Studies on the effects of vessel nozzle parameters on the ore transportation efficiency in deep-sea mining

As it is difficult to control the ore volume concentration of pump-vessel combined ore transporting equipment for deep-sea mining during the ore pulp conveying process and it can't remain continuous, stable and reliable in the process, the SIMPLE algorithm is adopted to calculate and analyze the rules of the vessel nozzle parameters effects on the ore transportation concentration and conveying efficiency based on the Euler-Euler model and standard κ-ϵ turbulence model, and the conclusion is experimentally verified that ore transportation volume concentrations can be controlled and adjusted by controlling vessel nozzle parameters. Simulation results are drawn as follows: with the vessel nozzle diameter bigger, the ore transportation volume concentration becomes bigger and the water jet impacting force on ores becomes weaker so that the transporting process gets more stable. With the nozzle outlet height from the vessel bottom greater, the ore transportation volume concentration also becomes bigger, but the transporting process gets less stable. When the nozzle outlet height from the vessel bottom equals to 800 millimeters or 900 millimeters, it can ensure that the ore transportation volume concentration get bigger and the transporting process gets stable simultaneously. © 2022 Union of Chambers of Engineers and Architects of Turkey. All rights reserved.