Introduction
When you have mined different ores, you need to smelt them. When you have smelted them into bars, you will be able to forge them into another item, usually a weapon or piece of armour. To smelt something, you need to use a secondary ore with it, normally coal. Silver and gold are exceptions; they are used in crafting. The iron ores are also special: They only have 50% chance of conversion, as they are in 50% considered as impure.
To smelt, you have to use the ore with the furnace, or click on the furnace and select which ore you want to smelt.
Smelting
Furnaces
Locations of Furances:
• Al Kharid(Closest for Free Worlders)
• Falador
• Lumbridge
• Level 28 Wilderness
• East Ardougne 
• Lost City 
• Shilo Village (you must pay 20gp in order to access) 
• Neitiznot 
• Edgeville (Must have completed Easy Varrock Diaries) 
• TzHaar 
• Port Phasmatys 
• Keldagrim 
• Lost City (Zanaris) 
• Entrana 
• Piscatoris 
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Ores
To smelt an ore, simply go to a furnace (see locations above), and use the ore on the furnace (not coal). Also, the Magic spell "Superheat Item" can be used on the ore to smelt it.
NOTE: If you want to smelt the whole inventory of ore into bars, you can click on the furnace, then right-click on the ore you wish to smelt, and select smelt x, then enter how many you want to smelt. This is very effective as you don't have do click all the time.
Forging
General
Once you have the bars, you can forge them into different items: Weapons, pieces of armour, throwing knives and so on.
To forge, you need the bars and a hammer. Then, use the bar on an anvil. You can buy hammers in general stores for 1gp.
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Hammer |
Anvil |
When you use the bar with an anvil, a menu appears.
If you don't have enough bars to make a specific object, the bar numbers will be in red. Otherwise, it's green. If your required level is not high enough to make a specific object, the name will be in black; otherwise, it's white. When you click on a black item, it tells you the required smithing level.
A lot of people is training smithing and mining, because you can make good profit out of it, you can sell the items to shops or other players, or use low and high alchemy spells on the items to convert it into money.