noun
fire refining; pyrometallurgical refining
Technical term in metallurgy for refining metals using high-temperature processes, as opposed to wet (hydrometallurgical) methods.
乾式製錬は、銅や鉛の精錬に広く用いられている。
Fire refining is widely used for smelting copper and lead.
湿式製錬 (hydrometallurgy) uses aqueous solutions for metal extraction, while 乾式製錬 uses high-temperature smelting or roasting.
Compound of 乾式 (dry method) and 製錬 (smelting/refining). The term is a modern technical coinage.