Blast rate

Blast rate and cokecharge determine the melting rate of the cupola furnace.

It is generally incorrect to considerblast pressure and blast rate as two separate factors since the pressure is closely associated with the rate; and at a given furnace construction and a given fragmented size of the charge, no factor can be influenced without changing the other factor.

In most cases, cupola furnaces are operated at a certain blast rate, and the blast pressure is calculated on the basis of the furnace construction and the fragmented size of the charge.

Additional references:
Cupola furnace network diagram