SÃO PAULO — Brazil’s exports of nonferrous products were mixed in 2012.

Alumina, the largest export category, saw volumes rise 2 percent last year, although export revenue dropped 12.5 percent from 2011 levels, according to Brazilian Trade Ministry data.

Bauxite also saw mixed results, with volumes inching 0.3 percent lower while revenue rose 1.9 percent.

On a percentage basis, copper scrap exports notched the biggest gains, with volumes rising 72 percent and revenue increasing 83.3 percent. Meanwhile, copper cathode exports scored the biggest declines, falling 71.6 percent and 75.1 percent, respectively, in the same comparison.