Method for applying baotite mixed carbonate-rare earth precipitation wastewater in precipitation of europium (II) sulfate
A technology of rare earth carbonate and europium sulfate, applied in the direction of improving process efficiency, etc., can solve the problems of waste of resources, environmental pollution, high production costs, etc., and achieve the effect of increasing the yield of rare earth and reducing waste of resources
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Embodiment 1
[0013] Baotou rare earth concentrate mixed rare earth carbonate precipitation wastewater contains ammonium sulfate 0.28mol / L, magnesium sulfate heptahydrate 0.2mol / L, the volume of the wastewater is concentrated 5 times, and the concentrated solution contains ammonium sulfate 1.4mol / L, seven Magnesium sulfate water 1mol / L, cooled for later use.
[0014] at 3M 3 In the reaction tank, add 2M 3 Samarium-europium-gadolinium-enriched material solution, the rare earth concentration of the material solution is 1mol / L, the acidity of the material solution is pH=4, and the content of europium oxide in the material solution is Eu 2 o 3 / REO is 10%, add 12.32kg of zinc powder, add 166.5 liters of concentrated ammonium sulfate and magnesium sulfate mixed solution, start stirring for 2 hours, clarify for 4 hours, filter, and the obtained filter cake is europium sulfate precipitate, the content of europium oxide Eu 2 o 3 / REO=92.6%, the filtrate is a samarium-gadolinium enrichment solu...
Embodiment 2
[0016] Baotou rare earth concentrate mixed rare earth carbonate precipitation wastewater contains ammonium sulfate 0.28mol / L, magnesium sulfate heptahydrate 0.2mol / L, the volume of the wastewater is concentrated 5 times, and the concentrated solution contains ammonium sulfate 1.4mol / L, seven Magnesium sulfate water 1mol / L, cooled for later use.
[0017] at 3M 3 In the reaction tank, add 2M 3 Samarium-europium-gadolinium-enriched material solution, the rare earth concentration of the material solution is 1.2mol / L, the acidity of the material solution is pH=4, and the content of europium oxide in the material solution is Eu 2 o 3 / REO is 8%, add 11.83kg of zinc powder, add 160 liters of concentrated ammonium sulfate and magnesium sulfate mixed solution, start the stirring reaction for 2 hours, clarify for 4 hours, filter, and the obtained filter cake is europium sulfate precipitate, the content of europium oxide Eu 2 o 3 / REO=92.8%, the filtrate is a samarium-gadolinium enr...
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