云南铜业：公司生产与销售的主产品为阴极铜，副产黄金、白银、工业硫酸等产品，不直接生产铜箔

Group 1 - The company primarily produces and sells cathode copper, with by-products including gold, silver, and industrial sulfuric acid [2] - The company also recovers various rare metals such as molybdenum, selenium, tellurium, platinum, palladium, and rhenium, but does not directly produce copper foil [2]