carbon arc furnace

[jpoopdogFTW]

I beleive that at close range, if you put a magnetron from a microwave (still connected to the transformer obviously), right next to the crucibal, you will acheive the same results, though your tempurature will be limited to about 1500-1800, which is hot enough to cast aluminium, zinc, gold, lead and other goodies. its the basis of how instant gold microwaveable furnaces operate.

[Zeeexnox9387]

What Powersource Do You Use??

[ShotsloppyD]

Dude! Cool video, but I hope that paint can is empty! LOL!

I learned something like that watching videos similar to this! Be careful... Hope I see more from ya! Just not the wrong kind! LOL

[benaraby]

hi, thx 4 ur vid but how did u set up the electrical system of the heating element?

thx alot

[williamhad]

where did you did you get the carbon

[gachman]

that's what tony stark did in a cave!....

[TuneMaestro]

That is most excellent. I would like to build an Electric Arc Furnace for the Production of Calcium Carbide (from CaO and C)... but I dont quite know where to start!

[Mike20151]

thanks for replay *_^

[EmperorAst]

Melting point3695 K, 3422 °C, 6192 °F ...

Wow.

[Mike20151]

what are they salt cubes?

[redneckghettotech]

@Mike20151 its made of refractory brick, similar to the kind found in kilns for firing ceramics. unfortunately, this furnace was destroyed after its first run because the inside of it had melted all the way to the outer wall

[benaraby]

@redneckghettotech these ceramics must be well pressed inorder to last more and more

[Procrastinatathor]

Hm, hot?

[starshock01]

melting tungsten? damn thats gotta be sooo hot

[redneckghettotech]

@starshock01 you should take a look at my new furnace. its on MrExTech, my other channel. instead of this one's 1000 watts, the new one is 10kW. the video is titled "carbon arc furnace"

[dionysus2008]

hey i have a 35 amp 60volt transformer think that will make for a good arc? if so would it be better to rectify the ac current or should i just run it as is. im only asking because its very impressive your able to melt tungsten at home.

[TheAlphaMael]

wow lol that's fuckin cool!

[codydean10]

can you use an arc welder with carbon rods for this

[redneckghettotech]

yes, in fact it works very well

[danielgosson]

How long did it take the furnace to heat up to this point?

[redneckghettotech]

it took about half an hour

[jetsam50000]

I kinda wonder how manufacturer's work with liquid tungsten, the difference in melting point with carbob and tungsten is only 200 degrees.

[RODALCO2007]

What type of carbon rods did you use ?

Where that rods from old D - cell batteries?

I have melted iron sand with galvanised nails but need to get hold of carbon rods.

[redneckghettotech]

i used copper clad graphite gouging rods from a welding supply shop, but almost an kind of graphite will work. also having them plated in copper will increase their conductivity, increasing the efficiency of the furnace.

[RODALCO2007]

Thanks for your reply.

I see if I can source some here in Auckland.

[vinee94yo]

You know that the graphite could be heating up due to the electricity, So over time this may cause the crucible to become fragile and very loosely packed.

[genuinecanadianprick]

Too much voltage will produce x-rays. There's really no need to be above 100V. High current is more important. The lower the voltage you can use the better, but striking the arc gets harder to do as the voltage gets lower.

[redneckghettotech]

high voltage will only produce X rays in a vacuum. there is no possibility of x ray radiation being emitted from this kind of arc furnace.

[genuinecanadianprick]

Negative, a vacuum is not required to produce xrays

[genuinecanadianprick]

Although I should add that a vacuum will increase xray yield, a vacuum is not required as the heat of the arc will reduce the gas density enough to allow electrons to reach sufficient speed to create xrays

[lasergeak]

could you use a welder for

this

and where can i get the graphite

nice furnace

[redneckghettotech]

a stick welder would be ideal for this setup, but with some modifications a mig would also work just fine. if i were looking for graphite rods, i would try the inside of some heavy duty D cell batteries.

[kencbk]

nice! how long did it take to melt tungsten?

[redneckghettotech]

this small furnace took about 1/2 hour to melt a few grams.

[laurdy]

will 1volt at 1500Amps work for this?

[redneckghettotech]

it would, but that low of a voltage would require a very low resistance set up, otherwise the resistance of the system might restrict the current

[Sebbass69]

and you're electrodes are graphite, correct? Do they directly touch the tungsten inside the crucible, or is there space between the metal and the electrodes?

[redneckghettotech]

the arc was sustained between the graphite electrodes about half an inch above the tungsten

[Sebbass69]

I have a few questions about how to construct one of these:

Which is more important - high voltage or high amperage?

I have an output that runs at 10,000 - 60,000 volts (increments every 10Kv) - would this work for an arc furnace? It runs at 2 milliamps, so the amperage is very low - would that matter, or would the super high voltage make up for that?

If I need a high amperage, and high voltage, what would be a suitable power supply, that doesn't cost a tremendous amount?

[redneckghettotech]

it is better to have at least 10 amps running through the arc, the high current will make the arc more stable, so there is no need for high voltage.

[RotogenRay]

the temperature reached is proportional to the current.

The distance your electrodes can be apart for an arc to start depends on voltage

[wrz2k6]

how did you do that, the cables are hook to what

[InToonamIsLegacy]

I don't think safety gloves are going to stand up to a 3000º C carbon arc.. :,)lol

[redrake]

it might be hot... careful

[RODALCO2007]

Cool project ! Impressive amount of heat at 40 Volts 35 Ampères. Didn't your hands get hot holding those tweezers with no gloves ?

[pupplesan]

You melted tungsten? THAT is impressive. What is the white refractory?

[redneckghettotech]

im not sure what type of refractory brick it was, all i can tell you is that it was Very light, soft, and it is used in ceramics kilns. also as you can see in thee video, it melted a little on the inside.

check back in a few months, i have made a larger version, that runs at 200+ amps, with 1 inch diameter graphite electrodes. this thing is a beast, it pulls over 2kW, i am still perfecting it, but i will have a vid soon!!!

[kencbk]

Nice! what kind of power supply is needed to make that?

[The777truth]

Nice Smeltin!

[parseerrorr]

I'm working on building an arc furnace and I have some questions: what materials are you using (is the whitish stuff firebrick)? what are you using for the crucible (i'm thinking of getting a graphite one)? how much metal have you melted at one time and about how long does it take to melt it? any info would be appreciated.

[BADAWYY]

Nice idea... Can it actually melt the metal or only brings it to a very high temperature?

[redneckghettotech]

This little furnace could actually melt tungsten to liquid form. However the carbon arc setup that is powering it could reach up to 3550 degrees C which is significantly hotter.

[bombboy1000]

you should try makeing copper cones to make shaped charges.