Jump to content
I Forge Iron

Iron Sulfate?

Recommended Posts

I was wondering if iron sulfate would be suitable to smelt, I've looked around my area and it's the only kind of iron ore I can get my hands on. Will the sulfer impact the smelting process at all?


I believe it's pretty rich in iron, but I'm not a geologist. Can anyone here chime in?

Link to comment
Share on other sites

Sulfur is considered one of the worst contaminants you can have in iron and it's the main reason all modern alloys pretty much have Mn added to them.


Traditionally sulfur containing ores were roasted to drive off the sulfur and change them to oxide ores and then that was smelted.  The roasting process will endear you to any neighbors who will be glad to come over and help and even bring their own pitchforks, torches, brushwood and a nice stake  for you.

Link to comment
Share on other sites

Iron ores that contain sulphur have to be combined with manganese in the blast furnace or the hot iron becomes "hot short".


The WIkipedia entry on iron ore has a section on the significance of sulfur in ores and the coals used in blast furnaces - it's right at the bottom of the article. It also has some references to blacksmithing.

Link to comment
Share on other sites

If you have a small blast furnace (a cupola I suppose) you could melt down the iron with some magnesium. The magnesium will bond with the sulfur to form magnesium sulfide. The reaction will result in a lot of heat (it'll bring the iron past 3000°F) so you want to have your furnace lined with good refractory. The magnesium sulfide will be slag and you'll want to remove it.

If you want to remove any silicon and phosphor you can add crushed limestone and iron oxide.

If you're using a regular foundry I guess you can charge the crucible with the iron, magnesium, limestone, and iron oxide. Make sure you use a good crucible because the magnesium-sulfur reaction could melt right through a crucible not made for those kind of temperatures.


I've never actually melted iron or tried any of this out. This is all based on reading.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...