Method for purifying vanadium leaching solution

A technology for purifying impurity removal and leachate, applied in the direction of improving process efficiency, can solve the problems of unfavorable industrial continuous production, the purification effect needs to be improved, increasing the amount of acid added, etc., to meet the requirements of favorable treatment, acidity and impurity content Not high, the effect of reducing corrosion

Inactive Publication Date: 2011-11-23
HEBEI IRON AND STEEL
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Problems solved by technology

The problem that above-mentioned two technologies exist is: the technical scheme of CN101182036A is only limited to the purification of the vanadium liquid after the vanadium ore is roasted and ion-exchanged, and does not involve the purification of the vanadium liquid with complex composition of the vanadium liquid obtained by the direct leaching of vanadium slag clinker ; and the pH value of the purification solution is limited to 8-9, and the reaction of the vanadium solution is relatively long, which is not conducive to continuous industrial production
The technical solution of CN101724757A removes impurities only under alkaline conditions, if subsequent vanadium precipitation uses acidic ammonium salt to precipitate vanadium, it is necessary to increase the amount of acid added, which increases energy consumption
In summary, the impurity removal technology in the background technology is limited to alkaline conditions for the simultaneous removal of phosphorus and silicon, and the purification effect needs to be improved

Method used

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  • Method for purifying vanadium leaching solution
  • Method for purifying vanadium leaching solution
  • Method for purifying vanadium leaching solution

Examples

Experimental program
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Effect test

Embodiment 1

[0025] In this embodiment, phosphorus is removed in the vanadium slag clinker leaching process, and silicon is removed in the vanadium liquid.

[0026] Add 400g of clinker obtained by roasting the vanadium slag and additives in Table 1 into a 1000ml clean beaker, add 800ml of 80°C hot water for leaching and stirring, heat in a water bath to maintain this temperature, add 0.3g of magnesium sulfate, a small amount of sulfuric acid A solution made of ammonium and an appropriate amount of water, stirred for 10 minutes, stopped heating and stirring, left to stand for a period of time, then suction filtered, heated the filtrate to 80°C, added a solution made of 4.8g of aluminum sulfate and an appropriate amount of water, and adjusted the pH with sulfuric acid 8. After reacting for 10 minutes, cool down, let stand for 60 minutes, and filter to obtain [P]=5.65mg / L, [Si]=264.31mg / L vanadium liquid.

Embodiment 2

[0028] In this embodiment, phosphorus is removed in the vanadium slag clinker leaching process, and silicon is removed in the vanadium liquid.

[0029] Add 400g of clinker obtained by roasting vanadium slag and additives in Table 1 into a 1000ml clean beaker, add 800ml of 100°C hot water for leaching and stirring, heat in a water bath, add 0.38g of magnesium sulfate, a small amount of ammonium sulfate and an appropriate amount of The solution made of water was stirred for 15 minutes, the heating and stirring was stopped, and after standing for a period of time, it was suction filtered, the filtrate was heated to 100°C, the solution made of 4.5g of aluminum sulfate and an appropriate amount of water was added, and the pH was adjusted to 6.5 with sulfuric acid. After reacting for 15 minutes, cool down, let stand for 100 minutes, and filter to obtain [P]=4.60mg / L, [Si]=230.89mg / L vanadium liquid.

[0030] Table 1 The main chemical composition of a certain vanadium slag / g.L-1

...

Embodiment 3

[0033] This embodiment removes phosphorus and silicon from the vanadium slag leaching solution.

[0034] Add 800ml of vanadium leaching solution with concentration of 23.20g / L, phosphorus content of 25.82mg / L, silicon content of 432.38mg / L, pH8.5 into a 1000ml clean beaker, heat to 60°C, add 0.24g of magnesium sulfate, a small amount of ammonium sulfate and After stirring the solution made of appropriate amount of water for 5 minutes, add the solution made of 8.6g aluminum sulfate and appropriate amount of water, and adjust the pH to 7.0 with sulfuric acid. After reacting for 10 minutes, stop heating and stirring, cool to room temperature, and filter to obtain [P ]=7.53mg / L, [Si]=184.98mg / L vanadium solution.

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Abstract

The invention discloses a method for purifying vanadium leaching solution and belongs to the technical field of purification of vanadium leaching solution after vanadium extraction from vanadium slag. The invention adopts a technical scheme that the method comprises: 1, setting the temperature of the leaching solution of a vanadium-containing clinker to be between 60 and 100 DEG C, and adding phosphorus-removing purifying agent; 2, regulating the pH value of vanadium leaching solution by using an acid and adding a silicon-removing purifying agent; and 3, after the reaction is finished, cooling, standing, and filtering to obtain vanadium solution with low silicon and phosphorus content. The method has the advantages that: the operation is simple, the requirements on the acidity and impurity content of original vanadium solution are low, the pH value after purification is 5 to 8, the reaction time and standing time of the vanadium solution are short, and the industrial and continuous production is made easier; and the whole purification system adopts sulfate, so the introduction of chlorine ions is avoided, environment pollution is avoided, equipment requirements are low, corrosion to a pipe in a subsequent process is relieved, and the treatment of acid waste water is promoted.

Description

technical field [0001] The invention and a method for purifying and removing impurities of vanadium leaching liquid belong to the technical field of purification of vanadium leaching liquid after vanadium extraction from vanadium slag. Background technique [0002] Vanadium extraction from vanadium slag mostly adopts the method of sodium oxide roasting to obtain clinker, and obtains vanadium-containing solution through intermittent or continuous leaching. During the leaching process, impurities also enter the vanadium solution, such as phosphorus, silicon, manganese, iron, aluminum, Calcium, magnesium, sodium, chromium, etc. Among them, silicon and phosphorus have the greatest impact on precipitation and finished products. In the intermediate products of vanadium such as ammonium vanadate and ammonium metavanadate obtained from the impurity removal solution, silicon and phosphorus are difficult to remove in the process of further deep processing, directly affecting To the q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C22B34/22
CPCY02P10/20
Inventor 李秀雷马瑞峰刘维仲白云龙付美玲路金龙卢明亮徐雪峰张国杰陈军李伟斌
Owner HEBEI IRON AND STEEL
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