Types of Metal Melting Furnaces


People have been casting metal since at least 3000 B.C.E. Over time, the practice became more and more sophisticated as our understanding of metal and its properties became clearer. There are different types of melting furnaces, some of which are of varying degrees of technology.

Cupola Furnace

  • One of the oldest style of melting furnaces, the cupola furnace, has a tall, cylindrical shape. The insides of these furnaces are lined with clay, blocks or bricks which protect the furnace's interior from heat, abrasion and oxidation. To melt the metal in the furnace, workers add layers of metal such as ferro alloys, limestone and coke. The limestone reacts with the metal, making the impurities float up to the surface of the melting metal.

Induction Furnace

  • Induction furnaces use alternating currents to create the necessary heat with which to melt the metal. The refractories, or the lining, of these are made from materials such as alumina, silica and magnesia. These furnaces work well for melting metal such as iron as well as metals that are nonferrous. Inside the induction furnaces are copper coils which are cooled with water.

Electric Furnaces

  • These furnaces are often used in steel mills as well as foundries. Metal and additives are poured into the furnace. The additives help to separate the impurities present in the metal. The furnace melts the metal through the use of granite or carbon electrodes which create an electric arc.

Hearth Furnace

  • A hearth furnace works well for melting small quantities of nonferrous metal. These furnaces use natural gas or electricity to produce heat by which to melt the metal.

Related Searches


  • Photo Credit Pyrite (fool"s gold) isolated on white image by Tamara Kulikova from Fotolia.com
Promoted By Zergnet


You May Also Like

  • Different Types of Metal Casting

    Some casting techniques are simple and can be easily mastered by hobbyists and craftsmen who are willing to operate a furnace and...

  • Types of Gas Furnaces

    There are several different types of gas furnaces in operation in American homes. Because new models are more energy efficient, they may...

  • How to Melt Metal for Casting

    Low-melting-temperature metals, such as lead, pewter and tin, melt under the heat of the focused flame of a blowtorch, but metals with...

  • How to Make a Metal Casting Furnace

    This furnace can be used to melt a variety of metals, such as bronze, gold, silver, brass and pewter. Molds for metal...

  • How to Build a Furnace for Melting Aluminum

    Working with aluminum can be a rewarding hobby. Most people can't say that they create works of art out of metal. The...

  • How to Make a Small Furnace

    A furnace is used for many different types of work, including blacksmithing, metal smelting and even glass production. A furnace is extremely...

  • How Do I Compare Electric Arc Furnaces and Blast Furnaces?

    Both blast and electric arc furnaces are used in industrial settings to heat and mold metal. A blast furnace is used to...

  • Gas Furnace Vent Pipe Types

    Using the correct piping materials with your gas furnace is more important than you may realize. As gas is burned, it produces...

  • How a Blast Furnace Works

    A blast furnace derives its name from the way in which it's heated. In most types, pre-heated air of about 1,800 degrees...

  • Types of Induction Furnaces

    Induction furnaces are one type of furnace that foundries use to melt metal. An induction furnace has a primary coil that produces...

  • Types of Industrial Furnaces

    Some industrial furnaces generate heat to warm people in buildings, others to melt metal. They come in many different models to perform...

Related Searches

Check It Out

Are You Really Getting A Deal From Discount Stores?

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!