بررسي پارامترهاي موثر در فروشويي ستوني و امكان استفاده از آنها در روش فروشويي تپه اي كانيهاي اورانيوم ساغند

Application of Laboratory Column Leaching tests in Heap Leaching Technique

The most important aspects of heap leaching is itʹs potential to produce uranium at lower costs, if it is applied to a suitable ore deposit. Prior to set up a heap at industrial scale, it is necessary to collect data on leaching behavior of the ore by laboratory column leaching tests. This paper discusses the research work performed to determine permeability of the ore, the consumption of chemicals, the composition of leach solution and influence of effective parameters on uranium recovery. A laboratory system was developed for simultaneous column leaching test on 6 column with 6 different samples coming from different points of ore body at the same time. Tests were carried out on 3 samples (2 column of each), I- Main ore body 2- Representative sample from ores 3- Radiometric concentrate of surface sample Dependence of the recovery with the treatment condition, time (d), L/S (l/t), acid(kg/t) oxidant (kg/t), PH, EMF were studied. As a result the recovery of U was more than 90% for a period of 3 weeks and (98% in 4 weeks) while the consumption of acid was 55kg/t.