Pizarro said 18 labor negotiations at Codelco's mines affected its bottom line but that productivity increases kept costs in line with industry averages.
Ferro-Alloy Resources Group, which is producing vanadium in Kazakhstan, has listed on the London stock market, marking the first junior flotation in the sector this year.
Vale SA estimates selling up to 75 million tonnes less iron ore this year, after several mines were halted following its second deadly dam burst in less than four years.
Chemicals group Johnson Matthey has secured a site in Poland to produce battery materials and signed a 10-year supply deal with Canada's Nemaska Lithium.
Companies have requested a judicial review of South Africa's 2018 mining charter to change clauses related to transactions made in the past to increase black ownership.
