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| Bauxite is a naturally occurring, heterogeneous material composed primarily of one or more aluminum hydroxide minerals, plus various mixtures of silica, iron oxide, titania, aluminosilicate, and other impurities in minor or trace amounts. The principal aluminum hydroxide minerals found in varying proportions with bauxites are gibbsite and the polymorphs boehmite and diaspore. Bauxites are typically classified according to their intended commercial application: abrasive, cement, chemical, metallurgical, refractory, etc. The bulk of world bauxite production (approximately 85%) is used as feed for the manufacture of alumina via a wet chemical caustic leach method commonly known as the Bayer process. Subsequently, the majority of the resulting alumina produced from this refining process is in turn employed as the feedstock for the production of aluminum metal by the electrolytic reduction of alumina in a molten bath of natural or synthetic cryolite (Na3AlF6), the Hall-Héroult process. |
Publications
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Annual Publications
- Bauxite and Alumina
PDF Format:
| 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | - Appendixes
- Bauxite and Alumina
PDF Format:
| 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 |
XLS Format:
| 2002 | 2003 | 2004 | 2005 | 2006 | - Archive
| 1932-1993 |
Quarterly Publications
- Bauxite and Alumina
PDF Format:
2008: | First Quarter |
2007: | First Quarter | Second Quarter | Third Quarter | Fourth Quarter |
XLS Format:
2008: | First Quarter |
2007: | First Quarter | Second Quarter | Third Quarter | Fourth Quarter |
Special Publications
- Statistical Compendium
- Historical Statistics for Mineral and Material Commodities in the United States
Data Series 140
Contacts
- USGS Mineral Commodity Specialist
E. Lee Bray
Phone: 703-648-4979
Fax: 703-648-7757
Email: lbray@usgs.gov
- USGS Mineral Resource Specialist
