A kind of oxalic acid rare earth precipitation washing system

Abstract

The invention relates to the field of rare earth product producing apparatuses and especially relates to a washing system of rare earth oxalate precipitations. The system includes a rare earth oxalate reaction kettle and a precipitation washing apparatus. The reaction kettle is arranged above the precipitation washing apparatus and is connected to the precipitation washing apparatus through a pipeline. The precipitation washing apparatus comprises a filtering barrel, a vacuumizing apparatus and a water collecting barrel. A water discharge pipe and a gas discharge pipe are disposed on a lower part of the filtering barrel and the other end of the filtering barrel is connected respectively to the water collecting barrel and the vacuumizing apparatus. In the system, the precipitations are washed and filtered in the self-made filtering barrel and the washing process is divided into a plurality of steps, wherein water, except in a first washing step, in the other steps are all collected for washing the follow-up precipitation while the water in the first washing step is discharged out, so that utilization rate of water resource can be greatly increased and waste water discharge is reduced. By means of a vacuumizing process after the washing process, moisture in the precipitations can be effectively removed for reducing volume of the rare earth oxalate precipitations, so that a subsequent burning time can be shortened, energy required in burning is saved, a production period of a rare earth oxide is shortened and a production cost is reduced.

Description

technical field [0001] The invention relates to the field of rare earth product preparation devices, in particular to a rare earth oxalate precipitation washing system. Background technique [0002] Rare earth is a group of new functional materials with multiple properties such as electricity, magnetism, light, and biology. It is an important basic material for high-tech fields such as information technology, biotechnology, and energy technology and national defense construction. Traditional industries such as agriculture, chemicals, and building materials play an important role. Rare earths are widely used, and there are many kinds of functional materials that can use rare earths. A large-scale high-tech industrial group is being formed, with very broad market prospects and extremely important strategic significance. [0003] In the production process of rare earth oxides, it is generally necessary to convert rare earth ores into rare earth salt precipitation, such as rare...

AI Technical Summary

Problems solved by technology

At this time, if there are people or equipment nearby, it will cause serious casualties and equipment damage.

In addition, during the drying process of the centrifuge, it is easy to throw the rare earth precipitate out of the machine, and the process of transferring from the filter equipment to the centrifuge will also cause the loss of rare earth resources, thereby wasting rare earth resources and affecting the product yield.

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