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Too hot for what I need.

plumber_bob's picture

I made this furnace from scratch. Made my own refractory, and all.
But it gets too hot, I melted my cheap little crucible.

But I'm learning!
Here's some YouTube clips:
http://www.youtube.com/watch?v=obJKXDmVrgc
http://www.youtube.com/watch?v=xBnc-KpXQjw
http://www.youtube.com/watch?v=fW49-OGcN2Q
Now for the slide show:

pb


Cool experiment. So what are (post #182516, reply #1 of 25)

Cool experiment.

So what are you trying to make from the recycled Busch's?

To answer both of ya'll's (post #182516, reply #3 of 25)

To answer both of ya'll's questions:

A couple of things are going on here. The first one, is to test the heat resistance of the materials used to make the furnace. Second, is to see how hot I can get it inside. And of course I am planning on casting some stuff, (not sure what yet).

I'd like to end up with a multi purpose furnace, that can heat a shop, or home, and do other stuff like heat water maybe.

If you can melt Aluminum for free then you should get a better price for it at the scrap yard. Plus you can haul way more ingots to the recycle center than you can haul cans.

I plan to build a bigger furnace shortly that will fire on any kind of fuel, mainly wood and waste oil. I hope to build an optional heat exchanger to fit on top of it so you can throw a little wood in the furnace and heat the shop.

This is a mass heater using a rocket stove. What's to keep me from heating that bench from outside with a furnace?

pb


""This is a mass heater using (post #182516, reply #5 of 25)

""This is a mass heater using a rocket stove. What's to keep me from heating that bench from outside with a furnace?""

Nothing at all.
The Koreans, Chinese, Japanese, Romans and several other cultures did it for centuries.

Heck even my kid has built a couple of those units using a simple wood stove box based on the rocket stove and using 3 lb. coffee cans as the flue form then packing tamped earth around it to free form benches, mass walls etc.


Life is Good

Hope this works: (post #182516, reply #6 of 25)

Hope this works:

Man, that's just all Chinese (post #182516, reply #21 of 25)

Man, that's just all Chinese to me...

 

Come on, it's Korean -- (post #182516, reply #24 of 25)

Come on, it's Korean -- everything's spelled just like it sounds :).

That pic is kind of funny because it's from a building materials association (Hwangto is yellow clay, similar to cob I suppose), so everything is labelled as being made from just that. Yellow clay walls, yellow clay floor, and the title is "Traditional Yellow Clay Floor Heater". But it's a good illustration of the idea.

These are interesting devices, but they wouldn't be so useful if Korean houses didn't leak heat like a sieve. They seem to be quite similar to the rocket heater idea.

There's got to be a place (post #182516, reply #25 of 25)

There's got to be a place somewhere in that system to smoke a pig...

 

>>>Plus you can haul way more (post #182516, reply #8 of 25)

>>>Plus you can haul way more ingots to the recycle center than you can haul cans.

Maybe you should host the next Fest at your place. The leftovers oughta get ya a few ingots.

Ya I would like to know too. (post #182516, reply #2 of 25)

Ya I would like to know too. What are you making?

sbsmith49

I answered most of your (post #182516, reply #4 of 25)

I answered most of your question, in my answer to Scott. But to add some more, I'll say that I hope to one day be able to melt and cast steel and iron one day. For right now the only casting I'll be doing is to cast ingots, and fuel rods for my hydrogen reactor. No, it's not a nuclear type, just a small reactor to make Brown's gas, (HHO gas), to see how it works running small engines.

So far I've managed to start and run my generator on only Brown's gas, but I'm not making enough gas to run it totally on the gas, without using any gasoline.

Plus I want to have my very own hydrogen cutting torch.

Any questions yet?

pb


Yeah, my stove/heater is the (post #182516, reply #7 of 25)

Yeah, my stove/heater is the perfect place to practice too..for real, by next year at this time , I'll have a similar deal. The plan book I am looking at is only 75 bucks. And here is the stove combo I want to make.

www.richmondrenovationsandrestoration.com  

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Look up, "Mass heaters" on (post #182516, reply #10 of 25)

Look up, "Mass heaters" on Google. You should find tons of ideas that might used alot less wood.

I'm not knocking your idea, but the wood stove just sends off little bells in my head that says it might use more wood than necessary.

But if you got plenty of access to wood, then it ain't no biggy.
I take it that the oven side has a separate firebox?

Does the back side extend much into the other room?

pb


re"If you can melt Aluminum (post #182516, reply #9 of 25)

re"If you can melt Aluminum for free then you should get a better price for it at the scrap yard"

NOT SO -often, they will only give yout the price of aluminum with mixed iron - they hove no idea what you melted into it, no good for cans as the 'ingots' would need to be chemically analyzed for alloy, etc..

Dont ask how I know

Yo! Junkhound! How are ya? Go (post #182516, reply #11 of 25)

Yo! Junkhound!

How are ya?

Go ahead and tell me how ya know, but I guess it don't surprise me. I know that pawn shops or jewelers don't trust you with precious metals that you cast into ingots. And yes it would be easy to weigh down the ingots, I never thought about that side though.

So, maybe I need to sell the ingots on CL, or Ebay? hummm

pb


The wood stove is for "mild" (post #182516, reply #12 of 25)

The wood stove is for "mild" use and ambiance heating, the BIG box under the oven is the real heater box. It is the contra flow design, the gases / heat are forced around and down thru the base and up around the oven before exiting the flue.

The big cost from what I see online is the doors *can you cast cast iron?*...2 grand for some of them, I know the neoceramic glass is real spendy stuff.

www.richmondrenovationsandrestoration.com  

Sphere, First thought would (post #182516, reply #13 of 25)

Sphere,

First thought would be to cast your own doors and parts, but that is above me, so I won't push that idea.

Next would be to get on local forums and put the word out, or maybe look for creative alternatives. Maybe cutting up a smaller stove for the door, maybe pour a door, out of some homemade refractory or furnace cement. Of course you gotta have DW approval on the cosmetic stuff, (does it look good to her?). hehehe

That's my big problem here. Getting Mrs. Bobs seal of approval, isn't always easy.

pb


Just a thought.... You might (post #182516, reply #14 of 25)

Just a thought....

You might look into a real wood cookstove for that second unit instead of that heater/stove.
Smaller fire for the "take the chill off" days, quick heat response but you can always keep it going all day if need be without too much effort. Worse case scenario for weather etc. you can always cook in/on it.


Life is Good

testing testing (post #182516, reply #16 of 25)

testing testing

hey Duane --plumber Bob --I (post #182516, reply #17 of 25)

hey Duane --plumber Bob --I made it back -what a long strange trip it has been. Well Duane I would cast my doors out of refractory with stainless flatbar for the form sides and mild steel backing for the outside, that way you could use readally available mild steel images welded to the outside of the door for decorations, and since the hinges would be on the outside heavy duty farm gate pivots and posts for the door mounts --heavy as all getout but very servicable and replacable.

Well, if it's been a long, (post #182516, reply #19 of 25)

Well, if it's been a long, strange trip, then you gotta change dealers.
You are what you smoke... ;-)

 

Here we go with a small mini (post #182516, reply #15 of 25)

Here we go with a small mini furnace I made.
This is the components of the mold. A real old coffee can, a plastic cup filled with sand and sealed. Plus my burn tube.

Next I mixed up my insulating cement:

This is 1 1/2 parts Portland, 2 parts perlite, and 2 parts sand.
I packed the mud around everything as best as I could. Here's the finished deal.

And after I let it sit over night, I ended up with this:

Next I spent most of the day slowly warming it up. And by dark I had it going full blast with a propane torch.
http://www.youtube.com/watch?v=1YuXr-Nr6P8
This is a short clip of the furnace going full blast.

pb


Howdy PB, refractory (post #182516, reply #18 of 25)

Howdy PB, refractory companies make an additive --stainless steel needels added to the castable refractory mix, basicly to keep their refractory products from spalling apart under high heat applacations, I know you probley have never seen one but burner pipes in cement kilns are made out of this stuff. Last time I checked the price was about 20.00 for a 100# bag, and since very little water is used a bag goes a long way.

dedubya, Hey, thanks for the (post #182516, reply #22 of 25)

dedubya,

Hey, thanks for the input!

There are a couple of refractory type companies in Louisville, that I plan on checking out anyway, so if the "Project Funds" are available, I will check it out.

Thanks again Dude.

pb


I've made mole' that looks (post #182516, reply #20 of 25)

I've made mole' that looks like that stuff when it's wet.
Put some chili's in it to give it better color... ;-)

 

Tom, Is there anything that (post #182516, reply #23 of 25)

Tom,

Is there anything that don't need peppers to help it out??? :-)

pb