Application of Thickeners in the Mining and Mineral Processing Industry
Sep 18,2025
Concentrate Dewatering:
To dewater low-density concentrate slurries (typically with a moisture content exceeding 80%) produced from flotation or other beneficiation methods into high-density slurries (typically with a moisture content of 30–50%), preparing them for subsequent filtration, drying, and smelting processes. Examples include copper concentrate, iron concentrate, and gold concentrate.
Tailings Management:
To thicken discarded tailings slurries after mineral processing, enabling efficient water recovery (overflow water is recycled, conserving water resources) and dry stacking (high-density underflow is transported to tailings storage facilities, enhancing safety and reducing environmental pollution).
High Throughput:
Especially in tailings thickening applications, thickeners are often required to handle the entire processing capacity of the plant, resulting in massive scales (with diameters exceeding 100 meters).
Abrasion Resistance:
The solid particles in slurries are typically hard and sharply angular, demanding extremely high abrasion resistance in the feed system, rake arms, rake teeth, and underflow pumps. This is achieved using ultra-high-molecular-weight polyethylene (UHMWPE) plates, specialized wear-resistant steel, or ceramic linings.
High Compressibility:
Powerful rake drive systems (with high torque) are essential to overcome the high friction forces exerted by solid particles in the compression zone, preventing "rake bogging" incidents.
Flocculant Addition and Mixing:
Modern high-efficiency thickeners heavily rely on flocculants to accelerate the settling of fine particles. This requires professional flocculant preparation and dosing systems, along with efficient and gentle mixing with the slurry within the feed well.
Automated Control:
Automated control of underflow pump frequency and flocculant dosage is necessary, based on sensors such as underflow density meters, mud bed level detectors, and torque monitors, to ensure stable operation.
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