Report summaryThe La Oroya copper smelter was commissioned in 1922 to treat ores and concentrates from surrounding mines. The copper smelter forms part of a metallurgical complex that also includes lead and zinc smelters, copper and lead refineries, a precious metals refinery, and antimony, bismuth, indium and arsenic trioxide plants. At commissioning the smelter operated two silica sprung arch reverberatory furnaces. In 1957 the width of the furnaces was increased and in 1965 a suspended basic roof was...
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