بررسي پارامترهاي سيستم تبادلي يوني بستر متحرك چند محفظه اي

Study of Moving Bed Multiple Compartment Ion-Exchange Parameters

In uranium yellow cake production, for the extraction and purification of uranium, primarily the uranium ore is grounded, sieved and then leached with (sulphuric acid). The ion-exchange has been identified as a proper method in high perfect recovery of uranium from the acidic solution where uranium concenteration is less than 500ppm. This method is operated in two ways: 1 (fixed bed 2) moving bed. Moving bed system has some advantages over the fixed bed such as higher mass transfer during ion exchange process. In this study, the effects of various parameters of multiple compartment ion exchange in recovery of uranium are investigated. After performing different experiments in batch system, the optimum pH of feed solution was found to be equal to 1.5 and the residence time between the resin and feed solution was 3 hours. Also, the results of fluidized bed continious system include the optimum flow rate of 221it/hr and the residence time of 7 minutes (the height of column was 180cm). To increase the efficiency in height limit, the recycle system is used.