Method for recovering tantalum resources from potassium fluorotantalate crystallization mother liquor

Abstract

The invention provides a method for recovering tantalum resources from potassium fluorotantalate crystallization mother liquor. The potassium fluorotantalate crystallization mother liquor is used as araw material. The method comprises the steps of acidification treatment on the potassium fluorotantalate crystallization mother liquor, extraction after adding of an extracting agent, separating, recovering and preparation of the tantalum resources, so that the problems that the treatment cost is high and treatment of produced ammonia-nitrogen wastewater is difficult due to the fact that tantalumresources is neutralized and recovered by ammonia in the prior art method in the tantalum-niobium wet smelting industry are solved. The method has the characteristics of simpleness, effectiveness, energy saving, emission reduction, environmental protection, small pollution, obvious economic benefits and the like.

Description

technical field [0001] The invention relates to the field of recovery of rare chemical raw material resources, in particular to a method for recovering tantalum resources from potassium fluorotantalate crystallization mother liquor. [0002] technical background [0003] Tantalum is a rare metal with high value, which is widely used in electronics, military industry, aerospace and medical fields. Although China is rich in tantalum minerals, but the ore grade is low, and the embedded distribution is fine and scattered. is especially important. Potassium fluorotantalate crystallization mother liquor often still contains a small amount of tantalum. Potassium fluorotantalate crystallization mother liquor is a waste liquid containing tantalum resources. If it is not recycled, it will easily pollute the environment and cause damage to tantalum resources. Wasted. However, the current common practice in the hydrometallurgy industry of tantalum and niobium is to use ammonia to neut...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for recovering tantalum resources from the potassium fluorotantalate crystallization mother liquor, which uses the potassium fluorotantalate crystallization mother liquor as the raw material, including first acidifying the potassium fluorotantalate crystallization mother liquor, adding the extractant The extraction, separation, recovery and preparation of tantalum resources can effectively solve the problems of using ammonia to neutralize and recover tantalum resources in the existing technical methods of the tantalum and niobium hydrometallurgy industry, resulting in high processing costs and difficult treatment of ammonia nitrogen-containing wastewater.