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Method for extracting scandium

An extraction and leaching technology, applied in the field of metallurgy, can solve the problems of failure to realize industrialization, high scandium recovery efficiency and recovery cost, low scandium content, etc., and achieve the effects of low production cost, high scandium recovery rate and high purity.

Inactive Publication Date: 2010-09-08
攀枝花聿明科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Researchers have carried out a lot of research work on extracting scandium from titanium dioxide waste acid, blast furnace slag and titanium beneficiation tailings. Due to the low scandium content of the raw materials used, the recovery efficiency and cost of scandium are high, and industrialization has not been realized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 adopts the inventive method to extract scandium

[0023] The high-titanium slag obtained by smelting scandium-containing vanadium-titanium magnetite concentrate, and the high-titanium slag is chlorinated to obtain titanium tetrachloride and chloride slag. Grind the chlorinated slag with a particle size of ≤325 mesh. Sulfuric acid is used as the leaching reagent, and the concentration of sulfuric acid is controlled at: 40wt%; the mass ratio of leaching solid to liquid is controlled at: 1:3; the leaching temperature is controlled at: 80°C; and the leaching time is controlled at: 8h.

[0024] Filter the leaching liquid, use CA-100 as the extraction reagent, and control the concentration of the extraction agent at: 0.008mol.L -1 ;Comparison is controlled at: O / A=1:2; The concentration of the extraction stock solution is controlled at: 100mg / L -1 .

[0025] The organic phase separated after extraction is back-extracted, and NaOH solution is used as the stripp...

Embodiment 2

[0027] Embodiment 2 adopts the inventive method to extract scandium

[0028] The high-titanium slag obtained by smelting scandium-containing vanadium-titanium magnetite concentrate, and the high-titanium slag is chlorinated to obtain titanium tetrachloride and chloride slag. Grind the chlorinated slag with a particle size of ≤325 mesh. Sulfuric acid is used as the leaching reagent, the concentration of sulfuric acid is controlled at 35wt%, the mass ratio of leaching solid to liquid is 1:4, the leaching temperature is 85°C, and the leaching time is 10h.

[0029] Filter the leaching liquid, use CA-100 as the extraction reagent, and control the concentration of the extraction agent at: 0.009mol.L -1 ;Compared to control: O / A=1 / 3;The concentration of the extraction stock solution is controlled at: 90mg / L -1 .

[0030] The organic phase separated after extraction is back-extracted, and NaOH solution is used as the stripping agent, and the concentration of the stripping agent is ...

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PUM

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Abstract

The invention relates to a method for extracting scandium, belonging to the field of metallurgy. The invention solves a technical problem of providing the method for extracting the scandium, which has the advantages of high scandium reclamation rate and low cost and can meet the requirement of industrial production. The method for extracting the scandium comprises the following steps: a, chloridizing a scandium-containing raw material to obtain chlorination residue; b, leaching the chlorination residue in a leaching solution to ensure that the scandium is completely dissolved in the leaching solution, and filtering the solution to obtain filtrate; c, extracting the filtrate by adopting extracting agent CA-100, namely sec-nonylphenoxy acetic acid, and separating the filtrate to obtain organic phase; d, back extracting the organic phase by adopting NaOH solution, filtering the solution to obtain Sc(OH)3 precipitate; and e, dissolving the Sc(OH)3 precipitate by using HCl solution, adding oxalic acid solution after the solution is heated and boiled, filtering the solution to obtain scandium oxalate precipitate, and calcining the scandium oxalate precipitate to obtain scandium oxide. The method provides a new option for scandium extraction, and has wide application prospect.

Description

technical field [0001] The invention relates to a method for extracting scandium and belongs to the field of metallurgy. Background technique [0002] Scandium and its compounds have many excellent properties. Scandium is widely used in national defense, metallurgy, chemical industry, glass, aerospace, nuclear technology, laser, electronics, computer power supply, superconductivity and medical science and other fields. High-purity scandium oxide can be used in electron emission materials, superconducting materials, solar cell materials, etc. It has extremely high application value. [0003] The content of scandium in the earth's crust is 6×10 -4 ~6×10 -3 , is a typical dispersed element, only scandium yttrium stone, phosphorus scandium ore (water phosphorus scandium stone) and silicon phosphorus scandium stone produce very few independent scandium minerals, so scandium has no independent deposits, and scandium is often in the form of isomorphic impurities The form exist...

Claims

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Application Information

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IPC IPC(8): C22B61/00C22B7/04C22B3/08C22B3/26
CPCY02P10/20
Inventor 李亮武昭妤孙艳彭富昌
Owner 攀枝花聿明科技有限责任公司
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