For a lower cost to enter I would suggest acquiring the Ring of Charos (a). However, avoid using the 'pay' option with it. Blast Furnace foreman as OSRS gold it can void the benefits of the ring. The ring can be obtained in The Creature of Fenkenstrain questline.

Bringing Ice Gloves to the Blast Furnace will assist when using the bar dispenser because they will cool the bars quickly enough for you to grab. This will help you save time, instead of having to collect buckets of water in order to cool the bars (and it'll reduce inventory space too!).

Before you start getting to the Blast Furnace itself It's important to note that it's only available across the four worlds 355: 352 3, 358, 386 and 387. After you've spoken with the Giant Dwarf before moving into Keldagrim, you need to head north and make your way over the bridge. After crossing it, continue heading south until notice the Blast Furnace icon on the map. In the marked building, walk downstairs and you'll locate the furnace.

After this is done, it's much easier to travel to the site to visit in the near future. You can use the Grand Exchange shortcut on the northwest wall, take your time in the minecart that runs through Ice Mountain dwarf mines or utilize the minigame group finder for a glimpse outside the building.

It may take some time to get used to, but the minigame for the Blast furnace is very easy. For the furnace to be used you must follow these steps: Then, deposit your ore on conveyor belt. Take a run on the ramp that has been prepared with a bucket full of cheap OSRS GP water or ice gloves. Cooldown your bars and bank them.