Preparation method of high-purity vanadium pentoxide for high-purity metal vanadium

Abstract

The invention relates to the field of industries and particularly relates to a preparation method of high-purity vanadium pentoxide for high-purity metal vanadium. The process of further adding a liquid solution to transform into vanadium pentoxide hydrates is partitioning precipitation and isolation completed through the mechanical structure as follows: a precipitation tank body comprises a liftable whole lift structure; the whole lift structure comprises a plurality of relatively independent isolation spaces which are isolated through compartment partition plates; the plurality of relatively independent isolation spaces comprise solution openings separately, so that the solutions in the isolation spaces can be communicate with the solution in the precipitation tank body; the whole lift structure is fixedly connected with a fixed lifting shaft; the fixed lifting shaft comprises a rack and a power shaft meshed with the rack, and the power shaft is capable of driving the fixed lifting shaft and the whole lift structure to lift through rotation; and the vanadium pentoxide hydrates are formed in various isolation spaces, then the whole lift structure is lifted upwards, and the vanadium pentoxide hydrates are taken out from various isolation spaces.

Description

technical field [0001] The invention relates to the industrial field, in particular to a method for preparing high-purity vanadium pentoxide for high-purity metal vanadium. Background technique [0002] Metal vanadium (element symbol V) is silver-gray, with an atomic number of 23 and a relative atomic mass of 50.42. It belongs to group VB in the periodic table of elements and has a body-centered cubic lattice. Its density is 6.11g / cm3, its melting point is 1917°C, and its boiling point is 3400°C. It is one of the few refractory metals. High-purity vanadium is malleable. The chemical properties of vanadium are relatively stable, it will not be oxidized at room temperature, and it can maintain its luster even below 300 ° C. It has good corrosion resistance to air, salt water, dilute acid and alkali. [0003] Vanadium products are mainly used in the steel industry. At present, vanadium products are more and more widely used in high-tech fields such as chemical industry, avia...

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Problems solved by technology

[0018] From the perspective of the process flow, it involves four process steps of roasting, leaching, enrichment (extraction or ion exchange) and vanadium precipitation. The traditional vanadium precipitation process is ammonia water or ammonium salt precipitation vanadium. The products are ammonium vanadate, vanadium precipitation During the process, a part of the ammonium salt participated in the process reaction and was transformed into a product. However, in the drying and dehydration before calcination, ammonia gas was removed, which caused great environmental pollution. In addition, some of the ammonium salt entered the wastewater system, and the ammonia nitrogen content in the wastewater was relatively high. , the cost of wastewater treatment is high, if it is discharged directly, it will cause great pollution to the environment

[0019] The defect of the prior art is that the precipitation rate is not high and the process time is long, which affects the purity and yield to a certain extent

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