Method for removing radium from south ionic rare earth leachate
A technology of ionic rare earth and ionic rare earth ore, which is applied in the direction of improving process efficiency, can solve the problems of unsatisfactory radium removal effect, and achieve the effects of improving radium removal effect, good separation effect and simple process
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Embodiment 1
[0011] Southern ionic type rare earth leach solution, in which the concentration of rare earth ions is 1.7mol / L, the concentration of radium is 10Bq / L, and pH=3.0. Add iron filings to the rare earth leaching solution according to the mass ratio of iron filings: rare earth leaching solution 0.1:1000, stir and mix for 6 hours; add solid barium chloride to the above rare earth leaching solution according to the mass ratio of barium chloride: rare earth leaching solution 5:1000, stir and mix evenly Add 37%wt hydrogen peroxide according to the molar ratio of hydrogen peroxide: iron filings 10:1, after stirring for 1 hour, add 50ppm of 1%wt polyacrylamide solution, let it stand for clarification, suck out the clear liquid, filter, and precipitate In order to remove radium slag, the clear liquid is the rare earth leaching solution after radium removal, and the concentration of radium in it is 0.055Bq / L as measured by analysis.
Embodiment 2
[0013] Nanfang ionic rare earth leach solution, in which the concentration of rare earth ions is 1.2mol / L, the concentration of radium is 30Bq / L, and pH=4.0. Add ferrous sulfate to the rare earth leaching solution by ferrous sulfate: rare earth leaching solution mass ratio 0.2: 1000, stir and mix for 0.5 hour; press barium chloride: rare earth leaching solution mass ratio 10: 1000, add barium chloride to the above rare earth leaching solution, stir Mix evenly; add 20% sodium hypochlorite solution according to the molar ratio of sodium hypochlorite: iron filings 9:1, stir for 3 hours, add 9000ppm of 1%wt polyacrylamide solution, let it stand for clarification, suck out the clear liquid, filter, and precipitate That is to remove radium slag, and the clear liquid is the rare earth leaching solution after radium removal, and the concentration of radium in it is 0.065Bq / L as measured by analysis.
Embodiment 3
[0015] Nanfang ionic type rare earth leaching solution, in which the concentration of rare earth ions is 0.85mol / L, the concentration of radium is 20Bq / L, and pH=3.5. Add ferrous chloride to the rare earth leaching solution according to the mass ratio of ferrous chloride: rare earth leaching solution 10: 1000, stir and mix for 0.5 hours; press barium chloride: the mass ratio of rare earth leaching solution 5: 1000 to add 30%wt Barium chloride solution, stir and mix evenly; add 50% sodium hypochlorite according to the molar ratio of sodium hypochlorite:iron filings 5:1, stir for 0.5 hours, add 1%wt polyacrylamide solution of 1000ppm, let it stand for clarification, suck out the clear Liquid, filtration, precipitation is radium removal slag, clear liquid is rare earth leaching solution after radium removal, and the concentration of radium in it is 0.050Bq / L as measured by analysis.
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