Method for the recovery of calcium fluoride and ammonia from aqueous ammonium fluoride solution originating from waste from fuel element production

摘要

In a process for treating waste waters produced in fuel element production and containing ammonium fluoride and carbonate it is provided according to the invention that ammonium fluoride and carbonate are converted, by reaction with calcium hydroxide and hydrofluoric acid, into fluorspar and ammonia or aqueous ammonia and that the products are then extracted. IMAGE