Blast Furnace

This article has a strategy guide. All information on mechanics and strategy will be on this page.

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

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 standard one, which is useful when smelting high-tier ores that require more coal.

• Started The Giant Dwarf to gain access to Keldagrim.
• 2,500 coins per 10 minutes of use. 60 Smithing^{[not boostable]} allows you to skip this fee.
  • Equipping the ring of charos (a) will reduce the entrance fee to 1,250 coins, if you go through Blast Furnace Foreman's dialogue ( 1•3•2•3)…

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• On Blast Furnace themed worlds, 72,000 coins per hour (1,200 coins per minute) must be deposited into the coffer near the bank chest to pay the dwarven workers operating the blast furnace. The fee is time-based (12 coins per tick). Coins in the coffer are only spent while logged in at the Blast Furnace basement on a Blast Furnace world. The unspent amount can be withdrawn at any time, even in non-Blast Furnace worlds.
• On non-Blast Furnace themed worlds the furnace must be operated manually, see below.
• Ice gloves, smiths gloves (i), or a bucket of water are needed to cool down metal bars quickly, to avoid waiting for them to cool down with time.

The Blast Furnace is located in Keldagrim. To enter Keldagrim, the player must have started 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 Minigame 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.

Near the water pump and the coffer is a bank chest, which players can use to more efficiently use the furnace. Note that time spent with the bank chest interface open will deplete the coins in the coffer.

There are 22 Blast Furnace worlds (15 listed and 8 unlisted) 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. There is an additional 72,000 coins fee per hour (12gp/tick) to use the Blast Furnace on these worlds, which is deposited in the coffer near the bank chest.

As ore and coal in the blast furnace are not lost when hopping worlds, it is possible to deposit ore onto the conveyor belt on a non-Blast Furnace world and pedal manually to deposit it into the melting pot, and then hop to a blast furnace world to retrieve bars without utilising the blast furnace coffer. Although this strategy reduces cost, the cost of using the official blast furnace worlds is minimal compared to the cost of the ores involved, making this highly impractical for nearly all players. Furthermore, the foreman's fee of 2,500 GP doesn't stay when you hop worlds, so you must pay the bribe again (or half the bribe with Ring of charos (a)) for every time you hop back to the non-Blast Furnace world if you're under 60 Smithing.

World	Location	Members	Activity
352	Germany	1	Blast Furnace
355	United States (west)	1	Blast Furnace
356	United States (west)	1	Blast Furnace
357	United States (west)	1	Blast Furnace
358	United Kingdom	1	Blast Furnace
386	United States (east)	1	Blast Furnace
387	Australia	1	Blast Furnace
395	Germany	1	Blast Furnace
424	Australia	1	Blast Furnace
425	Australia	1	Blast Furnace (unlisted)
441	United States (west)	1	Blast Furnace (unlisted)
459	Germany	1	Blast Furnace (unlisted)
461	Germany	1	Blast Furnace (unlisted)
466	Germany	1	Blast Furnace
473	United States (east)	1	Blast Furnace (unlisted)
494	United States (east)	1	Blast Furnace
495	United States (east)	1	Blast Furnace
496	United States (east)	1	Blast Furnace
503	United Kingdom	1	Blast Furnace (unlisted)
515	United Kingdom	1	Blast Furnace
516	United Kingdom	1	Blast Furnace
541	United States (west)	1	Blast Furnace (unlisted)
566	United Kingdom	1	Blast Furnace (unlisted)

The following money making guides are available for Blast Furnace:

Method	Hourly profit	Skills
Smelting adamantite bars at Blast Furnace	2,090,205	70
Smelting mithril bars at Blast Furnace	1,647,405	50 (60+ recommended)
Smelting runite bars at Blast Furnace	2,556,852	85
Smelting steel bars at Blast Furnace	1,625,805	30 (60+ recommended)
Smelting iron bars at Blast Furnace	251,805	15 (60+ recommended)

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 or smiths gloves (i) and, when applicable, has a coal bag or goldsmith gauntlets in their inventory, leaving 27 inventory slots occupied by ore. Hybrid bar patterns utilise 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		Default		Coal bag
		Level	XP	Bars/h	XP/h	Bars/h	XP/h
	Bronze	1	6.2	2,900–3,400	18,000–20,100	No change
	Iron	15	12.5	5,800–6,850	72,500–85,600	No change
	Silver	20	13.6	5,800–6,850	78,900–93,200	No change
	Lead	25	15.5	2,900–3,400	45,000-52,700	No change
	Steel	30	17.5	2,900–3,400	50,800–59,500	4,650–5,450	81,400–95,400
	Gold	40	22.5	5,800–6,850	130,500–154,100	No change
	Gold (gauntlets)	40	56.2	5,600–6,600	314,700–370,900	No change
	Gold (Smithing cape)	99	56.2	5,800–6,850	326,000–385,000[n 1]	No change
	Mithril	50	30	1,900–2,250	57,000–67,500	3,150–3,700	94,500–111,000
	Mithril hybrid[n 2]	50	43.1[n 3]	N/A[n 4]		2,225–2,625 mithril 2,225–2,625 gold	191,800–226,300
	Adamantite	70	37.5	1,450–1,700	54,400–63,800	2,400–2,800	90,000–105,000
	Adamantite hybrid[n 2]	70	50[n 3]	N/A[n 4]		1,475–1,750 adamantite 2,950–3,500 gold	221,100–262,300
	Cupronickel	74	42	1,450–1,700[n 5]	60,900–71,400	No change
	Runite	85	50	1,150–1,350	57,500–67,500	1,900–2,250	95,000–112,500
	Runite hybrid[n 2]	85	54.7[n 3]	N/A[n 4]		1,100–1,300 runite 3,300–3,900 gold	240,500–284,200

Raw materials can be obtained in two ways:

1. Having ore in the bank, using the bank chest.
2. Buying ore from Ordan who runs the Ore Seller shop (up to mithril). Ordan usually sells ore cheaper than GE price, putting them in high demand and causing players to world-hop for them.

The official Blast Furnace worlds provide a great level of convenience and are the de-facto way to use the Blast Furnace. It is unlikely to find a player run furnace and, at most, the stations are used to train other skills. The process for operating the Blast Furnace on an official world is as follows:

1. Place coal and/or ore on the conveyor belt.
2. Cool down smelted bars with a bucket of water. This step can be skipped if ice gloves or smiths gloves (i) are equipped when collecting the bars.
3. Collect the bars from the bar dispenser.
4. Bank.
5. Repeat.

Manually operating the Blast Furnace requires 30 Agility, Crafting, Firemaking, and Strength. The process for operating the Blast Furnace manually is as follows:

1. Place coal and/or ore on the conveyor belt.
2. Turn the conveyor belt by operating the pedals.
3. Repair any broken cogs, pipes, or drive belt using a hammer.
4. Collect coke from storage using a spade to obtain a spadeful of coke.
5. Refuel the adjacent stove with the scooped-up coke.
6. Operate the pump, while keeping the pipes repaired.
7. Keep an eye on the temperature gauge to prevent the furnace from overheating.
8. Cool down smelted bars with a bucket of water from the sink. This step can be skipped if ice gloves or smiths gloves (i) are equipped.
9. Collect the bars from the bar dispenser.
10. Bank.
11. Repeat.

Using the no-payment world hopping strategy requires 30 Agility. The process for the World Hopping strategy is as follows:

1. Hop to a world that is not an official Blast Furnace world.
2. Load coal and/or ore on the conveyor belt. Load coal up to either the cap or the amount planned to be used if using coal, then load up to 28 ore.
3. If necessary, repair the drive belt using a hammer, requiring 30 Crafting. The Imcando hammer is preferred to save an inventory slot. Alternatively, begin the process on a world with a non-broken drive belt. Do not change worlds to hop to one with a functioning drive shaft while you have ores on the conveyor belt, as they will be lost.
4. Pedal for 4 ticks to deposit your ores into the Melting Pot.
5. Hop to an official Blast Furnace world.
6. Cool down smelted bars with a bucket of water from the sink. This step can be skipped if ice gloves or smiths gloves (i) are equipped.
7. Collect the bars from the bar dispenser.
8. Bank.
9. Repeat the process with your desired pattern, bulk-loading coal, if needed, every few cycles depending on consumption rate

• 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 and tin which may be placed in the Blast Furnace is 254 ores each, or a little over 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 conveyor belt results in permanent 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.
• Exiting via the stairs will stop the depletion of coins within the coffer, and can be used as a way to take breaks.
• A token amount of contribution experience is awarded to all participants when bars are dispensed during manual operation of the Blast Furnace.
• Hopping while pedalling may break the pedals in the target world. If hopping to a unofficial blast furnace world get off the bike to avoid leaving the conveyor belt stuck.

Product		Members	Facility	Skills	XP	Materials
	1 × Adamantite bar (Blast Furnace)		Blast Furnace	70	37.5	1 × Adamantite ore 3 × Coal
	1 × Bronze bar (Blast Furnace)		Blast Furnace	1	6.2	1 × Copper ore 1 × Tin ore
	1 × Cupronickel bar (Blast Furnace)		Blast Furnace	74	42	2 × Copper ore 1 × Nickel ore
	1 × Gold bar (Blast Furnace)		Blast Furnace	40	22.5	1 × Gold ore
	1 × Iron bar (Blast Furnace)		Blast Furnace	15	12.5	1 × Iron ore
	1 × Lead bar (Blast Furnace)		Blast Furnace	25	15.5	2 × Lead ore
	1 × Mithril bar (Blast Furnace)		Blast Furnace	50	30	1 × Mithril ore 2 × Coal
	1 × Runite bar (Blast Furnace)		Blast Furnace	85	50	1 × Runite ore 4 × Coal
	1 × Silver bar (Blast Furnace)		Blast Furnace	20	13.7	1 × Silver ore
	1 × Steel bar (Blast Furnace)		Blast Furnace	30	17.5	1 × Iron ore 1 × Coal

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".

Sells at: 150.0% • Buys at: 40.0% • Change per: 0.0%

Item		Number in stock	Restock time	Price sold at	Price bought at	GE price
	Copper ore	100	2m (200t)	4	1	10
	Tin ore	100	2m (200t)	4	1	10
	Iron ore	100	2m (200t)	25	6	76
	Mithril ore	100	2m (200t)	243	64	151
	Silver ore	100	2m (200t)	112	30	62
	Gold ore	100	2m (200t)	225	60	144
	Coal	100	2m (200t)	67	18	146

• The historical bar stock; replaced with Make-X
• Blast Furnace maintenance plan
• The building where the Blast Furnace resides

• 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.
• The bar dispenser doesn't work while a dialogue box is open.
• None of the transformation rings can be worn while operating the pump or pedals, as this would result in rather odd animations.
• There is a table at Blast Furnace which items can be placed upon for up to 10 minutes without becoming visible to other players. This may be useful to Ultimate Ironmen.

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