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What is the range of efficiency of cupola furnace?

What is the range of efficiency of cupola furnace?

What is the range of efficiency of cupola? Explanation: The efficiency of cupola is decided by factors like heat used in preheating, heat used in coke, heat used in oxidation and heat in the air blast. The efficiency of a cupola varies from 30% to 50%.

What is the function of the cupola furnace?

Cupola furnace, in steelmaking, a vertical cylindrical furnace used for melting iron either for casting or for charging in other furnaces.

How hot can a melting furnace get?

The highest temperature typically reached in open air is about 3300°F for a platinum melt. In controlled atmospheres, heating of graphite can achieve temperatures in excess of 5000°F.

What is flux in cupola furnace?

Limestone is added to act as a flux. As the heat rises within the stack the metal is melted. It drips down through the coke bed to collect in a pool at the bottom, just above the bottom doors. During the melting process a thermodynamic reaction takes place between the fuel and the blast air.

Which fuel is used in cupola furnace?

Based on its principle, the cupola furnace is a shaft melting furnace, it is filled with fuel (coke), metal charge (pig iron, circulation material, scrap steel) and slag-forming additives (limestone) from the top.

What charge is used for cupola furnace?

(iii) Charging the Cupola: The charge is composed of 25% pig iron, 50% gray cast iron scrap, 10% steel scrap, 12% coke as fuel, and 3% limestone as flux. These constituents form alternate layers of coke, limestone and metal.

What are the advantages and disadvantages of cupola furnace?

Advantages of Cupola Furnace:

  • For operation purposes, this is a simple and economical device.
  • A wide range of materials can be melt.
  • This device used for removing the slag present in the Iron.
  • Comparison of electric furnace This is very less harmful.
  • This is having high melting heat I.e 100 tones/hr.

What temp does gold melt?

1,064 °C
Gold/Melting point

What is the difference between cupola furnace and blast furnace?

Basic chage for cupola consists of foundry coke layers and layers of pig iron, steel scrap, home returns and it is only used for melting . Where as blast furnace is a smelting furnace which means it is used for extraction of iron from ores.

What is the maximum capacity of cupola furnace?

The capacity of a cupolette ranges from 0.5 ton to 1 ton. These cupoletes have a height of about 4.5 meters to 6 meters. 7. Cupola produces metal of uniform quality.

What is the cupola furnace explain with diagram?

The Cupola furnace works on the principle where we generate heat from burning coke and when the temperature of the furnace is above the melting point of the metal then the metal is melt. The charge introduced in the cupola consists of pig iron, scrap, casting rejection, coke, and flux.

How big can a cupola furnace be used for?

Cupola Furnace is a melting device used to melt cast iron, Ni-resist iron, and some bronzes and It is used in Foundries. The cupola can be made of any size and the size of the cupola is measured in diameters which range from 1.5 to 13 feet.

Where is the cupola furnace in Michigan located?

Cupola furnace. A small cupola furnace in operation at Wayne State University, in Detroit, Michigan. A cupola or cupola furnace is a melting device used in foundries that can be used to melt cast iron, Ni-resist iron and some bronzes.

What kind of metal can you melt in a cupola furnace?

The cupola is a most widely used foundry furnace for melting ferrous metals and alloys. Sometimes, it is also used for melting non-ferrous metals and alloys. Cupola furnace is the cheapest means for converting pig iron or scrap metal into gray cast iron.

How is coke used in the cupola furnace?

In the cupola furnace, several chemical and thermodynamic processes take place. Coke is most frequently used as an energy source; however, electric and gas furnaces are also used for melting rocks. Melting furnaces serve not only for melting rocks, but also for reaching the homogeneity of melts in the temperature range 1400−1600°C.