从湿法磷酸中回收铀的步骤如下:(1)用溶解在惰性有机溶剂中的二烷基磷酸和三烷基氧膦有机相萃取氧化过的酸,以得到无铀的磷酸和含铀的有机相。(2)与氢氧化铵和碳酸铵反应以分离铀和碳酸铀酰铵。(3)无铀的溶剂再循环复用。本方法改进之处在于用大于两段的反萃取设备处理有机萃取剂,方法如下:(a)在第一段的前端加入萃取剂;(b)在第一段底部逆向加入氨和氨水,pH控制在8.0—8.5;(c)在未端底部加入50—80％(重量)碳酸铵溶液以中和二烷基磷酸,并将铀转化成碳酸铀酰铵;(d)用酸处理氨化 The steps of recovering uranium from wet-process phosphoric acid are as follows: (1) Oxidized acid is extracted with a dialkylphosphoric acid and a trialkylphosphine oxide organic phase dissolved in an inert organic solvent to obtain uranyl-free phosphoric acid and uranium-containing The organic phase. (2) Reacts with ammonium hydroxide and ammonium carbonate to separate uranium and ammonium uranyl carbonate. (3) uranium-free solvent recycling reuse. The improvement of this process consists in treating the organic extractant with more than two stripping equipment by: (a) adding an extractant to the front end of the first stage; (b) reverse addition of ammonia and aqueous ammonia at the bottom of the first stage, pH Controlled at 8.0-8.5; (c) adding 50-80 wt% ammonium carbonate solution at the bottom to neutralize the dialkyl phosphate and convert the uranium to ammonium uranyl carbonate; (d)