The bauxite used in Alunorte comes from Mineração Paragominas through a pipeline and from Mineração Rio do Norte (MRN) through the port of “Vila do Conde”. Part of the alumina produced is exported and the other part is supplied for the Albras plant also located in Barcarena and which produces aluminum ingots.
The production process of alumina generates a residue, which is washed, filtered and stored in the refinery solid residue deposits. Alunorte has two solid residue deposits: DRSI and DRS 2.
The first began its operations in 1995, when the refinery Was inaugurated. The second had its testing and commissioning phase started in August 2016. The DRSI and DRS2 are not classified as dams according to the Brazilian legislations.