A blast furnace is a block that smelts ores, raw metals, iron and gold armor and tools, similar to a furnace, but at twice the rate.

How do you use the blast furnace in Minecraft?

To use the blast furnace you'll need to place the item and fuel onto the blast furnace to change the state to 'lit'. The item on the blast furnace will be smelted twice as fast a regular furnace, but fuel used on the blast furnace will also be used at double the rate.

What are blast furnaces good for in Minecraft?

Blast furnaces were added in the Village & Pillage update in early 2019. They smelt ore blocks, tools and armour, just like regular furnaces. But they work twice as fast as regular furnaces do! They'll chew through a pile of iron or gold ore like there's no tomorrow, yielding a shiny stack of ingots.