Making the most use possible out of your Blast Furnace is vital for your armaments but it does require some tasks to be done prior to
Buy RuneScape Gold. Make sure you're well-stocked with GP because the next tasks will not be cheap: Begin 'The Giant Dwarf' quest to gain access to Keldagrim.
You'll need at minimum sixty smithing (with the exception of boosts) or alternatively, you can pay $2500 towards The Blast Furnace foreman to smelt bars for 10 minutes. Each hour at the Blast Furnace will use up to 80,000 GP, so be prepared.
In order to lower your entry fee I would suggest acquiring access to the Ring of Charos (a). It is recommended to avoid the pay option when using the Blast Furnace foreman, as it could void the effect of the rings. The ring can be obtained in The Creature of Fenkenstrain questline.
Bringing Ice Gloves and ice to the Blast Furnace will help when you're making use of the bar dispenser since it cools the bar quickly and make them easier to pick up. This can save you time, instead of having to gather buckets of water in order to cool your bars (and it'll free up space in the inventory too).
Before beginning getting to the Blast Furnace It's important to note that it's only available on the planets 352, 355 three, 358, 386, and 387. Once you've spoken the Giant Dwarf before advancing into Keldagrim then you must: Head north and make your way across the bridge. After crossing it
rs 07 gold, continue heading south until notice the Blast Furnace icon on the map. Enter the building marked take a walk down and discover the furnace.