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[Iamblichos]

So, I have tons of coke, pig iron, iron and flux... and when I try to make steel in my magma forge, it says "needs fuel"?  Help?

[Linkxsc]

To make steel it takes 1 pig iron, 1 iron bar, 1 flux, and 1 unit of fuel (charcoal or coke)
This is because you need the added carbon form the charcoal to get the steel. If you were using a regular smelter, you'd actually need 2 fuels, 1 to add to the mix, and 1 to smelt it all.

Wow totally not paying attention in hindsight. Yeah do you have any burrows set up keeping your forge dorfs from getting to the coke? Is there a drawbridge closed somewhere, or a locked door.
Or do you actually have "coke" or "charcoal", simply having bituminous coal won't do it, you need to turn it into the coke first.

[neblime]

if it's actually a Magma forge, and not a metalsmith's forge, all it needs is 4/7 (or more) magma below the center tile of the forge.
If it's a metalsmith's forge yes check burrows and such, and that the coke isn't behind a locked door or there is no stair access or something

[FrankMcFuzz]

So, I have tons of coke, pig iron, iron and flux... and when I try to make steel in my magma forge, it says "needs fuel"?  Help?

if it's actually a Magma forge, and not a metalsmith's forge, all it needs is 4/7 (or more) magma below the center tile of the forge.
If it's a metalsmith's forge yes check burrows and such, and that the coke isn't behind a locked door or there is no stair access or something

It's not the center tile. It's any of the 9 tiles. If the impassable tiles are over the channel, the forge works as normal, and magma crabs cannot shoot/pass through them, for all you volcano users.

Spoiler (click to show/hide)

(Also, you can't make steel in a magma forge, the forge is for items, the smelters are for bars. I hate to be THAT GUY)

[Blue_Dwarf]

(Also, you can't make steel in a magma forge, the forge is for items, the smelters are for bars. I hate to be THAT GUY)

Urist McThatguy interrupts posting: too helpful.

[CaptainArchmage]

So, I have tons of coke, pig iron, iron and flux... and when I try to make steel in my magma forge, it says "needs fuel"?  Help?

If you have a magma smelter there are a few bugs that can happen. Also, you can have the coke other materials to run the reaction, but you can have trouble if the coke is in a single bin that is being hauled around or is targeted for hauling, or it is forbidden, or if the smelter is set to take from a specific stockpile rather from anywhere.

If you check the above conditions and there are no problems, try to move the coke to the same level as the smelter. I’ve heard it gets around some bugs.

[Iamblichos]

I figured out what the problem was... my construction team had pre-ordered all of the marble and so even though it was in the stockpile, it wasn't available as flux.  All that stone was being held so that Urist McMason could build a really pretty second level on the fort.    thanks for the help, sorry for the (eventually) unnecessary post.

[Linkxsc]

No post is unnecessary as long as knowledge is gained.
For example. You should consider taking down some of those marble walls and instead making them from marble blocks. 1 stone equals 4 blocks. Ofcorse that means you cant tear buildings later and use them as flux. But youll have more flux for steel in the meantime.