331311 Alumina Refining
This U.S. industry comprises establishments primarily engaged in refining alumina (i.e., aluminum oxide) generally from bauxite.
Cross-References. Establishments primarily engaged in--
- Manufacturing aluminum oxide abrasives and refractories--are classified in Subsector
327, Nonmetallic Mineral Product Manufacturing; and
- Making aluminum from alumina--are classified in U.S. Industry 331312, Primary Aluminum Production.