Rare Earth Minerals: The "Vitamins" of Modern Industry

Rare earth minerals do not refer to single minerals, but rather to mineral aggregates containing rare earth elements (REEs). These 17 elements include scandium, yttrium, and 15 lanthanides. Due to their unique electronic structure, they exhibit excellent magnetic, optical, and electrical physicochemical properties, earning them the title of "vitamins of modern industry."

In terms of their occurrence, rare earths exist in the Earth's crust primarily in three forms: as independent minerals (such as bastnaesite and monazite), as isomorphous substitutions within the crystal lattices of other minerals, and as ion-adsorbed minerals in clay minerals. Among these, ion-adsorbed rare earth minerals occupy an important position in modern industry due to their ease of extraction.

Global rare earth resources are concentrated, with China accounting for approximately 40% of global reserves and over 68% of production, making it the world's largest rare earth producer. The main mining methods depend on the deposit type, including open-pit mining and underground mining. Extraction processes are complex and sophisticated, typically involving four core stages: mining, beneficiation, smelting, and separation. Mineral processing often employs a combination of flotation and magnetic separation; while separation and purification primarily rely on solvent extraction technology to obtain high-purity single rare earth oxides.

Rare earth applications span seven major sectors, from new energy and electronics to defense and military industries. Particularly in the fields of new energy vehicles and wind power generation, high-performance neodymium iron boron permanent magnet materials are the core of motors; while in the electronics industry, rare earths are key raw materials for manufacturing LED display phosphors and laser crystals.

Given its strategic value, China has implemented the "Rare Earth Management Regulations," aiming to protect the development of this valuable resource and guide the industry towards green mining and high value-added upgrades, ensuring the sustainable development of the rare earth industry.