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

Method for recovering scandium

A recovery method and process technology, which is applied to the field of effective recovery of scandium contained in nickel oxide ore, and can solve the problems of low grade and non-industrial recovery

Inactive Publication Date: 2015-10-21
SUMITOMO METAL MINING CO LTD
View PDF8 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low grade of nickel in nickel oxide ore, nickel oxide ore has not been used as nickel raw material in industry for a long time.
Therefore, there has been basically no research on the industrial recovery of scandium from nickel oxide ore.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for recovering scandium
  • Method for recovering scandium
  • Method for recovering scandium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] is adsorbed on the removal of the chromium on the chelating resin

[0119] [Leaching process S1]

[0120] First, nickel oxide ore and concentrated sulfuric acid are put into a pressure cooker, and a slurry containing valuable metals such as scandium and nickel is formed after 1 hour at 245 ° C. From the slurry, solid-liquid separation containing the above-mentioned The leaching solution and leaching residue of valent metals.

[0121] [Neutralization process S2]

[0122] Then, calcium carbonate is added to the leaching solution to adjust the pH value to a range of 1 to 4 to obtain a neutralized precipitate and a neutralized solution. The neutralized solution contains valuable metals such as scandium and nickel, and the neutralized precipitate contains most impurities including aluminum.

[0123] [Vulcanization process S3]

[0124] Next, hydrogen sulfide gas is blown into the neutralized solution to separate nickel, cobalt, and zinc from the sulfided solution in the fo...

Embodiment 2

[0156] Re-adsorption of scandium eluate obtained in scandium elution step S43

[0157] The pH value of the scandium eluent obtained in Example 1 was adjusted to 3, and then a reducing agent was added so that the oxidation-reduction potential was calculated using the silver-silver chloride electrode as the value of the reference electrode to be -200mV or less, Then adjust the pH value to the range of 1-2.5 with sulfuric acid.

[0158] Then, under the same liquid-through conditions as in Example 1, the scandium eluent is passed through in the chelating resin of the same type as the above-mentioned Example 1 of 4mL, and then, adopting the same concentration as in Example 1 is 0.1N , 1N, and 3N sulfuric acid solutions were respectively washed and eluted to obtain a re-adsorbed aluminum washing solution, a re-adsorbed scandium eluent, and a re-adsorbed chromium eluent.

[0159] In the composition of the re-adsorbed aluminum cleaning liquid, Al was 3 mg / l, Sc was 0.24 g / l, and the...

Embodiment 3

[0163] Purification of scandium eluent

[0164] The scandium elution step S43 was repeated several times to refine the scandium eluent. That is, the scandium eluent obtained in the scandium elution step S43 was subjected to the scandium elution step S43 again, and after the scandium concentration was increased, the composition of the scandium eluate was measured again.

[0165] The results at this time are shown in image 3 middle. image 3 The abscissa of represents the number of times the scandium elution step S43 is repeated, and the ordinate represents the concentration of scandium contained in the scandium eluent after repetition. also, image 3 The dashed line is an approximate straight line based on the least squares method. Depend on image 3 It can be seen that the more times the scandium elution step S43 is repeated, the higher the recovered scandium concentration is, but even if a large number of excessive repetitions, the degree of rise of the recovered scand...

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
electric potential / voltageaaaaaaaaaa
electric potential / voltageaaaaaaaaaa
extraction efficiencyaaaaaaaaaa
Login to View More

Abstract

The present invention effectively recover high-grade scandium from nickel oxide ores. The present invention includes a leaching step (S1) for charging nickel oxide ores and sulfuric acid into a pressurized vessel to cause solid-liquid separation of a leachate and a leaching residue under high temperature and high pressure, a neutralizing step (S2) for adding a neutralizing agent to the leachate to obtain a neutralized precipitate and a neutralized liquid, a sulfidizing step (S3) for adding a sulfidizing agent to the neutralized liquid to separate a nickel sulfide and a sulfidized liquid, an ion exchange step (S4) for bringing the sulfidized solution into contact with a chelate resin to adsorb Sc onto the chelate resin to obtain a Sc eluent, a solvent extraction step (S6) for bringing the Sc eluent into contact with an extracting agent to obtain a stripping solution, a Sc precipitation step (S7) for adding a neutralizing agent or oxalic acid to the stripping solution to obtain a precipitate, and a calcination step (S8) for drying and calcining the precipitate to obtain scandium oxide.

Description

technical field [0001] The invention relates to a method for recovering scandium, and more specifically, relates to a method for effectively recovering scandium contained in nickel oxide ore by using chelating resin and solvent extraction. Background technique [0002] Scandium is extremely useful as an additive to high-strength alloys and as an electrode material for fuel cells. However, it has not been widely used due to low production volume and high price. [0003] Nickel oxide ores such as laterite and limonite contain trace amounts of scandium. However, due to the low grade of nickel contained in nickel oxide ore, nickel oxide ore has not been used as a nickel raw material in industry for a long time. Therefore, there has been basically no research on the industrial recovery of scandium from nickel oxide ore. [0004] However, in recent years, the HPAL process has been continuously applied. In this process, nickel oxide ore and sulfuric acid are put into a pressuriz...

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): C22B59/00
CPCC22B3/42C22B3/08C22B23/043C22B59/00Y02W30/54Y02P10/20C22B3/26C22B3/22C22B3/44
Inventor 尾崎佳智永仓俊彦
Owner SUMITOMO METAL MINING CO LTD
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