Ore leaching method for ion-adsorbing type rare earth ore

A rare earth ore, adsorption-type technology, applied in the direction of improving process efficiency, can solve the problems of large amount of leaching aid and increased production cost, and achieve the effects of reducing dosage, promoting desorption, and reducing ammonia nitrogen pollution

Active Publication Date: 2015-12-02
JIANGXI UNIV OF SCI & TECH
View PDF7 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in this type of method, the amount of immersion aid i

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

[0035] Take 300 g of dry Longnan ion-adsorption type rare earth ore with an ion-phase rare earth grade of 0.8‰, and put it into a leaching column with an inner diameter of 45 mm. First, 150ml of ammonium sulfate solution with a concentration of 0.20mol / L is used as the leaching agent solution for the first leaching, and the rare earth leachate is collected for the first time; The mixed solution with EDTA concentration of 0.05mol / L is leached for the second time. When the concentration of rare earth in the effluent of the leaching column is less than 0.1g / L, the liquid addition is stopped, and the second rare earth leachate is collected; the peristaltic pump controls the leaching process The flow rate of the medium addition liquid is 0.8ml / L. The two leaching solutions were combined to form a total of 297ml. The rare earth concentration in the rare earth leaching solution was 0.79g / L (calculated as REO), and the rare earth leaching rate was 98.1%.

Embodiment 2

[0037] Take 300 g of dry Longnan ion-adsorption type rare earth ore with an ion-phase rare earth grade of 0.8‰, and put it into a leaching column with an inner diameter of 45 mm. First, 90ml of magnesium sulfate solution with a concentration of 0.30mol / L is used as the leaching agent solution for the first leaching, and the first rare earth leaching solution is collected; then the concentration of the leaching agent potassium sulfate is 0.10mol / L, and the leaching aid The mixed solution with a tea saponin concentration of 0.03mol / L is leached for the second time, and when the concentration of rare earth in the effluent of the leaching column is less than 0.1g / L, stop adding liquid, and collect the second rare earth leachate; the peristaltic pump controls the leaching The flow rate of liquid addition during extraction is 0.8ml / L. The two leaching solutions were combined to form a total of 302ml. The rare earth concentration in the rare earth leaching solution was 0.78g / L (calcu...

Embodiment 3

[0039] Take 300 g of dry Longnan ion-adsorption type rare earth ore with an ion-phase rare earth grade of 1.6‰, and put it into a leaching column with an inner diameter of 45 mm. First, use 210ml leaching agent solution for the first leaching, the concentrations of magnesium sulfate and ammonium sulfate in the leaching agent solution are 0.05mol / L respectively, and the rare earth leaching solution is collected for the first time; then configure the leaching agent magnesium sulfate concentration to be 0.10mol / L, the leaching aid glycine concentration is the mixed solution of 0.15mol / L to carry out the second leaching, when the rare earth concentration in the leaching column effluent is less than 0.1g / L, stop adding liquid, collect and obtain the second rare earth leachate; The peristaltic pump controls the flow rate of liquid addition during the leaching process to be 0.8ml / L. The two leaching solutions were combined to form a total of 297ml. The rare earth concentration in th...

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

PropertyMeasurementUnit
Concentrationaaaaaaaaaa
Login to view more

Abstract

The invention discloses an ore leaching method for ion-adsorbing type rare earth ore. According to the method, a leaching agent solution is adopted for first leaching of the ion-adsorbing type rare earth ore, most of hydrated rare earth ions easy to desorb and positive ions in the leaching agent solution perform exchangeable desorption, and the rare earth ions enter a first rare earth leaching solution; then an auxiliary leaching agent solution or a mixed solution of an auxiliary leaching agent and a leaching agent is adopted for second leaching of the ion-adsorbing type rare earth ore, the auxiliary leaching agent and hydrated rare earth ions difficult to desorb in the ion-adsorbing type rare earth ore perform complexing, desorption of rare earth difficult to leach is promoted, and a second rare earth leaching solution is obtained. The ore leaching method is simple and easy to control, the leaching rate of the rare earth is increased, the consumption of the leaching agent and the auxiliary leaching agent is reduced, production costs are reduced, and the ammonia-nitrogen pollution is reduced.

Description

technical field [0001] The invention relates to the field of rare earth hydrometallurgy, in particular to an ore leaching method for ion adsorption type rare earth ore. Background technique [0002] Ion-adsorption rare earth ore is a new type of exogenous rare earth mineral, which was first discovered in Ganzhou, Jiangxi Province, my country in 1969, and is widely distributed in seven southern provinces including Jiangxi, Guangdong, Guangxi, Hunan, Fujian, Yunnan, and Zhejiang. This kind of minerals has a complete distribution of rare earths, low radioactivity, and is rich in medium and heavy rare earth elements. It is a valuable strategic mineral resource in my country. Its development and utilization enriches medium and heavy rare earth resources, and can solve the problem that traditional endogenous rare earth ores almost only produce light rare earths. [0003] Under normal circumstances, the grade of full-phase rare earths in ion-adsorption rare earth ores is generally...

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
IPC IPC(8): C22B59/00C22B3/04
CPCY02P10/20
Inventor 肖燕飞黄莉徐志峰
Owner JIANGXI UNIV OF SCI & TECH
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