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Making a DIY smelting furnace

Discussion in 'Hobby Engineering' started by Bullus, Mar 3, 2016.

  1. Bullus

    Bullus Member

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    hey guys so got a crazy idea for a computer build and I need more tools to do it, so first thing I am making is a smelting furnace from a 55 gallon drum. Food grade so no need to worry about cutting, and only fumes it will give off is if the paint cooks off, and with my intended design with double layer 5cm isowool and refractory cement not sure the outside will heat up that much.

    anways here is a teaser while I finish my design and work on parts before I put it together

    [​IMG]



    (figure this is the right sub-forum for this )
     
  2. 2xCPU

    2xCPU Member

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    Arrg - there is only one place in the world where that's a 55 gallon drum (and this isn't it).
    To the rest of the world it's a 44 gallon drum unless you happen to live somewhere metric where convention converts it to a 205l drum.

    I'll watch the build with interest - good luck.

    2.
     
  3. kombiman

    kombiman Dis-Member

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    Intense fire! I'm in and really keen to see how you cast :thumbup:
     
  4. oculi

    oculi Member

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    whadderyasmeltin?
     
  5. 1shot1kill

    1shot1kill Member

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    It's a 44 gallon drum.
     
  6. disco frank

    disco frank Member

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    thats a BIG furnace!!!!


    the king of DIY had a nice small one on his channel that worked pretty good
     
  7. Lupuscrux

    Lupuscrux Member

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    it could be a 55kg drum use to have them at work.

    Good luck with the build, I've been tempted to make one myself but from a old gas bottle.
     
  8. psychobunny

    psychobunny Member

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    keen to see how this goes :thumbup:
     
  9. miicah

    miicah Member

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    This is a ridiculously large furnace.
     
  10. mesaoz

    mesaoz Member

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    Planning to smelt car doors and neighbourhood children.
     
  11. OP
    OP
    Bullus

    Bullus Member

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    probably going to make a different furnace for more practical melting of metal, but this furnace is so large so I can bake moulds for full mono block cooling solution for an XL-ATX mobo with 2 gtx x80 graphics cards for PLA lost wax style casting, the chamber of the furnace will be like a pill shape. (also yes it is a 205L or 44 gallon drum , my bad sorry)

    here is a mock up of the size my moulds will be

    [​IMG]

    [​IMG]
     
    Last edited: Mar 6, 2016
  12. BigDave

    BigDave Member

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  13. oculi

    oculi Member

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    So you actually aren't smelting at all, correct terms aside this is pretty cool, and big. What are you going to fuel it with?
     
  14. OP
    OP
    Bullus

    Bullus Member

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    did my concrete base last night, going to be a little while til I can get this fully going as total fire bans in Victoria most of this week


    [​IMG]

    layer of refractory cement

    [​IMG]

    dodgy mould for base support

    [​IMG]

    mould in place

    [​IMG]

    and filled, now to let it set overnight
     
  15. OP
    OP
    Bullus

    Bullus Member

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    so been a busy day

    [​IMG]

    refractory cement set so I removed the mould pic is before I cut off the toilet paper roll and the plastic is a cut up 1.25l bottle

    [​IMG]

    finished cutting out the hole with my dremel for the stainless steel pipe, and cut the 'ribbed' bottom of the stainless steel pipe with tin snips to be able to flare it out

    [​IMG]

    so I have either made a very tall chimney for my 'kiln' or the world's most sturdy Lincoln hat :p

    [​IMG]

    My super efficient drilling table (forgot to take a snap after bolting on the chimney, will pop that in tomorrow)
     
  16. 2xCPU

    2xCPU Member

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    You are from NA - aren't you.

    Still waiting with interest to see what is going to keep this beast warm.

    2.
     
  17. OP
    OP
    Bullus

    Bullus Member

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    ISOWOOL time

    [​IMG]

    setup and tracing my lid to get bottom size, (I am wearing a cheap dust mask and put the gloves on right after this pic, is a bitch popping one off all the time for pics but I love you guys :) )

    [​IMG]

    isowool for bottom of my furnace

    [​IMG]

    putting the torn up base of the cement mould on to line up basic cuts.

    [​IMG]

    now to squeeze it in and hope it fits

    [​IMG]

    was a tight squeeze and I forgot to take a pic, but for 2nd layer of isowool I opted to cut my circle in 4 to make putting it in easier, above is with 3 of the 4 inserted, and the bottom layer intact, I packed the small spaces around my supports with little bits of cut up isowool
     
  18. OP
    OP
    Bullus

    Bullus Member

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    [​IMG]

    last piece inserted and gaps mostly filled

    [​IMG]

    level it

    [​IMG]

    and more refractory cement

    [​IMG]

    then ducked down to supa gas to refill bbq bottle and picked up this small torch, that I will hopefully use as the starting block for my burner, guy there said I should just skip a regulator so here's hoping I don't blow myself up when the burner is a shit load bigger and air forced. (down the road would love a dual fuel burner with lpg start and then swap onto my brother in law's moonshine :p )
     
  19. OP
    OP
    Bullus

    Bullus Member

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    :) nah, Aussie born and bred, was being silly with my 3 1/2 year old niece after I bolted the chimney on and was wearing the thing as a hat :Paranoid:

    will see how my crappy burner goes but plan on doing one of the homemade jet type ones, (and in true computer modder style thinking of using a coolermaster jetflo instead of a blower and 3D printing the mount for it :p )
     
    Last edited: Mar 8, 2016
  20. dillusional

    dillusional Member

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    Great updates so far mate, keep them coming!
     

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