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Treatment method of wastewater containing vanadium

A treatment method and wastewater technology are applied to recover valuable elements from chromium wastewater, and from the field of vanadium-containing and vanadium-containing wastewater treatment, it can solve the problems of cumbersome adsorption method steps, unfavorable popularization and application, increase process flow, etc., and achieve high-efficiency separation and recycling, avoiding preparation steps, saving process flow

Active Publication Date: 2019-08-09
承德燕北冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although the above method has realized the effective recovery of vanadium and chromium in the vanadium-containing solution to a certain extent, there are still some problems: after the direct reduction method precipitates, vanadium and chromium exist in the slag together in the form of precipitates, which need to be further separated; The method takes a long time, and the recovery rate of vanadium is only about 75%; the steps of the adsorption method are cumbersome, which increases the process flow, which is not conducive to popularization and application

Method used

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Embodiment 1

[0037] The present embodiment provides a kind of treatment method of vanadium-containing waste water, the concentration of hexavalent chromium in the vanadium-containing waste water is 0.18g / L, the concentration of pentavalent vanadium 0.25g / L, described method comprises the following steps:

[0038] (1) add ferrous sulfate that makes the theoretical amount 1.1 times of the complete reduction of hexavalent chromium ion in the waste water to react in the vanadium-containing waste water;

[0039] (2) After the hexavalent chromium in the solution is completely reduced, use sulfuric acid to adjust the pH of the solution to 4, and at 50°C, stir at a speed of 600r / min to react, and after the reaction time of 50min, adjust the pH of the solution to 6.2 , continue to stir until complete reaction, then filter the solution to obtain ferric vanadate precipitate and chromium-containing solution;

[0040] (3) Utilize aminophosphoric acid resin to adsorb the chromium-containing solution obtai...

Embodiment 2

[0043] The present embodiment provides a kind of treatment method of vanadium-containing wastewater, the concentration of hexavalent chromium in the vanadium-containing wastewater is 0.15g / L, the concentration of pentavalent vanadium is 0.30g / L, and described method comprises the following steps:

[0044] (1) add ferrous sulfate that makes the theoretical amount 1.05 times of the complete reduction of hexavalent chromium ion in the waste water to react in the vanadium-containing waste water;

[0045] (2) After the hexavalent chromium in the solution is completely reduced, adopt sulfuric acid to adjust the pH of the solution to be 3.5, and at 45°C, react with stirring at a speed of 800r / min. After the reaction time of 40min, adjust the pH of the solution to be 6 , continue to stir until complete reaction, then filter the solution to obtain ferric vanadate precipitate and chromium-containing solution;

[0046] (3) Utilize aminophosphoric acid resin to adsorb the chromium-contain...

Embodiment 3

[0049] The present embodiment provides a kind of treatment method of vanadium-containing wastewater, the concentration of hexavalent chromium in the vanadium-containing wastewater is 0.16g / L, the concentration of pentavalent vanadium is 0.19g / L, and described method comprises the following steps:

[0050] (1) add ferrous sulfate that makes the theoretical amount 1 times of the complete reduction of hexavalent chromium ion in the waste water to react in the vanadium-containing waste water;

[0051] (2) After the hexavalent chromium in the solution is completely reduced, use sulfuric acid to adjust the pH of the solution to 4.5, and at 40°C, stir at a speed of 650r / min to react, and after the reaction time of 60min, adjust the pH of the solution to 6.5 , continue to stir until complete reaction, then filter the solution to obtain ferric vanadate precipitate and chromium-containing solution;

[0052] (3) Utilize aminophosphoric acid resin to adsorb the chromium-containing solutio...

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Abstract

The invention provides a treatment method of waste water containing vanadium. The method comprises the steps that ferrous sulfate is added into the waste water containing the vanadium for a reaction;after the reaction is completed, the pH of the mixed solution is adjusted to be 3-4.5, heating and stirring are conducted for a reaction, after some time, the pH of the mixed solution is adjusted to be 6-6.5, stirring is continued, after the reaction is completed, solid-liquid separation is conducted, and ferric vanadate precipitate and a solution containing chromium are obtained; phosphoramidic acid resin is utilized for adsorbing the solution containing the chromium, after adsorption is completed, the phosphoramidic acid resin is subjected to desorption, and the purified solution containingthe chromium is obtained. By improving the technology and controlling conditions, reduction of hexavalent chromium and preparation of polyferric sulfate are conducted in the same reaction system, efficient separation and resource recovery for the vanadium and chromium in the waste water containing the vanadium are achieved to the greatest extent, the recovery rate of the vanadium element reaches 90% or above, and the recovery rate of the chromium element reaches 93% or above. The whole reaction is continuous, the operation is simple, the technology process is shortened, and the preparation method has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of waste water treatment and recovery of valuable elements, in particular to a method for treating waste water containing vanadium, in particular to a method for recovering valuable elements from waste water containing vanadium and chromium. Background technique [0002] Vanadium has the title of "monosodium glutamate of modern industry", and it is an indispensable and important material for the development of modern industry, modern national defense and modern science and technology. From a global perspective, the consumption of vanadium in the iron and steel industry accounts for 85% of its total production. At the same time, the application of vanadium in chemical industry, vanadium battery, aerospace and other fields is also expanding, and has a good development prospect. [0003] At present, 98% of the world's known vanadium reserves are produced in vanadium-titanium magnetite, so the coexistence of va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C01G49/00C22B7/00C22B34/22C22B34/32C02F101/20C02F101/22
CPCC02F9/00C01G49/00C22B7/006C22B34/32C22B34/22C02F2101/20C02F2101/22C02F1/66C02F1/72C02F1/62C02F1/285C02F1/70
Inventor 王正五
Owner 承德燕北冶金材料有限公司
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