noun
flash smelting; autogenous smelting
Technical term in metallurgy for a smelting process that uses the heat from oxidation of the ore itself, without external fuel.
自溶製錬は銅の精錬に広く使われている。
Flash smelting is widely used in copper refining.
Compound of 自溶 (self-melting) and 製錬 (smelting/refining). The exact historical derivation is uncertain; the term is a modern technical coinage.