Method for extracting scandium from red mud

Abstract

The invention relate to a method of extracting scandium from red mud, the method utilize the red mud that come from the process of producing aluminum oxide from alumyte, in accordance with specific characteristics of red mud, applying hydrochloric acid leach, P204 abstraction, acid-washing edulcoration, sodium-hydroxide back extraction, ammonia modifier hydrolytic decomposition zirconium and titanate in hydrochloric acid solution, oxalic acid precipitating scandium and medium temperature calcining technique, the purity of final production Sc2O3 is 99.9%. Extracting scandium from red mud change refuse into available material, save mineral resources, benefiting environmental conservation. The invention also fills up the study vacant of isolation technique in high-strength zirconium titanate and scandium.

Description

technical field [0001] The invention belongs to rare earth metal hydrometallurgy technology, in particular to a method for extracting scandium from red mud. Background technique [0002] Scandium is a very active scattered metal element. It is very similar to the lanthanide element in its electronic layer structure and chemical properties, so it is usually listed as a rare earth element. The excellent properties of scandium make it widely used in electric light source, aerospace, electronics industry, nuclear technology, superconducting technology and other important fields. [0003] Scandium exists widely in nature, and there are more than 800 kinds of scandium-containing minerals, but the independent mineral resources of scandium are few and small-scale, and cannot become an industrial source of scandium. Therefore, the industrial acquisition of scandium is achieved through the recovery of the associated element scandium during the comprehensive treatment of non-ferrous m...

AI Technical Summary

Problems solved by technology

Such a large amount of red mud has not been effectively and fully utilized, which has brought quite complicated social and economic problems: the construction of red mud storage yards occupies a large area of ​​land, which increases infrastructure investment; red mud contains alkali and a small amount of radioactive substances, and long-term storage After being dried, the dust will fly, seriously polluting the atmosphere and the environment; the wind and rain will cause the red mud to flow into rivers and lakes, poisoning the water quality, causing many social ecological environmental problems and economic benefit problems, and becoming an important source of environmental pollution

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