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Thread: Clearing Up

  1. #16
    P38
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    Quote Originally Posted by 223nut View Post
    @P38 keep us posted on the furnace project with pics.
    @223nut

    Making one like this out of an old LPG cylinder, including making my own cast able refractory.

    https://youtu.be/gFOq88iQg60

    Also making an LPG burner to power it.

    Cheers
    Pete
    gadgetman likes this.
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  2. #17
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    Quote Originally Posted by P38 View Post
    @gadgetman

    Melting metals and creating alloys is a fascinating process.

    Just watch the lead fumes coming off your pot, they're not good to breath.

    To help clean up your lead you can use a flux in your melt.

    Flux will help purge the melt of impurities and float them to the top as dross.

    Chuck a whole tea light candle (removed from the aluminium casing) into you molten lead and give it a stir

    It will catch fire initially, once burned out give the molten lead another stir and remove the dross.

    I'm currently making a small furnace that will be capable of melting aluminium and bronze for casting.

    Cheers
    Pete
    Will try the candle thing next time.

    A crucible furnace is on my to do list. Planning on using a couple of old LPG cylinders. I need to find some refractory.
    P38 likes this.
    There are only three types of people in this world. Those that can count, and those that can't!

  3. #18
    P38
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    @gadgetman

    I can share the cast able refractory recipe I intend to use if you like

    Might start a new thread.

    Cheers
    Pete
    Beaker and Tommy like this.
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  4. #19
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    Quote Originally Posted by P38 View Post
    @gadgetman

    I can share the cast able refractory recipe I intend to use if you like

    Might start a new thread.

    Cheers
    Pete
    Yes please. I have the cylinders cut ready to go.
    There are only three types of people in this world. Those that can count, and those that can't!

  5. #20
    Almost literate. veitnamcam's Avatar
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    You boys looked at using an arc furnace? you both have welders I think?
    Rule 3: Load a firearm only when ready to fire

    Chicken Intolerant.

  6. #21
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    Quote Originally Posted by veitnamcam View Post
    You boys looked at using an arc furnace? you both have welders I think?
    Yeah but I can see this just an excuse for a new toy area
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  7. #22
    P38
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    Castable refractory I'm going to use, but will add Sodium Silicate , Water Glass, and Silica Sand to bind it all together and give it a hard surface.

    Homemade furnace refractories

    Water Glass
    https://youtu.be/n_Kxm-w_XkI

    Some tips on sourcing materials.
    Pearlite, Garden Centres or landscapers
    Bentinite Clay, Well Drillers, called well drillers mud.
    Silica Sand is proving hard to get, those that have it want to sell me a ton.
    Portland cement, any hardware store.


    Water Glass
    Sodium Hydroxide, Caustic Soda, Mitre10
    Silica, Cat Litter, any pet store, read the contents as it must be pure silica

    Cheers
    Pete
    Arguing with an Engineer is like Wrestling a Pig in Mud.

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  8. #23
    Member gadgetman's Avatar
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    I've been looking at that sight for a few years. Can get hold of refractory that is good for cast iron casting.

    Very tempted to knock up a waste oil burner since I generate so much of it with vehicles.
    There are only three types of people in this world. Those that can count, and those that can't!

  9. #24
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    A bit of google-foo seems to indicate a lot of placemakers stores sell silica sand.
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  10. #25
    P38
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    Quote Originally Posted by gadgetman View Post
    A bit of google-foo seems to indicate a lot of placemakers stores sell silica sand.
    Awesome.

    I'll give them a try.

    Silica sand is the last ingredient I need.

    Cheers
    Pete
    Marty Henry likes this.
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  11. #26
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    gadge if you want a bit more waste oil for that fuel -call round home and tell my ryan to hand it over!!

  12. #27
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    Make sure you dont get water in the molten lead. It's spectacular... Painful too.

  13. #28
    P38
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    Quote Originally Posted by Mauser308 View Post
    Make sure you dont get water in the molten lead. It's spectacular... Painful too.
    Your no wrong.

    Or any molten metal for that matter

    Cheers
    Pete
    Arguing with an Engineer is like Wrestling a Pig in Mud.

    After awhile you realise the Pig loves it.

  14. #29
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    Quote Originally Posted by P38 View Post
    Awesome.

    I'll give them a try.

    Silica sand is the last ingredient I need.

    Cheers
    Pete
    I'd head to the gardening/landscaping section.
    There are only three types of people in this world. Those that can count, and those that can't!

 

 

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