Hell is not exactly burning with fire. Yes, there is fire there, but fire is indeed rising of 1.wrong believes(e.g., Polytheism, Atheism, etc. ) and 2.bad doings(e.g., Oppression, Lie, etc.) from the heart(i.e., soul or sprite) of the bad man in which those wrong believes and doings have established during living in this world.
Holy Quran, [72:15],
But as for the unjust(bad doing), they will be, for Hell, firewood.
[3:10]
Indeed, those who disbelieve(wrong belief) - never will their wealth or their children avail them against Allah at all. And it is they who are fuel for the Fire.
[21:98]
Indeed, you [disbelievers] and what you worship other than Allah are the firewood of Hell. You will be coming to [enter] it.
Also, all disbelievers will not go to Hell. Who cannot bring forth any strength and have not been shown the right way will not go to Hell.
[4:97-99]
97.Behold, those whom the angels gather in death while they are still sinning against themselves, [the angels] will ask, "What was wrong with you?'' They will answer: "We were too weak on earth." [The angels] will say: "Was, then, God's earth not wide enough for you to forsake the domain of evil?" For such, then, the goal is hell - and how evil a journey's end!
98.But excepted shall be the truly helpless - be they men or women or children - who cannot bring forth any strength and have not been shown the right way:
99.as for them, God may well efface their sin - for God is indeed an absolver of sins, much-forgiving.