A datapack for Minecraft Java Edition which aims to give more gold and iron from smelting. Version 1.21.11 (Older Versions available)
This uses a hopper right next to any furnace or blast furnace. The hopper needs to have a recipe in it:
Then you need to throw a fire charge into the hopper cavity, not on the rim. Standard button for throwing is "q". Then you'll hear a "whoosh" sound which lets you know it worked. If you destroy the hopper you get these items back, not the fire charge though.
Then you build either: bricks, nether bricks, red nether bricks, stone bricks, end stone bricks, mossy stone bricks, cracked stone bricks, chiseled stone bricks, cracked nether bricks, chiseled nether bricks, polished blackstone bricks, cracked polished blackstone bricks, mud bricks, resin bricks, tuff bricks, quartz bricks, deepslate bricks, cracked deepslate bricks and prismarine bricks around it in any combination.
The iron bars are decoration, they're not needed. You can have any block above the furnace, including a hopper, and also any block above the hopper inside the multi-block structure. The multi-block structure can for example be stacked on top of each other:
If the furnace is running it displays the item (nether gold ore) that is being smelted in the hopper together with flames and smoke to show that something is being smelted:
When the item changes, the display of the item does too and when the furnace runs out of fuel or there is no item to smelt the display clears to no item being displayed. If there is any block above this hopper the item and the particles won't be displayed.
Iron armour pieces, iron tools, iron sword and iron horse armour, chainmail armour pieces, gold armour pieces, gold tools, gold sword and golden horse armour copper armour pieces, copper tools, copper sword and copper horse armour and the spears and nautilus armours
variations of iron ore, gold ore and copper ore.
The blast blast furnace outputs nuggets and or ingots into the hopper. Depending on the recipe you get a random amount which loosely respects the amount of ingots that went into crafting the item. From the ores you can either get anything from 3 to 9 nuggets or an ingot, depending on the settings.
Open your minecraft directory, where the savefile for your world is located. Your worldsave contains a folder "datapacks", where the zipfile needs to be copied into. Minecraft will enable new availabe datapacks on a restart of the world. If the world is currently running, you will need to type the command: /reload into chat.
Mine/destroy the Hopper to get the recipe-items back. This will get rid of the marker entity that made it work. Then you can remove this datapack from your world. Execute a function from chat: /function bbf:uninstall_bbf, which will remove the scoreboards that were added. This will ensure that the "scoreboard.dat" of your worldsave won't have unneeded and unused scoreboards left. Then you can close the world and delete the zip file from your datapacks folder. It might become necessary to close Minecraft completely since a message could pop up saying: "the file is still in use".
This Update makes use of all the new smeltable items. it also changed the namespace in the folders. so you have to uninstall any previous versions before installing this one.