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Ultimate Guide to Making a Cheap but Effective Aluminium Forge.
Apparently this is becoming more and more of a thing because I am seeing places where you can buy pure caffeine. I feel like people are so used to having caffeine in an energy drink that it never occurred to me to put it in a muffin. I found this guide not only insightful, but also slightly inspiring. http://www.kaffn8.com/buy-now/
Extracting (almost pure) Caffeine from Caffeine Pills.
I took the top of a fire extuingsjer that I thought would be the perfect crucible. Fire extinguishers are often made from aluminum. They can do this since the pressure is very low, the gas used is safe, and the content is (obviously) non-flammable.Propane is under much more pressure than the extinguisher, and being flammable even explosive has certain legal requirements, one of which I imagine is requiring either very thick aluminum (not economic) or using a stronger metal like steel.
You're absolutely right. A good idea is to find a tank where you can unscrew the nozzle and then purge the remaining gas by first filling it with water.
Thank you so much i have been wanting to melt down some metal and smelt and this helps me alot thank you
Just because you took a hack saw to an "empty" propane bottle and you weren't injured doesn't mean it's safe, or a good idea. I would think very carefully before advising others to try something like that. There will always be propane vapors left in the tank. Every time is a roll of the dice.
I hear using a salt substitute like no salt is a much better one to use. I bought a 2 pound bag of borax i also heard works well. Im going to try on my next batch. I have 10 bags of cans ready to go. Just looking for a day its not 100 degrees to work.
I dont even tap mine. The molten metal doesn't stick. I take the garden hose and spray it over the top until the steam and hissing stops. Then use tongs to pick them out or dump them into a 5 gallon bucket of cool water.
I have used a fire extinguisher cut in half for 20 bags of aluminum cans. Hasnt failed yet. I started with charcol to hear with hair dryer blowing my air. Moved upto a propane torch. I purchased a graphite crucible for copper and am buying a larger one for aluminum. They are on amazon.
I wouldn't be concerned with the moisture on the *outside* of the quickcrete. The *internal* moisture... the moisture that's necessary for any ceramic to cure, and gets trapped in airtight pockets INSIDE the concrete. like... in ALL ceramics... ever ( i think?) not sure that preheating is going to do anything about this...I had just bought a house, and the previous owner had a bunch of 2'x2'x2" pavers laying around. the pretty textured ones that you can buy at walmart, you know?They'd been sitting in the hot sun for a few days, 90 deg+ easy, and felt pretty dry. I use lump coal in my forge, because I think it burns hotter... when lump charcoal gets hot, and you blast too much air at it, it throws out showers and showers of sparks... I call them "Fire Bees" ....because they sting you, and they're made of fire...anyways, I figure I'll just slap this 2'x2'x2" decorative paver on top of the forge, to contain the fire bees... everything was fine for the first few heats of the steel i was hammering, probably just shy of 2000degf. But the paver was getting too hot to handle, taking on and off the forge, even with welding gloves on. So I pulled it off and was walking it over to a spot off in some grass where I could put it down somewhere safe. just as I started to drop/toss it, the face, that was facing away from me exploded. Sounded JUST like my 9mm glock19 going off, Sent pieces of stone the size of quarters bouncing off my house something like 30 ft away... some of them had enough energy to bounce and shower back on me...albeit harmlessly". If this were to happen during an aluminum melt... it'd splash molten aluminum everywhere... google says aluminum melts at 1200degf or so... and that 9/10 doctors agree that 1200degf aluminum is harmful to the average guy's skin...:( I guess that's a long winded story either about how a paver saved me from a ninja armed with a 9mm, or how steam explosions are stupid, dangerous, and unpredictable....and stupid again. Cheers!
YES! same...stupid...problem...solution:1/4" black steel pipe with an end cap. 1-1/2" OD i think? 'bout 4"-4.5" long.my brother-in-law throws boxes in a warehouse, and has on occasion moved empty industrial sized dumpsters 10ish feet across asphalt (we were at the beach and he REALLY wanted that parking space...)his strength is legendary in our circle of friends... I'm a shrimpy dude...he grabbed one end in a pipe wrench, I grabbed the endcap in another pipe wrench, and we pushed in opposite directions, with all our might...i got pushed around the room... it has never leaked, has never split, broken, or warped...has processed probably about a hundred melts over 3 years of abuse... it's got some nasty scale on the outside, and it sucks to clean... but we can still wrench off the endcap, clean it, and the threads still meet back up when we put it back together. and we've had it glowing dull orange quite a few times!only real downside is that with so much steel, it really sucks a lot of heat... but it also holds a lot of heat when it DOES get hot, which is nice if you need to do a bunch of back-to-back melts.
It's my choice to be compassionate... besides, they'll make such WONDERFUL bait during the zombie apocalypse!
Obviously, safety first - or at least a solid third. It's molten metal after all... A little late to the post. So I've had a very similar foundry made for a while now made of Quickrete surfacing mix and sand in a steel bucket. It's also a solid fuel foundry (charcoal briquettes) with a small electric air mattress pump for air supply. Melting down aluminum is easy enough and for the price of a bag of charcoal, I can melt down 15-20 pounds of aluminum cans. Temp runs between about 1100 and 1900 deg F depending. If I cover the foundry (quickrete/sand cover a couple inches thick with a vent hole in the center) it will soften steel enough to cause a failure. The problem for me has been the crucible. Tried steel milkshake tumblers. Failed about 20 cans in. Tried small empty fire extinguishers cut down to height. Failed after one or two pours. Haven't tried an empty propane bottle yet. I imagine they are about the same thickness as an extinguisher? Can anyone report how long these last for? If these fail, next will be schedule 40 stainless pipe with a welded bottom plate. Be cool if anyone has a lead on something similar...
Thanks for the lead! I've been melting down steel vessels like it's the cool thing to do.
Absolutely right. I have one made of quickrete/sand that's been cured for a couple weeks before use. I also pre-heat it before I fire it up to make sure there's no residual moisture. Safety first - or at least a solid third.
I tried this for the first time yesterday. Followed all the steps with the appropriate ingredients and let the mix dry in 2 Pyrex dishes over night- from 6pm to 7am. This morning instead of been dry crystals it's more like slighty sticky bits of white "caffeine"? Is this normal or does the drying process take longer?I had a lamp over it all night to assist with warmth if that helps.Any help would be appreciated. Thanks
Its their choice to be stupid.
What termperature does that concrete withstand upto? I cant find any info on it.
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