Illustration 1

Equation 6 considers pure  as liquid product. On the demand side we can add more terms depending on the conditions.

a) Calculate heat demand kj /kg mole  when pure c and pure  enter at  and liquid Fe exits at

b) Let iron contains . Neglecting heat of mixing .

Enthalpy of
Enthalpy of .

c) Let us consider that

.

Heat demand in addition to  consist of enthalpy of Mn, enthalpy of Si and heat required to reduce  and  to Si and Mn respectively.

Heat demand   mole of iron.

Coupling of material and heat balance

In lecture 31, material balance equation was

(7)

(8)

By equations 7 and 8

(9)

If  and D are specified, then specification of either  fully defines blast furnace operation