Automatic rare earth oxide fluorination transformation system

Abstract

The invention discloses an automatic rare earth oxide fluorination transformation system. The automatic rare earth oxide fluorination transformation system comprises a feeding area, a material preparation area, a fluorination area, a cooling area and a discharging area which are arranged in sequence, wherein the feeding area, the material preparation area, the fluorination area, the cooling area and the discharging area are gradually fed through an operation mechanism, the fluorination area is provided with an air supply system, a temperature control system, a hydrofluoric acid recovery systemand a pressure adjusting system, and the operation mechanism, the air supply system, the temperature control system, the hydrofluoric acid recovery system and the pressure adjusting system are in communication connection with a program control computer host. Through the system, the whole fluorination process can be carried out in a closed environment; therefore, a fluoride product with stable quality and a good working environment are ensured; the system can effectively recover byproduct hydrofluoric acid so as to prevent the hydrofluoric acid from being discharged into the air to pollute theenvironment, the recovered byproduct can be reutilized, automatic control can be realized through the system, the whole fluorination efficiency is improved, and the labor cost is saved.

Description

technical field [0001] The invention relates to an automatic rare earth oxide fluorination transformation system. Background technique [0002] Rare earth fluoride is a raw material for molten salt in electrolytic metals. It is specifically made from rare earth oxides through a fluorination transformation process. It is widely used in the surface treatment of high-end magnetic materials. Traditional preparation processes usually include water hydrofluoric acid process, dry ammonium bifluoride mixed fluorination method and the widely used anhydrous hydrogen fluoride gas phase heating reaction method. The anhydrous hydrogen fluoride vapor phase heating reaction method is based on the principle of chemical transformation to prepare and produce rare earth fluorides. [0003] The main problems of the traditional equipment used in the existing anhydrous hydrogen fluoride gas-phase heating reaction method are as follows: 1) The equipment cannot be sealed during the chemical reacti...

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Problems solved by technology

[0003] The main problems of the traditional equipment used in the existing anhydrous hydrogen fluoride gas-phase heating reaction method are: 1) The equipment cannot be sealed during the chemical reaction, the environmental pollution of the production post is serious, and the operation of employees lacks safety guarantees

2) The internal leakage of the chemical reaction forms a vacuum loss and cannot effectively maintain the temperature control of the process technology, resulting in unstable quality after fluorination, and the amount of hydrogen fluoride gas exceeds the theoretical level by more than 1.5 times

3) The traditional equipment is simple, and it is produced in a single intermittent manner. Each furnace needs about 40 hours for a cycle from heating, reaching the gas filling temperature, gas filling, natural cooling, and finally out of the furnace. The production efficiency is extremely low. Large power consumption

4) The by-product (hydrofluoric acid) after fluorination is directly discharged into the air, seriously affecting the working environment and air quality of operators

5) Because traditional equipment works under frequent hot and cold conditions, the anti-corrosion measures of the inner lining shorten the service life and require frequent replacement, resulting in large equipment loss

low reliability

6) The low recovery rate of fluorinated products seriously affects the waste of rare earth resources

In summary, it leads to the inability to achieve environmentally friendly production and stable quality output of fluoride products, lack of market advantages, and affect the development of enterprises

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