The Complete Guide to Aluminum Furnaces


Non-ferrous metals are melted in cylindrical furnaces called “rotary melting furnaces” that have two holes in each end. Iron, lead, zinc, and copper are other metals that can be processed in these furnaces. A rotary furnace can be utilized for metals whose melting temperatures are close to one another. However, because of its properties, aluminum has a unique rotary furnace. According to a professional performing furnace installation in Toronto, recycling aluminum is the major material used in aluminum rotary melting furnaces because it can be produced with high productivity.

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Building of an Aluminum Melting Furnace

There are multiple layers to the aluminum rotary melting furnace. Steel makes up the exterior layer, and alumina and silica, both heat-resistant materials, make up the interior layer. As a result of the huge diameter of these layers, the furnace’s inner and outer diameters diverge.

The slow melting layer, combustion, and melting make up the three components of the aluminum rotary furnace. Bricks of refractory material make up the slow melting layer in other furnaces used for metals like lead and copper. However, all furnaces have the same components for melting and combustion. Heat is produced during the combustion process when oxygen gas and fuel interact. The heat in the furnace’s lower section causes the aluminum to melt. The smooth and regular movement of the furnace is an advantage of the aluminum rotary furnace since it facilitates the melting of all raw materials.

Rotating furnaces for melting aluminum move at a 1.1 meters per-minute speed. Experience dictates how long aluminum melts in these furnaces, although mathematics can predict that it will take 4 to 5 hours. The end of the furnace is open, allowing the gases produced by melting and burning to be removed.

Energy Use in a Rotary Furnace for Aluminum

Energy consumption is a major issue in induction furnaces and crucibles, which have a limited volume and significant energy consumption, prompting industries to search for energy optimization. Industrial smelting furnaces, like iron smelting furnaces, are particularly energy inefficient. Since the furnace is permanent, it takes a long time to melt all the ingredients. Thus, induction and crucible furnaces generally cannot operate at high volumes.

A rotating kiln has been used to overcome this issue, as well as the optimization of time and energy. The rotary kiln has a high capacity and may be produced in big sizes. Additionally, the aluminum rotary furnace’s refractory coating reduces energy usage. In this manner, the slowly melting layer can retain heat within itself and transfer that heat to the molten substance when it comes into contact with it. By doing this, the interior of the oven is kept from losing heat.

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Aluminum Melting Furnaces’ Different Classes

Based on the type of application, aluminum furnaces are categorized into three groups:

  • Furnaces that recycle and melt trash
  • Furnaces that create alloys out of various metals
  • The creation of molten metal in furnaces for casting.

Other types of Metal Melting Furnaces:

Most manufacturers employ electric, Bush, cupola, and induction furnaces for melting iron and steel. As a result of their unique technologies, each of these furnaces can be used in various settings and with varying levels of output.

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