Illustration- 2

The exit gas composition from a  charged furnace is . The air blast is  of product Fe. The hot metal contains . Calculate

a) Quantity of active carbon in kg | ton Fe

b) Total carbon in kg

Solution

We know

(1)

Oxygen from blast moles .

oxygen atom /mole Fe.

(2)

We get .
Substituting the value of in equation 1 we get





C in

Alternatively one can plot ) against.

.

At

The straight line gaining the values of  is the operating line of the furnace. Its slope is
Plot yourself as an exercise.

.