Method for leaching separation of mixed rare earth concentrate

A method for leaching separation of a mixed rare earth concentrate, comprising:

• performing a surface modification on the mixed rare earth concentrate under an action of a plasma gas flow to obtain a surface-modified mixed rare earth concentrate;
• performing a mineral phase transformation on the surface-modified mixed rare earth concentrate to transform a bastnaesite phase in the mixed rare earth concentrate into cerium oxyfluoride and obtain a mineral phase transformation product containing the cerium oxyfluoride;
• acid leaching the mineral phase transformation product to obtain an acid leachate and an acid leaching residue, wherein the acid leachate comprises a rare earth ion and a fluoride ion, and the acid leaching residue comprises monazite;
• performing a surface modification on the acid leaching residue under an action of a plasma gas flow to obtain a surface-modified acid leaching residue;
• and
• alkaline leaching the surface-modified acid leaching residue to obtain an alkaline leachate and an alkaline leaching residue, wherein the alkaline leachate comprises a phosphorus element, and the alkaline leaching residue comprises a rare earth element.