Pump-lockage ore transportation system for deep sea flexible mining system

Abstract

Based on characteristics of deep sea flexible mining system, a new pump-lockage ore transportation system was designed. According to Bernoulli equation and two-phase hydrodynamics theory, parameters of the new system were obtained and four ore transportation systems were analyzed. The results indicate that the pump head of 1 000 m mining system is 100–150 m and that of 5 000 m mining system is 660–750 m. In addition, based on similarity theory, a model of the new transportation system was made, which can simulate more than 5 000 m actual ore transportation system. So both theory and experiment prove that the new pump-lockage ore transportation system is an ideal design for deep sea flexible mining system.

Keywords

flexible mining system / ore transportation system / pump-lockage

References

[1] CHUNG J S, CHENG B. Application of thrusts to elastic joints on long vertical pipe in 3-D nonlinear motions (Part II): Numerical examples by MSE and FEM results [C]// Proc 8th Int Offshore and Polar Eng Conf. Montactual: ISOPE, 1998: 189–198.

[2] CHUNG J S, CHENG B. 3-D responses of vertical pipe bottom pin-joined to a horizontal pipe to ship motion and thrust on pipe (Part I): MSE and FEM modeling [C]// Proc 9th Int Offshore and Polar Eng Conf. Brest: ISOPE, 1999: 265–271.

[3] ChungJ. S., ChengB.. MSE and FEM modeling of thrusts to elastic joints of long vertical pipe in 3-D nonlinear motions [J]. Int J Offshore and Polar Eng, 1999, 9(2): 117-125

[4] YuH.-y., LiuS.-jun.. Dynamics of vertical pipe in deep-ocean mining system [J]. Journal of Central South University of Technology, 2007, 14(4): 552-556

[5] HuangZ.-h., LiuS.-j., XieYa.. Obstacle performance of cobalt-enriching crust wheeled mining vehicle [J]. Journal of Central South University of Technology, 2006, 13(2): 180-183

[6] XiangL.-jing.Research on kinematics and dynamics of deep sea mining pipe [D], 2000, Beijing, University of Science and Technology Beijing: 1-10

[7] GrebeH.Amathematical model for the analysis of flexible marine risers [D], 1997, Siegen, Siegen Univeristy: 1-12

[8] AblowC. M., SchechterS.. Numerical simulation of undersea cable dynaimcs [J]. Ocean Engineering, 1983, 10(6): 443-457

[9] MilinazzoF., WilkieM., LatchmanS. A.. An efficient algorithm for simulating the dynamics of towed cable systems [J]. Ocean Engineering, 1987, 14(6): 513-526

[10] OwenD. G., QinK.. Model tests and analysis of flexible riser systems [J]. Offshore Mechanics and Arctic Engineering, 1986, 3: 354-362

[11] GhadimiR.. A simple and efficient algorithm for the static and dynamics analysis of flexible marine riser [J]. Computers & Structures, 1988, 29(4): 541-555

[12] ENGLMANN H E. Vertical hydraulic transportation of large-size—A contribution to marine mining. OCT 3137 [C]// The 10th Annual Offshore Technology Conference. Louisiana: 1978: 216–219.

[13] SmithP. A., StansbyP. K.. Postcritical flow around a circular cylinder by the vortex method [J]. Journal of Fluid and Structures, 1989, 3: 275-291

[14] FeiX.-jun.Transporting hydraulics of hydromass and pellet [M], 1994, Beijing, Tsinghua University Press

[15] XU Hai-liang, HE Qing-hua. Deep sea mining ore expulsion system: China, 20004200360 74.2 [P]. 2004. (in Chinese)

[16] XuH.-l., HeQ.-hua.. Deep sea mining system research [J]. Chinese Mining Industry, 2004, 3(7): 43-46

[17] XuH.-l., HeQ.-hua.. Research on combined single pump and ore tank deep-sea mining transporting system [J]. Journal of Central South University of Technology, 2005, 36(1): 92-96