South Korean copper smelter LS MnM announced on Monday that it is reviewing plans to adjust raw material procurement and production levels in response to a sharp drop in smelting profits. Despite copper prices being near historical highs, a supply-demand imbalance has driven processing fees to record lows. LS MnM is South Korea's only dedicated copper smelter, with an annual production capacity of 680 (unit unspecified, typically kilotons) at its Onsan smelter in Ulsan.