Method for leaching vanadium in ferrovanadium spinel vanadium-containing minerals through complexing of hydrothermal oxalic acid

A spinel and ferrovanadium technology is applied in the field of hydrothermal leaching of vanadium in ferrovanadium spinel-type vanadium-containing minerals, which can solve the problems of difficulty in processing leaching tailings, pollution of the environment by fluoride, and inability to discharge at will, and the like. The effect of accelerating the leaching reaction rate, simplifying the process steps, and cleaning the leaching solution
CN110306044AActive Publication Date: 2019-10-08UNIV OF SCI & TECH BEIJING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Publication Date
2019-10-08

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Abstract

The invention provides a method for leaching vanadium in ferrovanadium spinel vanadium-containing minerals through complexing of hydrothermal oxalic acid, and belongs to the field of leaching of vanadium in ferrovanadium spinel vanadium-containing minerals through a hydrothermal method. According to the method, the ferrovanadium spinel vanadium-containing minerals are used as raw materials, ferrumpowder is used as a reducing agent, an oxalic acid solution is used as a leaching agent, and the ferrovanadium spinel vanadium-containing minerals, the ferrum powder and the oxalic acid are mixed into slurry to react under a hydrothermal condition; and solid-liquid separation is conducted on the slurry obtained after the reaction, so that clean vanadium-containing leachate and a ferrous oxalate by-product are obtained. According to the method, oxalate ions with a the strong complexing effect react with vanadium and ferrum in ferrovanadium spinel to form [V(C2O4)3]<3-> and [Fe(C2O3]<3-> to enter the solution; and the formed [Fe(C2O3]<3-> reacts with the Fe powder to form ferrous oxalate sediment, so that proceeding of the reaction is facilitated, and the leaching reaction rate is increased. By adoption of the method, vanadium in the ferrovanadium spinel vanadium-containing minerals can be effectively extracted, vanadium and ferrum are separated in the leaching process, the process steps are simplified, and the by-product, namely the ferrous oxalate, with high added value is obtained.
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Description

technical field

[0001] The invention belongs to the field of leaching vanadium in vanadium-iron-spinel type vanadium-containing minerals by hydrothermal method. It specifically relates to a method for obtaining vanadium-containing leaching solution and ferrous oxalate by-products by using strong complexation of oxalate ions and high-pressure reduction conditions to accelerate the leaching reaction rate. Background technique

[0002] Vanadium is an important metal element, which is widely used in machinery, aviation, electronic technology, defense industry and other industries, so it is called the metal "vitamin". my country's vanadium resources are mainly vanadium-titanium magnetite and vanadium-containing stone coal, and these two different vanadium-containing resources can be transformed into vanadium-containing minerals with vanadium-iron spinel phase through metallurgical means.

[0003] At present, the pressurized hydrometallurgical process has the characteristics of s...

Claims

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