Blast Furnace

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The Blast Furnace is a members-only minigame situated in Keldagrim for smelting bars. 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.

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]

The Blast Furnace can be accessed in East Keldagrim by going downstairs in the building with the furnace icon.
  • Start The Giant Dwarf to gain access to Keldagrim.
  • Smithing level 60 (cannot be boosted) or a 2500-coin fee to smelt bars with the furnace for 10 minutes. The ring of charos (a) does reduce the entrance fee. (You must manually click on the Blast Furnace Foreman 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) (Chat 1323)
  • Ice gloves or bucket of water (optional), used at the bar dispenser to cool the heated bars as they come out. An empty bucket can be found near the water source. You can also wait for the bars to cool before taking them out.
  • Coins to be able to use the blast furnace in designated worlds. 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 decrease.

Travelling and getting to the Blast Furnace[edit | edit source]

From Seers' Village or Camelot, follow this path.

The Blast Furnace is located in Keldagrim. To enter Keldagrim, the player must have started the quest The Giant Dwarf by speaking to the Dwarven Boatman within the mines east of Rellekka. The map on the left 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 Ice Mountain or the Grand Exchange, or use the Minigame Group Finder to teleport right outside the Blast Furnace building.

Suggested materials/inventory setups[edit | edit source]

A map of the Blast Furnace room itself.
  • Note: Remember to deposit coal first if not working with pure iron or gold!

It is heavily recommended to wear weight-reducing clothing to save run energy while moving heavy ore and smelted bars; if you are using ice gloves or goldsmithing gauntlets you won't be able to benefit from the full graceful outfit bonus and it will be more efficient to use the spottier cape and boots of lightness rather than their graceful counterparts. Coins can also be used to pay the Blast Furnace Foreman for more time or to purchase ore there from Ordan.

Below 60 Smithing[edit | edit source]

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 an ore.

60 Smithing and above[edit | edit source]

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 an ore.

Experience rates[edit | edit source]

Full Smithing experience is gained from smelting the bars. There is also an anvil nearby to smith your bars, which the foreman will let you use if you have level 60 Smithing.

At the Blast Furnace, the following Smithing XP can be gained producing bars. Moreover, the following assumes that the player has a coal bag in their inventory and are wearing ice gloves, thus there are 27 inventory slots occupied by ore.

Bars[edit | edit source]

  • Bronze: 2,700 - 3,000 bars per hour
  • Iron: 5,700 - 6,000 bars per hour (Blast Furnace has a 100% ore to bar ratio for iron)
  • Steel: 5,100 - 5,400 bars per hour
  • Gold/Silver: 5,700 - 6,000 bars per hour
  • Mithril: 3,300 - 3,600 bars per hour
  • Adamantite: 2,400 - 2,700 bars per hour
  • Runite: 1,850 - 2,150 bars per hour

Experience per hour[edit | edit source]

  • Bronze: 16,500 - 18,500 XP per hour
  • Iron: 70,000 - 75,000 XP per hour
  • Steel: 90,000 - 95,000 XP per hour
  • Silver: 78,000 - 82,000 XP per hour
  • Gold WITHOUT goldsmith gauntlets: 128,000 - 135,000 XP per hour
  • Gold WITH goldsmith gauntlets: 320,000 - 340,000 XP per hour
  • Mithril: 99,000 - 108,000 XP per hour
  • Adamantite: 90,000 - 101,000 XP per hour
  • Runite: 92,500 - 107,500 XP per hour

Money making methods[edit | edit source]

The Blast Furnace provides a great opportunity for players to reap great profits by producing a large volume of bars. Note: The numbers below have already taken into account the 72k per hour for using a designated blast furnace world. These numbers assume you use a coal bag, ice gloves, and 30 doses of stamina potions per hour. Always check current selling prices, as these numbers can change frequently.

Level Bar Method Profit Bars/Hour XP/Hour
15 Iron bar.png Iron bars 118,545 6000 75,000
30 Steel bar.png Steel bars 1,050,345 5400 94,500
50 Mithril bar.png Mithril bars 677,745 3600 108,000
70 Adamantite bar.png Adamantite bars 1,576,845 2700 101,250
85 Runite bar.png Runite bars 1,804,945 2150 107,500

Collecting raw materials[edit | edit source]

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 Furnace[edit | edit source]

Blast Furnace plan

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 or just collect the bars with the ice gloves equipped.
  3. Collect the bars from the bar dispenser.
  4. Repeat.

Note: All of the other tasks described by the Foreman are done for you by the dwarves running the Blast Furnace on the designated Blast Furnace worlds. For this service, it costs 72,000 coins per hour, but is highly recommended for speed of training.

Notes
  • Always keep your coal bag full.
  • The max amount of primary ore that may be placed is 56.
  • The max amount of gold ores you can place is 28. If you try to place more gold ores without collecting the 28 gold bars you have, you will get an error that says "You should collect your bars before making any more." If you notice you're only getting 56 or 57 xp when smelting gold bars instead of 1517 or 1518, you might have forgotten to collect your 27 gold bars. There appears to be an in-game bug that lets you deposit up to 28 more gold ores after having placed 27. Doing this will give you the 56.2 xp for smeling gold bars with the goldsmith gauntlets until you've reached the 28 waiting to be collected, and then you will get 22.5 * the amount of extra gold bars when you collect them. This will show that you have only 28 gold bars to be collected, but there might be up to 55 gold bars to be collected.
  • If for whatever reason you log out or disconnect while ores are on the conveyor belt, those ores will be lost.

Ordan the Ore Seller[edit | edit source]

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".

Stock[edit | edit source]

ItemNumber
in stock
Price
sold at
Price
bought at
GE
price
Copper ore.pngCopper ore100Coins 4.png 4Coins 1.png 1Coins 25.png 51
Tin ore.pngTin ore100Coins 4.png 4Coins 1.png 1Coins 25.png 43
Iron ore.pngIron ore100Coins 25.png 25Coins 5.png 6Coins 25.png 52
Mithril ore.pngMithril ore100Coins 100.png 243Coins 25.png 64Coins 100.png 115
Silver ore.pngSilver ore100Coins 100.png 112Coins 25.png 30Coins 25.png 53
Gold ore.pngGold ore100Coins 100.png 225Coins 25.png 60Coins 100.png 200
Coal.pngCoal100Coins 25.png 67Coins 5.png 18Coins 100.png 129

Possible methods[edit | edit source]

Note: There is a maximum of 254 coal and 56 primary (or 28 adamantite) ore in the furnace.

High-level ores[edit | edit source]

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.

An example of mithril-processing using the shop[edit | edit source]

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 section Operating the Blast Furnace.
  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.

Bar Patterns[edit | edit source]

Each bar has a optimal pattern to minimize the amount of running to the bank. Following these patterns you should never have to run back to the bank with ores, and never have to make a trip just to pick up bars. These patterns assume you have a coal bag. It is also easier to keep an extra 27 coal in the furnace to so there is less delay for your bars to be ready.

Level Bar Trip 1 Trip 2 Trip 3 Trip 4 Trip 5
30 Steel bar.png Steel bars 27 Coal, 27 Iron, Collect
50 Mithril bar.png Mithril bars 54 Coal 27 Coal, 27 Mith, Collect 27 Coal, 27 Mith, Collect
70 Adamantite bar.png Adamantite bars 54 Coal 27 Coal, 27 Addy, Collect
85 Runite bar.png Runite bars 27 Coal, 27 Rune 54 Coal 54 Coal, Collect 27 Coal, 27 Rune 54 Coal, Collect

Changes[edit | edit source]

Date Changes
17 January 2019
(update)
The total amount of Blast Furnace themed worlds was increased from 7 to 15.
9 January 2014
(update | poll)
A bank chest has been added to the Blast Furnace room.
8 January 2015
(update)
A trading post has been added to the Blast Furnace Bank.

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.