A furnace helps in igniting a material in order to shape and forge its properties and to melt the metals for casting purposes. They are a type of an oven. Its structure is enclosed on the inside where the material is subjected to excessive heat. It is equipment which is designed to heat water or air and is circumvented throughout a building in a heating system. Now, let’s acquaint ourselves with furnaces classification.
- Blast furnace
It is a special kind of furnace which is helpful in making iron from its ore. With its dimensions as 60 meters tall and 15 meters in diameter, they are deemed as the largest chemical reactors and high ovens. The blast furnace is designed of steel case and bricks that are constructed of magnesia which is quite heat resistant and doesn’t melt at all. Then, the furnace is cooled down with water that flows inside the case and bricks. The procedure for making iron ore is simple and it is usually iron ore. Iron is obtained from it by eradicating the oxygen. Pig iron is left over which is, in other words, crude iron oxide. The process removes oxygen which then uses carbon to ignite the ore to higher temperatures.
- Open hearth furnaces
This process is also known as Siemens-martin process, that is, steel making technique of the twentieth century. This process centralizes on raising the temperature in a metallurgical furnace that utilizes the waste heat emitted from the furnace that let the fumes flow from the furnace via a brick checker work. The brick is subjected to excessive heat and then the furnace. The device is primarily used to produce steel that is ignited with pig iron and wrought iron with their scrap along.
- Induction furnace
Induction heating directs the ignition needed for the electric furnace. This furnace offers clean, energy efficient and well-coordinated process of melting when posed in comparison with other methods. Almost every modern industry use this kind of furnace rather than cupolas to melt cast iron as the former case leaves out a lot of dust and other pollutants as well. The capacity is prone to be ranging from less than a kilo to a 100-ton capacity that is utilized in melting iron, aluminum, copper, steel and other valuable elements. As the process doesn’t utilize combustion, the temperature of the material is not higher than it is required to melt it.
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