Precious metals prices drop again under pressure from a rising US dollar and lower oil prices, despite signs of healthy investment demand.
The plant in Brazil's Espírito Santo state will reportedly close the year operating at 7.2Mt/y.
CSP shipped its first batch of slabs in July 2016.
The volume of iron ore to be acquired from its mining arm will decline by 1.7Mt/y in the 2018-21 period.
The latest news from junior mining companies operating across Latin America.
The ICSID postpones a decision on an arbitration claim by Infinito Gold against Costa Rica related to the cancellation of the Las Crucitas concession.
Colombia saw lower output of most major metals in the third quarter, while miners ramped up production of nickel, iron ore and emeralds.