LABORATORY AND PILOT PLANT EVALUATION OF COLORADO VITRO AND CANONSBURG VITRO URANIUM CONCENTRATE

摘要

The laboratory and pilot plant evaluations of Canonsburg Vitro and Colorado Vitro concentrates are presented in this report. These concentrates meet all FMPC impurity tolerance limits. Laboratory digestion tests have revealed that both concentrates contain excessive quantities of nitric acid - insoluble uranium at normal digestion conditions. The insoluble uranium content of these con¬centrates can be reduced by a "hot-concentrated" digestion procedure. A pilot plant pulse column test indicated that these materials can be processed in normal National Lead Company of Ohio refinery feed blends when this "hot-concentrated" digestion procedure is utilized.