Boliden's gold production totals around 15,000 kilos per annum, two thirds of which comes from the smelters' electronic recycling operations, and the balance from our own mines.
At Rönnskär, gold (24 carat) is extracted as ingots weighing 12.5 kg, or as granules. The ingots are cast in standard bars approved by the London Bullion Market Association (LBMA). Granules are extracted by pouring liquid gold through a filter into cold water. The advantage of granules is that they are easier to weigh and handle. More than half of the gold extracted at Rönnskär comes from recycled electronic scrap.
At Pori, gold, min. 99,99 per cent, is produced in bars weighing 12,5 kg (400 T.O.). Each bar is numbered and the actual purity is die-stamped on it.