A method for grouping and separating yttrium oxide from high-yttrium-type rare earth ores

Abstract

The invention relates to a method for grouping and separating yttrium oxide from high-yttrium type rare earth ores, and belongs to the technical field of rare earth extraction and separation. It solves the problem that the HAB system is difficult to quickly analyze the concentration changes of the two extractants in the long-term use of the HAB system in the process flow of separating yttrium, which limits the technical problems of its industrial application. In the method provided by the present invention, firstly, P507-isooctanol and other mixed systems of erbium and thulium are grouped to obtain high-yttrium enrichment and thulium, ytterbium and lutetium enrichment, and then separated to prepare heavy rare earths such as lutetium oxide, and then the high-yttrium enrichment is obtained using a carboxylic acid extractant The HA-TBP mixed system is used to separate and prepare yttrium oxide, and the final La-Er enrichment is separated from other single rare earth elements by grouping with the P507 system. This grouping separation method is advanced and reasonable, with short process flow, low production cost, strong adaptability, and easy operation and control. And other advantages, comprehensive technical and economic index performance is better than naphthenic acid process, has practical application value.

Description

technical field [0001] The invention belongs to the technical field of rare earth extraction and separation, and in particular relates to a method for grouping and separating yttrium oxide from high-yttrium type rare earth ores. Background technique [0002] Southern ionic rare earth ores have a complete distribution, mainly medium and heavy rare earths, rich in europium, terbium, dysprosium, erbium, lutetium, yttrium and other medium and heavy rare earth elements required for functional materials. They are unique strategic resources in my country. Ion-type ores are mainly distributed in Jiangxi, Fujian, Guangdong, Hunan and Guangxi provinces in southern my country. According to the distribution characteristics of rare earth ores, they can be divided into light rare earth type, medium yttrium rich europium type and high yttrium type (also known as heavy rare earth type). type). The content of heavy rare earths in high-yttrium rare earth ores is about 90%, of which the conten...

AI Technical Summary

Problems solved by technology

However, industrial practice shows that there are some problems in this process: because naphthenic acid is a by-product of petroleum processing, it has a complex composition and high water solubility, and the composition changes after long-term use, which affects the stability of the process; , prone to emulsification; affected by raw material composition and temperature, the separation coefficient of lanthanum and yttrium is small, which causes great difficulties in the separation of yttrium and lanthanum

However, during the long-term use of the HAB system, there are problems such as the difficulty of rapid analysis of the concentration changes of the two extractants on site, which limits its industrial application.

Images