Method for decomposing ore concentrate containing tantalum, niobium and rare-earth element

Abstract

The invention relates to a method for decomposing a concentrated ore containing tantalum, niobium and rare-earth elements, which is characterized by comprising the following steps: evenly mixing the concentrated ore containing the tantalum, niobium and rare-earth elements, concentrated sulfuric acid and sulfate according to a weight ratio of 1:0.8-2.5:0.8:1.5, roasting the mixture for 0.5 to 8 hours at a temperature of between 180 and 400 DEG C; adding water into the mixture after roasting, stirring the mixture for 0.5 to 3 hours at a temperature of between 20 and 80 DEG C; and filtering and washing the mixture, wherein the tantalum, the niobium and the rare-earth elements enter the solution. The method decomposes the tantalum, the niobium and the rare-earth elements, and improves leaching rate of the tantalum and the niobium at the same time, wherein the leaching rate of the rare-earth elements reaches more than 90 percent, and the method prepares for next separation.

Description

technical field The invention relates to a method for decomposing rare earth element concentrates, in particular to a method for decomposing rare earth element concentrates containing tantalum and niobium. Background technique With the increasing consumption of rare earth element resources, complex associated rare earth element resources need to be comprehensively developed and utilized. Many associated rare earth element resources contain rare metals such as tantalum and niobium. The elemental concentrate also contains a small amount of tantalum and niobium, about 0.5-40%. "Niobium and Tantalum" (A.B.EЛЮTИH et al., Central South University of Technology Press, P52~P66,) summarizes the current domestic and foreign research on the treatment of rare earth element concentrates containing tantalum and niobium mainly adopts the following methods: 1. Hydrofluoric acid decomposition method . The tantalum and niobium are extracted by hydrofluoric acid leaching, and the rare earth...

AI Technical Summary

Problems solved by technology

This method also needs to decompose tantalum, niobium and rare earth elements separately, and the process is complicated

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