A kind of vacuum induction furnace magnesium smelting system and magnesium smelting method thereof

Abstract

The invention discloses a vacuum induction furnace magnesium smelting system which is characterized by comprising a grinding system, a preheating and decomposing system, a calcination system, a secondary heating system, a vacuum reaction system and a condensation and collection system that are sequentially connected. The magnesium smelting method of the vacuum induction furnace magnesium smelting system comprises three steps of preliminary preparation, induction furnace vacuum magnesium smelting, and completion and machine starting and stopping. Magnesium-containing powder after being ground, decomposed and heated is subjected to vacuum treatment, then argon gas is inflated into a molten pool in which ferrosilicon is molten to be liquid, the magnesium-containing powder is sprayed into the molten pool and is reduced to generate magnesium steam, after the magnesium steam is collected and condensed, the magnesium steam is changed to magnesium liquid to form crude magnesium, and crude magnesium is refined to form a magnesium ingot. A production process is reasonable and compact; equipment is matched; a technology is complete; a reaction process is rapid; the time is short; the production efficiency is high; and the production cost is reduced by above 1 / 3.

Description

technical field [0001] The invention relates to a metal smelting system and a method thereof, in particular to a vacuum induction furnace 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 adv...

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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