Problem2
A copper smelter smelts the ore of the following composition given below in weight percent:
 . Limestone of composition
 and  is one-fifth of the weight of the ore. The coke is  of the ore and its ultimate analysis is  . During smelting  of the total sulphur charged is oxidized as  . The analysis of dry flue gas (In Volume %)  No copper is lost in slag and ignore the flue dust.
Determine (for 1000kg ore):
a) The weight of matte and its grade,
b) Weight and composition of slag,
c) Volume of gases (dry), calculated from sulphur and carbon content,
d) Cubic meter of air.
Solution:
Basis is 1000kg ore.
Matte consists of .Cu2S+ Fes
Performing S balance and  balance one can find S combined with  and then amount of FeS
Weight of matt  and its Grade is 
Slag consists of  and  , since all  does not enter into matte.
One can find weight of each component
Weight of slag is 
SiO2 |
41.6% |
Al2O3 |
5.5% |
CaO |
20.7% |
FeO |
32.2% |
|
Volume of gases
On performing S and C balance
 .
|
