'Fire' in the Bible

Who is there among you that would even shut the doors? and ye would not kindle fire on mine altar for nothing. I have no delight in you, saith Jehovah of hosts, neither will I accept an oblation at your hand.

But who shall endure the day of his coming? and who shall stand when he appeareth? For he will be like a refiner's fire, and like fullers' lye.