Making a Metal Melting Furnace




Introduction: Making a Metal Melting Furnace

About: a teenager eagerly doing all fun DIY projects that I can do now because now I have TIME, FREEDOM, and couple of bucks when I need them. will appreciate suggestions from experts when they think I need them.

This metal furnace can melt aluminum, copper, gold, silver as well as other metals with a little lower melting point.

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In case you wish to run this furnace on propane/methane:

Step 1: Make a Hole in the Edge of a Steel Bucket

Firstly you'll have to grab a steel bucket (the size depends on how big you want your furnace to be).Drill a hole on the edge of the bucket then using pliers make the hole large enough for an inch thick PVC pipe to pass through.

NOTE: here I used a PVC pipe and later on it turned out to be a mistake as the PVC pipe almost got stuck in the concrete and taking it out was then a it will be better if you use some thing that does not stick to the concrete, such as a steel pipe or something like that.

Step 2: Make Some Insulated Concrete

Take some cement and mix some gravel which should be about 3 times that of the cement also add some perlite or any other insulation as pure concrete explodes when heated.mix the mixture thoroughly and then add water to make the concrete.Also be sure not to add too much water to the concrete as then it will flow out of the hole drilled earlier.

Step 3: Fill the Sides of the Furnace With Concrete.

Place a small dust bin in the center and then introduce the PVC pipe from the hole at an angle(it should be angled because in case the crucible breaks down the metal would stay in the furnace rather than dangerously flowing out on to the floor).Begin filling by first filling the base then scotch taping the pipe to the dustbin and scotch taping the hole with the pipe through.when you have filled the concrete in this sides then let the furnace dry up for at least 48 hours.

Step 4: Making the Lid for the Furnace

Take a bucket and place a circular object in the middle of it.fill the sides with concrete and then pierce two semis-circular handles made of iron into the concrete Besides circular object.handles are not visible over here but you can watch them in my YouTube video.

Step 5: Finishing Up the Furnace

After the lid and the furnace have dried up now need to remove the dustbin, pipe and reclaim the lid out of the bucket.For removing the dustbin free it from the edges by using a chisel(over here I used an iron rod which had an end like a chisel).when the bucket is free from sides simply pull it out by using a plier.for reclaiming the lid over turn the bucket and strike the base of the bucket with your hands or a hammer.pluck out the circular object or strike it out with a hammer.Be careful when using a hammer.Remove the pipe by piercing the end with a hot screw driver then turning it and pulling it out.hammer the pipe in as then it will be easy to pull it out.

Step 6: FIRE Up the Furnace.



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    15 Discussions

    You have one great explosion comimg . Be sure to wear eye protection .Should have perlite or other insulation material mixed in there . Plain concrete explodes when heated

    6 replies

    I didn't know that.will explosion be very high or it will be just chips of concrete blowing off.Thanks for your timely comment

    you save me.

    Concrete explodes violently away from the surface so it would be unpredictable on your structure but it will happen . Put a blowtorch on the surface of a concrete slab and keep back

    if it explodes on the surface then it will remain with in the furnace, I the way I'll be adding insulation material next time.

    Yes it explodes out from the surface on flat concrete which is colder underneath. In your usage the whole thing will heat up and results will surely be different . Just keep glasses on until it happens then rebuild with insulation in the mix and I use plaster of paris instead of cement and get excellent results from it

    in case it explodes on the surface then the chips will stay in the furnace, I the way I'll be adding insulation material next time.Thanks for your suggestion and please follow my Instructables account I'll be needing your assistance later on as well.

    oh, really.I didn't know that. thanks will wear eye protection from now onward.thanks for your suggestion.

    It's a good thing you're wearing safety sandals by the burning thing on the second pic.

    Nice tutorial, but this looks very similar to the one built by The King of Random. If that is where you got the idea, you might want to consider giving credit by posting a link to his video in your introduction.

    3 replies

    yeah i did get ideas from the king of random

    will i have to take permission for using his ideas or just crediting by link is enough

    I'm pretty sure you don't need his permission, but its always good to give credit where credit is due. Just a link in the introduction should be fine.

    Thanks, please follow my Instructables account I'll need your help later on as well.

    where needed please feel free to guide me.

    what type of refractory did you use? has it held up for multiple uses?

    1 reply

    it's simple concrete and has not cracked yet. I have used it about 5 times .

    King of random made this to