Using this technique you could probably still get away with burning copper wire to remove the insulation and get oil from the process to use as heating fuel maybe even turn it into diesel.

Pyrolysis https://en.wikipedia.org/wiki/Pyrolysis



Pyrolysis is the thermal decomposition of materials at elevated temperatures in an inert atmosphere.[1] It involves the change of chemical composition and is irreversible. The word is coined from the Greek-derived elements pyro "fire" and lysis "separating".
Pyrolysis is most commonly used to the treatment of organicmaterials. It is one of the processes involved in charringwood, starting at 200–300 °C (390–570 °F).[2] In general, pyrolysis of organic substances produces volatile products and leaves a solid residue enriched in carbon, char. Extreme pyrolysis, which leaves mostly carbon as the residue, is called carbonization.
The process is used heavily in the chemical industry, for example, to produce ethylene, many forms of carbon, and other chemicals from petroleum, coal, and even wood, to produce coke from coal. Aspirational applications of pyrolysis would convert biomass into syngas and biochar, waste plastics back into usable oil, or waste into safely disposable substances