1823.] 



Process of smelting Copper. 



115 



Fig. 1. 



Kg. 2. 



r — H 



a. Hearth or body of furnace. 



b. Bridge. 



c. Fire place. 



d. Flue. 



e. Stack, or chimney. 

 f. Tapping hole. 



g. Skimming door in melting furnace. 

 h h h h. Stirring doors in calciner. 



The processes are conducted in the following order 



1. The copper ore calcined. 



2. Calcined ore melted. 



3. Coarse* metal from Process 2, calcined. 



4. Calcined coarse metal melted. 



5. Finef metal from Process 4 calcined. 



6. Calcined fine metal melted. 



7. Copper from Process 6 roasted. 



8. Coarse or blistered copper refined. 



Metal, means sulphuret when thus used ; and coarse metal, sulphuret of copper and 



iron. 



t Fine metal, ditta with larger proportion of copper. 



i2 



