A method for recovering rare earth from rare earth tailings

A rare earth tailing and rare earth technology, applied in the field of mineral processing engineering, can solve the problems of low utilization efficiency of mine tailings, tailings occupying large land, ecological environment hazards, etc. Harmful effect

Active Publication Date: 2021-08-10
CHINALCO GUANGXI NONFERROUS RARE EARTH DEV CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, with the massive development and utilization of rare earth mineral resources, the ore is increasingly scarce, and at the same time, the utilization efficiency of mine tailings is low, resulting in the accumulation of tailings and occupying a large amount of land, and also causing great harm to the ecological environment.
Existing tailings reuse often adopts flotation method, and rare earth minerals are obtained after multiple flotation of rare earth tailings, but the multiple flotation steps are complicated, and a large amount of flotation reagents are required to ensure the recovery rate of rare earths

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for recovering rare earth from rare earth tailings, comprising the following steps:

[0022] (1) Pulverize dolomite and pass through a 200-mesh sieve, then mix dolomite with sulfuric acid with a mass concentration of 25% according to a mass ratio of 1:1 to prepare slurry A;

[0023] (2) Use the slurry A obtained in step (1) to spray the rare earth tailings, the mass ratio of the slurry A to the rare earth tailings is 1:1, and the spraying speed of the slurry A is 2.5kg / (m 2 ˑh), and then collect the leachate;

[0024] (3) Mix and stir the leach solution obtained in step (2) and the extractant according to the volume ratio of 1:1.5 for 10 hours, and then stand and separate the organic phase and the aqueous phase by layering; the extractant includes the following parts by volume: Components: 10 parts of P507, 10 parts of P204, 1.5 parts of auxiliary agent, the auxiliary agent is butanediol;

[0025] (4) Mix and stir the organic phase in step (3) and hydrochlori...

Embodiment 2

[0028] A method for recovering rare earth from rare earth tailings, comprising the following steps:

[0029] (1) Pulverize dolomite and pass through a 180-mesh sieve, then mix dolomite with sulfuric acid with a mass concentration of 20% according to a mass ratio of 1:2 to prepare slurry A;

[0030] (2) Use the slurry A obtained in step (1) to spray the rare earth tailings, the mass ratio of the slurry A to the rare earth tailings is 2:1, and the spraying speed of the slurry A is 2kg / (m 2 ˑh), and then collect the leachate;

[0031] (3) Mix and stir the leaching solution obtained in step (2) and the extractant for 9 hours according to the volume ratio of 1:1.2, and then stand and separate the organic phase and the aqueous phase by layering; the extractant includes the following parts by volume: Components: 15 parts of P507, 10 parts of P204, 2 parts of auxiliary agent, the auxiliary agent is propanol;

[0032] (4) Mix and stir the organic phase in step (3) with hydrochloric a...

Embodiment 3

[0035] A method for recovering rare earth from rare earth tailings, comprising the following steps:

[0036] (1) Pulverize dolomite and pass through a 150-mesh sieve, then mix dolomite with sulfuric acid with a mass concentration of 30% according to a mass ratio of 1:3 to prepare slurry A;

[0037] (2) Spray the rare earth tailings with the slurry A obtained in step (1), the mass ratio of the slurry A to the rare earth tailings is 1.5:1, and the spraying speed of the slurry A is 3kg / (m 2 ˑh), and then collect the leachate;

[0038] (3) Mix and stir the leaching solution obtained in step (2) and the extractant for 8 hours according to the volume ratio of 1:1, and then stand and separate the organic phase and the aqueous phase by layering; the extractant includes the following parts by volume: Components: 20 parts of P507, 10 parts of P204, 1 part of auxiliary agent, the auxiliary agent is a mixture of propylene glycol and butanediol;

[0039] (4) Mix and stir the organic phas...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for recovering rare earth from rare earth tailings. Firstly, dolomite is pulverized and then mixed with sulfuric acid in proportion to prepare slurry A; then the slurry A is used to spray the rare earth tailings, and then the leaching solution is collected; Mix the leaching solution and the extractant in proportion, then stand and separate the organic phase and the water phase by layering; then mix the organic phase and hydrochloric acid with a molar concentration of 5.5mol / L in proportion, then leave the organic phase for layering and separation to obtain Solution B containing rare earth chlorides, adding sodium carbonate solution to solution B for precipitation, and filtering the obtained rare earth carbonates after precipitation, the rare earth carbonates can be calcined at high temperature to obtain rare earth oxides. The method of the invention can effectively improve the recovery rate of the rare earth, and the process is simple and easy to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of mineral processing engineering, and in particular relates to a method for recovering rare earth from rare earth tailings. Background technique [0002] Rare Earth is a general term for seventeen metal elements including lanthanides, scandium and yttrium in the chemical periodic table. There are 250 kinds of rare earth minerals in nature. Rare earth elements are widely used in agriculture, aerospace, electronics manufacturing, transportation and medical industries, etc., and are of great significance to high-tech and economics, and are called "industrial gold". my country is the world's largest rare earth resource country, known as the "rare earth kingdom". my country's proven rare earth resource reserves are 43 million tons, accounting for 43% of the world's total reserves, and my country's annual output of rare earth elements has accounted for To more than 95% of the world's total output. [0003] At pr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C22B59/00C22B7/00C22B3/40
CPCC22B7/007C22B59/00C22B3/409Y02P10/20
Inventor 张新光胡振光韦世强谭海翔郭怀兵甘培原姚骥朱和玲梁超杰计策杨鹏喜廖思源莫裕杏
Owner CHINALCO GUANGXI NONFERROUS RARE EARTH DEV CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap