metallisulfiidide autogeensulatus sulatusahju õhu- või hapnikujoa sissepuhumise teel (vt autogeensulatus), a smelting process for sulphur-containing ores designed to reduce atmospheric pollution; the ore is mixed with oxygen and ignited at the exit from a nozzle where it melts and releases sulphur mainly in the solid form as it drips down to a pan catcher (see: autogenous smelting)