The driving of the Criminals to their Final Abode in Hell and how it will be done
Allah informs about the disbelievers who deny the final abode, the recompense, Paradise, and the Hellfire. On the Day of Judgement it will be said to them:
(Depart you to that which you used to deny! Depart you to a shadow in three columns,) meaning, a flame of fire when it rises and ascends with smoke. So due to its severity and strength, it will have three columns.
لاَّ ظَلِيلٍ وَلاَ يُغْنِى مِنَ اللَّهَبِ
(Neither shady nor of any use against the fierce flame of the Fire.) meaning, shade of the smoke that comes from the flame -- which itself will not have a shade, nor will it benefit against the flame. This means it will not protect them from the heat of the flame. Allah said,
هَـٰذَا يَوْمُ لَا يَنطِقُونَ وَلَا يُؤْذَنُ لَهُمْ فَيَعْتَذِرُونَ (This is a day when they will not speak, nor will they be allowed to offer excuses....77:35, 36) In other words, this is the Day in which they will not be able to talk, nor will they be permitted to offer pleas for their misdeeds. However, other verses of the Qur'an inform us that they will speak and will be permitted to offer excuses. There is no discrepancy between the two verses, because there will be various stages on the Plain of Gathering (Mahshar) through which people will have to pass. Sometimes they will pass through a stage where it would be forbidden for them to speak or offer excuses; and at another stage they will be permitted. [ Ruh ].
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 40–49
When a man is confronted with the horrors of the Hereafter, he will find himself helpless. At that time, those who were wont to speak as if their vocabulary was inexhaustible, will be rendered speechless.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.