In a benchmark deal, China’s leading copper smelters have raised treatment and refining charges (TC/RCs) for 2022 by $5.5/mt and 0.55 cents/lb, respectively, from 2021 levels, industry sources said. Chinalco China Copper Co. Ltd., Jiangxi Copper Corp. Ltd., Jinchuan Group and Tongling Nonferrous Group set the annual benchmark TC/RCs under term supply contracts at $65/mt ...