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Method for extracting vanadium from production flow of aluminum oxide

A production process and alumina technology, applied in the field of vanadium extraction, can solve the problems of adverse production impact, long production process, low vanadium adsorption rate, etc., and achieve the effects of reducing vanadium extraction cost, reducing impact and simple operation.

Inactive Publication Date: 2014-08-06
JIANGXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since this process first adopts precipitation method and then undergoes solvent extraction / ion exchange, the production process is long, and the formation of calcium vanadate precipitation will also entrain a small amount of aluminum, resulting in the loss of aluminum and high cost
[0007] Ⅲ. Ion exchange-barium salt precipitation method. This method mainly adopts the method of resin adsorption to recover the gallium in the mother liquor of the seed fraction and at the same time recovers the vanadium. However, the adsorption rate of the resin to gallium is high, and the adsorption rate of vanadium is generally about 65%. , the desorption solution is added with barium oxide, and vanadium is precipitated in the form of barium vanadate. Due to the low adsorption rate of vanadium, a certain amount of vanadium will remain in the alumina production process, which will adversely affect subsequent production.

Method used

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  • Method for extracting vanadium from production flow of aluminum oxide
  • Method for extracting vanadium from production flow of aluminum oxide
  • Method for extracting vanadium from production flow of aluminum oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 1 liter of vanadium with a concentration of 0.523g.l -1 The carbon fraction mother liquor, wherein the total alkali concentration is 130 g l - , the concentrations of other impurities such as Cl, P, Si and Al are 0.58 g·l - , 0.806 g l - , 0.142 g l - , 12.8 g l - . At 20°C, add 15ml of 5% sodium oxalate solution to the mother liquor, stir and complex for 15 minutes; add 25%N263+10%TBP+65%sulfonated Extraction of kerosene composition The organic phase extracts the vanadium-containing complex in the mother liquor, the extraction time is 10 minutes, and the phase separation time is 3 minutes; the extraction results are shown in Table 1.

[0026] Table 1. Extraction results

[0027]

[0028] From the extraction results, the extraction rate of vanadium can reach 100%; most of the impurities such as Cl, P, and Si in the mother liquor can also be extracted, while the extraction rates of Al and C are very low.

[0029] The above-mentioned loaded organic phase wa...

Embodiment 2

[0038] Take 1 liter of vanadium-containing carbon fraction mother liquor, wherein the total alkali concentration is 180 g l - , the vanadium concentration is 3.55g.l - , the concentrations of other impurities such as Cl, P, Si and Al are 0.92 g·l - , 0.68 g l - , 0.235 g l - , 13.41 g l - . At 50°C, add 15ml of 5% sodium potassium tartrate solution to the mother liquor, stir and complex for 30min; add 25%N263+10%TBP+65%sulfur Extraction of kerosene composition The organic phase extracts the vanadium-containing complex in the mother liquor, the extraction time is 25 minutes, the temperature is maintained at 50°C during the extraction period, and the phase separation time is 5 minutes; the extraction results are shown in Table 4.

[0039] Table 4. Results of extraction experiments

[0040]

[0041] Wash the above-mentioned loaded organic phase with distilled water, the washing ratio is O / A=1 / 1, the washing time is 25 min, and the phase separation time is 5 min; the comp...

Embodiment 3

[0049] Take 1 liter of vanadium-containing carbon fraction mother liquor, wherein the concentration of total alkali is 220 g l - , Vanadium concentration is 2.87g.l - , the concentration of other impurities such as Cl, P, Si and Al is 0.75 g·l - , 0.45 g l - , 0.187 g l - , 16.25 g l - . At 80°C, add 15ml of 5% sodium citrate solution to the mother liquor, stir and complex for 10 minutes; add 55% TOMAC + 10% TBP + 35% according to the ratio of O / A=1 / 1 Extraction of sulfonated kerosene composition The organic phase extracts the vanadium-containing complex in the mother liquor. The extraction time is 20 minutes. During the extraction period, the temperature is maintained at 50 ° C and the phase separation time is 8 minutes. The extraction results are shown in Table 7.

[0050] Table 7. Results of extraction experiments

[0051]

[0052] Wash the above loaded organic phase with distilled water, the washing ratio is O / A=1 / 3, the washing time is 20 min, and the phase separ...

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Abstract

The invention discloses a new method for extracting vanadium from a production flow of aluminum oxide. The method comprises the following steps of: firstly, complexing vanadium in a carbon mother solution by using a complexing agent; then, extracting the vanadium-containing complex by using a modified amine extractant, wherein a sodium vanadate solution can be obtained by performing reverse extraction on a loaded organic phase by using a Na2CO2+NaOH solution, and the sodium vanadate solution is crystallized and then calcined to obtain the vanadium pentoxide of which the purity is more than 99%; depositing vanadium by directly using a reverse extraction solution without purification; and returning extraction raffinate to the production flow directly. By adopting the method, a process of crystallizing first and then extracting vanadium in the conventional process is improved, the extraction reaction speed is high, the time is short, and the efficiency is improved; and vanadium is separated from impurities such as Si and P in the process of extraction and washing, and the recovery rate of vanadium is more than 99%.

Description

technical field [0001] The invention relates to the vanadium extraction technology in the alumina production process, in particular to a method for extracting vanadium in a carbon-separated mother liquor by a full-wet method. Background technique [0002] Vanadium is a very important rare metal, which is widely used in various fields of the national economy and defense industry, so its price has been rising year by year. However, the distribution of vanadium in nature is quite scattered, and generally does not form a separate deposit, but mainly exists in the form of associated ore, so vanadium is mainly recovered as a by-product in various metallurgical processes. The recovery of vanadium in the alumina production process is an important way to produce vanadium. [0003] Bauxite for alumina production usually contains a certain amount of vanadium-containing minerals, and about 30%-40% of these minerals will be converted to sodium vanadate (Na 3 VO 4 ) form into the sodiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/22C22B3/38
CPCY02P10/20
Inventor 陈金清肖承玉熊家任林凯
Owner JIANGXI UNIV OF SCI & TECH
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