Natsir Mansyur, the president of Indosmelt, the company already held the investment principle license to build the smelter which will produce copper cathode, sulfuric acid, copper slag and anode mud
. Its copper cathode production is expected to reach 100,000 tons per year, copper slag at 200,000 tons per year to be used by cement factories.
Gold remains in the filter cloth lined cradle as anode mud
. The raked silver crystals are filtered, washed, and cast as bullion.