Unites States company Cleveland-Cliffs is looking to spend nearly $600 million on acquisitions in Western Australia as it moves to fully own iron ore miner Portman Ltd and acquire a 30 per cent slice in explorer AusQuest Ltd.

Unites States company Cleveland-Cliffs is looking to spend nearly $600 million on acquisitions in Western Australia as it moves to fully own iron ore miner Portman Ltd and acquire a 30 per cent slice in explorer AusQuest Ltd.