OSRS Blast Furnace Complete Guide for High XP & Profits

Welcome to the Ultimate OSRS Blast Furnace Guide: The Blast Furnace is a specialized facility in Old School RuneScape (OSRS) for smelting bars with increased efficiency compared to traditional methods. Located in the Dwarven city of Keldagrim, it’s a communal area where players can smelt ores into bars. The Blast Furnace stands out due to its unique mechanics and requirements, offering a highly efficient way to gain Smithing experience and produce bars.

Overview of the OSRS Blast Furnace

The Blast Furnace offers two main advantages over standard furnaces found throughout Gielinor. Firstly, it can smelt an entire inventory of ore in just seconds, significantly speeding up the Smithing process. Secondly, it only requires half the usual amount of coal to smelt bars, which can lead to substantial savings in resources over time. This efficiency is due to the specialized machinery and the efforts of dwarf NPCs who operate the furnace, allowing for the rapid processing of ores.

Benefits of Using the Blast Furnace

  1. High Smithing Experience Rates: Players can achieve up to 400k+ Smithing XP per hour, especially when smelting gold bars with goldsmith gauntlets. This makes the Blast Furnace one of the fastest methods to level up Smithing in the game.
  2. Resource Efficiency: The requirement of only half the usual coal amount for smelting bars means players can save on resources, making it cost-effective, especially for high-level bars like adamant and rune.
  3. Profitability: While smelting gold bars is an experience-focused activity, smelting other bars like steel, mithril, adamant, and rune can be profitable. The reduced coal requirement and the speed of smelting combine to make the Blast Furnace a lucrative option for players looking to make money through Smithing.
  4. Accessibility: The Blast Furnace is accessible after starting “The Giant Dwarf” quest, making it available to a wide range of players, including those in the early to mid-levels of their Smithing journey.

Getting Started with Blast Furnace

To begin using the Blast Furnace in Old School RuneScape (OSRS), players need to meet certain quest and level requirements. These prerequisites ensure that players can access and efficiently use the Blast Furnace for smithing.


Quest Requirements:

  • The Giant Dwarf: Players must have started “The Giant Dwarf” quest to gain access to Keldagrim, where the Blast Furnace is located. Completing the quest is not necessary, but starting it is crucial for entering the city and using its facilities.

Level Requirements:

  • Smithing Levels: The minimum Smithing level required to use the Blast Furnace effectively varies depending on the type of bar being smelted. However, specific tasks within the Blast Furnace can be performed with no Smithing level requirement, but to smelt bars, certain levels are needed:
    • Iron bars: Level 15 Smithing
    • Steel bars: Level 30 Smithing
    • Mithril bars: Level 50 Smithing
    • Adamant bars: Level 70 Smithing
    • Rune bars: Level 85 Smithing
    • Gold bars, notably for XP efficiency, require Level 40 Smithing and are highly recommended to be smelted with goldsmith gauntlets for additional experience.
  • Operating Cost: For all players, regardless of their Smithing level, there’s an operational cost to use the Blast Furnace:
    • Players under level 60 Smithing must pay 2,500 coins every 10 minutes to the Blast Furnace Foreman for access, whereas players at level 60 Smithing and above can use the furnace for free. However, an hourly fee is still deducted from the coffer to pay the NPC workers for operating the machinery.

For an efficient Blast Furnace operation, certain gear and items are highly recommended. These enhance the smelting process by either reducing resource requirements, increasing experience rates, or improving player stamina and movement speed.

Ice Gloves and Goldsmith Gauntlets:

  • Ice Gloves: Obtained by defeating the Ice Queen located in the White Wolf Mountain. Ice Gloves are essential for handling hot bars directly from the bar dispenser without waiting for them to cool down. This significantly speeds up the bar collection process.
  • Goldsmith Gauntlets: A reward from completing the “Family Crest” quest. When worn, these gauntlets significantly increase the Smithing experience gained from smelting gold bars. Specifically, they boost the experience from 22.5 to 56.2 XP per gold bar, making gold smelting at the Blast Furnace the fastest Smithing experience in the game. Players should switch to these gauntlets before collecting gold bars from the dispenser.

Coal Bag:

  • Coal Bag: Available for purchase from the Prospector Percy’s Nugget Shop within the Motherlode Mine for 100 golden nuggets. The coal bag can hold up to 27 pieces of coal, effectively doubling the amount of coal a player can carry per trip. This is particularly useful for smelting ores that require coal, as it reduces the number of trips needed to supply the furnace with coal, thereby increasing efficiency for smelting higher-tier bars such as Mithril, Adamant, and Rune.

Graceful Outfit:

  • Graceful Outfit: A full set is obtained by trading in marks of grace, which are collected by completing rooftop agility courses. The outfit reduces the player’s weight, significantly slowing the rate at which run energy depletes. This is especially beneficial at the Blast Furnace, where players make numerous trips between the bank and the furnace, allowing for continuous running without needing to walk or rest.

Stamina Potions:

  • Stamina Potions: These potions are crucial for maintaining run energy over extended periods. Given the constant running back and forth between the bank, the conveyor belt, and the bar dispenser, consuming stamina potions ensures that players can keep running without depleting their energy, thereby maximizing the number of trips made per hour and overall efficiency at the furnace.

Accessing the Blast Furnace

Location and How to Get There:

  • The Blast Furnace is located in the Dwarven city of Keldagrim. To access Keldagrim for the first time, players must start “The Giant Dwarf” quest. After starting the quest, players can access Keldagrim by various methods, one of which includes using the trap door located in the northwestern part of the Grand Exchange. This leads to a transportation network that takes players directly into the city. Once in Keldagrim, the Blast Furnace is found on the east side of the city.

Using the Minigame Teleport:

  • After the initial visit, players can utilize the minigame teleport directly to the Blast Furnace. This is accessed through the minigame group finder, allowing for a quick and easy teleportation method straight to the furnace. This option is particularly useful for players who are making multiple trips to the Blast Furnace, as it significantly reduces travel time.

The Coffer and Operating Costs:

  • The Coffer: To use the Blast Furnace, players must pay the dwarves operating it. This payment is managed through a coffer located near the bank chest at the Blast Furnace. Players need to deposit coins into the coffer, which are then automatically deducted over time to cover the operating costs. The coffer ensures that the furnace keeps running and that players don’t have to manually pay the dwarves every few minutes.
  • Operating Costs: The operating costs vary based on the player’s Smithing level. Players with a Smithing level below 60 are required to pay 2,500 coins every 10 minutes to use the furnace. For players with Smithing levels 60 and above, the cost is absorbed into a standard operating fee, which is deducted from the coffer. Regardless of Smithing level, all players need to ensure the coffer has sufficient funds to keep the furnace operational during their smithing session. Additionally, an hourly fee of 72,000 to 80,000 coins is deducted from the coffer to pay for the NPC workers, depending on the player’s Smithing level.

Basic Operations at the Blast Furnace

Understanding the Blast Furnace Layout:

  • The Blast Furnace is a complex facility with several key areas players need to familiarize themselves with for efficient operation. Key components include the conveyor belt for ore deposit, the water cooling system (necessary if not using ice gloves), the bar dispenser where smelted bars are collected, and the bank chest for quick banking. The furnace operates in a cycle, where ores are first deposited on the conveyor belt, then smelted in the furnace, and finally, bars are collected from the dispenser.

Roles of NPCs and Player Actions:

  • NPCs at the Blast Furnace play crucial roles in its operation. Dwarven workers manage the furnace’s temperature, pump the bellows, and operate the conveyors and coke. Players must interact with these NPCs to ensure the Blast Furnace runs smoothly. This includes paying them for their services through the coffer.
  • Player Actions involve depositing ores into the conveyor belt, paying the dwarves (if under level 60 Smithing), and collecting the smelted bars from the bar dispenser. For maximum efficiency, players need to manage their inventory correctly, wear appropriate gear (ice gloves for collecting bars and goldsmith gauntlets for smelting gold), and keep the coffer funded.

Managing the Coffer and Payments:

  • The Coffer is essential to the Blast Furnace’s operation. Players must deposit coins into the coffer, which are then used to pay the dwarves for their continuous operation of the furnace. The amount deducted from the coffer depends on the player’s Smithing level: players under level 60 Smithing are charged a fee every 10 minutes, while those at or above level 60 Smithing will have a different rate deducted to cover operational costs.
  • Payments to the coffer are crucial for uninterrupted use of the Blast Furnace. The coffer ensures that the facility remains operational by automatically deducting fees. Players should regularly check the coffer to ensure it has enough funds to cover the operating costs, especially during long smithing sessions. Overpayment into the coffer is safeguarded, as players can withdraw any excess coins they have deposited.

Smelting Different Types of Bars

Smelting Gold Bars:

Gold bars are highly sought after in the Blast Furnace due to their exceptional Smithing experience rates. Utilizing goldsmith gauntlets, players can significantly increase the XP gained from smelting gold ores into bars, making it one of the fastest methods to level up Smithing in OSRS.

Equipment and Inventory Setup:

  • Goldsmith Gauntlets: Essential for maximizing XP, obtained from completing the “Family Crest” quest. Players should wear these gauntlets when collecting gold bars from the dispenser.
  • Ice Gloves: To instantly grab hot bars from the dispenser without waiting for them to cool down. If players do not have ice gloves, they must wait for bars to cool before collecting or use buckets of water, which is less efficient.
  • Stamina Potions: To maintain run energy for constant movement between the bank, conveyor belt, and bar dispenser.
  • Coal Bag (Optional for gold bars but useful for managing inventory when smelting other types of bars requiring coal).

Step-by-Step Gold Smelting Process:

  1. Preparation:
    • Equip goldsmith gauntlets.
    • Fill your inventory with gold ore.
    • Ensure the coffer has sufficient funds for the session.
  2. Depositing Ore:
    • Approach the conveyor belt and deposit your inventory of gold ore. This action is automated once you click the conveyor belt with a full inventory of ore.
  3. Collecting Bars:
    • Switch to ice gloves (if not already wearing them) immediately after depositing ores.
    • Wait briefly for the ores to be smelted. The Blast Furnace smelts an entire inventory of gold ore in just a few seconds.
    • Collect the smelted gold bars from the bar dispenser. Ensure you’re wearing the ice gloves to do this instantly.
  4. Maximizing XP:
    • Before collecting the bars from the dispenser, switch back to goldsmith gauntlets to maximize the Smithing XP received per bar.
    • The switch must be done quickly to benefit from the XP boost the gauntlets provide.
  5. Repeat the Process:
    • Return to the bank, deposit the gold bars, and refill your inventory with gold ore.
    • Drink a sip of stamina potion if your run energy is low to maintain efficiency.
    • Continue the cycle of depositing ore, switching gloves, and collecting bars for the duration of your Smithing session at the Blast Furnace.

Smelting Profitable Bars (Steel to Rune)

Smelting bars from steel to rune at the Blast Furnace not only offers significant Smithing experience but also the potential for profit. The reduced coal requirement at the Blast Furnace makes these operations more resource-efficient and profitable.

Preparing Coal and Ore Ratios

Steel Bars:

  • Coal and Ore Ratio: 2 coal for 1 iron ore.
  • Preparation involves ensuring you have twice as much coal as iron ore. Utilizing the coal bag can significantly enhance efficiency by carrying additional coal per trip.

Mithril Bars:

  • Coal and Ore Ratio: 4 coal for 1 mithril ore.
  • Similar to steel, but requires double the coal. It’s essential to make multiple trips or utilize the coal bag effectively to manage the higher coal requirement.

Adamant Bars:

  • Coal and Ore Ratio: 6 coal for 1 adamantite ore.
  • The ratio increases further, demanding efficient use of the coal bag and careful planning of inventory space to maximize the number of bars smelted per trip.

Rune Bars:

  • Coal and Ore Ratio: 8 coal for 1 runite ore.
  • The most coal-intensive smelting process, requiring careful inventory and coal bag management to optimize the number of rune bars produced efficiently.

Sequential Steps for Each Bar Type

Steel Bars:

  1. Fill the coal bag with coal and carry an inventory of iron ore.
  2. Deposit the first load of coal, then iron ore, into the conveyor belt.
  3. Use the coal bag to deposit the second load of coal.
  4. Collect the smelted steel bars from the bar dispenser.

Mithril Bars:

  1. Make two trips to deposit coal (4 units of coal per mithril ore), utilizing the coal bag for additional coal capacity.
  2. On the third trip, deposit mithril ore along with any remaining coal required.
  3. Collect the smelted mithril bars from the dispenser.

Adamant Bars:

  1. Similar to mithril, but requires three trips to deposit the necessary coal (6 units of coal per adamantite ore).
  2. Deposit adamantite ore on the fourth trip, ensuring the correct coal ratio is maintained.
  3. Collect the adamant bars once smelted.

Rune Bars:

  1. Requires four coal deposit trips to meet the 8:1 coal to runite ore ratio.
  2. On the fifth trip, deposit runite ore along with any remaining necessary coal.
  3. Once smelting is complete, collect the rune bars from the dispenser.

For all bar types, it’s crucial to manage the coffer and ensure sufficient funds to keep the furnace operational. Additionally, using items like ice gloves (for quick bar collection) and stamina potions (for sustained running) can enhance the efficiency of smelting these profitable bars at the Blast Furnace.

Advanced Techniques and Tips

Efficient Inventory Management:

Efficient inventory management is crucial for optimizing the number of trips made to the Blast Furnace and maximizing the amount of ore smelted per hour. Key strategies include:

  • Utilizing the Coal Bag: Fill the coal bag with coal to maximize the amount of ore and coal you can carry per trip, especially when smelting bars that require coal.
  • Wearing Ice Gloves: Allows for the immediate collection of bars from the dispenser, saving time by eliminating the need to wait for bars to cool down.
  • Carrying Stamina Potions: Keeping stamina potions in your inventory ensures you can maintain your run energy, allowing for faster movement between the bank, the conveyor belt, and the bar dispenser.

Maximizing XP and Profit:

To maximize XP and profit at the Blast Furnace, players should consider:

  • Smelting Gold Bars for XP: Wearing goldsmith gauntlets while smelting gold bars significantly increases XP rates, making it one of the fastest methods to level Smithing.
  • Choosing Profitable Bars for Money: Steel, mithril, adamant, and rune bars offer profitable returns. The choice of bar to smelt for profit depends on current market prices and the player’s Smithing level.

Balancing Gold Bars with Profitable Bars:

Balancing the smelting of gold bars with profitable bars allows players to efficiently gain XP while also making a profit. Strategies include:

  • Alternate Between Gold and Profitable Ores: Smelt gold bars in between batches of profitable bars to maintain a balance between earning XP and making money. This approach can help offset the cost of buying gold ore.
  • Use Coal Bag for Efficiency: When alternating between gold and ores that require coal, use the coal bag to transport coal efficiently. This minimizes trips and maximizes the amount of ore smelted.
  • Monitor Market Prices: The profitability of different bars can vary with market fluctuations. Players should stay informed about current prices to decide the most profitable bars to smelt alongside gold.

Utilizing RuneLite Plugins for Efficiency

Menu Entry Swapper:

The Menu Entry Swapper plugin in RuneLite simplifies certain actions by changing the default option that appears when hovering over objects or NPCs. In the context of the Blast Furnace:

  • Direct Use of Machinery: Players can customize the plugin to prioritize certain actions, such as “Empty” for the coal bag or “Deposit-All” for ores into the furnace, speeding up the process of depositing materials and managing inventory.
  • Quick Banking: By adjusting the default banking options, players can streamline their banking process, allowing for faster withdrawals and deposits of ores, bars, and other essentials.

Bank Tags and Layouts:

Bank Tags and Layouts offer a way to organize and access gear, ores, bars, and potions more efficiently:

  • Creating Custom Tabs: Players can create custom tags for all items related to the Blast Furnace. This includes ores, coal, ice gloves, goldsmith gauntlets, and stamina potions, making it easier to switch between different smelting setups.
  • Optimizing Layouts: By organizing items within these tagged tabs, players can minimize movement within the bank interface, ensuring that all necessary items are quickly accessible, reducing downtime between smelting runs.

Screen Markers:

Screen Markers aid in precise clicks and efficient navigation within the Blast Furnace area:

  • Marking Important Areas: Players can place markers around critical areas on their screen, such as the bank chest, conveyor belt, bar dispenser, and the coffer. This helps in developing a consistent routine, reducing misclicks, and improving overall efficiency.
  • Path Optimization: By marking specific walking paths or standing points, players can find the most efficient routes between the various stations of the Blast Furnace, ensuring minimal time is wasted moving around.

Implementation for Blast Furnace Efficiency

By leveraging these RuneLite plugins, players can significantly enhance their efficiency at the Blast Furnace. The Menu Entry Swapper allows for quicker interactions with items and machinery, Bank Tags and Layouts facilitate faster gear and material management, and Screen Markers assist in navigating the Blast Furnace with precision. Together, these tools enable players to optimize their smelting processes, leading to more effective XP gain and profit-making activities.

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