Merry Christmas !
It's good that you don't go out of your way. Much more efficient.
You have to think about your time though. That has value. Scrapping is a trade. It's like any other trade. It takes awhile to learn the ropes. Most of it is trial & error to see what works best for you. I'll try to give you a couple of examples.
1: To strip wire or not to strip wire ?
Some of the scrap yards have this machine called a wire granulator. It can literally strip tons of finely stranded automotive wire per hour. You could compare that to what you can do in your workshop. Maybe you can recover half a kilo of copper per hour on a good day ?
That's an awful lot of work for very little gain. Maybe it works out better for you to sell the unstripped automotive wire to the yard and let them deal with stripping it ? Let the machine do the tedious & time consuming work ?
2: To break down a refrigeration compressor -or- sell it whole as a sealed unit ?
It's not a bad thing to break down a few to see what's involved. It's kind of a nasty job with everything being covered in oil and all. There are environmental concerns as well. A fridge has
Freon in it. The Freon needs to be properly removed by a professional before cutting the lines to to the compressor. Then there's all that oil. That's an environmental concern. It needs to be properly disposed of.
The environmental laws are pretty strict here in Maine. For me: The fridge compressors are far more trouble than they are worth.
That's the thing though ... it's different for every scrapper. The laws are probably different in the UK. The things that don't work for me might work really well for you.
It's all trial & error.
I would be careful with the microwaves though. There are a couple of things to watch out for. Any large capacitors can store an electrical charge that could hurt or kill you. Those need to be discharged if they are present. The magnetrons tend to have beryllium ceramics in them. The beryllium is okay if it's unbroken. It's really bad dust to breathe in if the ceramic is cracked or broken. The transformers these days are more aluminum wound than copper wound. Microwaves can be a disappointment as a source of copper because they are so cheaply made these days. It varies ... ya know ?
Hands on experience is the best teacher. Also ...read as much as you can here. It's all been covered before.
Best of luck in your new endeavor !
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