Rare earth extracting and impurity removing device

Abstract

The invention provides a rare earth extracting and impurity removing device. A hidden chamber A of an extracting and impurity removing chamber is communicated with a feed liquid guide-in pipe. A water phase chamber A of a feed liquid clarifying chamber is communicated with the feed liquid guide-out pipe. The hidden chamber A and multiple mixing chambers A are arranged in the extracting and impurity removing chamber. The mixing chambers are partitioned through overflowing plates A and flow blocking plates A. The overflowing plates A are fixed to the bottom of the extracting and impurity removing chamber, and the height of the overflowing plates A is smaller than the depth of the extracting and impurity removing chamber. The flow blocking plates A are fixed to the upper portion of the extracting and impurity removing chamber, and the lower ends of the flow blocking plates do not make contact with the bottom of the extracting and impurity removing chamber. After the device is adopted for removing impurities, continuous production process is achieved in the extracting and impurity removing processes, the impurity removing and extracting agent can be recycled automatically, and material overstock is reduced; no staff are needed for carrying out operation, and the impurity removing effect is efficient and stable; feed liquid automatically flows back to a separating and extracting groove after the impurities are removed, and the speed of the feed liquid is synchronous with the flowing speed of the separating and extracting groove.

Description

technical field [0001] The invention relates to the technical field of rare earth extraction and separation, in particular to a rare earth extraction and impurity removal device. Background technique [0002] In the extraction and separation process of rare earth, part of the aqueous phase feed liquid contains relatively high content of non-rare earth impurities such as iron and lead, especially in the stripping liquid. These feed liquids containing non-rare earth impurities will cause the emulsification of the extractant and the increase of three-phase matter, which will affect the effect of extraction and separation. Therefore, in production, it is necessary to draw this part of feed liquid from the rare earth separation and extraction tank, remove the non-rare earth impurities therein and then return to the separation and extraction tank. The existing impurity removal equipment is a single-stage extraction and impurity removal reaction kettle. First, the impurity removal...

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Problems solved by technology

[0003] Although this kind of equipment can satisfy the operation of the separation and extraction tank, it has the following disadvantages: 1. The impurity removal process is intermittent production, which requires many equipment, long steps, and a large backlog of process materials; 2. The extraction and removal process requires The impurity removal effect is easily affected by human factors; 3. After the impurity removal, the feed liquid can only be introduced into the separation extraction tank through the high level tank or the pump to control the flow rate, and it is difficult to synchronize the flow rate with the separation extraction tank

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