Temperature control rare earth electrolytic bath

Abstract

The invention discloses a temperature control rare earth electrolytic bath. The temperature control rare earth electrolytic bath comprises a furnace body; the furnace body comprises a hearth; an outersteel sleeve is arranged at the external of the hearth; an insulation material is arranged between the outer wall of the hearth and the outer steel sleeve; a molybdenum or tungsten crucible for collecting rare earth metal is placed at a furnace bottom; the inner surface of a furnace wall is attached with an arc or square graphite block as an anode; the anode is fixedly connected with an anode electric conducting bracket in a furnace port; a tungsten-molybdenum rod is adopted as a cathode to insert in a smelting center area; a temperature measuring sensor is mounted between the upper part of the furnace wall and the anode; an auxiliary heating device is mounted at the lower part of the furnace bottom; and a temperature closed-loop control system consists of the temperature measuring sensor, the auxiliary heating device and a controller. An inner steel sleeve is mounted at the external of the furnace wall, and is a hollow sealed cavity made of a high-temperature resisting stainless steel plate. The temperature control rare earth electrolytic bath has the characteristics of insulation, thermal insulation, balanced furnace internal temperature, energy conservation, environmental protection, simple operation and the like, prevents the bottom accumulation and the anode utility phenomenon after use, quickly recovers the furnace temperature after interference by operations, and improves the quality of rare earth metal products.

Description

technical field [0001] The invention relates to an electrolysis device used in a rare earth molten salt electrolysis process, in particular to a temperature control type rare earth electrolysis cell. Background technique [0002] The rare earth molten salt electrolysis process is the mainstream method for the production and preparation of rare earth metals (alloys). As the main equipment of this process, the electrolytic cell directly affects the product quality, work efficiency and production cost of rare earth metals. When rare earth oxides are melted with molten salt, the melting temperature in the electrolysis equipment is around 1050°C. Maintaining a balanced and stable melting temperature during the electrolysis process is one of the prerequisites for the normal operation of the electrolysis process. [0003] The current rare earth electrolyzer generally uses graphite material as the furnace, which is surrounded by an inner steel sleeve. The middle of the furnace shell...

AI Technical Summary

Problems solved by technology

Existing problems: 1. The temperature of each point in the furnace varies greatly. The main reasons are: ①The open furnace mouth is a heat dissipation channel, forming a heat concentration point, which is higher than the temperature in the middle of the furnace; The temperature is also the highest; ③The current intensity at the bottom of the furnace is the weakest, and the heating temperature is the lowest

[0004] It can be seen that the current electrolytic cell cannot achieve temperature balance at each point in the furnace, nor can it achieve a constant temperature in the melting process.

The above problems make the working conditions of the rare earth electrolyzer unstable, and can only be operated by experience, and there are no rules to follow, which is the main reason for the poor quality of metal products, low yield and high power consumption

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