Green and clean preparation method of vanadium compound

A vanadium compound and green technology, applied in the field of vanadium compound preparation, can solve problems such as endangering human health, affecting water supply, and hidden dangers of living environment safety, and achieve the effect of avoiding pollution and green and clean production

Active Publication Date: 2019-03-01
深圳力合通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main components include V 5+ 、Cr 6+ 、Na + , NH 4 + , SO 4 2- These wastewater will pollute the environment, affect water supply sources, endanger human health, and bring major safety hazards to the living environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] S1 Pulverize 1000g of coal gangue raw material (containing 1.0% vanadium), put it into a ball mill to make 200 mesh particles, then add 10g of 1% barite, and mix.

[0033] S2 is burned at 800°C for 2 hours, oxidized and burned in the air for 6 hours, and the product is leached with water after cooling;

[0034] S3 to S2 step leaching solution using 717 anion exchange resin to adsorb VO 4 3- , VO 4 3- Adsorption and enrichment on 717 anion exchange resin, pH 3.0, Ba 2+ Enter the solution, remove barium and remove impurities and purify;

[0035]S4 adds the strong alkali solution (10%) containing sodium hydroxide in the solution that S3 step obtains, makes it fully dissolve, makes the solution be in alkaline state all the time, strips the vanadium element and obtains VO 4 3- , adjust the pH to 13 to obtain a sodium vanadate solution containing about 10% vanadium, and then filter to remove a small amount of Fe that is insoluble in alkali 3+ , Mn 2+ 、Cr 3+ 、Ni 2+ 、...

Embodiment 2

[0040] S1 Pulverize 200g of vanadium-containing mud (containing 5% vanadium), put it into a ball mill to make 200-mesh particles, then add 12g of barium nitrate, mix and stir evenly.

[0041] S2 is burned at 800°C for 3 hours, ventilated and oxidized in the air for 6 hours, and the product is leached with water after cooling;

[0042] S3 to S2 step leaching solution using 717 anion exchange resin to adsorb VO 4 3- , VO 4 3- Adsorption and enrichment on 717 anion exchange resin, pH 3.5, Ba 2+ Enter the solution, remove barium and remove impurities and purify;

[0043] In S4, add 10% ammonia water into the solution obtained in step S3 to fully dissolve it so that the solution is always in an alkaline state, and strip the vanadium element to obtain VO 4 3- , adjust the pH to 13 to obtain a sodium vanadate solution containing about 10% vanadium, and then filter to remove a small amount of Fe that is insoluble in alkali 3+ , Mn 2+ 、Cr 3+ 、Ni 2+ 、Cu 2+ , SiO 2 and other ...

Embodiment 3

[0048] S1 Pulverize 350g of vanadium slag (containing 3% vanadium), put it into a ball mill to make 200 mesh particles, then add 8g of barite, mix and stir evenly.

[0049] S2 is ventilated and oxidized in air at 850°C for 11 hours, and the cooled product is leached with clean water;

[0050] S3 to S2 step leaching solution using 432 anion exchange resin to adsorb VO 4 3- , VO 4 3- Adsorption and enrichment on 432 anion exchange resin, pH 3.5, Ba 2+ Enter the solution, remove barium and remove impurities and purify;

[0051] In S4, add 10% ammonia water into the solution obtained in step S3 to fully dissolve it so that the solution is always in an alkaline state, and strip the vanadium element to obtain VO 4 3- , adjust the pH to 13 to obtain a sodium vanadate solution containing about 10% vanadium, and then filter to remove a small amount of Fe that is insoluble in alkali 3+ , Mn 2+ 、Cr 3+ 、Ni 2+ 、Cu 2+ , SiO 2 and other impurities.

[0052] S5 To the solution af...

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PUM

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Abstract

The invention provides a green and clean preparation method of a vanadium compound. The preparation method comprises the following steps of: crushing and ball-milling raw materials; then adding a vanadium element converter or a barium compound; leaching a fired product with clean water; adsorbing and enriching vanadium by using an ion exchange resin, and performing purification to remove barium and impurities; performing counter-extraction to extract vanadium by using a strong alkaline solution to generate a NaVO4 solution and removing other metal ions or impurities which are not dissolved in alkali; adding an ammonium compound to generate ammonium metavanadate and washing the ammonium metavanadate with deionized water or distilled water and drying the same; adding a phosphate diester anti-precipitator, and performing filter pressing and packaging heavy metals; and adding white carbon black of superfine powder into the solution, wherein ammonia and nitrogen are adsorbed in the white carbon black, and the heavy metals are packaged after filter pressing. The method provided by the invention can effectively eliminate original impurities in the raw materials and other impurities generated in the treatment process, and can make full of vanadium-settling wastewater while fully extracting the vanadium compound, so that green and clean production in the production process is realized.

Description

technical field [0001] The invention belongs to the technical field of vanadium compound preparation, and in particular relates to a method for recovering waste water while preparing vanadium compound. Background technique [0002] At present, the methods for preparing vanadium compounds are as follows: ① ion exchange method, which is to connect a plurality of ion exchange columns equipped with ion exchangers in series to form an ion exchange system; Adjust the pH value of the solution and heat until it is completely dissolved to obtain an ammonium polyvanadate solution; then add a composite flocculation impurity remover to the ammonium polyvanadate solution to obtain a preliminary purification solution; obtain a deep purification solution through an ion exchange system, desorb and regenerate it, and then Through precipitation of vanadium and filtration, high-purity ammonium metavanadate crystals are obtained. ② Reduction method: use reducing gas as reducing agent, react va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/00C02F1/54
CPCC01G31/003C02F1/542
Inventor 陈建军许小弟陈鑫鲁海霞
Owner 深圳力合通科技有限公司
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