First furnace build

Hi all,

This is a log of the progress of my furnace build. I am sure I will have questions along the way...

Hot-face form.

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Hot-face poured.





Trouble with the tuyere, solved with the application of some refractory sieved to remove the big lumps.



Lid form.





Tuyere fixed up.

 

That is a nice furnace shell.
I have found that refractory is very patchable.

I sometimes use ITC200, or just some additional refractory if I have any on hand.
For lower temperature work, some of the hardware store furnace cement works ok.

Looks like it is coming together well.

 

Sweet.... Save yourself some refractory cement so you can pour a few plinths. A cool whip container is about the perfect size for most. Provides a nice wide platform for your crucible. Fill to the desired height to keep the flame off the crucible. I pour them solid.

 

Thanks for the feedback guys, it's all coming together nicely

 

I like the height of that tuyere off the floor. This way if you end up with a busted crucible, it cant drain into your burner. That would suck.

 

Jason, Yea it means I have to make some thick plinths for the crucible to sit on but for me it's a good compromise.

 

Question, is it a good idea to cook the refractory shell before or after adding Kaowool and ceramic fiber?
It has been sitting now longer than 1 month and I am due to receive the kaowool early next week.
Burner ready to burn

 

IMO, You don't want to heat cure any of the refractory setup (entire furnace refractories) until everything is assembled.
Make sure you treat that CFB with some rigidizer to stabilize the particles and keep them from becoming air born during operation.

 

This design looks familiar!
I am sure you will be pleased. I would not change anything if I did it again.

 

Thanks OCD, so if I apply the rigidizer and get some on the refractory, no adverse effects?

 

If you are following my design no rigidiser is needed as all the ceramic blanket is enclosed.

 

Thanks myfordboy, the kaowool will be fully enclosed so no need to treat it.

The burnout furnace I am building will need rigidizer it as the kaowoll is exposed.

Thanks Jeff.

 

Correct, any CFB that will be exposed needs to be ridigizer.

Your also correct Jeff about the application of ITC100.
The under laying refractories need to be cured before applying, although some of the forge guys just mop it onto CFB curing it out that way.

I coated my keg furnace with the IRC100 after initial firing/curing and to this day that stuff STINKS TO HIGH HELL!!!

Next furnace I every build, or rebuild will not have the ITC coating applied to the furnace walls.

 

I was just too cheap to spring for ITC. Straight Mizzou for this cheap guy that plays cool music in videos of fire and hot metal....

 

Surrre Jason, whatever makes you feel better.

We all KNOW who controls the bank account at your house,

and it ain't YOU.

 

Well at least he controls the :

 

Hey! I'm surprised David hasn't worn it smooth yet! lmao.