Long columns of fire are closed and locked at them, no escape at all. This reflects despair of salvation. Thus, the recompense is of the same kind of the wrong deed and every kind of sin has a suitable kind of punishment. Allah (swt) says:

 ﴾وَمَا ظَلَمْنَاهُمْ وَلَٰكِن كَانُوا أَنفُسَهُمْ يَظْلِمُونَ ﴿

 (And We did not wrong them [thereby], but they were wronging themselves.) (An-Nahl: 118)