Ultimate Blast Furnace Guide for OSRS: Maximize XP and Profit in 2025
The Blast Furnace in Old School RuneScape (OSRS) is one of the most efficient and rewarding minigames for leveling Smithing and making gold. Located in Keldagrim, this members-only activity lets you smelt bars using half the coal compared to traditional furnaces, offering incredible XP rates and profit potential. Whether you’re chasing the Smithing skill cape or looking to stack some serious OSRS gold, this guide will walk you through everything you need to know about the Blast Furnace in 2025. From requirements to strategies, we’ve got you covered!
Before you can dive into the Blast Furnace, there are a few prerequisites and preparations to handle. This section covers how to unlock access, what you’ll need, and how to get there efficiently.
Requirements to Use the Blast Furnace
To start using the Blast Furnace, you don’t need a high Smithing level, but certain conditions must be met:
- Membership: The Blast Furnace is exclusive to members.
- The Giant Dwarf Quest: You must start this quest to gain access to Keldagrim. You don’t need to complete it—just speak to the Dwarven Boatman east of Rellekka to enter the city.
- Smithing Level 60 (Optional): If your Smithing is below 60, you’ll pay 2,500 GP every 10 minutes to use the furnace. At 60+, it’s free.
- 72,000 GP/Hour (Blast Furnace Worlds): On designated worlds, this fee pays dwarves to operate the furnace for you.
How to Reach the Blast Furnace
The Blast Furnace is located in east Keldagrim. Here’s how to get there:
- First Visit: Start “The Giant Dwarf” quest by talking to the Dwarven Boatman east of Rellekka (near Fairy Ring DKS). He’ll ferry you to Keldagrim.
- Subsequent Trips: Use the Minigame Group Finder teleport, mine carts from the Grand Exchange or Dwarven Mines, or walk from Seers’ Village.
- Location: Once in Keldagrim, head east, cross the bridge, and enter the building with the furnace icon. Go downstairs to find the Blast Furnace.
Essential Gear and Inventory Setup
To maximize efficiency at the Blast Furnace, the right gear and inventory setup are crucial. This section breaks down what to bring and why.
Recommended Equipment
Since you’ll be running a lot with heavy ore and bars, weight reduction is key:
- Graceful Outfit: Reduces weight and preserves run energy.
- Boots of Lightness: Alternative if you don’t have full Graceful.
- Ice Gloves: Allows instant bar collection from the dispenser, saving time over using a bucket of water. Obtainable from the Ice Queen under White Wolf Mountain.
- Ring of Charos (a): Cuts the sub-60 Smithing fee to 1,250 GP (requires specific dialogue with the Foreman: 1-3-2-3).
Inventory Essentials
Your inventory depends on your goals (XP or profit), but here’s a core setup:
- Coal Bag: Holds 27 coal, doubling your coal-carrying capacity. Buy it for 100 golden nuggets from Prospector Percy at Motherlode Mine.
- Stamina Potions: Keeps your run energy up for continuous operation.
- Goldsmith Gauntlets: Boosts XP when smelting gold bars (from the Family Crest quest).
- Ores and Coal: Varies by bar type—see the strategies below.
How to Use the Blast Furnace: Step-by-Step Process
The Blast Furnace is straightforward once you get the hang of it. Here’s how to operate it solo on a Blast Furnace world.
Basic Mechanics
On worlds like 352, 355, 358, 386, or 387, dwarves (Dumpy, Stumpy, Pumpy, Numpty, and Thumpy) handle the furnace mechanics for a 72,000 GP/hour fee, deposited in the coffer near the bank chest. Your job is simple: load ores and collect bars.
Step-by-Step Guide
- Pay the Fee: Deposit 72,000 GP in the coffer (and 2,500 GP/10 min to the Foreman if under 60 Smithing).
- Withdraw Materials: Grab your ores and coal from the bank chest. Use the coal bag for efficiency.
- Load the Conveyor: Run to the conveyor belt and deposit your ores and coal.
- Collect Bars: Head to the bar dispenser. With ice gloves equipped, click to collect instantly. Without them, use a bucket of water to cool the bars first.
- Bank and Repeat: Return to the bank chest, store your bars, and grab more materials.
Best Blast Furnace Strategies for XP and Profit
The Blast Furnace shines for both XP and profit, depending on your bar choice. Here’s how to optimize for each goal.
Maximizing Smithing XP: Gold Bars
For the fastest Smithing XP in OSRS, smelt gold bars with Goldsmith Gauntlets:
- Requirements: 40 Smithing, Goldsmith Gauntlets, Ice Gloves.
- Setup: 27 gold ore per trip (no coal needed), ice gloves equipped, coal bag optional.
- XP Rates: Up to 350,000–420,000 XP/hour with perfect timing.
- Cost: Gold ore is pricey (around 300–400 GP each), making this a loss-making method, but the XP is unmatched.
Profit-Focused: Mithril, Adamant, and Rune Bars
For gold, smelt higher-tier bars that use coal efficiently:
| Bar Type | Level Req | Ore Needed | Coal Needed | XP/Hour | Profit/Hour (Approx) |
|---|---|---|---|---|---|
| Mithril | 50 | 1 Mithril | 2 | 120,000–150,000 | 300,000–500,000 GP |
| Adamant | 70 | 1 Adamant | 3 | 100,000–130,000 | 600,000–800,000 GP |
| Rune | 85 | 1 Runite | 4 | 80,000–100,000 | 1,000,000+ GP |
Hybrid Method: Combine gold ore with mithril/adamant/runite using a coal bag for balanced XP (200,000/hour) and profit.
Steel Bars for Low Levels
For players under 60 Smithing, steel bars are a solid early option:
- Requirements: 30 Smithing, coal bag recommended.
- Setup: 27 iron ore + 27 coal per trip (1:1 ratio at Blast Furnace).
- XP: 80,000–100,000/hour.
- Profit: 200,000–400,000 GP/hour.
Tips and Tricks to Master the Blast Furnace
Take your Blast Furnace game to the next level with these pro tips.
Efficiency Boosters
- Pre-Load Coal: Start with 26–54 coal in the furnace to avoid delays when switching ores.
- Stamina Management: Sip stamina potions every few trips; use the Barbarian vial smash perk for faster drinking.
- Bank Proximity: The bank chest is right next to the furnace—use it to minimize downtime.
Cost-Saving Hacks
- Ring of Charos (a): Halves the sub-60 Smithing fee.
- World Hopping Trick: Deposit ore on a non-Blast Furnace world, pedal manually, then hop to a Blast Furnace world to collect bars without the 72,000 GP fee (impractical for most, but viable for Ironmen).
Avoiding Common Mistakes
- Overloading Coal: Max coal storage is 254—don’t waste trips overfilling.
- Forgetting Fees: Keep the coffer topped up, or the dwarves stop working.
- Ignoring Weight: Heavy gear slows you down—stick to lightweight options.
With this Blast Furnace guide for OSRS, you’re ready to smelt your way to riches or a 99 Smithing cape in 2025. Whether you’re chasing XP with gold bars or banking profit with rune bars, the Blast Furnace offers unmatched efficiency. Load up your coal bag, equip those ice gloves, and get smelting—Keldagrim awaits!