A method for preparing vanadium pentoxide by ball milling calcification-ammonization of vanadium-containing raw materials

Abstract

The invention relates to a method for preparing vanadic oxide from vanadium-containing raw materials through ball milling calcification and ammonification. The method comprises the following steps ofmixing quicklime, water and vanadium-containing raw materials; then, performing ball milling and calcification reaction; after the calcification is completed, performing solid-liquid separation to obtain calcium vanadate; at the normal temperature, mixing the obtained calcium vanadate with ammonium salt; then, performing ball milling; performing ammonification reaction; after the reaction is completed, performing solid-liquid separation; obtaining ammonium metavanadate-containing solution and calcium carbonate; performing impurity removal on the ammonium metavanadate-containing solution; performing cooling and crystallization on the solution subjected to impurity removal; performing solid-liquid separation to obtain ammonium metavanadate crystals; performing roasting; obtaining vanadic oxide. The low-liquid-solid-ratio quicklime and water are used; mixing, ball milling and activation are combined for performing calcification reaction; the calcification water consumption is reduced; thecalcification rate reaches 97 percent or higher; meanwhile, the ball milling ammonification reaction is performed at the normal temperature, so that the ammonia gas volatilization in the ammonification process is inhibited; the ammonification rate reaches 98 percent or higher. The technical flow process is shortened; the operation is convenient; the equipment is simple; good application prospectsare realized.

Description

technical field [0001] The invention relates to the technical field of vanadium chemical metallurgy, in particular to a method for preparing vanadium pentoxide by ball milling calcification-ammonization of vanadium-containing raw materials. Background technique [0002] With the advancement of science and technology, the application fields of vanadium continue to expand, and some high-tech fields have put forward higher requirements for the grade of vanadium raw materials, especially vanadium oxide. At present, high-end products in the vanadium application field include aerospace-grade vanadium-aluminum alloys, electrolytes for all-vanadium redox flow batteries, nano-scale vanadium functional materials, vanadium catalysts, vanadium luminescent materials, etc. For example, in the field of aerospace, vanadium-aluminum alloys are mainly used to produce jet engines, high-speed aircraft frames and rocket engine casings, and the requirements for specific elements of the raw materi...

AI Technical Summary

Problems solved by technology

[0008] As can be seen from the above, there are many problems such as too long technical process, high energy consumption in the method for preparing high-purity vanadium pentoxide at present, and the use of acid solution or ammonia in the leaching process is volatile, so it is necessary to develop a new method for preparing high-purity vanadium pentoxide A method of pure vanadium pentoxide to overcome the above-mentioned problems