Method for extracting vanadium from high-acid leachate of vanadium slag

A high-acid leaching and leaching solution technology, which is applied in the field of vanadium extraction and extraction, can solve the problems of high acid and alkali consumption, loss of valence metals, long process flow, etc., and achieve the effect of high selectivity, easy operation, and good extraction performance

Inactive Publication Date: 2018-08-24
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for extracting and extracting vanadium from vanadium slag high-acid leaching solution, which overcomes the existing technical problems of extracting vanadium from vanadium-containing acid leaching solution, which consumes a lot of acid and alkali, has a long process flow, and loses valuable metals. , while the process is simple and efficient, and the operation is easy, the consumption of acid and alkali is reduced, and industrial application is realized

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  • Method for extracting vanadium from high-acid leachate of vanadium slag
  • Method for extracting vanadium from high-acid leachate of vanadium slag
  • Method for extracting vanadium from high-acid leachate of vanadium slag

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Embodiment 1

[0033] Add an oxidizing agent to the vanadium-containing high-acid leach solution, and then stir for 30 minutes to obtain an oxidized leach solution; the oxidant is sodium chlorate, and the initial potential of the vanadium-containing high-acid leach solution is 449mV, and the potential of the material after adding the oxidant and stirring is 1087mV; The vanadium-containing high-acid leach solution contains vanadium 3g / L, iron 10g / L, and free hydrogen ions 0.1mol / L;

[0034] The oxidized leachate is mixed with the extraction organic solution, and a first-stage extraction is carried out to obtain a loaded organic phase and a raffinate; the extraction organic solution is formed by mixing an oxime chelating extraction agent and an organic solvent, and a modifier is added; the The oxime chelating extractant is prepared by mixing an aldoxime extractant and a ketoxime extractant at a molar ratio of 1:1; the oxime chelate extractant accounts for 5% of the total volume in the extracted...

Embodiment 2

[0040] Method is with embodiment 1, and difference is:

[0041] (1) vanadium-containing high-acid leaching solution contains vanadium 15g / L, iron-containing 65g / L, and free hydrogen ion 1.2mol / L; the oxidizing agent is sodium hypochlorite, and the potential of the material after adding the vanadium-containing high-acid leaching solution to oxidant stirring is 1430mV; stirring time 40min;

[0042] (2) Carry out 2 grades of extraction; Extraction organic solution oxime chelating extractant accounts for 10% of total volume, modifier accounts for 4% of oxime chelating extraction agent and organic solvent total volume; Organic solvent is No. 200 solvent oil; the modifier is 2-octanol; the extraction temperature is 35°C, the volume ratio of the oxidized leachate to the extracted organic solution is 2 / 3 during each stage of extraction, the extraction time of each stage is 40min, and the phase separation time is 70s;

[0043] (3) The concentration of the sodium carbonate solution is ...

Embodiment 3

[0048] Method is with embodiment 1, and difference is:

[0049] (1) The vanadium-containing high-acid leach solution contains vanadium 5g / L, iron 55g / L, and free hydrogen ions 3.16mol / L; the oxidant is potassium permanganate, and the potential of the material after the vanadium-containing high-acid leach solution is added to the oxidant and stirred is 1364mV ; Stirring time 50min;

[0050] (2) Carry out 3 grades of extraction; Extraction organic solution oxime chelating extractant accounts for 15% of total volume, modifier accounts for 3% of oxime chelating extraction agent and organic solvent total volume; Organic solvent is No. 260 solvent oil; modifier is nonylphenol; extraction temperature is 30°C, the volume ratio of oxidized leachate to extracted organic solution is 1 during each stage of extraction, the extraction time of each stage is 30min, and the phase separation time is 60s;

[0051] (3) The concentration of the sodium carbonate solution is 1.0mol / L, the stripping...

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Abstract

A method for extracting vanadium from high-acid leachate of vanadium slag is performed according to the following steps that firstly, an oxidizing agent is added into the vanadium-containing high-acidleachate to be stirred, and the electric potential of materials is 1000-1500 m; secondly, mixing with an extracting organic solution is performed, extraction from the first level to the fourth levelis performed, and a loaded organic phase and extraction raffinate are obtained; thirdly, the loaded organic phase is subjected to reverse extraction through a sodium carbonate solution; fourthly, after sulfuric acid is added in a reverse extraction solution, ammonium chloride is added in, and a precipitated solid phase is calcined so that vanadium pentoxide can be obtained; and fifthly, NaCl is added in the extraction raffinate, acid adjusting is performed, and iron extracting is performed with a TBP kerosene extraction agent. The method can solve the problem that during vanadium extraction ofa traditional acidic phosphorous type extraction agent, acid and alkali consumption is large, and the procedure is long; and the purpose of efficient synergistic extraction of vanadium in the high-acid leachate is also achieved, and in the direct vanadium precipitating and calcining process of subsequent alkaline reverse extraction, high-purity vanadium pentoxide is obtained.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metallurgy, in particular to a method for extracting vanadium from vanadium slag high-acid leaching solution. Background technique [0002] Vanadium is an important strategic resource. From a global perspective, except for a few countries that use vanadium ore and crude oil as raw materials for extracting vanadium, most of the vanadium comes from vanadium-containing iron ores, and about 85% of the raw materials for vanadium extraction in my country come from the smelting process of vanadium minerals converter vanadium slag. [0003] At present, the techniques for extracting vanadium from vanadium slag in China mainly include (I) sodium roasting-water immersion process; (II) calcification roasting-acid leaching-extraction process; (Ⅲ) blank roasting-alkali leaching-ion exchange process; (IV) direct Acid leaching - extraction process, etc.; due to sodium roasting - water leaching process will pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/30C22B3/44C22B34/22
CPCC22B3/44C22B7/007C22B34/22C22B3/30Y02P10/20
Inventor 张廷安张莹吕国志豆志河张伟光
Owner NORTHEASTERN UNIV
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