Brazilian miner Vale will announce a 70 billion real investment this Friday for the expansion plan at its iron ore and copper mining at the Carajas complex in northern Brazil, with the plan running through 2030. 

The announcement will be made at an event attended by President Luiz Inacio Lula da Silva and his cabinet. 

Carajas, Vale's largest iron ore production site, contributed 177.5 million metric tons last year, over half of the company's total output.

Vale has faced past criticism from the government over insufficient investment and delays in addressing the 2015 dam collapse, but recently highlighted alignment with Brazil's development agenda. 

The company will present its "New Carajas" project at the event, while also producing copper and nickel in Para.