。
Sulfur burns with a blue flame.
Literal
Sulfur [topic-は] blue flame [object-を] raising burns.
硫黄 (いおう, sulfur) is uncommon kanji. 青い炎を上げて燃える (burns raising a blue flame) describes the combustion process — 炎を上げる (to produce flames) is a vivid expression. A science-fact sentence.