In this process, a small amount of calcium chloride is added to lower the melting point of the compound involved.  
In this process, a small amount of calcium chloride is added to lower the melting point of the compound involved.  It occurs in a cylindrical steel cathode surrounding a central graphite anode, with the released chlorine led away by a hood over the anode and the molten element this process is designed to extract collected through another hood around the top of the cylinder.  FTP, what is this electrolytic process for extracting sodium from sodium chloride?
In this process, a small amount of calcium chloride is added to lower the melting point of the compound involved.  
Downs process