The price increase follows the announced minimum freight rate for trucks as a concession to striking truckers, according to a report from newspaper Valor Econômico.
From all mineral exports to the US, only calcined alumina rose during January-May, official data shows.
Mexico's DeAcero may be forced to close a nail production plant in the US as a result of the country's decision to impose 25% tariffs on Mexican steel.
The Rio de Janeiro-based miner said the deals will allow the company to go ahead with US$1.7bn in investments in a mine expansion project in Canada.
Southern's newest project in Peru just took an important step toward becoming reality as the Phoenix-based company signed the definitive contract for the property.