Parts of Cupola Furnace Part-2

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Parts of Cupola Furnace:

 Parts of Cupola Furnace

5. Air Blower:
An air blower is connected to the wind box by means of blast pipe. It supplies the air to the wind box. A valve is provided within the blast pipe to regulate the flow of air. The blast pressure varies from 250 kg/m2 to 1050 kg/m2.
6. Volume Meter:
The volume meter is installed during a cupola furnace to understand the quantity of air passing. The amount of air needed to melt one tone of iron depends upon the standard and quantity of coke and coke iron ratio.
7. Tuyeres:
Air, which is required for the combustion is blown through the tuyeres located about 36 inches (0.9 m) above rock bottom of the furnace. Total area of the tuyeres should be 1/5 to 1/6 of the cross-section area of the cupola inside the liner at tuyere level.

8. Tap Hole:
Slightly above rock bottom and within the front there are a faucet hole to permit molten forged iron to be collected.
9. Slag Hole:
There is also a slag hole located at the rear and above the extent of the faucet hole because slag floats on the surface of molten forged iron .
10. Chimney:
The portion of shell above charging hole is understood as chimney. Its height is generally 4 to 6 m. The chimney is given a filter screen and a spark arrester. This facilitates a free escape of the waste gases and deflects the sparks and therefore the dust back to the furnace.




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