The world's largest iron ore miner has elected two new board members.

New or expansion projects with a dam height of over 200 metres are prohibited, while tailings dams that have been in service for less than five years may not be expanded or rebuilt.

ANM said it had visited the dam, and noted only minor superficial irregularities.

BHP's previous commodities trading stretches back to when it merged with British peer Billiton in 2001.

India's largest state-owned iron ore miner has received a 20-year extension for four mines.

Brazil's TV program "Jornal da Band" obtained a report regarding the B-5 dam from prosecutors in the state of Minas Gerais through a freedom of information request.