Method for recovering tantalum resources from potassium fluorotantalate crystallization mother liquor

Abstract

The present invention provides a method for recovering tantalum resources from potassium fluorotantalate crystallization mother liquor, which uses potassium fluorotantalate crystallization mother liquor as raw material, and comprises the steps of acidifying the potassium fluorotantalate crystalline mother liquor first, and adding an extraction agent to extract the tantalum. , separation, recovery and preparation of tantalum resources, effectively solving the problems of high treatment cost and difficult treatment of ammonia nitrogen-containing wastewater in the prior art method in the tantalum-niobium hydrometallurgical industry using ammonia to neutralize and recover tantalum resources. The method has the characteristics of simple and effective method, energy saving and emission reduction, environmental protection, low pollution and obvious economic benefits.

Description

technical field [0001] The invention relates to the field of rare resource recovery of chemical raw materials, 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 electronic, military, aerospace and medical fields. Although China is rich in tantalum minerals, the ore grades are low, and the embedded granularity is fine and dispersed, which is very difficult to mine, separate and select. Therefore, how to maximize the utilization of tantalum resources is a research topic in the tantalum and niobium industry. be especially important. The potassium fluorotantalate crystallization mother liquor often still contains a small amount of tantalum. As a waste liquid containing tantalum resources, the potassium fluorotantalate crystallization mother liquor is not recycled. On the one hand, it is very easy to cause...

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.