A method for separating rare and precious metals based on floatation extraction system

Abstract

The invention discloses a method for separating rare and precious metals based on a floatation extraction system. The flotation extraction system includes a mixing and stirring device, a flotation extraction device, a stripping and a medicament circulation regeneration device and a gas conveying device. The dissolved rare precious metal solution and the flotation agent are mixed in the mixing and stirring device to form a material liquid, and the material liquid is introduced into the flotation extraction device for micro-nano bubble flotation and organic phase extraction. The device uses a stripping agent to carry out stripping, standing for stratification, the aqueous phase is the target rare and precious metal enrichment solution, and the organic phase is distilled and separated to obtain a flotation agent and an organic solvent, which are recycled. When the system is used for the separation of rare and precious metals, it has obvious advantages such as simple operation, low consumption of reagents, high separation efficiency, and full-process recycling of flotation reagents and organic solvents, and has good industrial application prospects.

Description

technical field [0001] The invention relates to a method for separating rare and precious metals, in particular to a method for separating rare and precious metals from a solution system based on a floatation extraction system, and belongs to the technical field of metallurgical separation. Background technique [0002] Rare and precious metals have unique properties such as excellent electrical conductivity, ductility, heat resistance and corrosion resistance, and play an irreplaceable key role in many fields such as chemical metallurgy, integrated circuits, aerospace, national defense and military industries. The reserves of rare and precious metals in my country are limited, mainly associated metals are scattered in bulk metal ores, and most of the rare and precious metals with similar properties are substituted for each other in the form of isomorphism, which causes great difficulties in their deep separation. At present, the separation of rare and precious metals mainly...

AI Technical Summary

Problems solved by technology

[0005] In view of the technical difficulties in the separation of rare and precious metals in the solvent extraction method in the prior art, the purpose of the present invention is to provide a method based on a floating extraction system and realize the separation of rare and precious metals in dissolved rare and precious metal solutions through floating extraction methods. The method uses the floating extraction system to couple the froth flotation in the mineral processing process and the solvent extraction process in the hydrometallurgy process, which has the dual advantages of froth flotation and solvent extraction. Mass transfer to bubbles or coupled solvent extraction process on the basis of ion flotation greatly improves the separation efficiency of the process compared with common ion / precipitation flotation or solvent extraction, and has obvious advantages such as simple operation, less reagent consumption, and high separation efficiency. It overcomes the shortcomings of traditional separation methods such as low separation efficiency and lengthy operation process in the treatment of dissolved rare metal ions, and has a good industrial application prospect.

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