Device for production of magnesium by thermite process and magnesium production process

Abstract

The invention discloses a device for production of magnesium by a thermite process. The device comprises a vacuum induction furnace, a vacuumizing device and a condensation collecting system. A feeding system is arranged at the top of the vacuum induction furnace, a residue collecting system is arranged at the bottom of the vacuum induction furnace, the condensation collecting system comprises a condensation pipe and a collecting tank, the first end of the condensation pipe communicates with the vacuum induction furnace, and the second end of the condensation pipe communicates with the collecting tank. During magnesium production, raw materials for magnesium production are first filled in the vacuum induction furnace through the feeding system, then the vacuum induction furnace is vacuumized by means of the vacuumizing device, the vacuum induction furnace is heated to the reaction temperature, magnesium oxides are reduced to produce magnesium vapor, the produced magnesium vapor is cooled by the condensation pipe and conveyed to the collecting tank for condensation, after the reduction reaction is over, waste slag in the vacuum induction furnace can be discharged from the bottom through a slag collecting system, feeding and deslagging are easy and convenient, time and labor are saved, and the efficiency is high. The invention further discloses a magnesium production process forproducing magnesium by using the device for production of the magnesium by the thermite process.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to an aluminothermic magnesium smelting device. In addition, the present invention also relates to a magnesium smelting process using the aluminothermic magnesium smelting device to produce magnesium. Background technique [0002] Magnesium is an extremely abundant metal element in the earth. Magnesium and magnesium alloys have the characteristics of light specific gravity, high strength, good shock absorption, good machinability, good thermal conductivity, and recyclability, and have good environmental and performance advantages. It has a wide range of applications and a huge market demand. [0003] The production methods of magnesium mainly include electrolysis and thermal reduction. At present, 85% of the world's magnesium is produced by the silicothermal reduction method (ie Pidgeon method) in the thermal reduction method. The main principle is to use ferrosilicon reducing ...

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Problems solved by technology

[0004] The silicon thermal reduction method is a solid-state reaction, which has many disadvantages: ① large heat conduction radius, large heat loss, serious environmental pollution, and long reduction time, about 12-14 hours; ② all manual operations, the labor intensity of on-site workers is high, and the efficiency is low ; ③ high energy consumption, high cost of reduction tank, low yield, waste slag cannot be comprehensively utilized, resulting in high overall production cost; ④ large-scale continuous production cannot be formed, and does not meet the requirements of modern large-scale industrial production

[0005] In addition, when using the existing Pidgeon process magnesium smelting plant to produce magnesium, it takes a lot of time to load the reaction materials into the horizontally arranged reaction chamber, and when the reaction chamber is heated, it is necessary to set the reaction chamber in multiple stages Insulation measures are taken to ensure the temperature stability in the reaction chamber and ensure the normal progress of the reaction. This will cause the cost of installing an insulation layer to be too high. The magnesium vapor generated during the production process cannot condense at the same time after entering the condensing device, resulting in Magnesium will be scattered in the condensing device, which is not easy to collect. After the reaction is completed, it takes a lot of time to clean up the waste in the reaction chamber, resulting in low production efficiency

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