用流态化技术制取优质粗粒重铀酸铵  

PREPARATION OF HICH QUALITY AND COARSE GRAIN AMMONIUM DIURANATE BY FLUIDIZATION TECHNIQUE

作　　者：陈志洪[1] 黄昌海[1] 刘凤山[1] 向寨路 

机构地区：[1]核工业北京化工冶金研究院

出　　处：《铀矿冶》1994年第1期14-19,共6页Uranium Mining and Metallurgy

摘　　要：论述了采用流态化技术从硫酸－硫酸铵、硫酸－氯化物溶液体系中沉淀制取优质粗粒重铀酸铵的研究工作。在硫酸－硫酸铵溶液体系中，铀工厂常规搅拌沉淀产品含Ｕ６３．１８％、ＳＯ２４－１３．３％，产品粒度≥４０μｍ者占３３．９１％；采用硫态化技术沉淀，在最佳条件下，沉淀产品含Ｕ６９．９４％、ＳＯ２４－３．７％，产品粒度≥４０μｍ者占７５．８７％。在硫酸－氯化物溶液体系中，铀工厂常规搅拌沉淀产品含Ｕ５８％、Ｃｌ－５％，产品粒度≥４０μｍ者只占１．６％；采用流态化技术沉淀产品含Ｕ６８％、Ｃｌ－０．２２％，产品粒度≥４０μｍ者占４１．４６％。实验用流化床沉淀塔直径为４００ｍｍ，高３２００ｍｍ，结构简单，易稳定操作，对料液浓度变化适应性强，具有广阔的工业应用前景。he process of preparing ammonium diuranate with high quality and coarse grain is presented, which was precipitated by the fluidization technique in the sulphuric acid-ammonium sulphate or sulphuric acid-chloride solution systems. In the sulphuric acid-ammonium sulphate solution system, the product obtained by the conventional agitation-precipitation method contained 63.18% of U and 13.3% of SO42-, and the percentage of particles with diameter ≥40μm was 33.19%. Under the optimum conditions the values were 69.94%, 3.7%and 75.87% respectively with the fluidization technique. In the sulphuric acid-chloride solution system, the product obtained by the agitation method in the mill contained 58% of U and 5% of Cl-, and the percentage of particles with size ≥40μm was 1.6%. Using the fluidization method the values were 68%, 0.22% and 41.46% respectively. The diameter and height of the tested fluidized-bed equipment were 400 mm and 3200 mm. Its structure was simple, and it had good adaptabilily for variation in the solution concentration. It was operated easily and steadily and it will be expected to have broad industrial use.

关 键 词：重铀酸铵 制备 流态化 

分 类 号：TQ136.2[化学工程—无机化工]