Method and device for intermittently and continuously smelting crystallized magnesium by Pidgeon process reduction tank

Abstract

The invention discloses a method and a device for intermittently and continuously smelting crystallized magnesium by a Pidgeon process reduction tank. The method comprises the following steps that raw materials in a stock bin are intermittently reacted in batches by using an electronic valve, and a feeding replacement bin and the reduction tank are vacuumized; the raw material pellets in the stock bin enter a spiral feeder and are pushed to a reaction area of the reduction tank; raw material pellet magnesium oxide is replaced by silicon to form magnesium steam, and the magnesium steam enters a crystallization area to form crystallized magnesium which is collected; and reaction waste in the reaction area is pushed by continuously entering raw material pellets to move to the transition area and enter the replacement bin, and the waste is cooled, falls into a slag bin and is moved out. By adding an automatic feeding device and an automatic discharging device and arranging the vacuum tank transition area, intermittent continuity of the transverse tank magnesium smelting process is achieved, the magnesium metallurgy efficiency is improved, then energy consumption is reduced, cost is reduced, pollution is eliminated, the environment is improved, and the service life of the reduction tank is prolonged.

Description

technical field [0001] The invention relates to a magnesium metallurgical process, in particular to a batch-type continuous smelting method for crystalline magnesium in a Pidgeon reduction tank. Background technique [0002] There are two main methods of smelting magnesium: thermal reduction and electrolysis. Due to the high cost of the electrolysis method, it was gradually replaced by the thermal reduction method after the 1990s. The most important method of thermal reduction magnesium smelting is the Pidgeon method. The Pidgeon process is a low-cost and widely used magnesium smelting process in the world. The brief process of Pidgeon method for smelting magnesium is dolomite calcination, raw material preparation, reduction, refining, etc., and the core process is reduction. In view of the above-mentioned problems in magnesium smelting by Pidgeon method, various researches have been carried out at home and abroad. In order to facilitate continuous feeding, on the basis o...

AI Technical Summary

Problems solved by technology

[0005] 1. High energy consumption, about 4.5tce / tMg;

[0006] 2. The life of the reduction tank is short, about 3 months;

[0007] 3. The degree of mechanization is low, and continuous operation cannot be performed;

[0008] 4. Too much labor, high labor intensity, poor production environment and low efficiency

However, the material balls are fragile when charging, and the degree of reaction of the material balls is not complete when the slag is discharged, and the continuous feeding and discharging does not really effectively shorten the reaction time. These are the defects in the continuous feeding and discharging of the vertical Pigeon furnace.

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