Leaching process of vanadium-containing tailings clinker

Abstract

The invention discloses a leaching technology for tailings clinker containing vanadium and belongs to the technical field of extraction of vanadium from vanadium slag. The invention aims to provide a vanadium-extraction leaching technology for tailings clinker containing vanadium, which can achieve continuous production and has high leaching efficiency. The invention adopts the technical scheme as follows: a, ball milling is performed, that is, after being subjected to sodium salt roasting, the tailings clinker containing vanadium is subjected to wet ball milling to obtain a mixture of the tailings clinker containing vanadium and water, wherein the wet ball milling controls the particle size to achieve the effect that 70%-90% of the tailings clinker containing vanadium can pass through a 120-mesh sieve; b, the mixture is filtered in vacuum to obtain a solution and waste slag. The leaching technology provided by the invention can replace a tank car leaching technology in the original extraction technology of vanadium from tailings, achieve continuous production operation, shorten the leaching time of the tailings clinker and reduce the production cost.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction from vanadium slag, and in particular relates to a process for leaching vanadium-containing tailing slag clinker. Background technique [0002] Iron and steel plants will get a lot of high V 2 o 5 content of vanadium slag. Vanadium slag will be V 2 o 5 The vanadium-containing tailings with relatively low content are directly called tailings. Tailings usually contain 1.6-2.5% V 2 o 5 , 0.8-2.5% MFe, 15.0-20.0% H 2 O, the rest is SiO 2 , CaO, MgO, MnO, Cr 2 o 3 and other impurities, its particle size is usually 45-60% under the 120 mesh sieve. Tailings are mainly used for roasting to extract vanadium, and the remaining vanadium is recycled to produce vanadium pentoxide. [0003] In the prior art, the process of extracting vanadium from tailings mainly includes 5 processes of raw material pretreatment, sodium roasting, clinker leaching, vanadium precipitation and melting, and ...

AI Technical Summary

Problems solved by technology

This results in that part of the tailings clinker that has been roasted into balls needs to be screened out, returned to the ball mill for crushing, and then roasted again, which increases production costs to a certain extent. The screened tailings clinker accounts for about 10% of

The clinker leaching process in the prior art has the following disadvantages: intermittent operation, long soaking time in water, high residual moisture and soluble vanadium content in the spoil (tailing residue after vacuum filtration)

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