What should be done with the worn-out pages of the Quran?
When the Holy Quran becomes unusable due to being worn out, then according to the clarification of the Hanafi jurists, the best method is to make a Lahad (a niche in a grave) and bury it in it (Radd al-Muhtar, Vol: 4, Pg: 271). Although there is also permission to put it in flowing water, this is against the preferred way (Khilaf-e-Awla). Similarly, burning is also established, as narrated by Allama Suyuti (may Allah have mercy on him). But this is prohibited according to the Hanafi scholars, as clarified by Allama Shami.
(Book: Habib al-Fatawa / Vol: 7 / Pg: 52)