What is the role of silica in the metallurgy of copper?

What is the role of cryolite in the metallurgy of aluminium ?

What is the role of placenta?

CO is used in the metallurgy of :

What is the role of Torque?

What is the role of lime stane in the extraction of iron ?

Describe the role of cryolite in the metallurgy of aluminium. Write the chemical equations for the involved reactions.

What is the role of lime stone in the extraction of iron ?