Brazilian mining titan Companhia Vale do Rio Doce (RIO) said late Monday that it had finalized an alumina refinery joint venture with Dubai Aluminium Co., or Dubal.

Dubal purchased a 19% stake in Companhia de Alumina do Para, or CAP, for an undisclosed sum. The deal was first announced April 14.

Vale will hold a 61% stake in CAP, while Norway's Norsk Hydro ASA (NHYDY) will have the remaining 20% stake.

Dubal is one of the world's largest aluminum smelters, Vale said.

CAP will start up an aluminum refinery at Barbacena, Para State, in late 2012, just five kilometers from Vale's Alunorte refining subsidiary. The refinery will have initial output of 1.86 million metric tons of alumina a year.

-By Jeff Fick, Dow Jones Newswires; 55-21-2586-6085; jeff.fick@dowjones.com