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Case Study on the Application of Cast Stone Composite Pipes for Transporting Iron Ore Concentrate at Maanshan Iron & Steel Co., Ltd.
In the concentrate‑transportation project at Masteel’s Gushan, Nanshan, and Zhongjiu iron ore mines, cast‑stone composite pipes were used throughout the entire pipeline system for tailings conveyance, with two parallel lines laid totaling 4,800 meters in length. Taking the Zhongjiu iron ore mine as a representative application scenario, the project employs a high‑pressure diaphragm pump–based conveying mode, achieving an effective transport distance of 4.3 km and a hydraulic gradient of 9.8‰. This project serves as a benchmark for long‑distance pipeline transport of high‑concentration magnetite concentrates in Eastern China, demonstrating stable and reliable overall operation.
The project transports a high-grade magnetite concentrate with an Fe grade as high as 65.00%. The tailings have a d₅₀ of 0.042 mm, with 63% passing through a 200-mesh sieve. The gangue is primarily composed of quartz and magnetite. The slurry is conveyed at a concentration of up to 60%, under neutral to mildly alkaline operating conditions. Overall, the wear is dominated by medium‑sized particles, placing stringent demands on the pipeline’s wear resistance over long‑term operation. Cast‑stone composite pipes are specially optimized for the high‑concentration, high‑velocity erosion conditions typical of such concentrates, offering excellent resistance to erosive wear and effectively mitigating continuous particle abrasion.
In long-term, high-concentration, continuous concentrate‑transport operations, cast‑stone composite pipes exhibit structural stability, excellent resistance to erosion, and no abnormal wear, making them ideally suited to the demanding conditions of high‑pressure, long‑distance conveyance of iron ore concentrates. With their reliable performance and superior adaptability to operating conditions, these pipes demonstrate exceptional practicality and versatility, offering a mature and dependable solution for domestic steelmakers seeking efficient, long‑distance, high‑concentration pipeline transport of iron ore concentrates.
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