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Case Study of Cast Stone Composite Pipe Used for Tailing Transport at the Norilsk Copper-Nickel Mine in Russia
Norilsk, Russia, has selected cast‑stone composite pipes for its Tarnak copper–nickel mine tailings‑transport project, which spans a total length of 1,000 meters. The system handles the conveyance of copper–nickel mine tailings, processing up to 85,000 tons of raw ore per day, and stands as a benchmark for long‑distance hydraulic transport of highly alkaline, cold‑climate copper–nickel tailings in Siberia. Commissioned in 2016, the project has been operating reliably ever since, with no leaks, no wear‑related failures, and no maintenance issues, demonstrating stable and dependable performance.
The project’s tailings originate from a magmatic sulfide copper–nickel–platinum deposit, with a d₅₀ of 0.032 mm, 82% passing 200 mesh, and a true density of 2.82 t/m³. The gangue is dominated by high‑magnesium, flaky silicate minerals such as serpentine and talc. Total sulfur content is approximately 4.7%, the deep‑cone thickener operates at a solids concentration of 42%, and the slurry exhibits a pH of about 8.7, indicating strong alkalinity. The slurry also features a high yield stress, significant soap‑like mud erosion and abrasive wear, and is transported through an Arctic permafrost zone over a distance of 6.3 km, under extremely harsh operating conditions.
Cast stone composite pipes, with their outstanding structural stability and superior wear‑ and corrosion‑resistance, effectively withstand the corrosive erosion of strong alkaline environments and saponification‑induced mud‑flow abrasion. Even under conditions of high yield stress, highly concentrated slurries, and the extreme climates of Arctic permafrost regions, these pipes maintain stable conveying performance, demonstrating exceptional practicality and broad applicability across diverse operating conditions. Their successful deployment in this project fully validates their reliable performance in ultra‑large‑scale mining operations, in highly alkaline and frigid environments, and for long‑distance, heavy‑load tailings transport, providing a mature application benchmark for similar extreme service conditions worldwide.
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