Spiral Roller Crushing Head Cutting Cobalt-rich Crusts Process Simulation And Load Volatility

Cobalt-rich crust, which grows in the smooth slope of seamount ranged from 800 to 3000 m, is one of the most attractive mineral resources in the deep-sea bed. Its average thickness is only 4 to 6 centimeters, and is rich in strategic resources such as cobalt, platinum, nickel, manganese, copper, iron, phosphorus, titanium, zinc, lead and cerium etc. Because of its practically strategic, economic and political significance, cobalt-rich crust has become a great concern in ocean resource exploitation for every country.The first problem of mining cobalt-rich crust is how to crush the thin layer of cobalt crust from the fluctuant surface of bedrock, and guarantee that the mining head can steadily work for the long haul. It is necessary to ascertain the distribution range of maximum load of the mining head and its cutting tooth, and conclude the law of work parameters how to influence load fluctuation of the mining head by the mean of experiment. Because of the difference of seabed tiny terrain and the complexity of ocean mining environment, it is difficult to do so expensive ocean experiment.Based on methods of kinematic analysis, load analysis, and experiment, the mathematical model of working load of the mining head has been established; based on midpoint displacement typified directivity, seabed tiny terrain has been realized by generating and reconstruction, then, the program of simulating cutting process of mining head has been developed. Based on simulation program, two hundreds data simulating seabed tiny terrains are generated, and terrains are regarded as a sample of random seabed tiny terrain. The simulating experiment of the mining head cutting process is conducted based on the sample terrain. Through simulating experiment, the distribution range of the maximum load of the mining head and its cutting tooth are concluded, which provide theoretic reference for the design of mining head, its cutting tooth, and its coupling parts; influencing factors of load fluctuation of the mining head, such as work parameters, have been studied, and the law of each work parameters how to influence load fluctuation has been concluded, which provides theoretical reference for reducing load fluctuation of mining head. In a word, the research outcome has a theoretical and practical significance to design the equipment of mining cobalt-rich crust.