OSRS Blast Furnace Guide: How to Master the Minigame for XP and Profit

OSRS Blast Furnace Guide: How to Master the Minigame for XP and Profit


Old School RuneScape (OSRS) offers a variety of ways to train skills and make gold, and the Blast Furnace stands out as one of the best methods for Smithing enthusiasts. Located in Keldagrim, this members-only minigame allows players to smelt bars in bulk using half the coal required by a regular furnace. Whether you’re chasing massive Smithing XP rates or looking to turn a profit, this guide will walk you through everything you need to know about how to do the Blast Furnace in OSRS. From requirements to step-by-step instructions, we’ve got you covered!

The Blast Furnace isn’t just another Smithing method—it’s a game-changer. By cutting coal usage in half, it saves resources and boosts efficiency, making it ideal for smelting high-tier ores like mithril, adamantite, and runite. Plus, with the right setup, you can achieve some of the highest Smithing XP rates in the game, especially when smelting gold bars. It’s a win-win for players looking to level up fast or stack some OSRS gold.

Key Benefits of the Blast Furnace

  • Half Coal Usage: Smelt steel, mithril, adamant, and rune bars with 50% less coal compared to regular furnaces.
  • Bulk Smelting: Process entire inventories of ore at once, speeding up the process.
  • High XP Rates: Up to 370k–400k XP per hour with gold bars and goldsmith gauntlets.
  • Profit Potential: Smelt higher-tier bars like runite for decent gold per hour.

Requirements to Use the Blast Furnace

Osrs Gold Bars Blast Furnace Fastest Smithing Xp Quick Guide For Hot

Before you can jump into the Blast Furnace, you’ll need to meet a few requirements and gather some optional but highly recommended items. While the minigame is accessible to all levels, certain thresholds and gear will make your experience smoother and more efficient.

Mandatory Requirements

  • Start “The Giant Dwarf” Quest: This unlocks access to Keldagrim, the dwarven city where the Blast Furnace is located. You don’t need to complete the quest—just start it by speaking to the Dwarven Boatman east of Rellekka.
  • Membership: The Blast Furnace is a members-only feature.

Recommended Levels and Items

  • 60 Smithing: Avoids the 2,500 GP fee every 10 minutes charged to players below this level.
  • Ice Gloves: Dropped by the Ice Queen under White Wolf Mountain. These let you grab hot bars instantly from the dispenser, skipping the cooldown.
  • Coal Bag: Purchased for 100 golden nuggets from Prospector Percy at Motherlode Mine. Doubles your coal-carrying capacity to 27, essential for efficiency.
  • Goldsmith Gauntlets: Obtained from the Family Crest quest. Boosts XP when smelting gold bars (from 22.5 to 56.2 XP per bar).
  • Graceful Outfit: Reduces weight and helps maintain run energy during trips.
  • Stamina Potions: Keeps your run energy topped up for continuous operation.
  • Coins: 72k GP per hour on official Blast Furnace worlds (e.g., Worlds 352, 355, 358, 386, 387) to pay the dwarves operating the furnace.

How to Get to the Blast Furnace

Getting to the Blast Furnace is straightforward once you’ve unlocked Keldagrim. Here are the fastest travel methods to reach this Smithing hotspot.

Travel Options

  • Minigame Teleport: Use the Minigame Group Finder to teleport directly outside the Blast Furnace building (requires starting “The Giant Dwarf“).
  • Minecart: Take the minecart from the Grand Exchange or Dwarven Mines under Ice Mountain to Keldagrim, then head east to the furnace.
  • Fairy Ring (DKS): Teleport to DKS, run west to the cave entrance east of Rellekka, and speak to the Dwarven Boatman to enter Keldagrim. Walk east to the furnace.

Once in Keldagrim, look for the building with the furnace icon in the eastern part of the city. Head downstairs, and you’re at the Blast Furnace!

Step-by-Step Guide: How to Do the Blast Furnace

Now that you’re prepared and at the Blast Furnace, here’s how to operate it efficiently. The official Blast Furnace worlds (where dwarves handle the mechanics for 72k GP/hour) are the easiest way to go, so this guide focuses on that method.

Basic Process for Any Bar

  1. Deposit Coins: Put at least 72k GP in the coffer near the bank chest to cover an hour of operation.
  2. Bank Setup: Withdraw your coal bag, ice gloves (equipped), stamina potion, and ore. Fill your inventory and coal bag as needed.
  3. Load the Conveyor Belt: Click the conveyor belt to deposit your ore and coal (if required).
  4. Collect Bars: With ice gloves equipped, click the bar dispenser to grab your smelted bars instantly.
  5. Repeat: Return to the bank, restock, and keep the cycle going.

Smelting Gold Bars (Max XP)

For the highest XP rates (up to 400k/hour), smelt gold bars with goldsmith gauntlets.

  1. Equip goldsmith gauntlets and fill your inventory with 27 gold ore (no coal needed).
  2. Deposit the ore on the conveyor belt.
  3. Switch to ice gloves, collect the bars from the dispenser, then switch back to goldsmith gauntlets before the XP drop.
  4. Bank and repeat.

Tip: Preload 26 coal with your first gold ore run if you plan to mix in other bars later (see hybrid method below).

Smelting Steel, Mithril, Adamant, or Rune Bars (Profit)

For profit, focus on bars that require coal. Here’s a quick breakdown:

Bar Type Smithing Level Ore Needed Coal Needed XP per Bar
Steel 30 1 Iron 1 17.5
Mithril 50 1 Mithril 2 30
Adamant 70 1 Adamantite 3 37.5
Rune 85 1 Runite 4 50
  1. Start with coal: Fill your coal bag and inventory with coal (e.g., 54 coal for steel, 81 for adamant).
  2. Deposit coal on the conveyor belt.
  3. Bank, grab your ore (e.g., 27 iron for steel), and deposit it.
  4. Collect bars with ice gloves and repeat, adding coal as needed.

Hybrid Method: Gold + Other Bars

Combine gold smelting with profit bars to balance XP and GP losses.

  1. Deposit 26 coal and 26 gold ore per trip (using coal bag).
  2. Every 2–4 trips (depending on the bar—mithril: 2, adamant: 3, rune: 4), switch gold for mithril, adamant, or runite ore.
  3. Collect bars and repeat, maintaining coal levels.

This method nets ~200k XP/hour and reduces losses from pure gold smelting.

Tips and Tricks for Blast Furnace Success

Maximize your efficiency and profits with these expert tips.

Efficiency Boosters

  • Preload Coal: Stock the furnace with 200–250 coal before switching to hybrid or profit bars.
  • Tick-Perfect Gold: For max XP, deposit gold ore and click the dispenser in sync to minimize downtime.
  • Weight Management: Use the spottier cape and boots of lightness if ice gloves prevent a full graceful set.

Cost-Saving Hacks

  • Ring of Charos (a): Reduces the sub-60 Smithing fee to 1,250 GP (chat option 1-3-2-3 with the foreman).
  • Buy Ore from Ordan: The Ore Seller downstairs often has coal and ores cheaper than GE prices when stock is high.
  • World Hopping Trick: Deposit ore on a non-Blast Furnace world, hop to an official world, and collect bars without paying the 72k/hour fee (requires manual pedaling on the first world).

Common Mistakes to Avoid

  • Logging Out Mid-Run: Ore on the conveyor belt is lost if you disconnect.
  • Forgetting Ice Gloves: Without them, you’ll need a bucket of water, slowing you down.
  • Overloading Coal: The furnace caps at 254 coal—track your deposits.

With this OSRS Blast Furnace guide, you’re ready to smelt your way to Smithing glory or a hefty stack of gold. Whether you’re chasing 99 Smithing or funding your next adventure, the Blast Furnace is your ticket to success. Grab your gear, head to Keldagrim, and start smelting today!