The smelter smelts the copper concentrate mixed with silica in the Isasmelt furnace [REF].
In the refinery, copper anodes coming from the smelter are electro-refined to produce cathodes having 99.99% Cu and conforming to LME grade A. This is done by putting anodes and cathodes alternately in a cell, in which copper sulphate electrolyte solution is circulated and current is passed.