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Method for recovering vanadium from vanadium-containing underflow slag

A technology for underflow slag and vanadium slag is applied in the field of recovering vanadium from vanadium-containing materials and recovering vanadium, which can solve the problems that have not yet been seen, and achieve the effects of high vanadium recovery rate, low material consumption and short process flow.

Inactive Publication Date: 2020-04-03
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no relevant report on using the liquid phase of vanadium slag acidic vanadium precipitation to leach and recover vanadium in vanadium-containing underflow slag

Method used

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  • Method for recovering vanadium from vanadium-containing underflow slag

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Effect test

Embodiment 1

[0038] Embodiment 1 adopts the inventive method to reclaim vanadium from vanadium-containing underflow slag

[0039] Take 300mL of the supernatant at 65°C, add the underflow slag according to the liquid-solid ratio of 2:1, ml / g, stir at 90°C for 65min, filter, and send out the residue. : vanadium=1.5:1 (mass ratio) adds ammonium sulfate, adds sulfuric acid to adjust pH=2.2, heats 80min at 95 ℃, precipitates to obtain ammonium polyvanadate, filters, washes, and is calcined and melted after drying to obtain the vanadium pentoxide product, reaching 98-grade flake vanadium quality requirements, the recovery rate of vanadium in the whole process is 90%.

Embodiment 2

[0040] Embodiment 2 adopts the inventive method to reclaim vanadium from vanadium-containing underflow slag

[0041] Take 100mL of the supernatant at 80°C, add the underflow slag according to the liquid-solid ratio of 3:1, ml / g, stir at 80°C for 70min, filter, and send out the residue. : Vanadium=2:1 (mass ratio) adds ammonium sulfate, adds sulfuric acid to adjust pH=2.2, heats 90min at 90 ℃, precipitates to obtain ammonium polyvanadate, filters, washes, and calcines after drying to obtain vanadium pentoxide product, reaches 98 The quality requirements of vanadium powder are high, and the recovery rate of vanadium in the whole process is 92%.

Embodiment 3

[0042] Embodiment 3 adopts the inventive method to reclaim vanadium from vanadium-containing underflow slag

[0043] Take 400mL of the supernatant at 85°C, add the underflow slag according to the liquid-solid ratio of 3:1, ml / g, stir at 75°C for 80min, filter, and send out the residue. : Vanadium=3:1 (mass ratio) adds ammonium sulfate, adds sulfuric acid to adjust pH=2.4, heats 85min under 95 ℃, and precipitation obtains ammonium polyvanadate, filters, washes, and after drying, calcines and melts to obtain the vanadium pentoxide product, reaching The quality requirements of 99-grade flake vanadium, the recovery rate of vanadium in the whole process is 94.2%.

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Abstract

The invention relates to a method for recycling vanadium from vanadium-containing underflow slag, and belongs to the technical field of recycling the vanadium from vanadium-containing materials. The invention provides the method for recovering the vanadium from the vanadium-containing underflow slag, the method comprises the following steps of collecting the liquid phase of acid vanadium precipitation of vanadium slag, adding the vanadium-containing underflow slag into the liquid phase according to the liquid-solid ratio of (2-4) to 1 ml / g, sufficiently leaching at 70 - 90 DEG C, carrying outsolid-liquid separation, and collecting leachate to obtain vanadium-containing solution. The invention further provides a method for preparing a vanadium oxide product from the vanadium-containing solution. According to the method for recycling the vanadium from the vanadium-containing underflow slag, the vanadium-containing underflow slag is leached by utilizing the liquid phase of the acid vanadium precipitation of the vanadium slag so that not only can a high-purity vanadium oxide product be prepared, the vanadium recovery rate is high, but also the cyclic utilization of acid vanadium precipitation waste liquid is realized; and compared with an existing recovery method, the method has the advantages of being low in material consumption, short in process, low in cost and the like.

Description

technical field [0001] The invention relates to a method for recovering vanadium from vanadium-containing underflow slag, and belongs to the technical field of recovering vanadium from vanadium-containing materials. Background technique [0002] Industrially, vanadium extraction from vanadium slag mainly goes through the technological process of sodium roasting, water immersion, impurity removal, and vanadium precipitation. The impurity removal of vanadium-containing leaching solution is mainly to remove silicon and phosphorus in the leaching solution, providing support for obtaining high-quality vanadium products. Calcium chloride solution or aluminum sulfate solution is usually used in the leaching solution to remove silicon and phosphorus. However, during the impurity removal process, vanadium will form precipitates with calcium or aluminum, and enter the underflow slag after impurity removal. The vanadium content can usually reach 10~ 20%. In order to improve the utiliz...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B34/22C01G31/02
CPCC01G31/02C22B7/007C22B34/22Y02P10/20
Inventor 韦林森李明汪超李千文舒丽冉俊潘少彦薛平
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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