Method for extracting and recycling titanium from acid solution

A technology of acid solution and recovery of titanium, which is applied in the field of mineral processing engineering, can solve the problems of difficult stripping of titanium, and achieve the effect of complete separation, simple process flow and low production cost

Active Publication Date: 2018-05-15
贵州鑫亚矿业有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the related art, the present invention proposes a method for extracting and recovering titanium from acid solution, which can solve the problem of selective separation and enrichment of titanium in acid solution, as well as the difficult back-extraction of titanium in other extraction processes. The problem is to realize the recovery of low concentration titanium in the acid solution, and to enrich the low concentration scandium contained in the solution into the titanium slag

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  • Method for extracting and recycling titanium from acid solution

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Effect test

Embodiment 1

[0032] A scandium-rich anatase in Guizhou containing TiO 2 5.00%, including Sc 2 o 3 120 g / t. Titanium is mainly produced in the form of fine-grained anatase wrapped in silicate and quartz, and the particle size is extremely fine. Secondly, it occurs in limonite in the form of isomorphism, which is an extremely difficult ore. Scandium element mainly occurs in clay minerals such as kaolinite and sericite, and secondarily occurs in limonite and anatase. The ore is leached with sulfuric acid in two stages. 2 SO 4 Content 423.9 g / L, containing TiO 2 10.02 g / L, Sc 2 o 3 15.92 mg / L, TFe 29.91g / L. Such as figure 1 As shown, titanium is extracted and extracted from the leaching solution. In terms of volume percentage, 15% combined extractant (P204:N1923=2.5:1), 5% 2-octanol, 80% 260 # Kerosene, compared with O / A=2:1, three-stage countercurrent extraction of titanium, the extraction temperature is 10°C, the extraction time is 30min, titanium is selectively extracted from th...

Embodiment 2

[0034] A titanium dioxide factory in Sichuan has an annual output of 100,000 tons of titanium dioxide and 900,000 tons of titanium dioxide waste acid, which contains TiO 2 7.48 g / L, TFe 31 g / L, H 2 SO 4 386g / L. Such as figure 1As shown, the extraction and separation of titanium from the titanium dioxide waste acid, by volume percentage, using 20% ​​combined extractant (P507:N235=3:1), 5% 2-octanol, 75% 260 # Kerosene, compared with O / A=1:1, four-stage cross-flow extraction of titanium, the extraction temperature is 20°C, the extraction time is 18min, titanium is selectively extracted from the solution containing titanic acid, and iron, aluminum, Magnesium and other impurity ions are separated to obtain the titanium-loaded organic phase and the titanium raffinate. The titanium-loaded organic phase is washed in two-stage countercurrent with O / A=3:1, 2 mol / L sulfuric acid solution, and then 2 mol / L NaOH solution, compared with O / A=3:1, one-stage stripping of titanium, the s...

Embodiment 3

[0036] Smelting slag of a vanadium-titanium magnetite in Sichuan, containing TiO 2 is 18.00%, and the HCl content of the leachate obtained by hydrochloric acid leaching is 400 g / L, containing TiO 2 16.18g / L, TFe 18.43g / L. Extraction and separation of scandium and titanium from the leachate, by volume percentage, using 20% ​​combined extractant (P204:N1923=3:1), 5% isoamyl alcohol, 75% 260 # Kerosene, compared to O / A=2:1, three-stage countercurrent extraction of titanium, the extraction temperature is 30 ° C, the extraction time is 5 minutes, titanium is selectively extracted from the solution containing titanic acid, and iron, aluminum, and magnesium in the acid solution Separation of impurity ions, etc., to obtain titanium-loaded organic phase and titanium raffinate, using O / A=2:1, 3 mol / L hydrochloric acid solution for three-stage countercurrent washing of titanium-loaded organic phase, and then using 3 mol / L L NaOH solution, compared with O / A=2:1, one-stage stripping of ...

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Abstract

The invention discloses a method for extracting and recycling titanium from an acid solution. Aiming at the acid solution with lower titanium concentration, organic phosphonate type extractants and amine type extractants are fully utilized and combined to generate a synergistic extraction effect, titanium can be selectively extracted and can be separated from impurity ions such as iron, aluminum and magnesium in the acid solution, an NaOH solution can be used for performing effective back extraction of titanium to obtain back extraction titanium slag, and performing calcination and water washing on the back extraction titanium slag to remove residual NaOH so as to obtain a titanium-rich material in which the content of TiO2 is 65-93%. The method disclosed by the invention solves the problems of selective separation and enrichment of titanium in the acid solution and the problem of difficult back extraction of titanium in other extraction processes, realizes the recycling of titanium with lower concentration in the acid solution, can enable low-concentration scandium contained in the solution to be together enriched into the titanium-rich material, and has the characteristics of simple technological process, high titanium enrichment ratio, thorough separation, low production cost, no pollution, comprehensive recycling of scandium and the like.

Description

technical field [0001] The invention relates to the technical field of mineral processing engineering, in particular to a method for extracting and recovering titanium from an acid solution. Background technique [0002] The main form of titanium in the earth's crust is titanium dioxide and titanate, and it usually coexists with Fe, Ca, Mg, Si, Al, Mn and rare earth elements. According to statistics, there are more than 140 types of titanium minerals, but only as Several types of ilmenite, rutile, white titanium, anatase, brookite and hematite have mining value. While the processing and utilization of titanium-containing minerals and titanium, the extraction and recovery of titanium from solid materials such as ores, tailings and tailings, and acid solutions has important practical significance for the comprehensive utilization of resources and clean production in the titanium industry. The extraction of titanium usually transfers titanium to the liquid phase and extracts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/12C22B3/38C22B3/28
CPCC22B34/1259C22B3/28C22B3/38Y02P10/20
Inventor 高利坤洪志董方
Owner 贵州鑫亚矿业有限公司
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