Making the most use possible out of your Blast Furnace is essential to your armaments but it does require a few tasks that must be completed prior to OSRS GP. Be sure to stock up with GP as the tasks listed below will not be cheap: Begin 'The Giant Dwarf' quest to unlock Keldagrim. You'll need at least sixty smithing (with zero boosts) or alternatively, pay $2,500 to the Blast Furnace foreman to smelt bars for 10 minutes. Each hour at the Blast Furnace will use around 80,000 GP therefore, be prepared.
For a lower cost to enter I would suggest acquiring The Ring of Charos (a). It is recommended to avoid the 'pay' option with that Blast Furnace foreman because it will void the effects of the rings. The ring can be obtained during The Creature of Fenkenstrain questline.
The addition of Ice Gloves in the Blast Furnace will assist when using the bar dispenser, as it will cool the bars quickly enough for you to collect. This will save time, instead of getting buckets of water every time to cool your bars (and it'll free up space in the inventory as well).
Before you get started on how to get to the Blast Furnace itself it's important to know that it's only available within the worlds: 352, 355 and 358. It's also available in 386 and 387. After you've spoken to the Giant Dragon and moved to Keldagrim, you need to turn north and work your way across the bridge. Once you've crossed it continue to go south until you see an Blast Furnace icon on cheap RuneScape gold the map. Inside the designated building then walk down the stairs and you'll find the furnace itself.
