Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for extracting uranium from uranium-contained niobium-tantalum leached tailings

A leaching, niobium and tantalum technology, applied in the field of uranium extraction, can solve problems such as radioactive pollution, uranium extraction difficulty, emulsified anion exchange resin poisoning, etc., and achieve the effect of reducing energy consumption, reducing raw material consumption, and high recovery rate

Active Publication Date: 2012-01-11
BEIJING RES INST OF URANIUM GEOLOGY
View PDF2 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, niobium and tantalum tailings contain residual acid (hydrofluoric acid, sulfuric acid), organic components (MIBK, etc.) and inorganic components (iron, aluminum, etc.), which cause great difficulties in the extraction of uranium, such as emulsification during extraction Severe, anion exchange resin poisoning, etc.
Since there is no effective extraction technology at present, the production enterprises generally seal up this kind of niobium and tantalum tailings, which not only brings radioactive pollution, but also prevents this kind of uranium resources from being fully utilized

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

[0019] Step 1, sulfuric acid leaching, weighing 500g of the above-mentioned niobium-tantalum tailings sample into a 2000mL glass beaker, adding 500mL of deionized water, stirring once every 30min, stirring intermittently to leach the free uranium in the tailings, filtering after continuous leaching for 2h, to obtain Uranium-containing leaching solution and solid slag; add 500mL deionized water and 10mL concentrated sulfuric acid to the solid slag, stir once every 30min, continuously leaching for 3h, and filter to obtain uranium-containing leaching solution and solid slag; repeat the previous step 8 times and measure the solid The content of uranium in the slag is less than 82ug / g, and the content of uranium in the 8th sulfuric acid leaching solution is less than 100ug / mL. At this time, the leaching rate of uranium is greater than 90%. The uranium-containing clear liquid is combined for the extraction of uranium in the next step; the leaching solution with a concentration lower ...

Embodiment 2

[0026] The operating condition of embodiment 2 and step are with embodiment 1, and its difference is:

[0027] (1) The deionized water in step one is 1000mL, and the concentrated sulfuric acid is 90mL; after 4 times of leaching, the content of uranium in the solid slag is less than 82ug / g, and the leaching rate of uranium is greater than 90%.

[0028] (2) add 60mL extractant and extract in step 2, extractant consists of 3% two (2-ethylhexyl) phosphonic acid, 3% nonanol and 94% sulfonated solvent kerosene, extraction compared to (O / W): 1 / 5, shake the separatory funnel vigorously for 10 minutes, place it for clarification for 10 minutes, and measure U<0.005g / L in the inorganic phase after 5-stage extraction operation.

[0029] (3) Use 2% H in step three 2 SO 4 Solution 100mL washes twice; Back extraction with 5% ammonium carbonate again, back extraction ratio (O / W) is 2 / 1; Vigorously shake separatory funnel 20min during back extraction, place clarification 30min, back extractio...

Embodiment 3

[0033] The operating condition of embodiment 3 and step are with embodiment 1, and its difference is:

[0034] (1) The deionized water added in step one is 1000mL, and the concentrated sulfuric acid is 50mL; through 6 times of leaching, the content of uranium in the solid slag is less than 82ug / g, and the leaching rate of uranium is greater than 90%.

[0035] (2) Add 40mL to step 2 for extraction, the extractant consists of 8% bis(2-ethylhexyl)phosphonic acid, 2% nonanol and 90% sulfonated solvent kerosene, place it for clarification for 50min, after 6-stage extraction operation It is measured that U<0.005g / L in the inorganic phase.

[0036] (3) Use 2% H in step three 2 SO 4 Solution 100mL washes twice; Back extraction with 15% ammonium carbonate again, back extraction ratio (O / W) is 8 / 1; Vigorously shake separatory funnel 15min during back extraction, place clarification 90min; Back extraction series is Grade 5, the extraction recovery rate is greater than 95%.

[0037] (...

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 relates to a method for extracting uranium from uranium-contained niobium-tantalum leached tailings, which comprises the steps of sulfuric acid leaching, extraction, back extraction, purification, extraction and purification, back extraction and the like. Compared with the prior art, the method for extracting the uranium from the uranium-contained niobium-tantalum leached tailings is capable of reducing the raw material consumption; pretreatment processes of exploitation, mineral separation and the like are not needed; and in a practical process, energy consumption is reduced, the process problem of extracting the uranium from complicated substrates is solved, and a qualified uranium product is successfully manufactured.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for extracting uranium from uranium-containing niobium and tantalum leaching tailings. Background technique [0002] The development of the economy has promoted the demand for energy, and nuclear power has been paid more and more attention as a clean energy source, thus increasing the demand for nuclear fuel. At present, the development of uranium in China is only focused on the development of conventional uranium ore, and the process of preparing ammonium diuranate from pure uranium ore has been industrialized. Facing the current situation of energy shortage and uranium resource shortage, the technology of extracting uranium from unconventional uranium resources has begun to attract attention. [0003] Uranium is usually associated with niobium and tantalum, and niobium and tantalum concentrates contain a certain concentration of uranium, and the content of uranium ...

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 Applications(China)
IPC IPC(8): C22B7/00C22B60/02C22B3/08C22B3/40
CPCY02P10/20
Inventor 郭冬发李子颖李伯平曾青云武朝晖张彦辉王志明夭华
Owner BEIJING RES INST OF URANIUM GEOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com