Staple Fiber Geotextile Filtration Project for Red Mud Tailings Pond

Aluminum Plant Red Mud Solid Waste Storage, Strong Alkaline Condition

1. Project Overview
This is a red mud tailings pond matched with an aluminum enterprise, with an annual storage of 6.19 million tons of alkaline red mud. The red mud slurry presents a strong alkaline environment with a pH value of 12~13, and the whole reservoir area adopts horizontal anti-seepage. The anti-seepage system consists of base bentonite waterproof blanket + 1.5mm HDPE geomembrane + 400g filament geotextile for surface protection, and the total consumption of geotextile is 380,000 square meters.

2. Application Parts of Geotextile
1）400g filament geotextile for full-coverage surface of the reservoir area: After red mud dewatering, covering soil for greening on the surface. The geotextile isolates planting soil from the anti-seepage membrane, preventing plant roots from piercing the membrane.
2）Filter drainage for drainage prism at dam toe: Lay 300g staple fiber geotextile on the inner side of the dam rockfill layer to form a filter layer, preventing fine red mud particles from entering the voids of the rockfill and blocking the drainage.
3）Package for leachate collection pipe network: Wrap the HDPE leachate pipe at the reservoir bottom with 300g geotextile to filter tailing impurities and protect the drainage pipe from blockage.

3. Application Effect
The corrosion resistance of geotextile meets the standard under strong alkaline working conditions. All leachate is collected and reused, with no exosmosis to pollute surrounding farmland.