Alloy Smelter
by TheFogIOF
Players who want ore processing without a furnace line can build an Alloy Smelter, a multi-block structure that smelts ores in three tiers.
What it does
The Alloy Smelter is a multi-block structure built from Forge blocks in three tiers, tier 1 through tier 3, each with its own block. Input slots accept items placed in a set order, because a recipe with two or more items depends on the order they go into the slots. The output slot sits inside the top input slot, so finished items can be taken out directly.
Hoppers load the input slots the way a chest does, and a hopper can reach the fuel slot. Other automation mods can feed the smelter from the side except the top and bottom. The forge level is set by a block tag, so a datapack can add fuel items or change which blocks count as forge blocks.
Installation requires the Forge blocks to be present in the world before the structure is built, and the mod is for client and server, so the server and every player need it. Files are published for Forge and NeoForge across nine game versions, 1.20.1 – 1.21.4, under a custom license that is not open source.
Key features
Three forge tiers
Tier 1, tier 2 and tier 3 forge blocks each have their own block, so the smelter can be upgraded in stages.
Ore smelting in multi-block form
The structure smelts ores placed in its input slots, where vanilla furnaces handle only two smelting recipes per ore.
Hopper and automation access
Hoppers fill the input slots like a chest, and other automation mods can feed the sides of the structure.
Datapack control of fuels
A block tag sets the forge level and the list of accepted fuels, which a datapack can change.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x3 of 3 versions with builds
1.20.x6 of 6 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Players who run automated factories and server owners who build ore processing into a modpack, along with pack authors who want to add custom fuels through a datapack.
How it compares
KubeJS EnderIO is a Forge and NeoForge mod for 1.20.1 – 1.21.1 that runs server-side only and is not open source, so clients need nothing extra. Alloy Forgery is an open source mod under the MIT License for Fabric, NeoForge and Quilt, covering 1.17 – 26.1.2, and it runs on client and server. Ender IO: Evolution is a Forge and NeoForge mod for 1.20.1 – 26.1.2 that runs on client and server and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Alloy Smelter | Forge and NeoForge | 1.20.1 – 1.21.4 | Client and server | 2026-09-26 |
| KubeJS EnderIO | Forge and NeoForge | 1.20.1 – 1.21.1 | Server-side only | 2026-03-11 |
| Alloy Forgery | Fabric, NeoForge and Quilt | 1.17 – 26.1.2 | Client and server | 2026-09-10 |
| Ender IO: Evolution | Forge and NeoForge | 1.20.1 – 26.1.2 | Client and server | 2026-10-08 |
Questions
Does Alloy Smelter need to be installed on the server?
Which loaders does Alloy Smelter support?
How can a pack add custom fuels to the smelter?
In the catalog
Alloy Smelter is one of 3,514 Library mods on ModsFinder, and one of 1,576 Library mods for Forge. 17,979 mods support Minecraft 1.21.4.
More from TheFogIOF
Similar mods
What the author says
If you have an old version of the mod and you updated to the new version, where there are 5 slots in the forge, if you placed forge block in your world, the world will not start. Break all the forge blocks in your world, then update the mod. There are only two smelting recipes for each vanilla ore for each forge…
Official listing
- Modrinth page
- modrinth.com/mod/alloy-smelter
- Owner
- TheFogIOF
- Published
- 2025-03-04
- Updated on Modrinth
- 2026-09-26
- Facts verified
- 2026-10-15