In FK3000 enamel reaction tank, add 1000L of samarium chloride solution with the concentration of 0.23mol/L, the samarium chloride solution is heated to 93, add 300L of ammonium bicarbonate solution with the concentration of 2.5mol/L, the precipitation reaction is completed in 3 hours, the heat preservation aging is completed in 1 hour, washing, filtration, and then get the samarium carbonate and samarium carbonate alkaline precipitate, in which the weight ratio of samarium carbonate to samarium carbonate alkaline is 4:1; in 1000L fluoride transformation tank, add 130L of water, and then make the precipitation into slurry with paddle under stirring condition. Add 130L water in 1000L fluoride transformation tank, modulate samarium carbonate and samarium carbonate precipitate into slurry, add 40% hydrofluoric acid 40kg fluoride into the slurry under stirring, fluoride temperature at 20, control the endpoint acidity pH value of 1.5~2.0, and then continue to stir for 1 hour, then wash, filter, and centrifugal drying of samarium fluoride precipitate, and then dry in drying kiln at 200. The samarium fluoride precipitation was washed, filtered, centrifuged and dried in the drying kiln at 200 for 12 hours, and the center particle size of samarium fluoride product was 30.06μm.
