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公开(公告)号：EP2370978A1
公开(公告)日：2011-10-05
申请号：EP09760838.4
申请日：2009-11-23
摘要： The invention relates to a method and to an arrangement for producing spherical fuel cores and/or breeder material cores by dripping a pouring solution containing uranyl nitrate and a solution containing at least one auxiliary agent into an ammoniacal precipitation bath in order to form microspheres, aging and washing the microspheres produced in such a way in an ammonia solution, drying, and thermally treating said microspheres. In order to take into consideration the special characteristics of uranium chemistry for cores and to provide a continuous production method along with a constantly high core quality in the method, it is proposed that the microspheres from the precipitation bath be separated through a first separator and fed to the ammoniacal aging water for aging, that the contact duration of the microspheres with the liquid of the precipitation bath before being introduced into the aging water be set equally or substantially equally, that the microspheres be transferred from the aging water to a multi-stage cascade scrubber using a transfer device, wherein the microspheres are washed in the multi-stage cascade scrubber so as to be free or substantially free from ammonium nitrate and at least one auxiliary agent contained in the microspheres, and that after the microspheres are dried, the microspheres are calcinated while distributed in a monolayer during a thermal treatment.
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公开(公告)号：EP2370978B1
公开(公告)日：2013-03-13
申请号：EP09760838.4
申请日：2009-11-23
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3.发明公开
公开(公告)号：EP2160358A1
公开(公告)日：2010-03-10
申请号：EP08759783.7
申请日：2008-05-20
发明人： HEIT, Werner , KADNER, Martin , BRAEHLER, Georg , FROSCHAUER, Karl , WENLI, Guo , TONXIANG, Liang , CHUNHE, Tang
CPC分类号： C01G43/025 , B01J2/06 , C01F15/00 , C01G56/005 , G21C3/42 , G21C3/62 , G21C3/623 , Y02E30/38
摘要： The invention relates to a method for the production of spherical combustible or fertile material particles from an oxide of the group of the heavy metals uranium, thorium, plutonium, or mixtures thereof. For this purpose, the process steps of producing a base solution of the nitrates of the heavy metal(s), adding at least one first reagent in order to adjust the viscosity of the solution, dropping the solution to form microspheres, at least superficially solidifying the microspheres in an atmosphere containing ammonia, collecting the microspheres in a solution containing ammonia, and subsequent washing, drying and thermal treatment are carried out, wherein urea and/or ammonium carbonate and/or ammonium hydrogen carbonate and/or ammonium cyanate and/or biuret are added to the base solution before adding the first reagent, and the solution thus prepared is heated to a temperature T at 80° ≤ T
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