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资金属精炼工艺被分为5个阶段：1．铜／镍在高压釜中的浸出；2．硒焙烧；3．多尔（金银）熔炼；4．银电解；5．金回收体系。该工艺近几年在奥托昆普公司的哈雅瓦尔塔（Harjavalta）金属冶炼厂得到发展，该厂每年处理大约600，000kg铜阳极泥。奥托昆普的波利（Pori）工厂阳极泥处理工艺流程从1941年以来不断取得进展并发展迅速。主要的变化是将常压浸出改成高压浸出，将硫酸焙烧改成二氧化硫／氧气焙烧，老式金银熔化炉改为转炉，金电解／王水工艺改为快速盐酸浸取工艺。波利厂目前生产30，000kg银、1，000kg金、30，000kg硒和数百公斤Pt－Pd精矿。
Capital refining process is divided into five stages: 1. Leaching of copper / nickel in autoclave; 2. Selenium roasting; 3. Dole (gold and silver) smelting; 4. Silver electrolysis; 5. Gold recovery system. This process has been developed in recent years at Outokumpu’s Harjavalta metal smelter, which processes approximately 600,000 kg of copper anode mud per year. The anode mud treatment process at Outokumpu’s Pori plant has been making steady progress since 1941. The main change is the atmospheric pressure leaching into high pressure leaching, the conversion of sulfuric acid roasting into sulfur dioxide / oxygen roasting, the old gold-silver melting furnace to converter, gold electrolysis / aqua regia to rapid hydrochloric acid leaching process. Poly Factory currently produces 30,000 kg of silver, 1,000 kg of gold, 30,000 kg of selenium and hundreds of kg of Pt-Pd concentrate.