Filtering device for uranium hydrometallurgy ion exchange tower

Abstract

The invention relates to a filtering device for a uranium hydrometallurgy ion exchange tower. The device consists of a barrel, a lower filtering plate, a connecting flange, a lower cross supporting plate, an upper filtering plate, an upper cross supporting plate, a screw and a filtering layer, wherein the connecting flange is fixed at the open end of the bottom of the barrel by welding; the lower cross supporting plate is fixed on the wall of the bottom in the barrel by welding; the lower filtering plate is fixed on the lower cross supporting plate and the wall in the barrel by welding; the upper cross supporting plate is fixed on the lower filtering plate and the wall in the barrel by welding; the upper filtering plate is fixed at the open end of the upper part of the barrel through the screw; and the filtering layer consisting of quartz sand of different particle sizes is arranged between the lower filtering plate and the upper filtering plate in the barrel.

Description

technical field [0001] The invention relates to a filter device, in particular to a filter device used for separating resin and quartz sand filter layers in the fixed bed ion exchange process of uranium hydrometallurgy. Background technique [0002] In-situ (heap) leaching has become an important leaching method in the current uranium hydrometallurgy process. The uranium concentration of the leaching solution obtained from them is generally low, so the ion exchange method is usually used to extract uranium from it. The optimal state of the resin for adsorbing uranium from the clear liquid is a dense bed, and the corresponding equipment includes fixed bed and dense moving bed devices. The equipment commonly used in China is a fixed bed. In order to prevent resin leakage, the commonly used filtration method is generally to artificially fill the bottom of the uranium hydrometallurgy ion exchange tower with a quartz sand filter layer. The main disadvantages of this method are: ...

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Problems solved by technology

The equipment commonly used in China is a fixed bed. In order to prevent resin leakage, the commonly used filtration method is generally to artificially fill the bottom of the uranium hydrometallurgy ion exchange tower with a quartz sand filter layer. The main disadvantages of this method are: (1) The resin is directly A large area is in contact with the quartz sand layer, which increases resin wear; (2) It is easy to cause the quartz sand layer and the resin layer to mix during the backwashing process, resulting in leakage; (3) It takes a long time and a lot of labor to replace the filter layer

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