Artemis now expects to feed first ore to the ball mill in the next few weeks and continues to target first gold pour before year end.
The French miner was this year given a sales quota by the Asian nation that was 29% less than it expected.
The Cobre Panama mine paid the price for the accumulated national discontent, said President José Raúl Mulino.
Peter Carlsson, co-founder and leader of Northvolt since 2016, will remain as advisor as he quit a day after the firm filed for bankruptcy.