The Present Situation and Development Trends of the Mining and Separation Technologies of Weathering Crust Lon-Absorbed Type Rare-earth Ores

This paper describes the technical status of weathering crust ion -absorbed type rare -earth ores, and analyzes the main features of these various extraction techniques. The future development directions are put forward from the aspects of basic research of Situ leaching, the research and development of a new precipitating agent, impurity purification technology in accordance with the problems existed in the current exaction process.