For a lower cost to enter I would suggest acquiring access to the Ring of Charos (a). Avoid using the option of RS gold paying with it. Blast Furnace foreman, as it will negate the value of the rings. The ring can be obtained in The Creature of Fenkenstrain questline.

Bringing Ice Gloves to the Blast Furnace will help when you're using the bar dispenser, since it cools the bars in a short time for you to use. This will help you save time, instead of getting buckets of water repeatedly to cool your bars (and it'll reduce inventory space too).

Before you get started on your journey to the Blast Furnace, it is worth noting that it's only available in the following worlds: 352 3, 355, 358 355, 386 and 387. Once you've completed the Giant Dwarf and proceeded into Keldagrim You must: Head north and make your way across the bridge. Once you've crossed , keep going south until you notice that Blast Furnace icon on the map. Inside the designated building, walk downstairs and you'll find the furnace itself.

Once you've done this the first time, it will be much easier to visit the area to visit in the near future. You can use this Grand Exchange shortcut on the northwest wall, take to the minecart and buy rs 3 gold explore Ice Mountain dwarven mines or play the minigame group searcher to make an appearance outside the building.