preheating with kerosene heater?

[clperformance]

hello all!!!
This is my first post but I've been lurking for a long time now. I've done a lot of small projects for mostly friends and family(valve covers, exhaust manifolds, etc) but now I'm in the process of doing a larger project, my atv frame, and would like to know if it could preheat it using my shop heater. Its a 155,000 btu heater that can keep my garage a toasty 60 degrees in the dead of winter but I wasnt sure if the fumes coming off of it will increase any material stuck inside the frame.

Thanks for any help and this is really a great site for any info!

[viper56]

clperformance,

If you are speaking of a kerosene convection heater, I cannot see how you would be able to direct the heat onto the part and get it hot enough.
I would suggest getting an infrared heater, either electric or gas, to cure your larger items. These will be able to get your part to temp and fully cure it, since infrared heats objects and not the air like a convection heater.

Jim

[clperformance]

Jim,

Thanks for the reply. I'm not actually trying to use it to cure it. What I would like to do is use it to heat it up enough to get any foreign matter out that might still be inside the metal and clean it with mek before I spray it. I have a 1500w IR lamp that I have been using for curing and will use it to cure the atv frame once sprayed

thanks again

Chris

[viper56]

clperformance,

If you are talking about out-gassing the part, I would use the infrared lamp that you now have. If it were me, these would be the steps that I use.

1. Abrasive blast the frame.

2. Clean and wipe down with acetone or your mek.

3. Outgas the frame using your IR lamp at a temperature higher than the curing temp of the powder that you are using for a period of 20-30 minutes.

4. Let cool to 150-160 degrees, then powder the frame.

5. Cure the frame for the recommended time and temp.

Jim

[chicagorich]

i wouldnt use kerosene

When i went to buy a heater for my garage the sales people told me that kerosene doesnt get a complete burn and that the fumes will leave oil deposits on nearby stuff. I went with clean burning propane.

[RossL]

well,,,,,

since you asked and I haven't noticed this subject before. Our oven is 6(h)x4.5(w)x8(d). The heat source is a diesel/kerosene/jet fuel "torpedo" style heater. We've used this set up for well over a year now with, what I think, are great results. Diesel is what,,,,$1.60/gal. Its takes about one gal per hour to run the oven. Hope this helps.
Ross L

[tinbender722]

Ross,
I am just curious. How do you regulate the heat in your oven with the jet burner?

Leo

[RossL]

I guess we just got lucky. We just run it wide open and control temp by opening/closing a exhaust port(or two). Actually 410 is about as hot as it will get anyway. There is a "deflecter" to keep the heated air from blowing the parts directly(but it doesn't hurt the part if it does). The inside is lined in stainless. Pretty simple and it works!
Ross

[11111111]

i'm callin b.s on this untill we see some picts i build ovens and temp regulation is tuff enough, but the unburnt fuel from diesle on the part is reason enough for this not to work. The next thing is the air volume from the fans. I definetly would like to see some picts. If it works lets all do it.

[tinbender722]

I've got a 4' x 6' x 6' oven built, just need to figure out the heat source and install it. If I could figure a way to regulate the temp. I would go for it. It would be a lot cheaper to operate on propane than electricity.
Leo

[RossL]

call it what you want.. We've been doing it like this for over a year. If fact, I learned about this from a company in College Station(I think thats where they're located) Texas that uses a "BIG" oven and 3-4 heaters as needed. They coat outside furniture. I'll have to look at the BTU rating on ours. We added an extra intake port for another burner, but it doesn't need it. Plus, no problem w/ heat circulation
Ross L

[hvac36]

Shot an image or 2 of the set up !! as I have 2 or 3 of those heaters sitting around.. Each one is 150,000 btu's..

[Blademan]

I guess if it works, it works, I use a mister heater for preheat on my big oven. I gotta go with Jeff a bit on the diesl or kerosene, i would be a bit spooked about the oil contamination...but if it works for you cool.

[RossL]

Our unit is a 115,000 BTU. We spoke w/ someone @ Dupont(sp) before we finished the oven. HIs only concern was possible discoloration of light colors. I have done lots of parts in both our small propane oven and the diesel oven. I can't tell any difference in quaity. I'll find my camera and try to get a few pics tomorrow. Just picture a big insulated iron box w/ one 8" hole in the back and two 8" holes in the sides(low and toward the front). Maybe there would be some "testable" difference in chip resistance or something else,,,, I don't know. But I do know, we powder coat w/ #2 diesel and have had great results. Maybe it will all flake off in another year or two?
Ross L

[11111111]

I would sure like to see the pictures this type of heating would sure make it easy for the newbies to get involved. I have a large oven framwe i jst finished for a buddy i would like to set this up your way for him. heck I think i would like to set up a new ove for myself this way. kick us some specs and picts. thanks jeff