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Recovering Gold and Silver from 1Kg of scrap LEDs part 2
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- Опубліковано 2 вер 2021
- In this video I recover the gold and silver contained in 1 Kg of scrap LED lamps. This is a semi-viewer request special, since I have seen interest in doing it in the comments section of other videos. This video was over four months in the making. We finally get to see how much gold and silver those LEDs contained. Please visit www.mdpub.com/U... for more information.
Equipment used in this video:
Refining Precious Metal Wastes by C. M Hoke amzn.to/3oNtvr0
Hamilton Beach Wave Crusher Blender amzn.to/38vE7Ct
3pcs Glass Graduated Beaker Set 500ml, 1000ml, 2000ml amzn.to/3faaHO3
12PK Watch Glasses, 6" (15cm) - Cover Lids for Beakers & Flasks amzn.to/3j5MHMS
Filtering Flask, 1000ml - Borosilicate Glass - Conical Shape, with Integral Side Arm www.amazon.com...
United Scientific Supplies JBF1150 Buchner Funnel, 1150 ml, Diameter 150 mm amzn.to/2WAamh7
Aroma Housewares AHP-303 Single Burner Hot Plate, Black amzn.to/378jL1p
300PCS 3ML Plastic Transfer Pipettes amzn.to/3f9JQ4B
AMMEX Clear Vinyl Medical Gloves amzn.to/2WBzB2A
Premium Filter Paper, 15cm, Pack of 100 amzn.to/379BZzu
#4-8Kg Clay Graphite Crucible for Silver, Copper, Brass, Aluminum amzn.to/3ffig5Z
Galvanized Steel Brake Line Coil, 1/4 x 25 amzn.to/2WFsg25
Chemicals used in this video:
Custom Building Products Sulfamic Acid amzn.to/3lc3aSy
Bonide 1-Pound Granules Stump-Out, 4 Pack amzn.to/2Vlty1y
Sulfuric Acid Drain Opener, 32 fl oz (2) amzn.to/3iX7Hpc
Tin Shot (1 Pound | 99.9+% Pure) Raw Tin Metal by MS MetalShipper amzn.to/3fclLKl
Easy Peasy Urea Fertilizer amzn.to/38q5Xjx
Thanks for taking one for the team! I had been wondering what the yield would be as I worked in the signage industry before covid hit. Got a few buckets full of LEDs to process someday. Various types of SMD leds- no legs. Couldn't help myself from collecting them because you can totally see the little gold bonding wires, with the lenses magnifying them just to taunt us.
It's a real nuisance when work gets in the way of hobbies !!! 😄. That was a great part 2 Mike, imagine if the results for Au and Ag were swapped, now that would have been a nice result. Keep up the great work and videos. 👍
That was a mix of all kind of different LEDs. Some LEDs will contain more gold than others. You can usually see the bond wire on ones that will have more gold. Otherwise probably mostly silver
You did not disappoint with these videos!
Very entertaining and educational.
I was way off on my guess of the yield.
It's good to know that there is an approximate 20 : 1 silver to gold ratio.
You did real good my friend!
Very nice to see the conclusion of this experiment! Like expected there wasn't that much gold, but it's good to know how much there is and there was even some nice silver bonus!
I really enjoy efficiency, so e.g. I loved it when you started recovering the silver from your waste. Also for this reason I'm always a bit annoyed when the otherwise amazing Sreetips talks about how he throws away the copper from his waste treatment.
I understand that you don't necessarily need every penny so you let others cash in your scrap steel, but I would love to see you recover the copper from your waste treatment. I just hope it is worth the effort, but it surely would make a great video either way.
Yes, I am saving the cement copper from my waste buckets. It is starting to pile up. It is dirty nasty stuff though. It's contaminated with all kinds of stuff. I'd need to find a way to purify it before I could sell it. However, I don't really want to pour a lot of expense into it or the copper could become a money pit. I'm thinking some sort of electrolytic refining maybe. With recovery of precious metals from the anode slimes as a way to offset costs.
@@omegageek64 electrolysis sounds like a good way to purify but might indeed be rather costly. Have you ever tried straight up melting it in a forge? I'm no expert on melting (s)metals, but I always wondered if that could work.
If so, remember that EwasteBen earned well over the copper price by selling his melted copper bars online. I don't think anyone would blame you if you'd get more money out of it that way!
@@Alrik. Melting copper is pretty energy intensive too. I did try melting some of my cement copper some months back. It didn't go very well. I think I need to crush it, screen it, clean it and magnetically separate out any remaining iron before melting. I'd probably need to do that before electrolytic processing too. so it looks like I need to build some sort of crushing/washing/separating plant if I am going to play around with the cement copper.
@@omegageek64 too bad it didn't work all too well.
It's nice to hear you're thinking about it and I really hope you can find a way to make it profitable. I'm sure I speak for many viewers when I say it would make for super interesting videos! :D
Silver is the most conductive metal it conducts electricity better than any other metal as well as being the shiniest or most reflective as you mentioned
Thanks for mentioning the vacuum pump syphoning. What I do is use a regulator to adjust the vacuum. I little bit more set up and parts.
This was a great video and will be a good addition to the wealth of e-waste info on utube
Wearing the shirt from the Edison Ford museum at the end. I have always loved that comment from Ford.
Good eye. I can tell you are watchimg more than just my e-waste videos.
Higher-powered surface mount leds use silver paste to bond the led silicon to the housing/base. Look up a magnified picture of a Luminus SBT-90 led for an exaggerated example. Some of the large leds also have a lot of bond wires.
I am watching back all your old videos on this channel and found the leaching video you did over a year ago where you showed how you recover gold plating. At the end you explained how you were going to scale that up, but I haven't seen any videos since where you show the process again. Do you still use it? If so I would love to see an updated version.
Don't be afraid to create seemingly repetitive content, I think not many people would watch back all your old videos, so many new subscribers probably haven't seen it yet.
I keep threatening to do a new Eco-Goldex video, but never seem to get around to it. I have accumulated a fairly large amount of gold plated scrap in anticipation, but always seem to get side-tracked onto something else. Eventually it will happen, if only to free up space in my workshop by getting rid of all the accumulated buckets and boxes of stuff with gold plating.
@@omegageek64 I guess I'll just be waiting until it comes then! In the meantime I have about another dozen hours of your videos to catch up on ;)
Nice 👍🏾
Yep iron in solution goes Orange. Brown on copper instead of silver could be palladium.
Hi Mike, Fantastic set of videos! Thanks again for your wonderful expertise & diligence in explaining all the various steps involved! Can the sludge that was on the bottom of the silver settling beaker be tested for missed gold & silver? Thanks again. Have a great weekend! Jim in Phoenix
I discarded the sludge, but I'm thinking maybe I shouldn't have so quickly.
@@omegageek64 it likely had gallium, selenium and some rare earth's , interesting stuff even without gold...
Next time you might like to try dropping the gold from dirty solutions with oxalic acid. This method drops the gold and ONLY the gold. It is very simple but needs to be prepared properly. I use OA for most of my precipitations. It is very cheap as well!
It drops nickel and cobalt , so when you say only gold, under was conditions?
No Nickel or cobalt in Aussie gold, not sure about other places.@@petevenuti7355
Hey, what is the funnel you are using here, looks super cool and simple to use!
Did I miss something? After you added the smb and let it sit overnight, you said you filtered out the gold, but how did you get the silver out? After the gold drop did you then put copper into the solution to cement out silver?
Copper nitrate solution has a density around 1.15 g/ml
Iron nitrate solution 1.64 g/ml.
That might cause the stratification in the liquid..
The iron is settling due to saturation of iron in solution. Best method would be to add more acid and distilled water .
The waste liquid with a layer of gold on the bottom is like I seen on sreetips.
Shouldn't need any free nitric to begin the cement process. Concentrated silver solutions need to be diluted 25 to 50 percent to prevent passivation.
Could that powder that settle during cementation be stannic tin?
Not sure how fine of a filter you used.
No surprise, the legs of the led’s are silver plated
Urea can make [Ag(NH3)2]OH heating can drive out some of the NH3 or adding CH2O
CH2O + 4Ag(NH3)2OH → (NH4)2CO3 + 6NH3 + 4Ag + 2H2O
Why do you not making Aqua regia first before dissolve the LED instead add nitric acid step by step? what's the % of the nitric acid and hydrochloric acid you using?
.2g/kg equates to 6.45toz/tonne. About USD11,000/t. I think the gold miners on Discovery Channel would be over the moon with that return. (think my sums are right).
What was the gold weight
It is so interesting to see when not everything goes as it planned: like in real life :) And also, checking how much stuff there is in reality in each component gives info not only if something should be put together with other components or not scrapped at all.
The bit that you note about copper recovery and the idea for cell purification is nice. Did you thought about combo copper and nitric acid recovery (NurdRage video: ua-cam.com/video/l8uQWibpRYk/v-deo.html). I did not seen it checked on any Precious Metal recovery channel yet. It could be interesting dependingly on the price of your nitric (and at the same time you recover copper by electrolysis). I am curious how economically viable this method is.
You make great videos, wonderful to watch'n'chill :) Keep on cooking :P
Brother,
what if only the white ...
Interesting but.not worth as chemical gone through process is more value than a metal recovered
Yes. I knew going in it would almost certainly be a losing proposition. I just wanted to know how much gold and silver was really there.
@@omegageek64 yeah dude it was great experience
Normally its a nice yellow... Today its very orangish. Something is contaminating it. Yeah, YOU !
I can NOT believe people trust you with processing they're materials.