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

Claim 4:
5. 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 three comprises:
putting 20.0 g of a polymerized rare earth ore sample into a centrifuge bottle with the volume of 250 mL;
placing the centrifuge bottle on a magnetic stirrer, and pouring 100 mL of the ammonium sulfate solution at the concentration of 20.0 g/L into the centrifuge bottle;
turning on the magnetic stirrer at the same time at a rotating speed of 1000 r/min;
starting timing, and at predetermined reaction time: 0 s, 5 s, 10 s, 15 s, 20 s, 30 s, 60 s, 90 s and 150 s, quickly centrifuging a centrifuge box in a centrifuge with the set rotating speed being 3000 r/min and the set centrifuge time being 20 s;
after the centrifuging is ended, testing the concentrations of the rare earth ions in the leachate at different reaction time by EDTA titrimetry;
determining the generating rate of the rare earth ions in the external solution;
obtaining test data of the rate of change over time of the concentration of the rare earth ions adsorbed on the surfaces of the rare earth ore sample particles through the relational expression (16);
taking αNH4 and αRE as basic unknowns, and determining the αNH4 and αRE through fitting the data, obtained by the relational expression (16), by the relational expression (9).