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Blast Furnace

The hectic furnace downstairs.

The Blast Furnace is a members-only minigame situated in Keldagrim for smelting bars which require coal. The furnace here only requires half as much coal when smelting usually, so it can be useful when smelting the ores that require more coal. It is designed to be used by a team, but it can also be worked by a single player if the correct strategy is followed or they are on a correct world.

The Blast Furnace worlds on Old School RuneScape are Worlds 352, 358, 386 and 387 and enable soloing the Blast Furnace easily: there are four different dwarves operating the mechanics of the Blast Furnace so the player only has to focus on running the ores to the conveyor belt.


Keldagrim map

The Blast Furnace can be accessed in East Keldagrim by going downstairs in the building with the furnace icon.

  • Smithing level 60 (cannot be boosted) or a 2500-coin entrance fee for 10 minutes of furnace use for smelting bars. The Ring of charos does reduce the entrance fee. (You must manually click on the dwarf and engage in dialogue where you will see the option for a reduced fee if wearing your ring of charos. Using quick pay through right clicking will NOT work)
  • Ice gloves/Bucket of water. The bucket of water is a group requirement, meaning that one person needs to throw a bucket of water at the bar dispenser for the rest of the group to be able to take it. However, this is only the case if the people involved do not have ice gloves. If you do have ice gloves, then you can always take the heated bars from the bar dispenser, whether it's cooled or not.
  • Coins to be able to use the blast furnace in World 358 and 386. It costs 72K gp/hour to be able to use it. You have to put it in the coffer near the bank chest. Note that if you leave the area and/or hop worlds, the coins in the coffer will NOT keep on decreasing.

Note that for teams, all of the following level requirements must be met for the team overall, not for each individual. However, players using the Blast Furnace on World 352, 358, 386 and 387 will not need these requirements, provided they pay the 72,000 coins per hour.

  • Firemaking level 30, for fueling up the stove.
  • Strength level 30, for pumping the stove (skillers can have someone else pump for them).
  • Agility level 30, for pedaling the conveyor belt.
  • Crafting level 30, for fixing the broken pipes and parts of the pedaling machine.

Traveling and getting to the Blast FurnaceEdit

Getting to Keldagrim

From Seers' Village or Camelot, follow this path.

Keldagrim north-east mine map

After arriving in Keldagrim, go to the east side of town and downstairs in the building marked with the furnace icon.

A player can only visit the Blast Furnace after visiting Keldagrim. To visit Keldagrim, the player must have started or completed the quest The Giant Dwarf. The player does not need the levels or items required to finish the quest; they must only start the quest by speaking to the Dwarven Boatman within the mines east of Rellekka whom takes them to Keldagrim. Once the player has visited Keldagrim, they can return via mine cart from the Dwarven Mines under Ice Mountain. The player can also use the Minigame Group Finder to be teleported outside the Blast Furnace building. To use this teleport, the player must have visited Keldagrim at least once. Alternatively, the player can also walk from Seers' Village/Camelot to Keldagrim via the path shown on the map in the upper-left. Once in Keldagrim, the player can run to the opposite (east) side of the town from the bank.

Players can also travel through the trap door West of the Grand Exchange to arrive in Keldagrim, saving time.

Suggested materials/inventory setupsEdit

Blast Furnace Map

A map of the Blast Furnace room itself.

  • Note: Remember to deposit coal first if not working with pure iron!

A spade can be picked up to refuel the stove with spadefuls of coal after depositing your ores on the conveyor belt. Coins can also be used to purchase ore there from Ordan.

Coins 10000 Stamina potion(4) Bucket of water Iron ore
Iron ore Iron ore Iron ore Iron ore
Iron ore Iron ore Iron ore Iron ore
Iron ore Iron ore Iron ore Iron ore
Iron ore Iron ore Iron ore Iron ore
Iron ore Iron ore Iron ore Iron ore
Iron ore Iron ore Iron ore Iron ore

Below 60 SmithingEdit

Coal bag Stamina potion(4) Bucket of water Coal
Coal Coal Coal Coal
Coal Coal Coal Coal
Coal Coal Coal Coal
Coal Coal Coal Coal
Coal Coal Coal Coal
Coal Coal Coal Coal

The suggested inventory for players below 60 Smithing is coins (to pay the fee every 10 minutes), a stamina potion, a bucket of water, and 25 ore. When using ice gloves, replace the bucket of water with a hammer.

60 Smithing and aboveEdit

The suggested inventory for players 60 Smithing and above is a coal bag, which helps greatly, a

stamina potion, a bucket of water, and 25 ore. When using ice gloves, replace the bucket of water with a hammer.

Experience ratesEdit

Full Smithing experience is gained from smelting the bars. There is also an anvil nearby to smith your bars, but it requires level 60 Smithing to access.

Additionally, maintaining the Blast Furnace also offers XP in other skills. However, this gives trivial XP:

Skill Action Experience
Agility Pedaling the conveyor belt 2 experience per second
Crafting Repairing the pipes or drive belt 50 experience
Strength Pumping 4 experience per second
Firemaking Putting coal in the stove 5 experience per load
Smithing Helping use the Blast Furnace 1 experience per bar loaded (by any other person)

At the Blast Furnace, the following Smithing XP can be gained producing bars. Moreover, the following assumes that the player has a coal bag, hammer, and bucket of water in his or her inventory, thus there are 25 inventory slots occupied by ore.

Bar Type Coal Needed
(in bag + in inventory = total)
Primary Ore # of Bank
Trips (from bank to furnace)
Bar Yield Total
XP [1]
Steel 25 + 0 = 25 25 Iron ore 1 25 437.5
Mithril 25 + 25 = 50 25 Mithril ore 2 25 750
Adamantite 25 + 25 + 25 = 75 25 Adamant ore 2 25 937.5
Runite 25 + 25 + 25 + 25 = 100 25 Rune ore 3 25 1,250
  1. You also get 1 XP per additional person loading if you help out. For example, if there are four other people excluding yourself, you'll get 4 Smithing XP extra.


The number of bars per hour will vary depending on team size and how quickly pipes are fixed.

BF Bars
  • Bronze: 950 - 1,250 bars per hour
  • Iron: 5,000 - 5,700 bars per hour (Blast Furnace has a 100% ore to bar ratio for iron)
  • Steel: 3,000 - 3,500 bars per hour
  • Gold/Silver: 5,000 - 5,700 bars per hour
  • Mithril: 2,500 - 3,000 bars per hour
  • Adamantite: 1,800 - 2,000 bars per hour
  • Runite: 1,500 - 1,600 bars per hour

Experience per hourEdit

  • Bronze: 6,000 - 7,000 XP per hour
  • Iron: 60,000 - 70,000 XP per hour
  • Steel: 50,000 - 60,000 XP per hour
  • Gold WITHOUT Gauntlets: 110,000 - 130,000 XP per hour
  • Gold WITH Gauntlets: 280,000 - 330,000 XP per hour
  • Mithril: 75,000 - 81,000 XP per hour
  • Adamantite: 67,500 - 75,000 XP per hour
  • Runite: 75,000 - 80,000 XP per hour

Collecting raw materialsEdit

Raw materials can be obtained in two ways:

  1. A player can have ore in their bank, and use the bank chest conveniently located in the Blast Furnace itself.
  2. Buy ore from Ordan who runs the Ore Seller shop (up to mithril). Ordan usually sells ore for cheaper than street price while his stock is 50 or above, so many players choose to supplement their supply of banked ores by buying ore from Ordan when his stock is high. Therefore, on a busy world, Ordan's stock will often be at less than the max of 100 (which is especially true with coal).

Operating the Blast FurnaceEdit

BF Plan

Blast Furnace plan

The process for operating the Blast Furnace is as follows:

Note: Most of these tasks are done for you by the dwarves running the blast furnace on the Blast furnace home worlds: 352, 358, 386 and 387. You just need to run your ore to the conveyor belt, and cool the bars yourself. For this service, it costs 72k coins per hr, but is highly recommended for speed of training.

  1. Place coal and/or ore on the Conveyor Belt.
  2. Turn the Conveyor Belt by operating the Pedals.
  3. Repair cogs or drive belt (if broken) using a hammer.
  4. Collect coke via using the spade to refuel the Stove.
  5. Operate the Pump.
  6. Repair pipes (if broken).
  7. Cool down smelted bars with a bucket of water from the sink.
  8. Collect the bars from the bar dispenser.
  9. Repeat.
  • Note: Always keep your coal bag full, and focus your run energy toward putting the maximum amount of coal on the conveyor belt, which is 254, although 225 or 250 is a decent amount for optimal Smithing. Sometimes, it will only allow you to place up to 225 coal max until your bars are finished. If you have 200 coal or under, you can usually place more coal on the belt. Afterwards, place a full load of your primary ore. The max amount of primary ore that may be placed is 28. Replenish your inventory with your primary ore, and place it on the belt after bars have been produced so that your bars can be processing while you bank your made bars.

Single-player strategyEdit

BF Solo

Blast Furnace camera spot: Keep an eye out for any broken pipes!

This can be hard work but it works.

  1. Collect the materials in the desired way.
  2. Place them on the conveyor belt (just left click on the belt to put them all on at once). Remember to place coal first if working with steel, mithril, adamant, or rune with the correct ratio of ores (1:1 iron to coal, 1:2 mithril to coal, 1:3 adamantite to coal, and/or 1:4 runite to coal). For the long haul, place 25 pieces of coal on the belt ten times (250 coal total) and then a load of 25 of your preferred ore afterwards each time.
  3. Pedal the conveyor belt so that the ores go into the furnace. Repair the drive belt or cogs if jammed. 
  4. Collect the hammer if you didn't bring one and/or the spade from their respawn places in the room. The hammer spawn point is in the north-east corner on a table, and the spade spawns on the floor next to the re-fuel area.
  5. Now, fuel up the machine. There's no point in only putting in a little fuel as it will run out when it's needed, so it's important to put enough in. Repeatedly click on "Collect Coke" and then "Refuel Stove." Notice the colour of the three lines on the stove to know if you've put enough in. The more fuel you put in results in the colour changing from brown to orange and then finally to red. When it is red, there's enough fuel, but adding a dozen more spadefuls of coke helps greatly.
  6. Now, move onto pumping the machine. First, check that there are no pipes broken. If there are, click on them, and you'll repair them with your hammer.
  7. Start pumping! Players do not need to check the gauge when pumping, contrary to popular belief. While pumping, position the 'camera' so one can see the bar dispenser, pipes, and stove top.
  8. Repair the drive belt, cogs, or any pipes that break while pumping. Sometimes, many will break and it will take a while; other times, none will break.
  9. When the bar dispenser turns a golden colour (and if the sound effects are on, one will hear a splat), stop pumping as the bars are done, or you'll get damaged by a blast of hot air.
  10. Collect the bucket if one isn't already in your backpack, and fill it with water from the sink, and use bucket with the bar dispenser.
  11. Collect the bars and repeat the whole process.

Clan strategyEdit

Clans working to run the Blast Furnace while other players pay the clan to operate the furnace is no longer relevant with Runescape's new update where five dwarves (Pumpy, Dumpy, Stumpy, Thumpy, and Numpty) operate the pump on the official Blast Furnace worlds at a cost of 72,000 coins per hour.

Blast Furnace W358

The five dwarves here operating the furnace are only available on Worlds 352, 358, 386 and 387.

Exclusive to Worlds 352, 358, 386 and 387, the official Blast Furnace worlds, players can place 72,000 coins into the coffer next to the bank chest to have five dwarves operate the pump (Pumpy), refuel the stove (Dumpy), pedal the pedals (Stumpy), repair the cogs and drive belt (Thumpy), and repair the broken pipes (Numpty) for one hour. Players will not be able to interfere with them, allowing the furnace to be operated at maximum efficiency. However, it may be wise to keep a hammer in your inventory since the furnace still breaks down and the NPCs don't repair them for you.

Ordan the Ore SellerEdit

Main articles: Ordan and Ore Seller

The Ore Seller, run by Ordan, is one of many of the stores in Keldagrim and can be found downstairs in the Blast Furnace factory in the eastern side of Keldagrim. This shop stocks ore used for Smithing. The shop is restocked by dwarves that regularly enter the room and deliver a number (around 30) of one type of ore to the shop, rather than restocking 1 of every ore periodically. When the shop reaches 100 of a particular ore type the extra are "sent to storage".


Item Number
in stock
sold at
bought at
Copper ore Copper ore 100 4 1 46
Tin ore Tin ore 100 4 1 54
Iron ore Iron ore 100 27 6 122
Mithril ore Mithril ore 100 243 64 174
Silver ore Silver ore 100 121 30 76
Gold ore Gold ore 100 225 60 346
Coal Coal 100 109 18 178

Possible methodsEdit

Note: There is a maximum of 254 coal and 56 primary ore in the furnace.

High-level oresEdit

All high-level ore, such as (adamantite and runite), must be in the player's bank as they cannot be bought from Ordan. Coal can be bought from Ordan, but the quantities required for high-level ore usually exhaust his stock after only making one inventory of bars. Therefore, it is recommended that players only use Ordan as a supplemental source and have most or all of the required coal in their bank.

Mithril-processing from the shopEdit

Ordan sells all types of ore up to mithril, which allows a player to train Smithing without mining ores. The process for smelting mithril bars is as follows:

  1. Purchase mithril and coal from Ordan in the ratio two coal per one mithril.
  2. Make two trips of 27 coal (or one trip if using a coal bag with a loaded inventory).
  3. Operate the Blast Furnace to obtain 27 mithril bars as described thoroughly in the aforementioned Single-player Strategy.
  4. Smith the bars into items and bank them or bank the bars directly using the Blast Furnace bank chest.
  5. One can repeat this until the shop runs out of ores. The coal supply generally runs out first; hence, players may need to switch to another world or supplement the store coal supply with banked coal.


  • Contrary to popular belief, the temperature of the stove does not affect the chance of a pipe becoming broken.
  • The conveyor belt that moves the ores into the furnace has three separate sections turning independently. However, only the outer two are connected to the pedal mechanism; the inner one turns by itself.
  • In the Q&A on 11 February 2010, Paul Gower stated that the Blast Furnace was created during an attempt to make a Smithing Guild.
  • Originally, the Blast Furnace did not have dwarves working on the machines. They were added due to player complaints of saboteurs breaking the machines constantly.