Aluminothermic reaction

Aluminothermic reactions are exothermic chemical reactions using aluminium as the reducing agent at high temperature. The most prominent example is the thermite reaction.

eg: Fe₂O₃ + 2Al = 2Fe + Al₂O₃ + Heat

A common use of this reaction is the welding of rail tracks on-site, useful for complex installations or local repairs that cannot be done using continuously welded rail.Another common use is the welding of copper cables (wire) for use in direct burial (grounding/earthing) applications. It is still the only type of electrical connection recognized by the IEEE (IEEE, Std 80-2001) as continuous un-spliced cable.

The aluminothermic reaction is also used for the production of ferroniobium from niobium pentoxide. [cite web | title = THE PRODUCTION OF FERRONIOBIUM AT THE NIOBEC MINE 1981-2001 | author = Claude Dufresne and Ghislain Goyette | url = http://www.cbmm.com.br/portug/sources/techlib/science_techno/table_content/sub_1/images/pdfs/start.pdf | accessdate = 2008-09-02] Other metals can be produced in the same way.

ee also

* Thermic reaction

References

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