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Sunday, November 14, 2010

Copper in CRTs: A Follow Up



This stash of CRTs was accumulated while scrapping. CRTs are very
easy to get for free, as people are always trying to dispose of them
You may or may not remember, but I previously posted regarding the inside of CRT monitors.

This Saturday I spent all morning breaking apart 20 CRT monitorsdisassembled half of the pile of 40 CRT monitors pictured at right. I spent roughly 15 minutes per monitor...And that was because I was harvesting EVERYTHING. (sometimes it was more if the monitor was bigger and older, sometimes it was less if it was newer and smaller.)  I used a power drill, some big pliers, side cutters, a hammer, a bolt cutter, and a long screw driver (to reach deep screws). 





I make separate piles for
  • Copper breakage (transformers, inductors, and the black box controller thing that I ripped from the circuit board with some big pliers)
  • Aluminum heat sinks/aluminum magnetic shields
  • Stainless steel shields and stainless steel yoke fastener rings
  • Wire
  • Copper Yoke
  • Degaussing coil (check link for info on how to strip)
  • What ever metal is left over (shred pile)
  • ABS plastic shells


I have developed my own technique. Here are some tips for those who want to try this themselves:
  • Use a screw driver or power drill to unfasten the 4 little screws holding down the main case. 
  • Do NOT break the leaded glass when pulling out the yoke! Take the two stainless steel fasteners off with a power drill. If you do that, you can just twist the copper yoke off without breaking the glass. 
  • There is a decent amount of industrial grade wire in each CRT, not to mention the power cord and video cord. 
  • There is a whole circuit boards chalked full of small transformers in there too! Pull those off of the board with some big pliers, seeing as they pay 4 times the price of the printed circuit board. 
  • There is usually a fair number of aluminum heat sinks on the circuit board that many people look over...

    I can understand ignoring some of these metals when you are breaking apart one CRT. But I'm not. 

    After I'm done making all my piles, I take a hammer and break the copper out of all the yokes. (I sweep up the metal left over from the yokes and throw it into the shred pile). I strip all the degaussing coil with a straight razor by hand. Here are my numbers for my 20 monitors I broke open in a just under 5 hours.



    • Copper breakage: 24# @ $.25 per = $6
    • Copper 2: 22# @ $3.00 per = $66
    • High Grade Wire: 13# @ $1.90 per = $24.70
    • Contaminated Aluminum: 19# @ $.40 per = $7.6
    • Non-Magnetic Stainless Steel: 5# @ $.66 per = $3.30

    Brings my total to $107.60



    My total time spent on Saturday was 5.2 hours including travel, bringing my hourly wage for this morning to $20.69 per hour (not including the shred pile, which I left behind). 


    I sell all types of scrap copper, not just scrap breakage and copper 2. Get the overview of Scrap Copper. 

    11 comments:

    1. I save the plastic shell because there is a plastics recycler that buys ABS plastics for 10 cents a pound.

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    2. I really like these types of articles, where you document how to break down stuff and what sort of metals are in them. Hopefully, you'll do more in the future. Also, could you write (or direct me towards) articles about how to identify the various types and grades of metals?

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    3. Of Course!! I actually have my very own page dedicated to identifying different scrap metals right HERE! I hope this helps and if you have any specific questions, please don't hesitate to email me directly, or preferably, keep COMMENTING! Good Luck!

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    4. wow, all the times I see these things on the side of the road or at a yard sale for free and never thought to pick them up. Its the closest thing to a gold mine I'll ever get!

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    5. So, what will you do with the glass? Since I thought that was the part that a lot of dumps didn't want to deal with.

      I've been tempted to try to get some of the copper alloy things at thrift stores (Goodwill, etc.) and see what the yard will give me. Though, the biggest problem I have with the local yard is that don't want to pay out small amounts...

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    6. What do you do with the leaded glass, how can I dispose of it properly and is there a easy way that you dispose of it?

      I am thinking about collecting till I have a few than one day tear them apart so similar to what you did.

      thanks in advance

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    7. Disposing of the glass is the hard part. I throw mine in the dumpster behind my shop. At one point, I would just throw them in as is. But now I set one or two into a garbage can before throwing them into the dumpster. So, basically, I just hope waste management doesn't report me!

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    8. I've been saving all the little transformers from e-scrap. Most came from TVs & CRTs. I just easilly rip them from the circuit boards and put them in a bucket. It takes little effort and only a small space in the garage to store them. Over time I ended up with 138lbs of them @ .25. $35 for taking an extra 2 seconds each time I tear apart a componant. Its not much but its better then nothing.

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    9. Be careful when opening CRT monitors and TVs. Static electricity can buildup in them, particularly in the anode, and power supply unit (PSU), and remain for considerable periods of time. We're talking about 20-30 thousand volts, which could potentially be deadly, and at the very least will ruin your day.

      The static buildup can be discharged (whether it can be done safely or not, at home, is debatable) with the right tools (i.e. an insulated screwdriver, and alligator clamps). Actually newer units often automatically discharge, however it's good practice to assume every one you deal with doesn't, for whatever reason. If you are going to be opening a lot of CRTs it would be advisable to read up on how to properly do it, and then seriously consider whether you feel comfortable with the task.

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    10. how about lcd monitors/tvs- in know there are wires and stuff- but what about the main parts

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    11. The LCDs are cheaper because they don't have such heavy, bulky components. And actually, I believe they have mercury, so be careful when breaking them apart. They have transformers, ect. The more you avoid breaking them, the better. If they work at all, sell them used before selling them as shred steel. That being said...

      The LCD monitors have some gold components in their electronics that are worth more then motherboards.

      They have some cool components, polarizers, ect that are just fun to have.

      ReplyDelete