| http://www.w3.org/ns/prov#value | - A method for adding powdered material to a bath of molten electrolyte in an electrolysis cell, said cell including an anode and a cathode to perform electrolysis of said powdered material in molten electrolyte, said method comprising intermittently feeding said powdered material and a gas through a duct formed in said anode, said gas being substantially inert with respect to said molten material a
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