Question

How blast Furance work?

Answer 1

In the crafting menu, you should see a crafting area that is made up of a 3x3 crafting grid. To make a furnace, place 8 cobblestones in the 3x3 crafting grid. When making a furnace, it is important that the cobblestones are placed in the exact pattern as the image below.

Answer 2

Blast furnace works on the principal of explosion.