Jump to content
I Forge Iron

Tuyere shape question


Recommended Posts

Attached is a photo of one of the 4 tuyeres on the old school forge I am bringing back to life.  It's a little tough to see but the openings are roughly cone shaped as the refractory has degraded and about 2" in from the face, the refractory is cast around the steel gas lines--looks to be 3/4" pipe.

This is an air fed forge--propane is fed into the blower impellor and then to a distribution header with 4 pipes leading to the tuyeres.  3 have shut-offs so that you can choose 1, 2,3 or 4 burners being lit.

The problem is, I am not sure what the actual shape of the refractory portion of the tuyeres was to begin with--or if it really matters.  Should they be slightly conical to allow some spread?  cylindrical?  If cylindrical, then same diameter as fuel feed pipe or slightly larger?  Cast in some sort of modified mini ribbon burner?

Since you only get one shot at re-casting the refractory (or start again from scratch) I thought it better to ask for opinions rather than just guess.

Oh...those degraded top bricks are 1-1/4 thick for a size reference.



Link to comment
Share on other sites

What's the make of the forge? I have an old Johnson Appliance 122A forge out back. It's a gun feeding for nozzles in the chamber. The burner nozzles are rectangular on the flat. I've never converted it to propane let alone lit it, these forges are more inline for a production shop, not a hobbyist. They are serious gas hogs so a person better have enough production to justify one.

Burner nozzle shape is less important with a gun (blown) burner.

If you know the maker you can probably get the specs from the company, Johnson keeps it's manuals, parts lists and parts available online.

Frosty The Lucky.

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...