In Minecraft, how to use the Minecraft Miniature Blackened Furnace can be referenced as follows:
The Black Furnace can be customized in size from 3×3 to 11×11, with a height of at least 3. To build it, you need to cover the top, bottom and surrounding frames. The top can be built with the lower half of the bricks or the stairs with the gap facing upward. This multi-block structure can be built from any type of non-transparent blackened blocks, but can only have one controller. At least one tank capable of storing fuel is required, and this tank must be placed in the frame around the structure (as shown in the figure). The top can also be composed of steps or stairs derived from burnt black blocks.