영어 원문

The blast furnace burns the impurities out of the mix, melting down the metal in the ore.

한국어 번역문

용광로는 광석의 금속을 녹이면서, 혼합물로부터 불순물을 태워버린다.

해석
The blast furnace burns the impurities out of the mix, as [when] it melts down the metal in the ore.
⇒The blast furnace burns the impurities out of the mix, melting down the metal in the ore.
※ 보통분사구문【As․When (떄)】
접속사․주어를 생략하고 동사에 -ing를 달아 부사구로 만드는 것.

복문	종속절				주절
	종속접속사	S'		V'	S	V
	When While After
분사구문	부사구				주절
	(S')	(When) (While) (After)	BV-ing (being) BV-ing (being) p.p.		S	V

(※ 단, 주절과 종속절의 주어가 다를 경우에는 분사구의 주어를 생략할 수 없고,
접속사의 뜻을 명사․강조할 때에는 생략하지 않아도 된다.)
ex-1) When she was left herself, she began to weep.
⇒Left herself, she began to weep.
ex-2) While I was walking along the street, I met a friend of mine.
⇒Walking along the street, I met a friend of mine.
ex-3) After all this had been settled, he went home.
⇒After all this having been settled, he went home.