中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 12 No. 3 June 2002 |
flows in hydraulic hoisting for ocean mining
（1. Department of Hydraulic Engineering, Tsinghua University,
Beijing 100084, China;
2. College of Mechanical and Electrical Engineering,
Central South University,Changsha 410083, China;
3. Changsha Research Institute of Mining and Metallurgy,
Changsha 410012, China）
Abstract:The particles of polymetallic nodules in hydraulic hoisting flows that are used for mining in deep sea are rather coarse, therefore their flow velocity is smaller than that of the surrounding water. The characteristic s of solid-liquid flows such as their density, concentration, elastic modulus a n d resistance were discussed. The wave propagation speed and the continuity and momentum equations of water hammer in coarse-grained solid-liquid flows were theoretically derived, and a water hammer model for such flows was developed.
Key words: hydraulic hoisting; coarse grain; water hammer; numerical model
