Diversified miner Glencore on Friday reported an 11% year-on-year increase in its copper production and a 54% year-on-year increase in its cobalt output, mainly as a result of the restart of Democratic Republic of Congo- (DRC-) based subsidiary Katanga Mining’s processing operations in late 2017. Glencore’s own sourced copper output increased to 1.4-million tonnes, but copper sales were 22 000 t lower than production, as a result of the timing of shipments.