2004•Mining and Metallurgical EngineeringRequires access
A New Process of Extracting Uranium by Alkaline Heap Leaching
Xiaowen Zhang
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Abstract
A study has been made on a new process of extracting uranium by alkaline heap leaching, which is an intensified leaching by adding lixiviant (Na 2CO 3,NaHCO 3) and heating. The process circuit is as the following: original ore →crushing → roasting → pretreatment → heating → leaching and washing → concentration and purification. Using this technique can make the extracting rate of uranium reach to 82% and above (51% for conventional heap leaching) under the condition of leaching for 8 days (36 days for conventional heap leaching) at a liquid -solid ratio of 0.8(2.7 for conventional heap leaching). Therefore, the concentration of uranium metal doubly increases, which is beneficial for concentrating and purifying uranium.