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Method for Melting and Refining Aluminum Alloy by Using Intermediate Frequency Furnace-Smelting Furnace Dual Combination Electromagnetic Stirring

An electromagnetic stirring and intermediate frequency furnace technology, which is applied in the field of aluminum alloy melting, can solve the problems of incompatibility with multi-series, small batch, high-quality aluminum alloy production, complex operation procedures, long melting time, etc., and achieve flexible and changeable product structure. , the effect of protecting the ecological environment and reducing energy consumption

Active Publication Date: 2018-03-09
YUNNAN RUNXIN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high melting point of most aluminum alloy elements, there are problems such as long melting time and easy composition segregation when adding aluminum melt in the state of single metal, so the traditional aluminum alloy smelting and refining process generally needs to add the aluminum required for the preparation of the master alloy. Alloy products, but the intermediate alloy needs to be re-melted and heated during the process, which has the disadvantages of large energy consumption, environmental pollution, complicated operation procedures, long melting time, and low production efficiency. It is not suitable for multi-series, small-batch, high-quality aluminum alloy production.

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  • Method for Melting and Refining Aluminum Alloy by Using Intermediate Frequency Furnace-Smelting Furnace Dual Combination Electromagnetic Stirring

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Effect test

Embodiment 1

[0018] A method for smelting and refining aluminum alloys using an intermediate frequency furnace-smelting furnace combined with electromagnetic stirring, such as figure 1 As shown, the method steps are as follows:

[0019] (1) According to the composition requirements of aluminum alloy products, solid silicon and electrolytic primary aluminum liquid are added to the intermediate frequency furnace, the electromagnetic stirring and heating device of the intermediate frequency furnace is turned on, and the frequency of the intermediate frequency furnace is kept at 350Hz and the temperature is 745°C. The solid silicon melts quickly to form a stable chemical composition Al-Si intermediate aluminum alloy melt;

[0020] (2) The raw aluminum liquid produced by 1 ton of aluminum electrolytic cell is directly introduced into the melting furnace through siphon, and the temperature of the raw aluminum liquid is kept at 745°C, and the Si intermediate aluminum alloy melt in the intermediat...

Embodiment 2

[0025] (1) Add solid silicon, metallic copper and electrolytic primary aluminum liquid into the intermediate frequency furnace, turn on the electromagnetic stirring and heating device of the intermediate frequency furnace, and keep the frequency of the intermediate frequency furnace at 350Hz and the temperature at 760°C, so that the solid silicon and metallic copper can be quickly melted and dissolved to form chemical components Stable Al-Si-Cu intermediate aluminum alloy melt. Metal silicon, metal copper and other alloy components are all purchased products, and the specific requirements and addition methods are determined by the grade of aluminum alloy to be produced;

[0026] (2) The raw aluminum liquid produced by 1 ton of aluminum electrolytic cell is directly injected into the melting furnace by siphon, and the temperature of the raw aluminum liquid is kept at 760°C. The Al-Si-Cu intermediate aluminum alloy melt in the intermediate frequency furnace is transferred into t...

Embodiment 3

[0030] (1) Add solid metal copper and electrolytic primary aluminum liquid into the intermediate frequency furnace, turn on the electromagnetic stirring and heating device of the intermediate frequency furnace, and keep the frequency of the intermediate frequency furnace at 350Hz and the temperature at 730°C, so that the metallic copper can be melted and dissolved quickly to form Al-Cu with stable chemical composition Intermediate aluminum alloy melt. Metal copper is an outsourced product, and the specific requirements and addition methods depend on the grade of aluminum alloy to be produced;

[0031] (2) The raw aluminum liquid produced by 1 ton of aluminum electrolytic cell is directly injected into the melting furnace by siphon, and the temperature of the raw aluminum liquid is kept at 730°C. The Al-Cu intermediate aluminum alloy melt in the intermediate frequency furnace is transferred into the melting furnace through the first chute, the electromagnetic stirring device in...

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Abstract

Provided is a method for smelting and refining aluminum alloy through electromagnetic stirring of combination of an intermediate frequency furnace and a smelting furnace. The method comprises the steps that firstly, solid intermediate alloy and electrolytic aluminum liquid are added to the intermediate frequency furnace, an electromagnetic stirring and heating device is started, and the solid intermediate alloy and the electrolytic aluminum liquid melt quickly to form intermediate aluminum alloy melt; the electrolytic aluminum liquid is led to the smelting furnace through siphon, the temperature of the electrolytic aluminum liquid is maintained to be 730-760 DEG C, the intermediate aluminum alloy melt in the intermediate frequency furnace is transferred into the smelting furnace, an electromagnetic stirring device at the bottom of the smelting furnace is started, the intermediate alloy melt is evenly and sufficiently fused with the electrolytic aluminum liquid, and accordingly aluminum alloy melt with qualified chemical ingredients is formed; a fluxing medium is added to the aluminum alloy melt in the smelting furnace, and drossing is carried out to remove impurities; a refining agent is blown into the aluminum alloy melt via argon after drossing, powder injection refining is carried out, the fluxing medium is added again, drossing is carried out, and pure aluminum alloy melt is obtained; and then the pure aluminum alloy melt is transferred to a chute for casting. The method is short in flow, efficient, environmentally friendly, convenient to implement and suitable for smelting and refining of small-batch, multi-series and high-quality aluminum alloy.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy smelting methods, in particular to a method for melting and refining aluminum alloys by using an intermediate frequency furnace-smelting furnace combined with electromagnetic stirring. technical background [0002] The traditional aluminum alloy smelting and refining process is generally carried out in a melting furnace. Generally, a large amount of aluminum liquid is injected into the melting furnace, and then a solid master alloy containing different elements is added for batching, and the aluminum alloy melt is heated to The smelting and refining temperature, and then adding grain refiner and refining agent to the molten aluminum for powder spraying and refining, to provide aluminum alloy melt with qualified composition, temperature and purity for the casting process. Due to the high melting point of most aluminum alloy elements, there are problems such as long melting time and easy comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C1/06C22C21/02
CPCC22C1/026C22C1/03C22C1/06C22C21/02
Inventor 杨叶伟江俊周金全段开旺陈本松
Owner YUNNAN RUNXIN ALUMINUM