Making the most benefits Blast Furnace is critical to OSRS GP your armaments but it does require a few tasks to be completed beforehand. You should ensure that you're fully stocked with GP as the following tasks will not be cheap: Begin 'The Giant Dwarf' quest to unlock Keldagrim. You'll need at least 60smithing (with none of the boosts) or alternatively, you can pay 2500 towards the Blast Furnace foreman to smelt bars for 10 minutes. Each hour in the Blast Furnace will require 80,000 GP, so be prepared.
To cut down on the entrance cost It is recommended to purchase access to the Ring of Charos (a). However, avoid using the 'pay' option with your Blast Furnace foreman because it will invalidate the effects of the rings. You can get this ring during The Creature of Fenkenstrain questline.
Bring Ice Gloves to the Blast Furnace can help when you're using the bar dispenser, since it cools the bars quickly enough for you to pick up. This will save time, instead of getting buckets of water to cool your bars (and it'll help you save space in your inventory too!).
Before beginning this journey towards the Blast Furnace itself It's important to note that it's only available in the following worlds: 352 3, 355, 358 three86, and three87. Once you've completed the Giant Dwarf and proceeded into Keldagrim, you need to buy RS gold go north and make your way over the bridge. After you've crossed the bridge, continue south until you can see your Blast Furnace icon on the map. Once inside the marked building then walk down the stairs and you'll locate the furnace.