Electric arc furnace vacuum magnesium smelting system and magnesium smelting method thereof

Abstract

The invention discloses an electric arc furnace vacuum magnesium smelting system. The electric arc furnace vacuum magnesium smelting system is characterized by comprising a grinding system, a preheating-decomposition system, a calcination system, a secondary heating system, a vacuum reaction system and a condensate collection system which are sequentially connected with one another. A magnesium smelting method of the electric arc furnace vacuum magnesium smelting system comprises the following stages: preliminary preparation; electric arc furnace vacuum magnesium smelting; and startup and shutdown after reaction completion. The electric arc furnace vacuum magnesium smelting system and the magnesium smelting method disclosed by the invention have the advantages that magnesium-containing powder obtained after grinding, decomposition and heating is subjected to vacuum treatment in a molten pool where iron is molten into liquid iron, and then argon gas is injected and high-temperature magnesium powder is sprayed, so that magnesium steam is generated after reduction; after collection and condensation, the magnesium steam turns into liquid magnesium to form rough magnesium; then, a magnesium ingot is cast through refining; the production process is reasonable, compact, matching in equipment, complete in technology, rapid in reaction process, short in time and high in production efficiency; and the production cost is reduced by 1/3 or above.

Description

technical field [0001] The invention relates to a metal smelting system and a method thereof, in particular to an electric arc furnace vacuum magnesium smelting system and a magnesium smelting method with high yield, low cost and less environmental pollution. Background technique [0002] Magnesium is an extremely abundant metal element in the earth, accounting for about 2.1% to 2.7% of the total mass of the earth. my country has the largest reserves of magnesium resources in the world. At present, tens of billions of tons have been proven. Magnesium and magnesium alloys have small specific gravity, high strength, good shock absorption, impact resistance, good machinability, good thermal conductivity, can be recycled and reused, have less environmental pollution, have excellent environmental advantages and performance advantages, and have a wide range of applications. It is a rare metal that can be recycled. Vigorously developing the magnesium industry has obvious resource...

AI Technical Summary

Problems solved by technology

①The heat conduction radius is large, the heat loss is large, the environment is seriously polluted, and the reduction time is long for 12-14 hours; ②All manual operations, the labor intensity of the on-site workers is high, and the efficiency is low; ③The production cost is high, mainly due to high energy consumption and high cost of the reduction tank , low yield, unsatisfactory economic benefits; ④ can not form large-scale continuous production, does not meet the requirements of modern large-scale industrial development

Aiming at the current backward magnesium smelting technology and production defects, the point of view of molten silicothermal reduction magnesium smelting was put forward. However, due to the restriction of the circulation mechanism of single and double dipping tubes, the volume of the silicon thermal bath is extremely high, and the heating is difficult. The continuous production is not possible, the site requirements are harsh, the investment and production scale are extremely large, and in the environment exposed to the atmosphere, the yield of magnesium metal is low

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