- Lead smelting and refining (secondary) (1)
- Secondary precious metals (2)
- Gold smelting and refining (secondary) (2)
- Silver recovery from used photographic film (3)
- Silver smelting and refining (secondary) (1)
- Aluminum smelting and refining (secondary) (11)
- Brass smelting and refining (secondary) (4)
- Copper smelting and refining (secondary) (2)
- Detinning of cans and scrap (1)
- Recovery and refining of nonferrous metals (2)
