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Nd/Sm-Dy/Ho group separation process method of medium-yttrium europium-enriched ore

A process method and extraction technology, applied in the Nd/Sm~D field where the rare earth extraction amount is not lower than the rare earth saponification amount, can solve the problems of reducing the extraction amount and washing amount, large consumption of acid-base reagents, and many extraction stages, etc. Achieve the effect of improving the degree of greening, reducing the consumption of acid and alkali, and reducing the total investment

Inactive Publication Date: 2015-04-29
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to propose a new method for the disadvantages of existing middle yttrium-europium-rich ore~Nd / Sm~Dy / Ho~group separation process that consumes a lot of acid-base reagents, has many extraction stages and high separation cost. In Nd / Sm~Dy / Ho group separation, the yttrium-europium-rich ore process method reduces the amount of extraction and washing through the two-in and three-out fractional extraction technology, and eliminates the side effects of hydrogen ion washing through the acid extraction section, so as to reduce the acid-base separation of rare earths. Consumption, improve the efficiency of fractionation extraction stage of yttrium-rich europium ore, reduce the cost of rare earth separation

Method used

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  • Nd/Sm-Dy/Ho group separation process method of medium-yttrium europium-enriched ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Rare earth liquid

[0031] The first medium yttrium-europium-rich ore rare earth chloride aqueous solution has a rare earth concentration of 1.2 M and a pH value of 2; in terms of rare earth elements, the molar fraction of light rare earth elements La to Nd is 0.55, and the molar fraction of Sm to Dy is 0.15 , the mole fraction of Ho~Lu and Y is 0.30.

[0032] The second rare earth chloride aqueous solution of medium yttrium and europium rich ore has a rare earth concentration of 1.2 M and a pH value of 1; in terms of rare earth elements, the molar fraction of light rare earth elements La to Nd is 0.55, and the molar fraction of Sm to Dy is 0.15 , the mole fraction of Ho~Lu and Y is 0.30.

[0033] In terms of the molar ratio of rare earth ions, the feed ratio of the first rare earth feed liquid to the second rare earth feed liquid is 1:1.

[0034] 2) Rare earth extraction organic phase

[0035] The rare earth extraction organic phase is a kerosene solution of P507...

Embodiment 2

[0050] 1) Rare earth liquid

[0051] The first medium yttrium-europium-rich ore rare earth chloride aqueous solution has a rare earth concentration of 1.0 M and a pH value of 3; in terms of rare earth elements, the molar fraction of light rare earth elements La to Nd is 0.55, and the molar fraction of Sm to Dy is 0.15 , the mole fraction of Ho~Lu and Y is 0.30.

[0052] The second rare earth chloride aqueous solution of medium yttrium and europium rich ore has a rare earth concentration of 1.0 M and a pH value of 1; in terms of rare earth elements, the molar fraction of light rare earth elements La to Nd is 0.55, and the molar fraction of Sm to Dy is 0.15 , the mole fraction of Ho~Lu and Y is 0.30.

[0053] In terms of the molar ratio of rare earth ions, the feed ratio of the first rare earth feed liquid to the second rare earth feed liquid is 2:1.

[0054] 2) Rare earth extraction organic phase

[0055] The rare earth extraction organic phase is a kerosene solution of P507...

Embodiment 3

[0070] 1) Rare earth liquid

[0071] The first medium-yttrium-europium-rich ore rare earth chloride aqueous solution has a rare earth concentration of 1.5 M and a pH value of 2; in terms of rare earth elements, the molar fraction of light rare earth elements La to Nd is 0.55, and the molar fraction of Sm to Dy is 0.15 , the mole fraction of Ho~Lu and Y is 0.30.

[0072] In the second part, the rare earth chloride aqueous solution of yttrium and europium-rich ore has a rare earth concentration of 1.0 M and a pH value of 1; in terms of rare earth elements, the molar fraction of light rare earth elements La to Nd is 0.50, and the molar fraction of Sm to Dy is 0.15 , the mole fraction of Ho~Lu and Y is 0.35.

[0073] In terms of the molar ratio of rare earth ions, the feed ratio of the first rare earth feed liquid to the second rare earth feed liquid is 1:1.

[0074] 2) Rare earth extraction organic phase

[0075] The rare earth extraction organic phase is a sulfonated kerosene...

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Abstract

The invention discloses an Nd / Sm-Dy / Ho group separation process method of a medium-yttrium europium-enriched ore. P507 is used as a rare earth extracting agent, medium-yttrium europium-enriched ore is used as a raw material, a third outlet is formed in an extraction washing section of a two-inlet-three-outlet fractional extraction system and an acid extraction section with N235 as an acid extracting agent and TBP as a demulsifier is arranged between a washing section and a reverse extraction section; the side effects of hydrogen ions is eliminated by virtue of the acid extraction effect of N235. Compared with the existing Nd / Sm-Dy / Ho group separation process of the medium-yttrium europium-enriched ore, the acid and base consumptions during the rare earth separation process can be significantly reduced, wherein the consumption of a basic reagent is decreased by 58.2%-64.5% and the consumption of hydrochloric acid is decreased by 22.7%-34.2%; the wastewater discharge amount during the extraction and separation of rare earth is significantly reduced and the environmental friendliness degree for separating rare earth is significantly increased; the number of stages of an extraction tank can be reduced by 12.7%-22.2% and the total investment of rare earth extraction and separation processes is decreased; and the quality of heavy rare earth products is improved.

Description

technical field [0001] The present invention relates to a process method of yttrium-europium-rich ore in group separation of Nd / Sm~Dy / Ho, especially relates to the separation of phosphonate P507 as a rare earth extractant and N235 as a hydrochloric acid extractant and a fractional distillation extraction system with two in and three out Medium-yttrium-europium-rich ore, a process method for separating rare earths in groups of Nd / Sm~Dy / Ho in which the extraction amount of rare earths in the fractionation extraction system is not lower than the saponification amount of rare earths. The invention belongs to the field of solvent extraction in hydrometallurgy. Background technique [0002] Medium-yttrium-europium-rich ore is the ion-adsorption rare earth ore with the largest reserves. The content of light rare earth elements La~Nd is about 55%, the content of medium rare earth elements Sm~Dy is about 15%, and the content of heavy rare earth elements Ho~Lu and Y The content is ab...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B3/38
CPCY02P10/20
Inventor 钟学明
Owner NANCHANG HANGKONG UNIVERSITY
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