Boliden starts silver recovery at the Kokkola smelter
Boliden is starting up a silver recovery process at its Kokkola zinc smelter in Finland. The annual volume of silver recovered will be approximately 25 tonnes, depending on the silver content of the raw material. “The silver content of zinc concentrates has gradually increased over the years. This new process and the investment are, therefore, of great importance for the Kokkola zinc smelter, and will improve both the profitability and the raw material efficiency,” says Jarmo Herronen, General Manager of Boliden Kokkola. The new process will be integrated into the existing zinc