable for high-viscosity tailings.

7. Intelligent Control System:

Integrated PLC and HMI enable dynamic adjustment of over 20 parameters, including feed pressure and extrusion time, and achieves over 95% fault self-diagnosis accuracy. 8. Modular Design:

The filter plates can be made of polypropylene, rubber, or stainless steel. They are resistant to acids and alkalis (pH 2-13) and high temperatures up to 120°C, with a service life of 8 to 10 years.

9. Environmental Compliance:

The toxicity of tailings leachate 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 protection fiscal expenditures by over 30%.

10. Economic Optimization:

Dry-stack transportation costs are 50-80 yuan/ton lower than wet-stack, and the filter cloth loss rate is less than 0.3 kg.

11. Safety Redundancy Design:

The hydraulic system features dual overload protection, and the filter plate misalignment detection accuracy reaches 0.1 mm, eliminating the material spraying accidents common in traditional filter presses. 12. Process Adaptability:

Capable of processing fine-grained tailings with a particle size of <74mm.

Development Trends

With the implementation of the "Tailing Pollution Prevention and Control Management Measures," filter presses are evolving toward high pressure (above 3.0 MPa), intelligent processing (using AI algorithms to optimize the pressing curve), and large-scale production (over 1,500 units). A case study at a lead-zinc mine demonstrated that the use of a quick-opening filter press reduced tailings treatment costs from 25 yuan/ton to 12 yuan/ton, shortening the payback period to 1.8 years, demonstrating its technical and economic value.

Through technological innovation, filter presses are continuously driving the metallurgical industry's transformation toward sustainability and resource utilization, becoming key equipment in achieving the goal of "waste-free mines."