Method for preparing vanadium liquid through vanadium oxide industrial waste water

A technology for industrial wastewater and vanadium oxide, applied in the field of metallurgy and chemical industry, can solve the problems of unrecycled and waste resources, and achieve the effect of reducing acid consumption and cost

Active Publication Date: 2016-02-03
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the water bath material is settled, the supernatant enters the wastewater process and is treated together with the vanadium precipitation wastewater. A large amount of vanadium enters the waste residue and is not recycled, resulting in waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Filter the water bath material (pH=8), mix 100mL filtrate with 400mL manganese extraction wastewater (pH=1.0), and add calcification and roasting clinker to the mixture according to the liquid-solid volume weight ratio of 2.5:1 (ml / g) (TV is 9.46%, V 5+ is 8.64%), using [H + ] The mixed solution of manganese extraction wastewater and concentrated sulfuric acid with a concentration of 3mol / L is used as an acidity regulator. Under the conditions of leaching pH=2.6 and leaching temperature of 40°C, stir and react for 60min to obtain leaching slurry, filter, wash, and dry After the residue was obtained, the TV in the analyzed residue was 1.05% after weighing, and the vanadium leaching rate was calculated to be 98.24%.

Embodiment 2

[0021] Filter the water bath material (pH=10), mix 100mL filtrate with 600mL manganese extraction wastewater (pH=2.0), and add calcification and roasting clinker to the mixture according to the liquid-solid volume weight ratio of 2:1 (ml / g) (TV is 8.72%, V 5+ is 7.84%), using [H + ] The mixed solution of manganese extraction wastewater and concentrated sulfuric acid with a concentration of 2mol / L is used as an acidity regulator. Under the conditions of leaching pH=3.0 and leaching temperature of 50°C, stir and react for 80min to obtain leaching slurry, filter, wash, and dry Finally, the residue was obtained. After weighing, the TV in the residue was analyzed to be 0.98%, and the vanadium leaching rate was calculated to be 97.73%.

Embodiment 3

[0023] Filter the water bath material (pH=11), mix 100mL filtrate with 800mL manganese extraction wastewater (pH=2.5), and add calcification and roasting clinker to the mixture according to the liquid-solid volume weight ratio of 1.5:1 (ml / g) (TV is 8.92%, V 5+ is 8.06%), using [H + ] The mixed solution of manganese extraction waste water and concentrated sulfuric acid with a concentration of 5mol / L is used as an acidity regulator. Under the conditions of leaching pH=2.8 and leaching temperature of 55°C, stir and react for 80min to obtain leaching slurry, filter, wash, and dry Finally, the residue was obtained. After weighing, the TV in the residue was analyzed to be 1.15%, and the vanadium leaching rate was calculated to be 96.92%.

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Abstract

The invention belongs to the technical field of metallurgical chemistry engineering and discloses a method for preparing vanadium liquid through vanadium oxide industrial waste water. The method is mainly applied to the process of leaching for vanadium extraction of vanadium-containing clinker. The method aims at being used for acid leaching of calcium roasting clinker through two kinds of waste water including manganese extraction waste water and water bath materials which are produced through vanadium oxide, and used for recycling valuable elements in the calcium roasting clinker, and therefore waste water is effectively utilized. The method includes the following steps that firstly, the water bath materials are filtered, a filtrate is mixed with the manganese increasing water according to a certain proportion, and mixed liquid is obtained; secondly, the calcium roasting clinker is added to the mixed liquid according to a certain liquid-solid ratio, stirring is conducted, the temperature is raised to 40-55 DEG C, the pH of a system is adjusted to 2.6-3.0; and thirdly, solid-liquid separation is conducted, filter residues are washed through the mixed liquid in the first step, and the obtained filtrate is a vanadium-containing leaching agent.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and chemical industry, and is mainly used in the process of leaching and extracting vanadium from vanadium-containing clinker, and is a method for preparing vanadium liquid by using vanadium oxide industrial wastewater. Background technique [0002] In the clean production of vanadium oxide in Panzhihua Iron and Steel, the converter vanadium slag is crushed and ball milled, mixed with a certain amount of limestone, and then enters the rotary kiln for calcification and roasting to obtain calcification and roasting clinker, and then the low-priced vanadium in the vanadium slag is oxidized into soluble The pentavalent vanadium in water is leached with acid to obtain a vanadium-containing leaching solution. After removing impurities from the leaching solution, acidic ammonium salts are used to precipitate vanadium to obtain ammonium polyvanadate (APV), and then dried and reduced to obtain vanadium t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/22
CPCY02P10/20
Inventor 陈燕彭毅何文艺叶露申彪陈相全
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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