Results 1 to 7 of 7

Thread: I got a new furnace!

  1. #1

    I got a new furnace!

    I have some very good friends. One of them works as a wood shop teacher and heard about a furnace that was to be discarded in the district. He luckily remembered me.

    Its a Johnson 510 crucible furnace. Interestingly, it has a down draft side exhaust. Twin natural gas burners.

    The interior has seen heavy school use, if you know what I mean. It had about 3" of dross that seems like it turned into alumina against the bottom and walls. I got it out. It came with a #10 crucible, if I am not mistaken on size. Just going by what I saw of another on ebay. The crucible has also seen school use and has a generous coating of aluminum. The pot still seem sound though. I will fire it and clean it out.

    My friend also got me a new crucible that seems like the same size.

    Picture time!











    [img]http://4.bp.blogspot.com/-S4zhQc_Z1Co/UFP-r4rRJ5I/AAAAAAAAAWw/aV1nO9jzi3w/s320/IMG_1325.JPG/img]




    I am not sure what route to go with this thing. I am thinking of using the lower burner port for a waste oil burner. Before I do, does anyone have experience firing with natural gas. Anything I should know?


    Another though that entered my head was the idea of a evaporator burner mounted in the exhaust, but you'd still need to start it somehow.


    Any ideas for anything are welcome.

    Bill
    Use those coffee makers with the spout out the bottom to preheat you oil!

    My foundry: http://www.alloyavenue.com/vb/album.php?albumid=1

    My waste oil burner:http://www.youtube.com/watch?v=NwpKCsiWKls
    Metal casting video:http://www.youtube.com/watch?v=8ui24..._order&list=UL

    My website : maniacmechanics.blogspot.com

  2. #2
    Senior Member metalshop's Avatar
    Join Date
    Oct 2010
    Location
    Charlotte, NC USA
    Posts
    1,042
    Blog Entries
    9
    ThAT IS GREAT bILL!! Oops my caps were locked. Nice score...I am sure you will put it to good use.

    Dave D
    Build the Kwiky all fuel burner: new video: http://youtu.be/E-l21wQ6X-E
    See my projects: http://backyard-foundry.com
    Join the Lost Foam group on alloyavenue: http://www.alloyavenue.com/vb/group.php?groupid=3

  3. #3
    Senior Member
    Join Date
    Dec 2006
    Location
    SE Michigan
    Posts
    592
    Blog Entries
    2
    Great score Bill, you have got some very good friends. I wish some of my cronies would drop something as nice on me. Keep us posted on how it works out.
    learn from the mistakes of others, you'll never live long enough to make them all yourself

    profanity is the futile attempt of a feeble mind to express its self forcibly

    hobiejack

  4. #4
    Senior Member
    Join Date
    Apr 2011
    Location
    Choctaw, Oklahoma
    Posts
    1,518
    talk to BOB S and leave it on either propane or NG if you have it. That furnace is designed and built to burn gas, yea I know your going to say oils free or cheap

  5. #5
    Senior Member Bob S's Avatar
    Join Date
    Dec 2005
    Location
    Saginaw, Mi
    Posts
    1,634
    Quote Originally Posted by dallen View Post
    talk to BOB S and leave it on either propane or NG if you have it. That furnace is designed and built to burn gas, yea I know your going to say oils free or cheap
    Yes, I have this same furnace which was mainly designed for a cast iron pot placed on the top opening for melting low temperature metals like zinc, pewter or lead that were ladled out to the molds. However it also can be used with a crucible for melting aluminum or brass although I have never tried to melt brass in mine and mine will take a #16 crucible. The problem with using it for crucible melting is it's a task to preheat the metal and add it to the crucible and also to keep an eye on the melt, requiring the lid to be swung out of the way each time. To have it work correctly the lid must be in place.

    Sorry for this fuzzy picture.



    Main gas shut off on top and the pilot light shut off on the side and the swing door on the blower to balance the flame.



    The type of pot that was placed on top.





    Flame pattern used with NG.


    This furnace is a back up for me now and use it mainly to preheat my brass crucible when I switch from aluminum to brass which I then place the aluminum crucible in to cool down it. With lid in place the crucible doesn't cool down as fast as in an open vent type unless to cover the vent each time when finished. It's a very simple furnace operate and should be easy to maintain. I think you will complicate the furnace's function by trying to use it with waste oil. Bob
    I used to spend my time to save money but now I'm willing to spend my money to save time.

  6. #6
    Interesting. This furnace did have a crucible with it and was obviously used for aluminum. How long would it take for a crucible of aluminum to melt?

    Also, what sort of pressure does it need to operate?
    Use those coffee makers with the spout out the bottom to preheat you oil!

    My foundry: http://www.alloyavenue.com/vb/album.php?albumid=1

    My waste oil burner:http://www.youtube.com/watch?v=NwpKCsiWKls
    Metal casting video:http://www.youtube.com/watch?v=8ui24..._order&list=UL

    My website : maniacmechanics.blogspot.com

  7. #7
    Senior Member
    Join Date
    Aug 2012
    Location
    N.C. North of Charlotte, United States
    Posts
    213
    Niiiice score. Wish I had some connections like that one!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •