Lead Recovery From E-Waste part 2: Viewer Request Special
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- Опубліковано 28 вер 2024
- In this part 2 of a "Viewer Request Special" video series I tackle the often asked question of how to recover the lead from E-Waste. After my success at recovering tin, I thought I'd tackle lead next. Let's see if I can figure out a way to do it. Please visit the Urban Gold Mining section of my web site at mdpub.com/Urban... for more information.
My other channels: @electrogeek6437 Electronics & Retro-Computers
@MikesLapidaryFossils Rockhounding and Fossil Hunting.
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Hi Mike, Nice job! Rather simple process and it works!! 2 at-a-boys & a pat on the back! Enjoyed watching very much! Thumbs up! Stay safe! Jim
Great video. How does the saying go? You can please all the people some of the time and some of the people all of the time, but not all of the people all of the time. I think you're doing a wonderful job of teaching us, for free even! Thank you! Looking forward to your future videos. Have a safe and Happy New Year!
Excellent, worked out just as predicted. 👍
Tin and Lead are two different metals. They are both used in solder, but modern electronics doesn't have any Lead in it. If you are looking to recover LEAD from your e-waste solution, you are Wasting your time. (no Pun intended). The chemical make-up of solder from your e-waste is most likely SN AG CU. SN for Tin, AG for Silver and CU for copper. This is what manufacturers have been using for a long time now, commonly known as Lead-Free Solder. All the solder from dipping your memory sticks in acid won't contain any LEAD.
True, and I tried to make that clear to people. Still, I get a lot of requests to recover any lead in the e-waste. Older stuff does still have some lead in it. Surprisingly, I did get some lead from the memory sticks, but not much. Some of them may have been quite old. Some also may have been high-reliability types for which there can be exceptions to lead use.
I find a surprising amount of old boards that look like solder was painted on with a 4 inch paint brush..
Guess it depends on location as it's not uncommon here to find 40 and 50 year old boards from telecoms, radios and power testing equipment. I have suspected the sweet smell when you break some is the lead pcb, but i have not gone specifically to check yet.
@@colonialcharlie8702. It's my experience too. I have tons of old obsolete radio equipment in stock. The electronic components were way bigger back then, and the tin used for the tin/lead solder was inexpensive at that time. Therefore, the solder on all those PCBs was applied in a quantity ten times higher than what is used today.
Warning: PCBs from the '70s/'80 was commonly made of various fibers impregnated with formaldehyde. Don't heat them! They have a characteristic sour/sweet smell, pretty irritating fir the nose. Keep your boards whole/intact, and depopulate them the hydrometallurgical way.
Nickle? Some peoples kids. Never satisfied I tell you. Lol,,,, I could see Tin, most solder today is tin, maybe some silver and or zinc added in. Tin was up to 22 bucks a pound in 2022, way way more than copper. So tin recovery might make some money if your willing to wait for the price to go up.
I think your doing a great with chemistry.
In my head it's always been a question of wastes.
You go through, pull the gold, PGM, Silver, copper. But in theory you'd have tin, zinc, lead in varying amounts somewhere in the reactions.
I know it unlikely to be a profitable to recover but it's always been a question of could you.
Well done Mike ,thanks for sharing.
Good job. Well done love your content. Lol now they want you to get the Nickel out. Next it will be how do you turn lead into Gold. Lol😅
Nice 👍👍👍 ... Cone mold?
I'd have used my cone mold if I'd done a bigger batch. The metal tends to stick in the point on small batches. It's hard to remove.
I get my lead from a neighbor who shots his air power pellet rifle at wood stumps i find him on the side of the road. LoL 20 pds on the last clean up.
I love to see you Charing your science! Keep on!
And again...
I want to recommend the electro chemical process use in a lead acid batteries to regain lead and sulfuric acid.
@gilgoldmuenze2570. I convert all lead substances from WEEE (e-waste) to lead sulfate. By electrowinning I get not only metallic lead but all my sulphuric acid back again at the same time. Not that it matters much economically as all my H2SO4 is homemade at no cost from waste material. I process all lead acid batteries at home; with full metal recovery, and no toxic waste at all!
@@zero-waste Perfect! This is what I'm thinking every time is see some handling of lead Sulfate.
@@gilgoldmuenze2570. You can also electrowin lead from lead chloride, but lead nitrate must be converted to lead sulfate.
Would you like to discuss various matters within recycling/refining, and exchange info?
@@zero-waste
Think of this: when u do the last step of making the waste solution safe to dispose by dropping all metals (mostly iron) by adding sodium hydroxide, u get A lot of Sulfate salts. How to get the sulfuric acid back? Mix the sodium Sulfate with lead acetate, so lead Sulfate drops out of solution, which u can put back to the eletrowinning process.
I would love to test this myself one day. And I would like to discuss or doing test with someone else.
I was thinking that if you pored in a cone mold it would all settle to the bottom.
If I had done a larger batch I would have used the cone mold. The metal prill tends to stick up in the top of the cone on small batches. It's hard to get out.
You seem more than an amateur chemist to me!!
Nobody is paying me, so I haven't lost my amateur status yet.😄
I am curious, how does lead disolve in HCl, if PbCl2 is insoluble in water? Does it form chloroplumbic acid or something?
Lead chloride is somewhat soluble in dilute HCl. More soluble in concentrated HCl.
@cpm1003. PbCl2 easily dissolves in hot concentrated HCl. Electrowinning yields metallic lead, and all your HCl back again.
However, trying to dissolve lead-solder with HCl does not work well. Most of the tin is dissolved but the lead starts creating a passivation layer in contact with HCl, thus around half the lead will not dissolve. Same problem with lead free solder due to the presence of silver/copper/other metals in the solder.
I solely use the well known two step process to recover 100% of the tin and lead from solder by depopulating Printed Circuit Boards the acid way. Very weak 4 to 6% HCl (long time), followed by a thorough flushing/cleansing of each board with distilled water. Then into weak 4 to 6% HNO3 (short time) for removal of lead, and any remaining tin. Virtually every single bit of metal on PCBs are recovered!
Hey buddy how about stripping the lead oxide from the ceramic junk out of lead acid batteries?
Probably lead dust, so wet grind?
My brother and I tried this but we just couldn't get the retort hot enough inside the wood stove...
We stopped because we were very worried about the lead Vapor going everywhere too, good point.
The yellow lead is lead trioxide: don't smell it....
Where did you get your gloves? I bought a box from harbor freight and they were all left handed. I need to find some rights.
At 1:52 you talk about the Rose Act of reducing lead in pc boards. Well did the Rose Act prevent China, Russia, Japan, Korea from making pc boards using lead in their solder? I think not. Isn't the Rose Act an American legislation aimed at the American manufacturing industry? Those other countries couldn't give 2 cents about what America thinks, they are going to do what is best and cheapest for their industries. And, just where does most of the pc boards come from?, you guessed it, these other countries.
The RHOS act is actually a European directive. Other countries do care about it because they want to sell their products in Europe, especially big exporting countries like China and Korea. The US, Japan, etc. also want to be able to sell in Europe, so just about everyone got on board with it. And just so manufacturers don't have to maintain two separate production lines to sell outside Europe, they just started making everything RHOS compliant.
Thanks for that. I didn't know. So then in the modern pc board solder we can assume, tin, zinc, copper or other low melt metals? What about in the fishing industry, don't they still make sinkers made out of lead?
@@Alex-kp3hr A lot of states are banning lead sinkers and lead shotgun shot. A lot of sinkers are being made from tin these days. Birds swallow the pellets and small sinkers as crop stones and their meat becomes tainted with lead. Bad for birds and bad for people like duck hunters who eat them.