Method for preparing metal through continuous reduction in molten salt medium

Abstract

The present invention relates to a metal material preparation method, particularly to a method for preparing a metal through continuous reduction in a molten salt medium. According to the method, a molten alkali metal and alkaline earth metal mixing halide MaY-MeY2 is adopted as the flux of a molten salt medium, an alkaline earth metal oxide MeO/alkaline metal halide MaY mixture capable of being dissolving in the flux of the molten salt medium is used to replace an alkaline metal so as to be adopted as a reduction agent, the specifically-selected MeO/MaY mixture is added to the molten MaY-MeY2 flux to form a MeO-MaY-MeY2 molten salt, the molten salt medium is subjected to electrolysis to decompose the MeO dissolved in the medium so as to finally obtain the Ma-MaY-MeY2 molten salt medium, an oxide MO is added to the formed Ma-MaY-MeY2 molten salt medium under the support of the electrolysis process performing under the conditions, and the alkali metal Ma instantly performs thermal reduction on the added oxide MO so as to prepare the metal M. According to the present invention, the disadvantages of complex operation and danger of the direct alkali metal reduction agent adding in the traditional thermal reduction are overcome; the excessive use of the alkali metal reduction agent is solved, and the continuous production can be achieved; and the cost is low, and the energy consumption is low.

Description

technical field [0001] The invention relates to the preparation of metal materials, in particular to a method for preparing metal materials in a molten salt medium. Background technique [0002] Metal oxides or sulfides are the main mineral forms of metal elements in the earth's crust. The basic methods for extracting valuable metals from minerals include: (1) using beneficiation to extract concentrates with high metal oxide or sulfide content from minerals; (2) using smelting to convert concentrates into crude metals, and then Refining crude metals to obtain high-purity metals; or (3) first converting concentrates into metal compounds (metal oxides, metal sulfides, or other forms of metal compounds), and then preparing metals from these metal compounds. The traditional preparation of metals from metal compounds relies on: (1) hydrometallurgical preparation, (2) high-temperature chemical preparation, and (3) electrochemical preparation. [0003] With Lively Metal M 1 Co...

AI Technical Summary

Problems solved by technology

The invention overcomes the shortcomings of complex and dangerous operation of directly added alkali metal reducing agent; solves the problem of high safety management requirements and great difficulty; assists in-situ generation and regeneration of alkali metal reducing agent by electrolytic molten salt medium: solves the problem of excessive use of alkali metal reduction It overcomes the shortcomings of the traditional alkali metal thermal reduction batch production process, which is difficult to achieve continuous operation; it also overcomes the existing disadvantages of complex metal thermal reduction process in molten salt medium, long production cycle, high cost, and large energy consumption.

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