Method for utilizing chrome-vanadium solution to produce vanadium product and chromium sulfate basic

A chromium sulfate solution technology, applied in the field of vanadium chemical metallurgy, can solve the problems of easy accumulation of impurity elements, high equipment requirements, harsh operating conditions, etc., and achieve the effect of good application prospects, feasible technology, and simple equipment

CN107954474AActive Publication Date: 2018-04-24HEBEI IRON AND STEEL

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Patent Information

Authority / Receiving Office: CN · China
Current Assignee / Owner: HEBEI IRON AND STEEL
Publication Date: 2018-04-24

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Abstract

The invention relates to a method for utilizing a chrome-vanadium solution to produce a vanadium product and chromium sulfate basic. Through the steps of hydrolysis vanadium depositing, a calcification reaction, enriching of chrome, preparing of chromium sulfate basic and the like, a high-purity vanadium product and a chromium sulfate basic product are obtained, the concentration of the obtain vanadium product can reach 99.5% or above, the content of Cr2O3 in chromium sulfate basic can reach 24-26%, the content of a sundry Fe is smaller than 0.1%, the recovery rate of chrome and vanadium can reach 99.5% or above, and the purposes of efficiently extracting and separating chrome and vanadium are achieved. The production process is clean, saline water and NaOH mother liquor generated in the preparing process can return to a system for use, and no ammonia-nitrogen wastewater is generated in the whole process. The technology is feasible, the equipment is simple, the production cost is low,the automation is easy to implement, the economic benefit is high, and the application prospect is good.

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Description

technical field

[0001] The invention belongs to the technical field of vanadium chemical industry and metallurgy, and in particular relates to a method for cleanly producing vanadium products and basic chromium sulfate by using a vanadium-chromium solution. Background technique

[0002] Vanadium and chromium are important strategic resources. Because of their similar properties, they usually exist in vanadium-chromium magnetite in a symbiotic manner. Vanadium-chromium magnetite is smelted in blast furnace, vanadium is extracted in converter and other processes to obtain chromium-containing vanadium slag. Vanadium slag sodium roasting vanadium extraction is the mainstream vanadium extraction process used in vanadium production at home and abroad. Vanadium slag undergoes steps such as sodium roasting, leaching, and solution purification to obtain vanadium-chromium solution systems with different concentrations. Since the properties of vanadium-chromium aqueous solutions are si...

Claims

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