A kind of boiling chlorination extraction method of niobium and tantalum concentrate

Abstract

The invention discloses a fluidizing chlorination extraction method of niobium tantalum concentrates. The method comprises the following steps: the niobium tantalum concentrates are mixed with reducing agents and stabilizing agents to add in a fluidizing chlorination furnace; chlorine is introduced for reaction to generate overflowing matters overflowing outside the fluidizing chlorination furnace; and the overflowing matters are continuously cooled and separated by five stages. The method can solve the current situation of high pollution, high energy consumption and high material consumptionin the niobium tantalum smelting process, can solve the awkward situation of incapability of realizing metallurgical extraction caused by difficult extraction of niobium tantalum resources due to lowgrade, and can realize high-additional-value recovery of multiple resources when niobium tantalum is extracted; the niobium tantalum concentrates with high or low grades can be extracted by adopting the method; the method is short in process flow, and meets the atomic economy; and obtained niobium chloride can be directly electrolyzed to prepare metal niobium, so that the prominent environmental benefit is achieved, the three-waste emission is reduced, and the green extraction of niobium tantalum can be realized.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a boiling chlorination extraction method of niobium and tantalum concentrate. Background technique [0002] my country's consumption of niobium and tantalum accounts for 26% of the world's total, and it is the world's largest consumer of niobium and tantalum resources. However, almost all the concentrate products needed by my country's niobium and tantalum industry rely on imports, and the domestic production of niobium concentrate is less than the global output. 0.1%, and until the middle of this century, my country's demand for niobium may reach saturation. [0003] my country's niobium and tantalum smelting still has a large gap compared with the international advanced level in terms of production technology and product quality. The main factors hindering the development of niobium and tantalum smelting are: high product development costs, high consumption of raw...

AI Technical Summary

Problems solved by technology

[0003] my country's niobium and tantalum smelting still has a large gap compared with the international advanced level in terms of production technology and product quality. The main factors hindering the development of niobium and tantalum smelting are: high product development costs, high consumption of raw materials and auxiliary materials, Pollution is heavy, product quality is low, product added value is low, benefit is low, and there are not many enterprises in China that have mastered niobium and tantalum hydrometallurgy technology

At present, my country's niobium and tantalum smelting mainly relies on imported high-grade niobium and tantalum concentrates. The smelting methods only include hydrofluoric acid leaching and sulfuric acid hydrofluoric acid mixed acid leaching. There is nothing to do with ore with complex grades, and these two methods are high pollution, high material consumption, and high energy consumption processes. Compared with the bulk nonferrous metallurgy industry, there are serious problems such as backward technology and equipment. Small industry, so the general public does not pay much attention to it

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