Melted silver ready to be poured into moulds is seen at the KGHM Copper and Precious Metals smelter and processing plant in Glogow, Poland, on May 10, 2013.PETER ANDREWS/Reuters
A worker looks on at the KGHM smelter and processing plant.PETER ANDREWS/Reuters
Melted silver is poured into moulds at the KGHM smelter.PETER ANDREWS/Reuters
Construction of the plant began in 1968. A second smelter at the site was brought on line in 1978.PETER ANDREWS/Reuters
A worker supervises the pouring of molten silver into moulds.PETER ANDREWS/Reuters
Workers prepare to pour molten silver.PETER ANDREWS/Reuters
A worker looks on while pouring melted copper into a furnace at the KGHM smelter in Glogow. The plant utilizes one-stage flash furnace copper smelting technology.PETER ANDREWS/Reuters
A worker pours melted copper at the KGHM Copper and Precious Metals smelter.PETER ANDREWS/Reuters
The molten copper is poured.PETER ANDREWS/Reuters
A worker removes a freshly made bar of silver from a mould at the KGHM smelter.PETER ANDREWS/Reuters
Unrefined pieces of silver are stacked at the KGHM copper and precious metals smelter processing plant in Glogow.PETER ANDREWS/Reuters
A freshly produced silver bar is moved by a worker.PETER ANDREWS/Reuters
A worker takes a break at the KGHM smelter.PETER ANDREWS/Reuters
A worker pours melted silver into moulds.PETER ANDREWS/Reuters
A worker weighs a finished silver bar. The smelter produces bars weighing 900 to 1,050 troy ounces and 99.99 per cent pure.PETER ANDREWS/Reuters
Bars of silver are placed on wooden pallets at the KGHM processing plant, which also produces silver granules.PETER ANDREWS/Reuters
A worker carries a finished silver bar.PETER ANDREWS/Reuters