Totally-closed liquid-state cathode rare earth fused salt electrolytic cell

Abstract

The invention discloses a totally-closed liquid-state cathode rare earth fused salt electrolytic cell which comprises a graphite cell body, wherein a liquid-state cathode is paved at the bottom of the graphite cell body; the graphite cell body is provided with an annular ring-shaped cell cover; a cylindrical anode is arranged in a ring of the annular cell cover, so as to realize the sealing of a cell mouth of the graphite cell body; a siphon port, a protection gas port and a feed port are formed in the annular cell cover; the anode is uniformly divided into four parts along the axial direction in a crossed manner; and the middle part of the upper part of each part of the anode is hollowed out and is provided with a steel claw fixing area. According to the totally-closed liquid-state cathode rare earth fused salt electrolytic cell, the solution loss and the secondary oxidation of metal can be reduced, the utilization rate of current is improved, and the distance between the cathode and the anode can be stably controlled, so that the normal operation of an electrolysis process can be facilitated; and the improved anode structure can improve the use efficiency of the anode, the anode consumption cost is reduced, introduced inertia protective gas can be used for prolonging the service lives of the anode and the cell body, the totally-closed cell-type design can enable the volatilization loss of a fluoride to be reduced, and the continuous and stable production can be facilitated.

Description

technical field [0001] The invention belongs to the field of rare earth metal metallurgy, in particular to a fully enclosed liquid cathode rare earth molten salt electrolytic cell. Background technique [0002] my country has become the world's largest producer, consumer and exporter of rare earth metals. Rare earth metals are widely used in glass ceramics, fluorescent and electronic materials industries, petrochemicals, aviation, aerospace and other military and defense fields. The main method for preparing rare earth metals by pyrometallurgy is molten salt electrolysis, which has become the most important industrial method for producing single light rare earth metals, mixed rare earth metals and rare earth alloys. The development history of molten salt electrolysis in my country can be divided into three stages: the stage of rare earth metal production by chloride electrolysis (1960s to 1980s); the stage of industrial technology research and development of fluoride system ...

AI Technical Summary

Problems solved by technology

However, it is still insufficient to improve the corresponding design of large-scale and highly automated electrolyzers in terms of effective material utilization, energy saving, and environmental protection.

Images