Results 1 to 5 of 5
  1. #1
    alloy2 is offline Metal Recycling Entrepreneur
    alloy2 started this thread.
    SMF Badges of Honor



    Member since
    Apr 2015
    Posts
    1,435
    Thanks
    522
    Thanked 2,126 Times in 883 Posts

    Induction Furnace Copper Melt

    The copper slug on the left hand side was made up from thin copper wire balled and compressed before melting, the slug on the right came from copper waste sludge from my refining stock pot a swipe with nitric acid shows that there are some precious metals present.



    The slug on the right will be remelted into an anode for parting in a cell.

    My only regret is not buying the induction furnace sooner, no more propane bottle freezing or running out of fuel at a crucial moment.

    Last edited by alloy2; 04-22-2015 at 03:22 PM.

  2. The Following 3 Users say Thank You for This Post by alloy2:



  3. #2
    alloy2 is offline Metal Recycling Entrepreneur
    alloy2 started this thread.
    SMF Badges of Honor



    Member since
    Apr 2015
    Posts
    1,435
    Thanks
    522
    Thanked 2,126 Times in 883 Posts
    Slug on the right weighs 4.20 lbs, made from small diameter copper wire salvaged from fractional horse power electric motors.

    A quick dip in a very dilute sulphuric acid would remove the oxides giving you a much cleaner looking slug, with copper sulphate as a by product. Any decent scrap yard that owns an XRF will gladly accept this as number one copper.

    For those of you that sell copper bullion on ebay these copper slugs pack into a box really nice and compact. For every pair of slugs facing up another fits into the inverted space filling the gap.

    Last edited by alloy2; 04-22-2015 at 04:14 PM.

  4. #3
    alloy2 is offline Metal Recycling Entrepreneur
    alloy2 started this thread.
    SMF Badges of Honor



    Member since
    Apr 2015
    Posts
    1,435
    Thanks
    522
    Thanked 2,126 Times in 883 Posts
    Last melt all my fine hair type copper has now been melted to what you see in the picture below.

    Slug on the right weighs 5.50 Lbs., had I heated the mould before pouring I would have had a much nicer looking copper button. Also the black coating could be carbon from the oil I pre coat the mould with prior to pouring.

    I'm using a large 35 lb slag mould to pour into.

    A 6 lb copper melt in a 15 KVA furnace would be its upper limit and not a gram more.

    Last edited by alloy2; 04-22-2015 at 05:59 PM.

  5. #4
    glumpy's Avatar
    SMF Badges of Honor

    Member since
    Dec 2014
    Location
    Sydney Australia
    Posts
    45
    Thanks
    1
    Thanked 124 Times in 31 Posts
    It doesn't seem like too many people use furnaces for separation of consolidating their scrap. I have been using waste oil burners and simple furnaces to take the ally off steel and it works well. I have also done copper and am looking to build a brick furnace so I can melt things like alternators and starters etc so I can get the copper out of those. Oil heat and power make it pretty easy and of course it's a free fuel that can be put to good use and people are happy to be disposed of in a responsible manner.
    You can see some of my burner setups and melts here: https://www.youtube.com/user/glumpy10/videos

    I see a lot of the doomsdayers save pennies for the copper, they would probably ship themselves if they saw all that copper in one place. Maybe you could get more for it selling it to the gloom and doomers than the scrap yard?

  6. The Following User Says Thank You to glumpy for This Post:


  7. #5
    alloy2 is offline Metal Recycling Entrepreneur
    alloy2 started this thread.
    SMF Badges of Honor



    Member since
    Apr 2015
    Posts
    1,435
    Thanks
    522
    Thanked 2,126 Times in 883 Posts
    Quote Originally Posted by glumpy View Post
    It doesn't seem like too many people use furnaces for separation of consolidating their scrap. I have been using waste oil burners and simple furnaces to take the ally off steel and it works well. I have also done copper and am looking to build a brick furnace so I can melt things like alternators and starters etc so I can get the copper out of those. Oil heat and power make it pretty easy and of course it's a free fuel that can be put to good use and people are happy to be disposed of in a responsible manner.
    You can see some of my burner setups and melts here: https://www.youtube.com/user/glumpy10/videos

    I see a lot of the doomsdayers save pennies for the copper, they would probably ship themselves if they saw all that copper in one place. Maybe you could get more for it selling it to the gloom and doomers than the scrap yard?
    Sweating the aluminium from alternators you may find some of your copper is going into the aluminium melt.

    Aluminium has a lower melting temperature, once molten acts as a solvent lowering the melt temperature of the copper.

    To give some examples, lead foil is used in a fire assay, it's purpose is to lower the melt temperature of the surrounding metals allowing the metals being assayed to be collected into the melted lead leaving a bead of precious metals behind once the lead has been absorbed into the bone ash cupel.

    Copper or silver have both been used in smelting as collectors of metals having a much higher melting temperature, again when copper or silver is in the molten state these metals have become solvents. Certain flux's also help to lower the melting temperature while other types of flux's added to the smelt charge will take up unwanted metals as oxides.


  8. Similar threads on the Scrap Metal Forum

    1. California | Items Wanted - Looking for two pieces of equopemt, propane melt furnace and an atomizer.
      By NobleMetalWorks in forum Scrappers Classifieds
      Replies: 5
      Last Post: 04-22-2015, 11:22 AM
    2. Replies: 17
      Last Post: 01-01-2015, 07:27 PM
    3. Lets close this deal! Induction motor stator
      By jiffy117 in forum A Day in the Life of a Scrapper
      Replies: 2
      Last Post: 03-07-2014, 03:03 PM
    4. The Melt
      By Copper Head in forum Metal Casting
      Replies: 6
      Last Post: 01-06-2014, 07:52 PM
    5. Texas heat melt down
      By easyrecycle in forum A Day in the Life of a Scrapper
      Replies: 15
      Last Post: 08-11-2011, 09:30 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

 
Browse the Most Recent Threads
On SMF In THIS CATEGORY.





OR

Bookmarks

Posting Permissions

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

The Scrap Metal Forum

    The Scrap Metal Forum is the #1 scrap metal recycling community in the world. Here we talk about the scrap metal business, making money, where we connect with other scrappers, scrap yards and more.

SMF on Facebook and Twitter

Twitter Facebook