Campfires, Smokers and Blast Furnaces can now smelt every vanilla item, but at a different speed

 

Campfire: 30 seconds

Normal Furnace: 10 seconds

Smoker: 2.5 seconds

Blast Furnace: 0.5 seconds

 

Smoker crafting has been made slightly harder and to craft the blast furnace you will be required many more materials