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Method for extracting rare earth from kaolin product containing ion-type rare earth

A technology of ionic rare earth and kaolin, applied in the direction of improving process efficiency, can solve the problems of poor permeability, strong viscosity, recovery of ionic rare earth, etc., so as to solve the problem of environmental pollution, solve the problem of poor permeability and effectively utilize resources. Effect

Inactive Publication Date: 2012-07-11
GANZHOU RARE EARTH MINERAL IND +1
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AI Technical Summary

Problems solved by technology

[0002] Although kaolin is easy to disperse and suspend in water, it is difficult to separate solid and liquid due to its strong viscosity and poor permeability.
At present, there is no process that can effectively recover ionic rare earths from kaolin, and the ionic rare earths in kaolin cannot be fully recycled.

Method used

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  • Method for extracting rare earth from kaolin product containing ion-type rare earth
  • Method for extracting rare earth from kaolin product containing ion-type rare earth

Examples

Experimental program
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Embodiment Construction

[0013] Pretreatment: After beneficiation of kaolin raw ore, it is made into kaolin products with ionic rare earth grade reaching the lowest mining industrial grade.

[0014] Pounding: The method of pounding is used to overcome the technical problem of poor permeability of kaolin. Mix the kaolin product containing ionic rare earth with 20g / L ammonium sulfate solution at a mass ratio of 1:3-4, mash and leaching the ore for 4 to 8 hours to form a pulp with a concentration of 20%-25% by mass;

[0015] Ore leaching: pump the ore pulp into the leaching pool, and stir continuously in the leaching pool to fully react the ionic rare earth in the kaolin product with ammonium sulfate;

[0016] Plate and frame filter press: the method of pounding is used to overcome the technical problem that kaolin is difficult to separate solid and liquid. Filter the ore pulp in the leaching pool with a plate-and-frame filter press, the filter cloth mesh of the plate and frame is 850 mesh, the working ...

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Abstract

The invention relates to a method for recovering ion-type rare earth from clay mineral, especially to a method for extracting rare earth from a kaolin product containing ion-type rare earth. The technology contains the following steps of: pretreating, smashing into a paste, leaching ore, carrying out plate pressure filtration and carrying out subsequent processing to finally prepare the rare earth product and kaolin. By the paste smashing technology, the kaolin product and a leaching solution are fully mixed, thus solving the defect of poor permeability of kaolin. The plate pressure filtration technology is adopted to solve the defect that it is hard to separate a solid from a liquid in the kaolin. By the adoption of the method, ion-type rare earth in the kaolin product can be fully recovered, resources can be effectively utilized, and enterprise benefits can be greatly increased. The whole technology is adopted to realize fully-closed circulation and thoroughly solve the environmental pollution problem caused by sewage discharge.

Description

technical field [0001] The invention relates to a method for recovering ionic rare earths from clay minerals, in particular to a method for extracting rare earths from kaolin products containing ionic rare earths. Background technique [0002] Although kaolin is easy to disperse and suspend in water, it is difficult to separate solid and liquid due to its strong viscosity and poor permeability. At present, there is no process that can effectively recover ionic rare earths from kaolin, and the ionic rare earths in kaolin cannot be fully recycled. Contents of the invention [0003] The object of the present invention is to provide a method for extracting rare earths from kaolin products containing ionic rare earths in view of the above characteristics of kaolin. [0004] Technical scheme of the present invention is as follows: process step is as follows in sequence: [0005] Pretreatment: After beneficiation of kaolin raw ore, it is made into kaolin products with ionic...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B3/04C22B3/22
CPCY02P10/20
Inventor 郭小斌陈爱平王明
Owner GANZHOU RARE EARTH MINERAL IND
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