Blast Furnace

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Blast Furnace
Blast Furnace.png
Released 23 August 2005 (Update)
Type Minigame
Members Yes
Location Keldagrim
Participants 1+
Skills Smithing, Firemaking, Strength, Agility, Crafting
Reward currency N/A
Tutorial No
Music Have a Blast

The Blast Furnace is a members-only minigame situated in Keldagrim that involves smelting bars in bulk. The furnace here only requires half as much coal compared to a usual one, which is useful when smelting high-tier ores that require more coal.

There are 15 Blast Furnace worlds on Old School RuneScape, all of which make soloing the Blast Furnace easy as there are five different dwarves—Dumpy, Stumpy, Pumpy, Numpty, and Thumpy—operating the mechanics of the Blast Furnace, so the player only has to focus on running the ores to the conveyor belt.

Requirements[edit | edit source]

  • Started Quest points The Giant Dwarf to gain access to Keldagrim.
  • Smithing 60 Smithing (cannot be boosted) or a 2,500 coins fee every 10 minutes. Equipping the ring of charos (a) will reduce the entrance fee to 1,250 coins, if you go through Blast Furnace Foreman's dialogue (Chat 1323).
    • On Blast Furnace themed worlds, there is an additional 72,000 coins fee to use the Blast Furnace for one hour; the fee is deposited in the coffer near the bank chest. On all other worlds, there is no extra fee but players must work together to operate the Blast Furnace.
  • While bars will cool down on their own with time, a bucket of water can be used at the bar dispenser to cool the heated bars immediately. An empty bucket spawn and water source can be found nearby.
    • Wearing ice gloves allows the player to retrieve bars directly and immediately and are strongly recommended, as they save an inventory space and reduce interactions needed.

Getting there[edit | edit source]

From Seers' Village and Camelot, follow this path.

The Blast Furnace is located in Keldagrim. To enter Keldagrim, the player must have started the The Giant Dwarf quest by speaking to the Dwarven Boatman within the mines east of Rellekka. The map on the right shows a path the player can take walking from Seers' Village/Camelot to the mines east of Rellekka. Once the player has visited Keldagrim at least once, they can return via mine cart from the Dwarven Mines under the Ice Mountain or the Grand Exchange, or use the Grouping teleport to teleport right outside the Blast Furnace building.

The Fairy ring system can be used in two ways: Either travel to ring dkr to go immediately west of the Grand Exchange, use its underwall tunnel north of the ring (requires 21 Agility) and then the mine cart, or travel to ring dks, which puts the player a short walk to the south-west to the Keldagrim entrance.

Experience rates[edit | edit source]

Full Smithing experience is gained from smelting the bars. There is also an anvil nearby to smith on, requiring level 60 Smithing to access.

At the Blast Furnace, the following Smithing experience rates can be gained producing bars. The tables assume that the player is wearing ice gloves and, when applicable, has a coal bag or goldsmith gauntlets in their inventory, leaving 27 inventory slots occupied by ore. Hybrid bar patterns utilize 26 inventory slots for ore, as they need both the coal bag and the goldsmith gauntlets.

For better rates, use the Barbarian vial smash perk unlocked through Alfred Grimhand's Barcrawl when sipping energy restores and stamina potions.

Bar Smithing  Smithing Default Coal bag
Level XP Bars/h XP/h Bars/h XP/h
Bronze bar inventory image Bronze 1 6.2 2900–3400 18.0k–20.1k No change
Iron bar inventory image Iron 15 12.5 5800–6850 72.5k–85.6k No change
Silver bar inventory image Silver 20 13.6 5800–6850 78.9k–93.2k No change
Steel bar inventory image Steel 30 17.5 2900–3400 50.8k–59.5k 4650–5450 81.4k–95.4k
Gold bar inventory image Gold 40 22.5 5800–6850 130.5k–154.1k No change
Goldsmith gauntlets inventory image Gold (gauntlets) 40 56.2 5600–6600 314.7k–370.9k No change
Smithing cape inventory image Gold (Smithing cape) 99 56.2 5800–6850 326.0k–385.0k[n 1] No change
Mithril bar inventory image Mithril 50 30 1900–2250 57.0k–67.5k 3150–3700 94.5k–111.0k
Mithril barGold bar Mithril hybrid[n 2] 50 43.1[n 3] N/A[n 4] 2225–2625 mithril
2225–2625 gold
Adamantite bar inventory image Adamantite 70 37.5 1450–1700 54.4k–63.8k 2400–2800 90.0k–105.0k
Adamantite barGold bar Adamantite hybrid[n 2] 70 50[n 3] N/A[n 4] 1475–1750 adamantite
2950–3500 gold
Runite bar inventory image Runite 85 50 1150–1350 57.5k–67.5k 1900–2250 95.0k–112.5k
Runite barGold bar Runite hybrid[n 2] 85 54.7[n 3] N/A[n 4] 1100–1300 runite
3300–3900 gold
  1. ^ At "tick-perfect" rates, players can achieve upwards of 420,000 experience per hour.
  2. ^ 2.0 2.1 2.2 Hybrid method combining smelting of gold and another primary ore. See /Strategies#Hybrid method.
  3. ^ 3.0 3.1 3.2 Average xp per bar of primary metal and gold with gauntlets.
  4. ^ 4.0 4.1 4.2 Hybrid bar patterns require the use of the coal bag.

Collecting raw materials[edit | edit source]

Raw materials can be obtained in two ways:

  1. Having ore in the bank, using the bank chest conveniently located in the Blast Furnace itself.
  2. Buying ore from Ordan who runs the Ore Seller shop (up to mithril). Ordan usually sells ore for cheaper than GE price while his stock is 50 or above, putting them in high demand and causing players to world-hop for them. Therefore, Ordan's stock will often be diminished, especially with coal, making it rarely profitable or advantageous to rely on it for on-site procurement.

Operating the Blast Furnace[edit | edit source]

A map of the Blast Furnace room itself.

IMPORTANT: Details of manual operation of the Blast Furnace itself are no longer listed. The official Blast Furnace worlds provide a great level of convenience to players, becoming the de-facto only way to use the Blast Furnace. Unless the player finds a group willing to run the furnace manually, it is nearly guaranteed one shall never encounter a player-run furnace. Most of the time, the various stations are used to train other skills instead. The process for operating the Blast Furnace is as follows:

  1. Place coal and/or ore on the Conveyor Belt.
  2. Cool down smelted bars with a bucket of water. Equipping ice gloves skips this step.
  3. Collect the bars from the bar dispenser and bank them.
  4. Repeat.

Notes[edit | edit source]

  • Caution: When smelting steel bars, make sure that coal is already loaded in the furnace, or at least deposited before the iron ore. Otherwise, the furnace will yield iron instead of steel.
  • The coal bag can be filled straight from the bank by using the Fill option on it, which is accessible with a shift-click.
  • The maximum amount of coal which may be placed in the Blast Furnace is 254, equating to 9 inventories.
  • The maximum amount of primary ores (the metal itself) which may be placed in the Blast Furnace is 28, and another 28 bars may be stored at one time. Attempting to place more than 28 primary ores without collecting the 28 bars in the dispenser results in an error that says: "You should collect your bars before making any more."
  • Logging out or disconnecting while only coal is upon the convevor belt results in permament loss of that coal. However, if the coal is paired with another ore, it will remain on the belt after disconnecting.
  • If using ice gloves and goldsmith gauntlets, remember not to equip the ice gloves UNTIL the smelting process is complete and the experience drops. Doing so too early negates the gauntlets' bonus. For safety, equip the gauntlets again as soon as the bars are collected.
  • On Blast Furnace activity worlds, the minimum amount of money required for a single run that should be deposited in the coffers is 109 coins if running, and 217 coins if walking. This requires standing north of the coffers and moving directly towards the conveyor belt on the same tick as depositing the coins.

Products[edit | edit source]

Adamantite bar.png1 × Adamantite bar
(Blast Furnace)
Member icon.png
  • Blast Furnace
  • Smithing 70
  • Smithing 37.5
Bronze bar.png1 × Bronze bar
(Blast Furnace)
Member icon.png
  • Blast Furnace
  • Smithing 1
  • Smithing 6.2
Gold bar.png1 × Gold bar
(Blast Furnace)
Member icon.png
  • Blast Furnace
  • Smithing 40
  • Smithing 22.5
Iron bar.png1 × Iron bar
(Blast Furnace)
Member icon.png
  • Blast Furnace
  • Smithing 15
  • Smithing 12.5
Mithril bar.png1 × Mithril bar
(Blast Furnace)
Member icon.png
  • Blast Furnace
  • Smithing 50
  • Smithing 30
Runite bar.png1 × Runite bar
(Blast Furnace)
Member icon.png
  • Blast Furnace
  • Smithing 85
  • Smithing 50
Silver bar.png1 × Silver bar
(Blast Furnace)
Member icon.png
  • Blast Furnace
  • Smithing 20
  • Smithing 13.7
Steel bar.png1 × Steel bar
(Blast Furnace)
Member icon.png
  • Blast Furnace
  • Smithing 30
  • Smithing 17.5

Ordan the Ore Seller[edit | edit source]

The Ore Seller, run by Ordan, is one of many of the stores in Keldagrim and can be found immediately west of the conveyor belt. 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 stocks 100 of a particular ore type the extra are "sent to storage".

Stock[edit | edit source]

Sells at: 150.0% • Buys at: 40.0% • Change per: 3.0%
in stock
sold at
bought at
Copper ore.pngCopper ore10016h 40m Coins 4.png 4Coins 1.png 1Coins 25.png 62
Tin ore.pngTin ore10016h 40m Coins 4.png 4Coins 1.png 1Coins 25.png 65
Iron ore.pngIron ore10016h 40m Coins 25.png 25Coins 5.png 6Coins 100.png 123
Mithril ore.pngMithril ore10016h 40m Coins 100.png 243Coins 25.png 64Coins 100.png 126
Silver ore.pngSilver ore10016h 40m Coins 100.png 112Coins 25.png 30Coins 25.png 57
Gold ore.pngGold ore10016h 40m Coins 100.png 225Coins 25.png 60Coins 100.png 210
Coal.pngCoal10016h 40m Coins 25.png 67Coins 5.png 18Coins 100.png 145

Changes[edit | edit source]

Date Changes
27 July 2022

The Blast Furnace is now a safe zone on PvP worlds, due to occasional incidents of luring around the bank chest.

9 September 2021

Pumping at the Blast Furnace to will now continue giving players Strength experience, even if the pipes are broken.

14 February 2019
(update | poll)

Items dropped in the Blast Furnace room will now only ever appear to the person who dropped them.

17 January 2019

The total amount of Blast Furnace themed worlds was increased from 7 to 15.

25 October 2018

Box traps may no longer be placed at Blast Furnace.

29 March 2018
(update | poll)

The Blast Furnace Bar Stock interface has been replaced with the new Make-all interface.

5 October 2017

You can now examine the Blast Furnace's Melting pot in order to check which ores, and how many, have been added to the Blast Furnace.

27 July 2017
(update | poll)

Two more dwarves were added to the themed worlds to repair broken pipes, cogs, and the drive belt. The hourly fee was raised to 72,000 coins.

4 May 2017

The message when adding ore to the Blast Furnace can now be disabled.

15 September 2016
(update | poll)

Three dwarves were added to Blast Furnace themed worlds, and will operate the furnace for an hourly fee of 60,000 coins.

11 August 2016
(update | poll)

A deposit box has been added to the Blast Furnace room.

14 April 2016
(update | poll)

Wearing ice gloves when at the Blast Furnace will now allow you to pick up bars without cooling them first.

6 August 2015

Players who intentionally overheat by using the pump too much at Blast Furnace will now be kicked out temporarily.

16 July 2015

Ensured that maximums of coal and tin of 254 are enforced in the Blast Furnace.

21 May 2015
(update | poll)

The Blast Furnace Foreman gained right-click options to pay for access to the Blast Furnace.

8 January 2015

A trading post has been added to the Blast Furnace Bank.

9 January 2014
(update | poll)

A bank chest has been added to the Blast Furnace room.

Gallery[edit | edit source]

Trivia[edit | edit source]

  • 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.
  • Oddly, the bar dispenser doesn't work while a dialogue box is open.