【英文摘要】Using the first principle calculation based on density function theory, the band structure, the density of states and the population probabilities of goethite unit cell were studied. The thermodynamics and kinetics of the system of nickel laterite leached in microwave field were drawed out from the researches of the heat balance of microwave heating system, the directly leaching behaviors in microwave field and the process of roasting in microwave field - leaching. In microwave field, the phase transformation, the leaching behaviors and the effects of process parameters were carefully investigated using advanced analysis techniques, including Atomic Absorption Spectrum, X-Ray Diffraction, Mossbauer Spectroscopy, Scanning Electron Microscope and Electron Spectrum. According the research results, the high efficient and environmental processes for nickel laterite treatment were presented, which included microwave assisted roasting - moderate pressure leaching and microwave assisted roasting- leaching at atmospheric pressure / iron removal by goethite precipitate. The research results (fourteen papers) have been published in related journals, such as Hydrometallurgy, Transactions of Nonferrous Metals Society of China. Four national patents have been applied and three of them have been authorized. Under the support of the project, seven postgraduate students are trained; we attended academic conferences for six times and invited Professor Phillip Mackey, the chief extractive metallurgy scientist of Xstrata Plc, Canada, to give a lecture in our school.