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Settling method of vanadium mud in leaching vanadium liquid

A vanadium solution and leaching technology, which is applied in the field of vanadium sludge settling in leaching vanadium solution, can solve the problems that the production system cannot be shut down normally, it is difficult to obtain a clear vanadium solution, the vanadium sludge sedimentation speed is slow, etc., and the separation efficiency of vanadium sludge can be improved. , shorten the vanadium precipitation time, and improve the effect of purification efficiency

Active Publication Date: 2017-10-24
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the turbidity of the vanadium liquid is serious, there is no qualified vanadium liquid used in the vanadium precipitation process, and a large amount of vanadium liquid is circulated in the vanadium precipitation and impurity removal process, resulting in the failure of normal production of the entire production system and final shutdown
[0005] To sum up, the existing aluminum-based flocculants cannot settle the small-particle flocs containing silicon and phosphorus impurities, and the settling speed of vanadium mud is slow, making it difficult to obtain clarified vanadium liquid.

Method used

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  • Settling method of vanadium mud in leaching vanadium liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: figure 1 As shown, the processing steps of the sedimentation method of vanadium mud in this vanadium leaching liquid are as follows.

[0019] The 200.00m 3 The vanadium leaching solution is introduced into the purification reactor, and 300.00kg of polyaluminum chloride is added to the vanadium leaching solution for purification operation. After the purification process is over, pour the purified vanadium liquid and cationic polyacrylamide solution into the vanadium liquid settling tank for sedimentation; the concentration of cationic polyacrylamide is 3.00‰ (mass), and the dosage is 40.00m 3 . In the settling tank, the vanadium mud sinks rapidly, and the impurity silicon content after clarification of the vanadium liquid is 75.00 mg / L, and the phosphorus content is 4.00 mg / L; In the vanadium process, the vanadium is deposited, and the bottom mud is separated from the solid and liquid by the vanadium mud separation equipment. The vanadium precipitation tim...

Embodiment 2

[0020] Embodiment 2: The processing steps of the settling method of vanadium mud in this vanadium leaching liquid are as follows.

[0021] In the 200.00m 3 Add 500.00kg of aluminum sulfate to the vanadium solution, and add 80.00m of amphoteric polyacrylamide with a concentration of 0.50‰ (mass) to the purified solution after purification 3 , The vanadium mud sinks rapidly, the vanadium liquid is clarified, the impurity silicon content in the vanadium liquid is 105.00mg / L, and the phosphorus content is 11.00mg / L. Use this clarified vanadium solution to precipitate vanadium, the time for vanadium precipitation is 110 minutes, the supernatant concentration of the vanadium precipitation is 0.11g / L, and the ammonium vanadate obtained is calcined to obtain powder vanadium pentoxide, the composition is: V 2 o 5 99.01%, Si 0.069%, Fe 0.057%, P0.011%, K 2 O+Na 2 O 0.58%, C 0.049%, S 0.066%, meet the requirements of the standard YB / T5304-2011.

Embodiment 3

[0022] Embodiment 3: The processing steps of the sedimentation method of vanadium mud in this vanadium leaching liquid are as follows.

[0023] In the 200.00m 3 Add 800.00kg of aluminum chloride and 800.00kg of polyaluminum sulfate to the vanadium solution, and add 60.00m of anionic polyacrylamide with a concentration of 5.00‰ (mass) to the purified solution after purification 3 , The vanadium mud sinks rapidly, the vanadium liquid is clarified, the impurity silicon content in the vanadium liquid is 98.00mg / L, and the phosphorus content is 9.00mg / L. Use this clarified vanadium solution to precipitate vanadium, the concentration of the vanadium supernatant is 0.095g / L, and the vanadium precipitation time is 102 minutes, and the ammonium vanadate obtained is calcined to obtain powder vanadium pentoxide, the composition is: V 2 o 5 98.98%, Si0.053%, Fe0.068%, P0.007%, K 2 O+Na 2 O 0.64%, C 0.038%, S 0.086%, meet the requirements of the standard YB / T5304-2011.

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Abstract

The invention discloses a settlement method of vanadium mud in a leached vanadium liquid. The settlement method comprises the following steps of adding an aluminum salt into a leached vanadium liquid for purification, adding a polymer flocculant solution into the purified vanadium liquid, carrying out mixing to obtain a uniform mixture, and carrying out standing for solid-liquid separation so that a clear vanadium liquid and vanadium mud are obtained. The leached liquid is added with the aluminum salt for purification and then is added with the polymer flocculant solution so that the vanadium mud can be fast deposited. Therefore, the settlement method effectively improves a vanadium mud sedimentation rate, shortens vanadium sedimentation time and effectively improves vanadium liquid purification efficiency so that the whole production process connection is more smooth, vanadium sedimentation time of the vanadium sedimentation process is shortened to about 100min from 250min and production efficiency is improved. The settlement method effectively reduces silicon and phosphor impurity content of the vanadium liquid, reduces a vanadium concentration of the supernatant, effectively reduces unit consumption of aluminum sulfate as a purification agent, reduces system vanadium loss, improves vanadium mud separation efficiency, reduces transport amount of a turbid vanadium liquid and reduces energy consumption.

Description

technical field [0001] The invention relates to a method for purifying vanadium liquid, in particular to a settling method for leaching vanadium mud in vanadium liquid. Background technique [0002] Vanadium extraction from vanadium slag generally goes through the process of raw material preparation, roasting, leaching, vanadium solution purification, vanadium precipitation, APV calcination and casting. The quality of ammonium and other subsequent vanadium products plays a decisive role, so the choice of vanadium liquid purification method is particularly important. [0003] The vanadium slag roasted clinker is densely leached, and soluble impurities such as silicon and phosphorus enter into the leached vanadium solution with the dissolution of sodium vanadate. Under alkaline conditions, some impurity ions in the vanadium leaching solution undergo hydrolysis reactions to form colloidal suspensions, forming particle clusters with a double-electron layer structure and dispers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56C22B3/22C22B34/22
CPCY02P10/20
Inventor 张国杰马瑞峰豆长宏徐雪峰王震宇王少伟
Owner HEBEI IRON AND STEEL
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