However, analysts warn that imports of the ferrous commodity are on track to reach a new record this year.
Copper, gold, zinc, lead, tin, iron ore and molybdenum exports all rose in January-June, as miners overcame strikes and washed-out roads to get their shipments to market.
Albemarle reports second quarter results.
Brazilian iron ore miner Vale provides an updates on its corporate restructuring proposal.
Bolivia has invested US$66.6mn to date in its Salar de Uyuni lithium project, which has yet to organize a new bidding round after a process fell through in May.