The Blast Furnace is a minigame activity for members only in OSRS that provides a faster way to smelt ores into bars. It is located in Keldagrim, the city of the Dwarves. The activity is efficient because it allows you to smelt bars using only half the typical coal required for a furnace. This makes it highly efficient for smelting ores that require coal, such as steel, mithril, adamantite, and runite, especially if you’re on an Ironman account where getting coal can be more difficult. It will also save you GP compared to using regular furnaces.
The main requirements to use the Blast Furnace are to have started The Giant Dwarf quest to access Keldagrim and to have a minimum of level 60 Smithing. It is beneficial to have ice gloves and goldsmithing gauntlets.
How to Get the Blast Furnace OSRS
To access the Blast Furnace in Old School RuneScape, you must first go to Keldagrim, the city of the Dwarves. If you've never been to Keldagrim, the journey begins from the Grand Exchange in Varrock. You'll find a trapdoor in the northwest corner of the Grand Exchange. Upon descending this trapdoor, you will enter a cave system. Within this cave, you'll encounter a boat operated by Dwarves. Engage in a conversation with them, and they will offer to transport you to Keldagrim. After a brief cutscene showcasing your journey along the river, you'll arrive.
Once in Keldagrim, the path to the Blast Furnace is relatively straightforward. From the place where the boat docks, head eastwards. As you traverse the city, you'll eventually come across a massive structure with large pipes and smoke emanating from it – this is the Blast Furnace. The entrance is marked, and upon entering, you'll find yourself at one of the most efficient ore-to-bar smelting locations in the game. Ensure you familiarize yourself with the requirements and mechanics of the Blast Furnace for the best experience.
Blast Furnace Worlds
At its core, the Blast Furnace is a cooperative minigame where players must perform various tasks to allow other players to smelt their bars. Jagex changed this in 2016 when they added dwarves that will work for you if you pay a fee. The current Blast furnace fee is 72k GP/hr, and the hour will pass as long as you are logged in, regardless of whether you are smelting. Thus, being in one of the 15 Blast Furnace worlds is essential.
| World | Location |
|---|---|
| 352 | Germany |
| 355 | United States (west) |
| 356 | United States (west) |
| 357 | United States (west) |
| 358 | United Kingdom |
| 386 | United States (east) |
| 387 | Australia |
| 395 | Germany |
| 424 | Australia |
| 466 | Germany |
| 494 | United States (east) |
| 495 | United States (east) |
| 496 | United States (east) |
| 515 | United Kingdom |
| 516 | United Kingdom |
OSRS Blast Furnace XP Rates
The Blast Furnace will give you the most competitive XP rates per hour, especially when it comes to smithing gold bars with the goldsmithing gauntlets.
| Bar | Smithing | Default | Coal bag | |||
|---|---|---|---|---|---|---|
| Level | XP | Bars/hr | XP/hr | Bars/hr | XP/hr | |
| Bronze | 1 | 6.2 XP | 2,900-3,400 | 18,000–20,100 XP/hr | No change | |
| Iron | 15 | 12.5 XP | 5,800-6,850 | 57,000–67,500 XP/hr | No change | |
| Silver | 20 | 13.6 XP | 5,800-6,850 | 78,900–93,200 XP/hr | No change | |
| Steel | 30 | 17.5 XP | 2,900-3,400 | 50,800–59,500 XP/hr | 4,650–5,450 | 81,400–95,400 XP/hr |
| Gold | 40 | 22.5 XP | 5,800-6,850 | 130,500–154,100 XP/hr | No change | |
| Gold (gauntlets) | 40 | 56.2 XP | 5,600-6,600 | 314,700–370,900 XP/hr | No change | |
| Gold (Smithing cape) | 99 | 56.2 XP | 5,800-6,850 | 326,000–385,000 XP/hr | No change | |
| Mithril | 50 | 30 XP | 1,900-2,250 | 57,000–67,500 XP/hr | 3,150–3,700 | 94,500–111,000 XP/hr |
| Mithril hybrid | 50 | 43.1 XP | N/A |
|
191,800–226,300 XP/hr | |
| Adamantite | 70 | 37.5 XP | 1,450-1,700 | 54,400–63,800 XP/hr | 2,400–2,800 | 90,000–105,000 XP/hr |
| Adamantite hybrid | 70 | 50 XP | N/A |
|
221,100–262,300 XP/hr | |
| Runite | 85 | 50 XP | 1,150-1,350 | 57,500–67,500 XP/hr | 1,900–2,250 | 95,000–112,500 XP/hr |
| Runite hybrid | 85 | 54.7 XP | N/A |
|
240,500–284,200 XP/hr | |
OSRS Blast Furnace Money Making
While smithing gold bars will bring you huge XP rates, smithing any other bars can be very profitable. However, this largely depends on the GE prices, so always double-check. Generally speaking, if you smith anything besides bronze and gold bars, you’ll earn a profit around the following values:
- Iron: Around 300k GP/hr
- Silver: Around 200k GP/hr
- Steel: Over 500k GP/hr
- Mithril: Around 400k GP/hr
- Adamantite: Around 700k GP/hr
- Runite: Around 1 million GP/hr
How to Earn OSRS Blast Furnace Profit
Besides the one type of bar strategy you can use at the Blast Furnace, there are combination strategies where you must use a coal bag, along with gold ore, for the first trip, collect it, and then bring more coal in the coal bag, and a different type of ore. These combination strategies will give you some profit and good XP, but you’ll get less XP than if just smithing gold bars and more GP than if smithing just other bars.
Gold and Mithril
You’ll need to make two trips: one with gold ore and the coal bag, and another with mithril and the coal bag.
Gold and Adamantite
You’ll need to do two trips with gold ore and the coal bag and one trip with Adamantite and the coal bag.
Gold and Runite
You’ll need to do three trips with gold ore and the coal bag and one trip with Runite and the coal bag.
All of these methods will give you roughly 200k XP/hr.
