Abstract
Deep-sea cobalt crusts water jet cutting method is proposed to avoid cutter impact load. With simulation calculations and experimental tests, water jet system parameters and its cutting ability were studied. Simula-tion results show that working pressure, ejection range and ejection angle of water jet system are main parameters of its cutting ability. Its important degree is in turn the working pressure, ejection range and ejection angle. Increasing water jet system working pressure is the most effective way to improve its cutting ability. When water jet working pressure is constant, in order to improve its cutting ability, the ejection range should be less than 4mm (four times of nozzle diameter) and the ejection angle should be about 13o. Experimental results show that there is a threshold pressure during water jet cutting cobalt crusts simulation material. With the increase of water jet working pressure, its cutting ability increases dramatically. With the increasing of water jet ejection range, its cutting ability decreases sharply. The optimal ejection angle is about 13o</sup.
Highlights
As land mineral resources are being exhausted, many countries are paying attention to deep-sea resources development and utilization
Simulation results show that working pressure, ejection range and ejection angle of water jet system are main parameters of its cutting ability
Its important degree is in turn the working pressure, ejection range and ejection angle
Summary
As land mineral resources are being exhausted, many countries are paying attention to deep-sea resources development and utilization. One research direction is about cobalt crusts resources cutting method [2,3,4]. Spiral drum cut teeth cutting is seen as an effective cobalt crusts cutting method. In order to improve cutting efficiency, cobalt crusts vibration cutting method is proposed in reference [5], an eccentric mechanism is amounted in spiral drum. In a real deep-sea cobalt crusts mining system, high cutting efficiency is important, but safety of mining system is more important. Impact load and vibration of spiral drum are inevitable when cutter cutting deep-sea cobalt crusts. Sea cobalt crusts water jet cutting method is proposed in this paper to decrease impact load of cutter
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