OSRS Blast Furnace guide 2026: fastest Smithing XP and profit at once
The Blast Furnace is a members-only minigame in Keldagrim focused on bulk smelting bars. Its furnace requires only half as much coal as a standard furnace, making it ideal for high-tier ores that need large coal quantities. Requirements: started The Giant Dwarf quest (for Keldagrim access); a 2,500-coins-per-10-minutes usage fee (waived at 60 Smithing, not boostable; Ring of Charos(a) halves it to 1,250); on official Blast Furnace worlds, deposit 72,000 coins/hour (12 gp/tick) into the coffer near the bank chest; and ice gloves, smiths gloves (i), or a bucket of water to cool bars quickly. On the 23 designated BF worlds, five dwarves operate all mechanics, so the player loop is: place coal/ore on the conveyor belt, collect cooled bars from the bar dispenser (auto-cooled with ice gloves/smiths gloves), use the nearby bank chest, repeat. Manual operation on non-BF worlds needs 30 Agility, Crafting, Firemaking and Strength. XP rates: gold with goldsmith gauntlets hits 315k-371k XP/h, and tick-perfect gold can exceed 420,000 XP/h; hybrid methods (gold + primary ore, needing coal bag + goldsmith gauntlets) push 280k+ XP/h; and smelting steel, mithril, adamantite or runite bars yields 1.7M-2.3M gp/hour.
Key takeaways
- Blast Furnace = Keldagrim minigame; furnace needs only half the coal, ideal for high-tier ores.
- Requirements: The Giant Dwarf started; fee waived at 60 Smithing (not boostable); official worlds = 72,000 gp/hour coffer.
- Bring ice gloves/smiths gloves (i) to collect bars instantly; goldsmith gauntlets for the XP bonus.
- Gold + goldsmith gauntlets = 315k-371k XP/h (tick-perfect >420k); hybrid methods push 280k+ XP/h.
- Profitable: smelting steel/mithril/adamantite/runite bars yields 1.7M-2.3M gp/hour; coal bag nearly doubles throughput.
What the Blast Furnace is
The Blast Furnace is a members-only minigame in Keldagrim focused on bulk smelting bars. Its key advantage is that the furnace requires only half as much coal as a standard furnace, which makes it ideal for high-tier ores that need large coal quantities — mithril, adamantite and runite in particular.
Access requires that you have started The Giant Dwarf quest for Keldagrim access. There is a 2,500-coins-per-10-minutes usage fee, which is waived at 60 Smithing (not boostable); a Ring of Charos(a) reduces the fee to 1,250 coins.
Official vs manual worlds
On the 23 designated Blast Furnace worlds, five dwarves (Dumpy, Stumpy, Pumpy, Numpty, Thumpy) operate all the mechanics for you. The player loop is: place coal/ore on the conveyor belt, collect cooled bars from the bar dispenser (auto-cooled if you wear ice gloves or smiths gloves), use the nearby bank chest, and repeat. On official worlds you deposit 72,000 coins/hour (12 gp/tick) into the coffer near the bank chest.
Manual operation on non-BF worlds requires 30 Agility, Crafting, Firemaking and Strength. The full manual loop is: load ore, crank the pedals to turn the belt, repair broken cogs/pipes/drive belt with a hammer, scoop coke with a spade, refuel the stove, pump the bellows (keeping pipes repaired), watch the temperature gauge so overheating does not break all parts, then cool and collect bars. The maintenance XP is trivial (1-2 XP/tick), so official worlds are almost always better for training.
XP rates and the best methods
The standout training method is gold with goldsmith gauntlets: 315,000-371,000 XP/h, and tick-perfect gold smelting can exceed 420,000 XP/h. The hybrid method — gold plus a primary ore, requiring a coal bag and goldsmith gauntlets — gives even higher rates: mithril hybrid ~191,800-226,300 XP/h, adamantite hybrid ~221,100-262,300 XP/h, and runite hybrid ~240,500-284,200 XP/h.
For bars that need coal, a coal bag nearly doubles throughput. Load coal before iron ore to avoid accidentally smelting iron instead of steel, and use shift-click "Fill" to fill the coal bag straight from the bank.
Profit and tips
The Blast Furnace can be profitable at the same time as training: smelting steel, mithril, adamantite or runite bars yields about 1.7M-2.3M gp/hour. Ordan (the Ore Seller) sells ore up to mithril, often below GE price, so expect world-hopping competition.
Tip: equip goldsmith gauntlets during smelting for the XP bonus, then swap to ice gloves to collect bars instantly. Exiting via the stairs pauses the coffer drain, so use it for breaks. The max load is 254 coal/tin and 28 primary ores in the furnace at once.
Questions players ask
What is the Blast Furnace in OSRS?+
A members-only minigame in Keldagrim that smelts bars using only half the coal of a normal furnace — the fastest Smithing training.
What level waives the Blast Furnace fee?+
60 Smithing waives the 2,500-coins-per-10-minutes fee (not boostable); Ring of Charos(a) halves it to 1,250.
What is the fastest Blast Furnace XP method?+
Gold with goldsmith gauntlets (315k-371k XP/h; tick-perfect >420k). Hybrid gold + primary ore with a coal bag pushes 280k+ XP/h.
Is the Blast Furnace profitable?+
Yes — smelting steel, mithril, adamantite or runite bars yields about 1.7M-2.3M gp/hour while training.
What do I bring to the Blast Furnace?+
Ice gloves or smiths gloves (i) to cool bars, goldsmith gauntlets for the XP bonus, a coal bag for coal bars, and coins for the coffer on official worlds.
Sources and verification
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