I allways clean the burnt wire off afterwards.
I burn it off, when its cold I put it in a big tray made from a big drum cut in 1/2 (actually its a old Ali tray I found.. same size)
Then I cut off all of the still plastic coated wire (you never get all of it burnt off) & all of the brass clips that I didn't get before burning.
Then I put some washing powder or dishwash liquid in (not much needed) & fill it 1/2 way with water & swish it around so the black Copper oxide falls off.
This is handy too, it removes the acid or whatever that is so bloody stingy (sore-stings) to cuts in your hands..
I lift it outta the tray & drip dry it a bit. I empty the water & the trays crap into a bucket.
Then I dump the wire back in & wash it with water again, then chuck it into a old 40Kg coal sack.
I know that adding some Hydrochloric acid to the second wash will brighten it up a LOT. Sodium hydroxide (Caustic soda) does the same job. It also removes a little more of its weight.
If you leave it for a short time it changes colour a bit (ie blue/green after a HCL wash or powdery yellow)
That makes them wonder what you have been up too & if you are trying to rip dem off.... Explain it to them, they will understand what you are doing, its kosher (for want of a better word)
60 Kg of Plastic coated wire (one layer of plastic) will burn down to 40Kg of burnt off & cleaned copper wire. ie 2/3rds of preburnt weight.
I rip out cars wiring looms to get this Copper wire, a long hard dirty dangerous work.
First I rip out the looms, then cut off all the plugs & unstrip off all of the plastic tape & sleeves & cut out all of the brass wire connectors, bag it up, burn it off. clean it up, take it to the scrappers.
Most of the stuff thats removed is either plastic ash & acids & Copper Oxides.
The Copper oxides can be reclaimed by electroplating it back out of a acid solution onto a copper cathode(?)
I have about 30Kg of that oxide stuff & intend to do it one day once I have figured out the acid solution.
I did it on a small scale using a solar panel from a garden light decoration thing.
Next step is to work out what the solution is & make a wind powered generator to do the electroplating.
Bookmarks