Patent ID: 11873541
Assignee: JIANGXI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  G  Y | IPC C  G

Claim 2:
3. The method for determining the source sink term in the ionic type rare earth ore leaching process according to claim 1, wherein the method of the step two comprises:
taking the ammonium sulfate as the ore leaching agent, selecting 10 parts of the rare earth ore sample, each part comprising 20.0 g;
performing ore leaching with an ammonium sulfate solution according to a liquid-to-solid ratio of 5:1 mL/g, wherein the concentrations of the ammonium sulfate solution are 1.0 g/L, 1.5 g/L, 2.0 g/L, 3.0 g/L, 5.0 g/L, 7.0 g/L, 10.0 g/L, 13.0 g/L, 16.0 g/L and 20.0 g/L respectively;
oscillating the solution at first for 2.0 h, and then stewing the solution for 0.5 h;
performing solid-liquid separation on the solution with medium speed filter paper;
testing the concentration of the rare earth ions in the leachate by EDTA titrimetry to obtain the relationship curve of the concentration of the ore leaching agent solution and the concentration of the rare earth ions in the leachate;
taking the ion exchange selection coefficient as a basic unknown;
fitting a relationship curve of the concentration of the ore leaching agent and the concentration of the rare earth ions in the leachate with the ion exchange model; and
determining the ion exchange selection coefficient of the rare earth ore sample.