Question

Zn extraction from Zn blade. - this reactionion is happened at 1300⁰- 1400⁰ c but the boiling point of Zn is 920⁰ c .... then how this possible ... explain ...

Answer 1

This mixture is introduced into the furnace and is heated inside at a temperature of about 1400 ^o c. Zinc is obtained in the form of vapors which later condenses in the condenser which gives out molten zinc or even called as spelter zinc.

this is explained in BYJUS i am providing link go through for further clarification
https://blog.byjus.com/extraction-of-zinc/