Establishments primarily engaged in smelting and refining nonferrous metals, except copper and aluminum. Establishments primarily engaged in rolling, drawing, and extruding these nonferrous primary metals are classified in Industry 3356, and the production of bullion at the site of the mine is classified in Division B, Mining.
- Antifriction bearing metals, lead-base: primary
- Antimony refining, primary
- Babbitt metal, primary
- Beryllium metal
- Bismuth refining, primary
- Blocks, zinc, primary
- Cadmium refining, primary
- Chromium refining, primary
- Cobalt refining, primary
- Columbium refining, primary
- Germanium refining, primary
- Gold refining, primary
- Ingots, primary: nonferrous metals, except copper and aluminum
- Iridium refining, primary
- Lead pigs, blocks, ingots, and refinery shapes: primary
- Lead smelting and refining, primary
- Magnesium refining, primary
- Nickel refining, primary
- Nonferrous refining, primary: except copper and aluminum
- Nonferrous smelting, primary: except copper and aluminum
- Pigs, primary: nonferrous metals, except copper and aluminum
- Platinum-group metals refining, primary
- Precious metal refining, primary
- Primary refining of nonferrous metal: except copper and aluminum
- Primary smelting of nonferrous metal: except copper and aluminum
- Refining of nonferrous metal, primary: except copper and aluminum
- Rhenium refining, primary
- Selenium refining, primary
- Silicon refining, primary (over 99 percent pure)
- Silicon, epitaxial (silicon alloy)
- Silicon, pure
- Silver refining, primary
- Slabs, primary: nonferrous metals, except copper and aluminum
- Smelting of nonferrous metal, primary: except copper and aluminum
- Spelter (zinc), primary
- Tantalum refining
- Tellurium refining, primary
- Tin base alloys, primary
- Tin refining, primary
- Titanium metal sponge and granules
- Zinc dust, primary
- Zirconium metal sponge and granules