Extraction method of weathering crust elution-deposited rare earth ore

A technology of weathering crust leaching type and extraction method, which is applied in the direction of improving process efficiency, etc., can solve the problems of high pollution, achieve high product quality, low cost, and improve the effective utilization rate

Active Publication Date: 2021-06-25
CENT SOUTH UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high pollution in the in-situ leaching process, and propose a method for extracting weathering crust leaching type rare earth ores. Reduce damage to the environment

Method used

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  • Extraction method of weathering crust elution-deposited rare earth ore

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Experimental program
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Embodiment 1

[0026] Select weathering crust leaching type rare earth ore for drying treatment, wherein the total rare earth element content is ≥ 0.05%, use glucose as substrate, and cultivate 24 hours under the environment conditions suitable for the growth of Aspergillus flavus (purchased Aspergillus flavus ATCC13697) to obtain rich yellow The culture liquid of Aspergillus flavus and its metabolites or the extract rich in Aspergillus flavus and its fermentation products obtained by centrifugation after 7 days of fermentation in a fermenter; the concentration of 0.05mol / L citric acid and 0.03mol / L ammonium citrate Mix the solution, mix the Aspergillus flavus culture solution with citric acid and ammonium citrate solution according to the volume ratio of 2:1 as extractant 1, and use the Aspergillus flavus fermentation extract with citric acid and ammonium citrate solution according to the volume ratio of 2:1 1 is mixed evenly as the leaching agent 2, dissolved with 1.0mol / L dilute sulfuric a...

Embodiment 2

[0035] Select the weathering crust elution type rare earth ore to carry out drying treatment, wherein the total rare earth element content ≥ 0.05%, take corn flour hydrolyzate as the substrate, and cultivate 48 hours under the environmental conditions suitable for the growth of Aspergillus niger (A spergillusniger ATCC10577 purchased), Obtain a culture solution rich in Aspergillus niger and its metabolites or obtain an extract rich in Aspergillus niger and its fermentation products through an extraction process after fermentation and cultivation in a fermenter for 8 days; the concentration of the configuration is 0.06mol / L of malic acid and 0.03mol / L L magnesium malate mixed solution; mix Aspergillus niger culture solution with malic acid and magnesium malate mixed solution according to the volume ratio of 3:1, and use it as leaching agent 1 or mix Aspergillus niger fermentation product extract with malic acid and magnesium malate The mixed solution is mixed evenly according to...

Embodiment 3

[0042] The weathering crust leaching type rare earth ore is selected for drying treatment, wherein the total rare earth element content is ≥ 0.05%, using glucose as a substrate, and culturing for 48 hours under the environment conditions suitable for the growth of Yarrowia lipolytica (purchased Yarrowialipolytica ATCC30162) to obtain rich The culture solution containing Yarrowia lipolytica and its metabolites or the extract rich in Yarrowia lipolytica and its fermentation products obtained by centrifugation after 9 days of fermentation in a fermenter, and the concentration of 0.1mol / L acid and 0.05mol / L ammonium itaconate mixed solution, Yarrowia lipolytica culture solution and itaconic acid and ammonium itaconate mixed solution are mixed uniformly according to the volume ratio of 4:1, as leaching agent 1, the solution After the Yarrowia lipolytica fermentation product extract and the mixed solution of itaconic acid and ammonium itaconate are mixed uniformly according to the vo...

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Abstract

The invention discloses an extraction method of weathering crust elution-deposited rare earth ore. According to the extraction method, a biological leaching and organic acid (salt) combined leaching process is mainly adopted in the leaching stage, clean and efficient extraction of rare earth resources is achieved on the premise that the environment is not polluted, and the extraction method has the advantages of being good in leaching effect, low in cost, environmentally friendly and the like. According to the process, impurity dissolution can be reduced, and the rare earth separation efficiency and the product quality can be improved; microorganisms and metabolites of the microorganisms can enhance the permeability of a leaching agent, reduce leaching blind areas and increase the effective utilization rate of the rare earth resources, and pollutant degradation and ecological restoration are partially facilitated; and rare earth elements are enriched through solvent extraction and reverse extraction technologies, and then a high-quality rare earth product can be obtained through a precipitation method.

Description

technical field [0001] The invention belongs to the field of mineral processing and hydrometallurgy, and in particular relates to an extraction method of weathering crust leaching type rare earth ore. Background technique [0002] Rare earths are composed of lanthanide elements in the third subgroup and 17 elements such as yttrium and scandium with similar properties. Rare earth elements have a special 4f electron layer structure, which makes them have some unique properties compared with other elements, resulting in many unique uses of these elements in many industries. It is widely used in petrochemical, catalytic materials, magnetic materials, precision ceramics, fluorescent materials, hydrogen storage materials and other high-tech fields, and has always been known as "industrial monosodium glutamate". [0003] Weathering crust elution-type (ion-type) rare earth ore is the earliest discovered in my country, a unique type of rare earth resource, and it is also a non-miner...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18C22B59/00
CPCC22B3/18C22B59/00Y02P10/20
Inventor 邱冠周王军赵红波申丽孟晓宇张叶娟
Owner CENT SOUTH UNIV
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