Vacuum atmosphere melting furnace for high purity magnesium and melting process thereof

Abstract

The invention comprises a vacuum atmosphere melting furnace for high purity magnesium and a melting process thereof. The vacuum atmosphere melting furnace comprises a control mechanism, a support frame body and a vertical double-layer shell body. A main heating assembly is arranged in the vertical double-layer shell body. A feeding inlet is formed in the top of the vertical double-layer shell body, and a heat stop valve is arranged at the feeding inlet. A vacuum assembly connector, an inert gas inlet, an additive inlet and a discharge outlet are formed in the top of the vertical double-layer shell body, wherein the vacuum assembly connector is connected with a vacuum supply assembly arranged outside, the inert gas inlet is connected with an inert gas source arranged outside. And the vertical double-layer shell body is also provided with an internal multi ring stirring assembly for stirring internal materials. According to the vacuum atmosphere melting furnace for high purity magnesiumand the melting process thereof, conventional melting furnace structure and melting process are improved, the melting production of magnesium crystal with energy saving, high efficiency, high degree of automation and safety and reliability can be realized under the condition of relatively low melting temperature and atmosphere protection, and therefore high purity metal magnesium liquid is prepared for subsequent smelting.

Description

technical field [0001] The invention relates to the technical field of industrial magnesium purification equipment, in particular to a vacuum atmosphere melting furnace for high-purity magnesium and a melting process thereof. Background technique [0002] Magnesium alloy is a high-performance light-weight structural material made of magnesium. Its specific gravity is similar to that of plastic, and its rigidity and strength are no less than that of aluminum. It has strong shock resistance, anti-electromagnetic, thermal conductivity, and electrical conductivity. Magnesium alloy is light in weight, its density is only 1.7 kg / m3, which is 2 / 3 of aluminum and 1 / 4 of steel, its strength is higher than that of aluminum alloy and steel, and its specific stiffness is close to that of aluminum alloy and steel. Excellent castability and dimensional stability, easy processing, low scrap rate, good damping coefficient, greater than aluminum alloy and cast iron, very suitable for the pro...

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Problems solved by technology

[0005] At present, the containers used for smelting metal magnesium in the prior art mainly include low-carbon steel crucibles and stainless steel containers. These equipment usually have the following significant defects when smelting or melting high-purity metal magnesium: 1. Due to the existing The melting equipment is only heated outside the equipment, the heat conduction efficiency is low, and the heat loss is large, while the low-carbon steel crucible and stainless steel container have poor corrosion resistance at high temperature, and impurities in the container are prone to contaminate magnesium metal; 2. Magnesium metal The melting process is usually carried out in the air, and the metal magnesium at high temperature is easy to oxidize due to its active chemical properties. In order to prevent the oxidation of metal magnesium, it is necessary to add covering agent and nitrogen, and the covering agent will also bring secondary pollution; 3. The existing melting equipment has low melting efficiency, resulting in a long preparation process cycle, and the equipment is usually large in size, and its safety cannot be guaranteed

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