Spot prices ended the day's trading 1.09% higher at US$5,865/t (US$2.660/lb) on the London Metal Exchange.
Duties were imposed on August 17, 2016 for a 180-day period.
Miners are looking to revive postponed projects in Peru as metals prices rebound from four years of declines.
The average price of copper was up to an average of US$2.602/lb in January compared to US$2.024/lb in the same month of last year.
Revenue from iron ore exports soared in the period, official data shows.