Method for preparing terbium-iron alloy by molten salt electrolysis

Abstract

The invention discloses a method for preparing a terbium-iron alloy by molten salt electrolysis, and relates to the technical field of terbium-iron alloy production. The invention comprises the following steps of SS01 preparing an electrolyte, preparing a fluoride molten salt system electrolyte according to a ratio; SS02 adding electrolyte, cleaning the electrolytic cell, turning on arc striking power supply until red of the bottom graphite block, adding the molten salt electrolyte, and removing the arc striking device until the height and the temperature of the molten salt liquid level reachthe electrolytic level; SS03 carrying out electrolysis, putting the cathode into a proper depth, starting the power supply to start electrolysis; SS04 finishing the electrolysis, raising the cathode,extracting the iron crucible, and pouring the liquid in the iron crucible into the casting mold; and SS05 obtaining finished product, cooling of materials in casting mold to solidification, and stripping the molten salt and the metal to obtain a product. The terbium-iron alloy is produced by an electrolysis method of the fluoride molten salt system, the problems that an existing terbium-iron alloyproduction method is long in technological process, large in equipment investment, non-uniform in product components and too low in rare earth yield are solved.

Description

technical field [0001] The invention belongs to the technical field of terbium-iron alloy production, in particular to a method for preparing terbium-iron alloy by molten salt electrolysis. Background technique [0002] There are three main production methods of rare earth metals and their alloys, one is vacuum reduction, the other is melting in a vacuum furnace, and the third is electrolysis of molten salt system. Electrolysis is divided into fluoride molten salt system oxide electrolyte electrolysis production and chloride System electrolysis production. [0003] The current production method of terbium-iron alloy is: first reduce terbium fluoride in a vacuum smelting furnace to produce metal terbium, then mix metal terbium and pure iron in a certain proportion, and melt in a vacuum furnace. The production of high-purity metals still needs to go through Vacuum distillation, zone smelting, arc smelting, plasma smelting, solid-state electromigration or electrolytic refining...

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Problems solved by technology

[0004] The object of the present invention is to provide a method for preparing terbium-iron alloy by electrolysis of molten salt, and produce terbium-iron alloy by electrolysis of fluoride molten salt system, which solves the problem that the existing terbium-iron alloy production method has a long process flow, a large investment in equipment, and insufficient product components. Uniformity, low yield of rare earth, and can directly produce high-purity terbium-iron alloy

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