Yingqian Lead-Zinc Mine Tailings Water Treatment System Project

Project Background:

The Yingqian lead-zinc mine in Jiangxi Province, China, faces challenges in treating tailings wastewater due to its proximity to a sensitive ecological area. The current practice involves natural settling in a tailings pond, followed by partial recycling and partial discharge of the supernatant water. However, this method fails to meet the stringent discharge standards (GB25466-2010) for lead and zinc pollutants, especially critical due to the mine's location near the Ganjiang Source Nature Reserve.

Challenges:

1. Large volume of wastewater
2. Complex composition of wastewater
3. Difficulty in treatment
4. High concentration of suspended solids
5. Excessive levels of heavy metals (lead, zinc)
6. High pH value in the supernatant water

Solution:

Beijing Huade Ventures implemented the HDCY integrated multi-effect clarification system to address these challenges. This innovative system offers several key advantages:

• Modular Design: The system consists of various modules, including coagulation reaction tanks, flocculation reaction tanks, pre-sedimentation areas, inclined tube separation areas, and medium recovery areas. This modular approach allows for customization based on specific treatment needs.
• Multi-Technology Integration: The system combines various water treatment technologies, including chemical coagulation, mechanical stirring, loading sedimentation, and inclined tube separation. This comprehensive approach ensures efficient removal of suspended solids, heavy metals, and other pollutants.
• Optimized Sedimentation: The system utilizes media and sludge return measures to improve sedimentation efficiency and achieve high-quality effluent.

Project Outcomes:

1. The HDCY system successfully treats 5,000 cubic meters per day (m³/d) of tailings water.
2. The treated effluent meets the discharge standards for lead, zinc, copper, cadmium, and chromium as per GB25466-2010.
3. Suspended solids concentration in the effluent is less than 20 ppm.
4. The entire treatment process adheres to the company's environmental assessment standards.
5. The operating cost is low, at only 0.23 yuan/ton.

System Features:

• Applicable Industries: Mine water, mineral processing wastewater, steel/metallurgical wastewater, desulfurization wastewater, municipal sewage, etc.
• Core Components: Coagulation reaction tank, flocculation reaction tank, etc. (all covered by a one-year warranty)
• Product Size: Customized based on processing volume
• Motor Power: Varies depending on equipment size
• Productivity: 30,000 tons per day (T/d)
• Weight: Dependent on equipment size
• Warranty Period: One year after equipment acceptance

Benefits:

• High Efficiency: The system effectively removes pollutants, achieving compliance with discharge regulations.
• Large Processing Capacity: A single unit can handle a large volume of wastewater with a short residence time of only 8 minutes.
• Low Investment: The modular design minimizes civil construction needs, reducing project costs.
• Low Operating Costs: The system utilizes cost-effective technology, ensuring low operational expenses.