In Roblox's Tower Incremental by Lucky CStudios, iron smelting unlocks when you purchase the room on Floor 10. Unlocking this floor activates iron ore spawns inside the Floor 3 mine, allowing you to feed raw ores into the smeltery's conveyor belt and forge iron ingots. These ingots serve as a critical mid-game crafting material required for advanced upgrade trees, high-tier trails, and permanent rebirth preservation perks.
How to Unlock the Floor 10 Smeltery
Before you can smelt iron, you must climb the tower by purchasing stair steps and unlocking prerequisite rooms:
- Unlock Floor 1 (Lava Glyphs): Requires 400 gold to start rolling initial income multipliers.
- Unlock Floor 3 (The Mine): Costs 1,500 gold and provides the pickaxe mining area where silver—and later iron—spawns.
- Unlock Floor 5 (Upgrade Tree): Uses silver to buy early stat nodes, but the board pauses further progression until you hit Floor 10.
- Reach Floor 10 (The Smeltery): Spend gold to build stairs up to Floor 10 and purchase the room door. Unlocking the smeltery immediately triggers iron ore spawns in the Floor 3 mine.
Gathering Raw Iron Ore in the Mines
Once Floor 10 is open, return to the mine on Floor 3 using the staircase or the built-in teleporter menu. Iron ore veins generate directly inside the mine walls alongside standard silver blocks.
To maximize your raw ore yield before processing, invest gold into the mine upgrade board located near the entrance:
- More Iron Per Ore: Increases the quantity of raw iron received per broken block.
- Ore Density: Increases the frequency of ore veins appearing within the mine walls.
- Lucky Strike: Grants a percentage chance for mined ores to drop double the standard yield.
- Mining Speed / Pickaxe Upgrades: Decreases the swing time required to clear blocks.
Players can mine manually or toggle the automated mining feature on the screen interface to gather ore passively while managing tower purchases.
Smeltery Mechanics and Station Upgrades
The smeltery takes raw iron ore, moves it across a mechanized conveyor belt, and pounds it into finished iron ingots. In early stages, ore must be walked to the smeltery bin, but upgrading the facility drastically speeds up automation.
| Smeltery Feature | Upgrade Type | In-Game Effect |
|---|---|---|
| Conveyor Belt Speed | Station Upgrade | Speeds up the processing cycle, reducing cycle times down to 3 seconds or 2 seconds. |
| Deposit Bin Capacity | Station Upgrade | Expands the container limit so the smeltery can hold larger ore batches simultaneously. |
| Silver Gain Multiplier | Station Upgrade | Provides an additional multiplier to silver earnings using processed metal. |
| Deposit From Anywhere | Utility Unlock | Available for roughly 30 million gold; automatically pipes all mined iron directly into the smeltery without manual trips. |
Purchasing the remote deposit upgrade is essential for uninterrupted progression, as it completely eliminates the need to run between Floor 3 and Floor 10.
Scaling Ingot Output with Glyphs and the Upgrade Tree
Raw iron ore alone does not dictate your crafting speed; ingots are multiplied through higher-floor mechanics. If you find your ingot production bottlenecked, focus on two specific systems:
1. Upgrade Tree Bulk Smelting
On Floor 5 and expanded sections (such as Floor 15 and Floor 25), the Upgrade Tree features dedicated ingot multiplier nodes:
- Bulk Smelt: Increases the volume of ores converted during each conveyor run.
- More Ingots (2x Ingots): Directly multiplies the number of finished ingots generated per smelting cycle, scaling outputs from baseline numbers (such as 16 per batch) up into hundreds (320, 448, 512, and beyond).
2. Poison Glyphs (Floor 11+)
Climbing past Floor 10 leads to the Poison Glyphs chamber. Standing in this rolling zone unlocks multipliers such as Venom and Plague. Unlike early Lava and Water glyphs that focus heavily on gold and silver, Poison Glyphs introduce direct multipliers for iron ore yields, multiplying every strike in the mine by massive margins.
Key Uses for Iron Ingots
Hoarding iron ingots allows you to purchase several essential account upgrades across the tower:
- Upgrade Tree Progression: Mid-tier nodes past Floor 10 switch currency requirements from silver to iron ingots.
- Movement Trails: Mid-game trails in the shop require flat iron sums, such as the Gilded Trail (75 iron), Aurora Trail (500 iron), and Crown Trail (5,000 iron). Buying out all shop trails unlocks the special Collection Trail, which grants universal resource multipliers.
- Permanent Upgrades (Floor 20): High-level rebirth prep rooms require gold and large batches of iron (such as 75,000 to 150,000+ ingots). Purchasing these guarantees that Upgrade Tree sections and specific glyph boards do not reset when performing a Rebirth.
- Star Forge (Late Game): Higher floors feature the Star Forge, where accumulated iron ingots are deposited to produce Star Metal.
Frequently Asked Questions
Why is iron ore not spawning in my mine?
Iron ore does not appear until you purchase the Floor 10 room. If you only have the Floor 3 mine unlocked, you will only see silver until Floor 10 is active.
How do I automate iron ore deposits?
You can purchase the "Deposit Iron From Anywhere" upgrade at the smeltery for approximately 30 million gold. Once purchased, any iron gathered via manual or auto-mining immediately enters the smelter conveyor.
Why are my ingots producing so slowly even with lots of ore?
Having thousands of raw ore in storage does not speed up the smelter on its own. You must purchase "Belt Speed" inside the smeltery to reduce the conveyor timer and upgrade "Bulk Smelt" or "More Ingots" in the Upgrade Tree to multiply the finished output per batch.
