Method for extracting vanadium from ammonium phosphate leaching vanadium containing raw clinker

An ammonium phosphate and raw material technology, applied in the field of vanadium chemical metallurgy, can solve the problems of ammonium salt loss, short technological process, low production cost, etc., and achieve the effects of avoiding ammonia volatilization, friendly operation environment and low production cost

Inactive Publication Date: 2016-06-15
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0008] Aiming at the technical problems of ammonium salt loss caused by a large amount of ammonia volatilization in the leaching process of the existing vanadium slag oxidative roasting ammonium leaching technology, poor operating environment and serious loss of leaching agent, the purpose of the present invention is to provide a vanadium-containing raw material leached by ammonium phosphate A method for extracting vanadium from clinker, the method has high vanadium selective leaching rate and less impurity element leaching, which is beneficial to the preparation of high-purity vanadium products; the ammonium phosphate solution used in the method is non-volatile, which can avoid a large amount of leaching process. Ammonia; and, the method process flow is short, the leaching process flow is simple, environmentally friendly, and the production cost is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] will V 2 o 5 Vanadium slag with a content of 11% was roasted at 700°C for 2 hours. The clinker was leached to extract vanadium in a solution with an ammonium phosphate concentration of 200g / L. The leaching temperature was 40°C, the leaching liquid-solid ratio was 20mL / g, and the leaching time was After 5h, the leaching residue and vanadium-containing liquid were obtained after filtration.

[0034] The leached slag was washed, dried, weighed and analyzed for the vanadium content of the residue. It was tested that the vanadium transfer leaching rate was 95%.

Embodiment 2

[0036] will V 2 o 5 Vanadium slag with a content of 15% was roasted at 950°C for 0.5h. The clinker was leached to extract vanadium in a solution with an ammonium phosphate concentration of 500g / L. The leaching temperature was 70°C, the leaching liquid-solid ratio was 5mL / g, and the leaching time was After 1h, the leaching residue and vanadium-containing liquid were obtained after filtration.

[0037] The leached slag was washed, dried, weighed and analyzed for the vanadium content of the residue. It was tested that the vanadium transfer leaching rate was 91%.

Embodiment 3

[0039] will V 2 o 5 Vanadium slag with a content of 20% was roasted at 850°C for 1 hour. The clinker was leached to extract vanadium in a solution with an ammonium phosphate concentration of 600g / L. The leaching temperature was 90°C, the leaching liquid-solid ratio was 10mL / g, and the leaching time was After 1h, the leaching residue and vanadium-containing liquid were obtained after filtration.

[0040] The leached slag was washed, dried, weighed and analyzed for the vanadium content of the residue, and the vanadium transfer leaching rate was detected to be 94%.

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Abstract

The invention provides a method for extracting vanadium from ammonium phosphate leaching vanadium containing raw clinker. The method comprises the steps that a vanadium containing raw material is subjected to blanking roasting to obtain the vanadium containing raw clinker; the vanadium containing raw clinker is leached in an ammonium phosphate solution for vanadium extraction; and after solid-liquid separation, leaching residues and a vanadium containing solution are obtained. According to the method, the selective leaching rate of vanadium is high and can reach 90% or above; meanwhile, few impurity elements are leached out, preparation of a high-purity vanadium product is facilitated, and no salt containing waste water is generated; a leaching agent, the ammonium phosphate solution, adopted in the method does not volatilize, so that the problem of ammonia gas volatilization is avoided; and in addition, the method is simple in leaching technological process, friendly in operation environment and low in production cost.

Description

technical field [0001] The invention belongs to the technical field of vanadium chemical metallurgy, and relates to a method for extracting vanadium from vanadium-containing raw material clinker, in particular to a method for extracting vanadium from vanadium-containing raw material clinker by ammonium phosphate. Background technique [0002] The method for extracting vanadium from vanadium slag is roasting-water leaching method, among which sodium roasting-water leaching of vanadium-containing raw materials is the mainstream method for vanadium extraction. The basic principle of the sodium roasting process is based on Na 2 CO 3 , NaCl, Na 2 SO 4 Waiting for sodium salt as an additive, converting the low-valence vanadium in the vanadium-containing raw material into water-soluble sodium salt of pentavalent vanadium through high-temperature roasting (750-850°C), and then directly immersing the sodium-calcined roasted product in water to obtain vanadium-containing The leach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B1/02C22B3/04
CPCC22B1/02C22B3/04C22B34/22Y02P10/20
Inventor 刘彪郑诗礼杜浩李猛王少娜张洋
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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