Q&A for How to Use a Furnace in Minecraft

Right-click the block you want to separate and it will split. You can also select the block and go to an empty square in your inventory. Then, right-click to put one block into your inventory for a specific amount.

To open a furnace, be facing it, then right-click your mouse or press the button you use to place blocks or use other items.

To start a smoker you need to place fuel like coal or wood in the space at the bottom, then put a food item that can be cooked in the top space. You cannot smelt any other items besides foods that can be cooked.

Furnaces are used to smelt items including: raw ores, raw meats, potatoes, kelp, unused gold and iron armor and tools, sand, cobblestone, clay, stone, chorus fruits, cactus, wood logs, and other blocks. Smelting raw foods makes them restore more hunger, and smelting raw ores allows you to use them to craft other items.