Vertical magnesium reduction furnace and technological process thereof

Abstract

The invention belongs to the technical field of magnesium metal reduction production, and particularly relates to a vertical magnesium reduction furnace which is short in reduction time and high in production efficiency and a technological process of the vertical magnesium reduction furnace. The vertical magnesium reduction furnace comprises heating furnaces and reduction tanks. Each heating furnace comprises a plurality of heating modules arranged inside by side. The plurality of reduction tanks arranged in a matrix mode are arranged in each heating module, the upper ends of the reduction tanks penetrate through and extend out of the upper ends of the heating furnaces, condensation section pipes of the reduction tanks are located above the heating furnaces, the lower ends of the reductiontanks penetrate through and extend out of the bottoms of the heating furnaces, openings are formed in the lower ends of the reduction tanks, the lower ends of the reduction tanks are connected with cooling tanks, conveyors are arranged below the cooling tanks, the plurality of heating furnaces are sequentially arranged side by side to form a heating layer, and an operation layer is arranged abovethe heating layer.

Description

technical field [0001] The invention belongs to the technical field of metal magnesium reduction production, and in particular relates to a vertical magnesium reduction furnace and a process flow thereof. Background technique [0002] The Pidgeon method of magnesium smelting refers to the method of reducing calcined dolomite to metallic magnesium with ferrosilicon reducing agent in a reduction furnace with feeding in the reduction tank and heating outside the tank; in the existing production, the The calcined dolomite and a certain amount of ferrosilicon reducing agent are mixed and pressed into pellets, and the pellets are placed in a reduction tank, which is evacuated to a vacuum below 10 Pa; the reduction tank is placed in a heating furnace ( Also known as reduction furnace), the temperature of the heating furnace is controlled at 1473K, so that the dolomite (MgO+CaO) in the pellet material and the ferrosilicon undergo a reduction reaction, and the generated metal magnesi...

AI Technical Summary

Problems solved by technology

[0007] 1. The diameter of the reduction tank is generally about 55cm, and the reduction time is generally 16 hours. The main reason for this is the large size of the reduction tank and poor thermal conductivity of the material

[0008] 2. After the reduction reaction is completed, the reduction slag is generally discharged directly from the bottom of the reduction tank into the container, and then the reduction slag is transported to the storage site using a forklift, or a conveyor belt is set under the reduction tank, and the reduction slag is directly discharged from the reduction tank to On the conveyor belt, it is transported through the conveyor belt; due to the high temperature of the reducing slag, it will cause damage to the conveyor belt and affect the service life of the conveyor belt. After the reducing slag is discharged, the reduction tank is hollow, and the pellets will fall from a high place when filling again. , easy to break, affecting the reduction reaction. In the existing production, in order to prevent the pellets from breaking, slag filling is required before each feeding, that is, the bottom of the reduction tank is filled with a layer of reducing slag. The addition of this process seriously affects the production efficiency. At the same time Because the slag filling occupies the inner cavity space of the reduction tank, the reduction of pellets participating in each reaction is caused;

[0009] 3. The operation of each process in the entire magnesium reduction production is complicated, and manual operations are required for loading, opening cans, etc., the labor intensity of the staff is high, and the production efficiency is low

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