ICNEA 3218—Silicon smelting

Where 3218 sits

1. C Manufacturing industry
2. 32 Non-ferrous metal smelting and rolling processing industry
3. 321 Commonly used non-ferrous metal smelting
4. 3218 Silicon smelting

What 3218 includes

• Including the following silicon smelting activities：
• Metallurgical grade silicon (industrial silicon)

What 3218 excludes

• Polysilicon rods (solar grade polysilicon, electronic grade polysilicon), included in 3099 (manufacturing of other non-metallic mineral products)
• Monocrystalline silicon wafers, polysilicon wafers and related silicon products for electronic semiconductor use are included in 3985 (Manufacturing of special materials for electronics)

3218 in other systems