Cationic activity of leaching agent and leaching characteristics are two important factors affecting the leaching rate of ion-type rare earth. In order to study the correlation between them, a column leaching experimental device was developed independently and the relationships between the evolution of micro-pore structure leaching rate, leaching amount of rare earth and leaching times were obtained by combining nuclear magnetic resonance technology. Comprehensive analysis showed that the cationic activity of leaching agent was not closely related to the micro-pore structure and leaching rate of soil samples. The pore structure of samples was mainly determined by the initial pore, and the leaching rate was determined by the pore structure and the aggregation degree of particle migration. Cationic activity of leaching agent was an important but not the only factor affecting the quality of rare earth leaching. The concentration of leaching agent affected the leaching efficiency to a certain extent.
Mining Research and Development
Ion-type rare earth ore
Nuclear magnetic resonance