Thanks for your reply.
I use a Becket burner converted to waste oil for my boiler that heats the shop and greenhouse.
You're right about the flame retention head mixing the fuel air mixture in a regular furnace/boiler though. I haven't thought about the mixing in a foundry furnace but i see...
I really like what you've done here.
For the burner head, I see you have the ends slit and twisted somewhat to create a flame retention head. Is there a blower you use or just the compressed air?
I can't seem to figure out how the lead screw attaches to the gear. There are holes in the drive gear but only a keyway in the lead screw. No keyway in the drive gear.
I built a hot water boiler using pipes in front of the flame source. With this I heat my shop and greenhouse.
What are your intentions with this project?