Embonini ye-metallurgical, asetshenziswa kakhulu ekuhlungeni uketshezi lwensimbi, ukuhlanzwa kwegesi ye-flue, ukuhlungwa kwegesi, nokuhlunga phansi.Indawo yokusebenza egqwala kakhulu yemboni ye-metallurgical idinga imikhiqizo yokuhlunga ukuthi ibe nokuphikisana nokushisa okuphezulu, ukumelana nokugqwala, nokumelana nokugqoka ukuze kuqinisekiswe ukusebenza okuzinzile kwemishini ye-metallurgical kanye nekhwalithi ephezulu yokukhiqizwa kwezinto ezibonakalayo.