Gold Recovery via Copper Electrolysis - Part 2
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- Опубліковано 17 чер 2019
- In part 2 I show how I process the black slimes that settled out on the bottom of the plastic container. As usual I ramble a bit through this video, you can skip to 17:10 for the final weigh up and notes.
- Наука та технологія
That was one of the best I've seen and I've been watching for 3 years now!! Hundreds of videos, possibly thousands! So comparing it to that many is really good for you!!
Have a GREAT Day!!!
Absolutely incredible, and informative . I have such copper with ppm indication of precious metal. In 1980 i had seen entire plant of CuSO4 producing pure copper.
Today I think to apply this method again for same type experiment. Thanks.
Good comments.
Great job. For your slow filtrations use "celite" as a filter aid. Mix the celite powder with water then pour that into your buchner funnel containing filter paper then gently apply vacuum to suction off water, you will be left with an even bed of celite over the filter paper. Thicker beds cope easier with filtering fine particulate solutions. Try it, works a treat.
Sounds like a great tip, will definitely give it a try and report back! Filtering is probably my biggest bottleneck at the moment, also looking at building a filter press at the moment.
Very nice and educational video.
Your process is very close to the big PCB recycling facilities.
They shred the populated PCBs to around 20 mm size. Afterwards seperate steel with magnets und put the remaining material into big cruicibles. They heat up and eventually melt the content of the crucible. To seperate the metals from the slag, they add pure copper on the top which melts and trickles down through the slag because of the high desity of copper. On the way down the liquid copper collects other molten metals (copper, silver, gold, platinum) within the slag. In the end of this process all valuable metals are on the bottom of the cruicible and the slag on top.
They also use lead instead of copper in a similar way in order to seperate metals from the slag which doesn't get collected by copper because of different properties. But I think lead is not such a pleasant material to handle.
In the end the copper is electrichemically refined and the precious metals recovered like you did it in the video.
Thanks for the info! Yes, I have heard that this process scales up very well for industrial size setups. From memory, they also make most of their money from the refined Copper, with the precious metals being the cherry on top.
I learn so much on every video you make, thank you.
Hi Mike! thanks mate, yeah, this was all learning for me too! Very happy that it all worked out! Makes a pretty bad video if you don't actually end up with a bit of Gold at the end haha!
personally I like your rambling its like listening to my head with an accent haha
Old Video of yours but I just came across it. If you watch some of the Latest Videos of Screetips on UA-cam He sometimes Get the Color purple when Refining Gold with Copper and Silver. So he sometimes says Gold is the Color Purple. So those purple colors on the Pan are Gold just in a Different forms. Hope this helps for the future Refining videos. Thanks for your feedback and Helpful tips and advise you’ve posted over the years.
Hi great show the only problem is in my country we can't get the acid not that I like the idea is there some other way around it
I have 40-50 lbs of cleaned computer scrap from the older 360 to pentium 1's when the gold was heavy plated. I hope years of cutting pays off while I choose the best method of recovering the most gold and other precious metals. Thanks for sharing.
Sounds like a good amount of good quality stuff. I have a few kgs of ceramic processors still sitting around, but they are worth more to collectors now than their Gold content and that will probably just keep increasing over time.
Purple is GOLD,, Gold can have multiple colors depending on what form the gold is in... For instance, Gold slimes ( purple) ,,Gold Chloride (Carmel),,just to name a couple
Definitely, I've always known about purple colloidal Gold, was just surprised to see it there! I guess when the Copper atoms are "drawn away" and the Gold atoms stay behind, you can get very 'fine' Gold. Either way I made sure to get all of it into the beaker!
Great results!! Hopefully some day ill try all of that.. thanks for sharing your knowledge 🧠
Hey Willy, thanks for your comment, yes, I am very very happy about how well this worked! I think this method definitely has merit if you have enough material that can be treated this way. Have a great day mate.
Thai you...that was a great presentation
Appreciate the comment Stuart!
The purple stuff is gold contaminated with aluminium. Nile red was actually TRYING to make that stuff! If you were using computer parts, heat sincs etc, some al would have gotten mixed in
to filter such fine particles put some celite on the filter paper approx. 1-2 mm, now you can carefully filter the first ml of solution so that the celite does not whirl up
later you no longer have to pay attention to the celite, you can even filter very fine lithium chloride without clogging the filter
Yep, I did some experiments with Celite, can't quite remember the details but found that it worked great for some things and a total mess for others! But good tip for sure !
Excellent video, thanks for that, I have a lot of silver plated copper from industrial electrical cabinets, I have been thinking about doing the same to recover the silver and copper separately, this has made me decide to do it this way.
Hi Scooterist007, yeah, this is definitely a very nice way to go. If it is just Silver over Copper, I have heard of (but not tried myself) that you can use a similar cell with sodium persulfate (Na2S2O8) to directly deplate the Silver. Might be a good option for you, you should be able to find some instructions on the Gold Refining Forum.
@@successfulengineer cool thanks for that, I will have a look, I've never heard about sodium persulfate before, I will see if it is possible to buy in the UK.
@@simonbaldwin69 Yeah, I don't think it would be on a controlled substances list, so definitely worth looking into!
@@successfulengineer yes your right, it's easy enough to get, I did a search on grf but there wasn't much info on there, will have to do some more research.
@@simonbaldwin69 Sorry! My bad, I gave you the wrong chemical's name, you want to search for Sodium Sulfite, link here -> goldrefiningforum.com/phpBB3/viewtopic.php?f=50&t=26768
Fun experiment!
Yeah, definitely one of the better ones !
if you use regular steel plate you can easily extract the stainless out by magnet
AWESOME video!
Thanks again for your comment Mr. greens, always nice to hear from you!
Just a suggestion I heard from other videos , if you put a plastic guard with large holes in it between the cathodes and the anodes then you can get segregation between the precious metal slimes and any crumbling copper falling off the stainless steel plates , might take some thinking to get both the best segregation and the best circulation , and would still need a groove running through the bottom of each plastic plates for the aquarium pump , but would prevent most remixing of crumbling copper and precious metals , and jus a side bar , it's easier to dry the slimes with a Pyrex oven cooking dish , less contamination from stainless steel and any oxidizing acid left from the electrolyte. , Other than those thoughts, I loved the videos, great information.
Hi Roy, thanks for the great comment, yes, If I were doing this kind of thing more regularly, I would definitely be looking into anode bags to capture the slimes.
U r giving good knowledge thanks a lot
Thanks for the comment Mjahanz Khan
Outstanding.
Great idea with the electrolysis. I can't wait to see more on this in the future.
Yep, definitely one of the better ways to do this! Thanks for the comment.
Add vibration to that solution that you're trying to filter. Maybe an electric toothbrush is not going to be enough for the situation..
It works well when you're trying to eliminate air in ice cubes formation, during the freezing process to making and producing clean clear ice cubes..
But you might need something more like say a cordless Clippers or Shavers or a little motor with a off-balanced piece of metal attached to the shaft of the motor just something to keep the solution vibrating otherwise whatever settles at the bottom will clog the opening.
Awesome video! Have you thought about using H2SO4 to leach the copper from the anode sludge? Copper won't dissolve into an HCl solution without the presence of an oxidizer. It might save you that first aqua rega and cementing step.
That would get the copper out, but he'd still be left with metallic gold and silver commingled. At some point, he has to use nitric to separate the gold from the silver.
In this case, he went with AR, filtered out the silver chloride, and cemented out the gold. He could have also gone with straight nitric acid to dissolve the silver and copper, leaving the gold (and platinum) behind as a powder. The silver could just be cemented out of the nitrate solution with copper metal, and he'd end up with metallic silver instead of silver chloride.
Or at least that's my theory based on repeatedly watching how sreetips does his parting.
As Cory Buckles said, I was basically just lazy and went straight for AR when the HCl had basically no effect, but that pretty much guaranteed Silver Chloride. Next time round I will start with a Nitric acid leach which will pull the Copper and Silver into solution, then I can cement the Silver out fairly easily. For unknown pins you definitely want to start with HCl first in case they were brass pins and full of Tin, but these appear to be pretty much pure Copper. Luckily I still have many kgs of them to go through!
That makes complete sense. I completely forgot about that gosh darn silver. Thanks both of you guys for answering my questions. Anyways keep up the cool work!
you can add a little Sulfuric acid just to drop out any lead that might possibly make its way through the AR step
I can't remember the details from this video, but usually I use Sulfamic acid for denoxxing AR, which turns into Sulfuric acid, so don't usually have to add any specifically.
Hello, Great videos as usual! Always learning on your channel. Head-scratching question for you: Once you have the slimes, could they be mixed with assay fluxes & a small amount of lead as a collector metal, put in a furnace, melted, and poured into a cone mold. Then cupelled in a furnace?? Thanks for any insight you might have! Jim in Phoenix, AZ.
Hi Jim, absolutely, that would be possible, although you would probably use Litharge (Lead oxide) as the collector powder. The main problem is that you will likely still have a fair bit of Copper in there, I'm not an expert on smelting, but I think it is generally difficult to remove the Copper, sparging with oxygen comes to mind. Treating with acids gets you pretty much pure Gold fairly easily from the slimes. (I'm biased since I have more experience with the chemical approach)
@@dekonfrost7 Refining Precious Metals via wet chemistry is more dangerous than smelting. Strong mineral acids and toxic fumes. The dangers are less intuitive than simple high heat. The yields are often of higher purity, so there is a reward for the higher risk.
Hlo, At last how to get silver
For collecting Anode dirt use a cloth bag by using a cloth bag around the anode before you start electrolysis. So that it doesn't fall down and you don't have to filter it.
I've had a look around, but unfortunately they are quite hard to find locally. Also, my pins have too high a non-Copper content, so I usually need to manually clean the anodes once a day or so. Luckily the slimes settle very well, so it hasn't been as much of a problem as you would think.
But if you made it a 2 layer container system and at the end of your process. Then you simply lifted the inside container which was perforated with some kind of fabric filter or cotton filter at the bottom. So as you lifted the second inside container all the filtration would start to take place immediately and you'd be left with nothing but the dirt or dust or particles at the bottom trapped inside the second container. And now in your first container fresh clean solution ready to go again 🤔
Thought about a comment you made in regards to how hard the slimes are to filter out cause it was so slow. What if you used a centrifugal force to help separate out the liquid from solid. Think of it like a washing machine tub with filter paper on the inside of it. As you pour in the slime laden liquid, the liquid would be squeezed out by the centrifugal forces and the slime would stay on the inside. Would require you to build something probably but not anything complex.
Hi Chris, sounds like a variation on a filter press (which is probably what I need to build). The problem with a vacuum filter is that you can only get 1 atmosphere in pressure difference. I was thinking of building something where you compress the air above your filter, or alternatively, just physically push the material through a filter (like a big syringe). With the centrifugal system you may be able to get more than 1 atmosphere too. Definitely something worth looking into!
I can hear my teacher scream when seeing you write in that notebook.
Excelente.
Great results!!. thanks for sharing your knowledge . I shall start doing electrolysis system . could you please tell me the total quantity you get from copper per day.
Hi there, with the small system I was running, it was taking around 5 days to transfer 3kg of Copper from the anode to the cathode. Obviously that is controlled by the amount of current, which is limited by the area of the anode and cathode.
I know it would take extra effort & time but it would be interesting to run that recovered copper through a second time to get a sense of it's purity & how much PMs got through
They do this process industrially to obtain 99.99% copper. It's highly unlikely there's anything left in the copper.
Hi IsettasRock, as thefourthtuxzt mentioned, as long as you don't screw up anything too much you will probably end up with very nearly pure Copper. A proper assay on those pins would be great to know exactly what the yield should be, but even if I could just carry on getting the same from the many kgs I have left, I will be a very happy camper! The Copper is nice to recover too, just need to work out what kind of sale-able ornament or gadget I can cast it into! Always appreciate your comments!
A comment about casting.. if you are already using casting sand, why don't you use the two part mould where you can pour the metal into it and get exactly the shape you require. Cut of the pour hole and breather hole and use those in next cast? Love your vids by the way 😁
Great job! Can you explain "cementing out" . you used the bar of copper to "cement out" the gold. Is that just a single replacement reaction? and frees the gold metal from gold chloride by replacing it with copper?, which puts more copper into solution as CuCl and CuNo3,and leaving other metal salts in solution. Is that the jist of it? Sorry to show my lack of vernacular. Again, Nicely done and encouraging yield.
Hi James, sorry about the late response, yes, you have it exactly right, due to its position in the reactivity series, Copper will replace Silver, Gold and Platinum in solutions. I used this process very often, especially when I ended up adding too much HNO3 to a solution. You cannot easily chemically precipitate Gold from a solution with too much HNO3, so the easy solution was to add a bar of Copper, the excess HNO3 would consume the Copper, and once the HNO3 is all consumed the Gold will cement out and drop to the bottom of the container, ready to be re-refined.
Hey! Just found your channel. These electrolysis vids are fantastic. I'm wondering about your accent though. I saw somewhere in the comments that you are in New Zealand, but your speech sounds like a mixture of that and German.
Hi, South African originally, but have lived in New Zealand for a long time now.
@@successfulengineer It's kind of a neat combination.
Are you done with posting videos? It looks like the last one was 6 months ago?
Would it work with just one hanger to suspend the anodes so more of the anode is in the solution.
Perfect video. Is possible to do copper electrolysis on PCB, even for recovery palladium from vias? Maybe is possible to do copper electrolysis on pins without smelting?
Yes, it would definitely be possible to do the electrolysis if you have pcbs with large connected copper areas. I think the biggest problem will be the solder mask covering most of the Copper. I have not really worked out a good way to deal with PCBs yet!
@@successfulengineer Yes. De-masking is not a problem, 20mins boiling in NaOH + H2O remove almost every solder mask. Sometimes is useful leach PCB in HCl to remove tin solder. Then my idea is to do electrolysis of Cu to Inox plate. Because leaching consume lot of HCl + H2O2. Then only small ammounts of Pd,Au are retrieved. Is possible to contact you directly, mail, skype,...
Hi Kristian, put your email address in a comment and I will copy it and remove the comment.
Email sent Kristian
I wouldn't be surprised if that copper was 99% or better. Would it be worth trying to melt the slime's into another plate (small) and do a second cell to try and electroplate out the silver? it would take longer but would require less acid to process.
Hi Jarrod, something along those lines would definitely be possible. I think a big improvement would be to reduce the current down as the Anodes shrink, that way you don't end up with all the powder Copper mixed in with the Slimes, then you would only need a small amount of Nitric acid to take the Silver out of the Slimes. The Silver can then just be cemented out of the Silver Nitrate. Really my big mistake here was to start with HCl and then being lazy I went straight to AR, pretty much guaranteeing Silver Chloride!
hey realy nice to watch that it brings realy alot to pumt the solution arround and dont do a "overVoltage" great job !
Just a thought. When you pour your copper melt a couple of buss bars for the mounting points would let you fully submerge your mixed melt anode.
Hey Frank, yep, already done on the latest revision of anode. I also dropped the overall size to make 500g nicely fill the mold. Have been getting some nice consistent results lately.
Careful my friend. Purple is also the color of gold.
Yeah, I'm almost certain that it was, I've seen purple colloidal Gold a few times, but didn't expect it here! I guess when the Copper is carried to the Cathode you can end up with nearly atomic Gold particles in the sludge.
There are two copper oxides, one black and one red. I would expect that the purple is mainly copper oxide.
purple might largely consist of copper in this case
Crazy I mightnneed to try rhis
I'm fascinated by this stuff. But these videos may help me in a different manner: I'm teaching myself to electroplate, and my plates have been crunchy. Guess I need to turn down my voltage. I was plating at 1v before, so lower it is!
Cool, yeah, definitely lots of little variables to get electroplating working properly. I would be surprised if voltage is the problem for you, most of the time contamination is a bigger issue, let me know how you go.
i have some copper bus bars with thick nickel and tin plating.. would the same method of making anodes and the electrolyte formula be suitable?
Which kind of battery and supporters components for dc supply you use for this experiment?
How much voltage, and ampier was adjust very first stage?
Hi there, I think I mentioned in the PART 1 video all the details about Voltage, Current and how I mixed the solution.
I agree it's most likely silver chloride in the electrolytic cell . The question is where did the chloride come from? Without chlorine you'd of had just silver. Did you use tap water?
Definitely not Silver Chloride since there was no real Silver going into the process, was probably Nickel contamination, it is used as a barrier between the Copper and Gold and is known to cause problems with these cells.
You could keep the cell voltage from skyrocketing when the anodes are just about gone by using a constant-voltage/constant-current lab power supp;y. That will permit you to limit both the voltage and current. Do you think the milky solution problem would have been eliminated if your power supply had kept the cell voltage below 0.3xx Volts?
Hey Mike, my gut feel is that the cell was getting milky due to Nickel, it is used a barrier between the Copper and Gold and is well known to cause problems with these cells. I ran the cells initially from some CVCC modules, but they tend to have trouble regulating down at 0.3V, my lab supply didn't have the current I needed, so went with the simple solution in the end.
@@successfulengineer Good solution to regulation problem & great video. Thanks for posting it
@@AlmostMostlyMike Thanks for the comment mate, shout out if you get stuck anywhere, happy to help where I can.
Good night sir
I want to ask:
1. the copper slime process uses acid system with aqua regia?
2. After aqua regia is full of reaction, why do you add copper plates?
3. after the regia process, can you immediately use SMB (sodium metabisulpit)?
Hi Imron, yes, I used Aqua regia to dissolve the slimes, it is best to use Nitric acid first to remove the Cu and Ag, then AR to dissolve the Gold. I used too much HNO3 in my AR, that is why I cemented the precious metals out onto Cu plates. This gives cleaner Gold to dissolve a second time with AR, being careful not to put too much HNO3 this time. Yes, you could definitely use SMB straight after the initial dissolve, you just have to not have extra HNO3, so you could be careful with HNO3 addition or use Sulfamic acid to remove excess HNO3
@@successfulengineer
Hi...
You are my hero...please help me
I am trying to recovey the gold from AR solution without SMB
By using electolasysis...wt am i facing is...
1. What kind of metal need to use as anode and chatode
2. To apply electolysis to AR to recovery gold, wt kind of chemical need to use like KCN, NaCN or urea in order to nutralize the solution.
Please reply me....thanks
@@todaymotivation2196 Hi there, unfortunately I have never tried plating Gold out of an AR solution, but if I were going to try, I would probably use Gold as the cathode and something like Carbon, Pt or Titanium as the anode, but that is just a guess. Urea is often used to neutralise excess HNO3, but I have never used it, I always use Sulphamic acid (also called Sulfamic acid). If getting SMB is a problem for you, you can also make or buy Copperas (Iron Sulfate) to precipitate Gold from AR, or even just cementing onto a clean Cu bar will give reasonable purity.
I came to know very recently that that PURPEL DUST is actually gold nanoparticals!
Yep, purple often points to colloidal Gold, but it can also be a number of other metals.
hi great video, i noticed it in part one, i can t believe it but your handwriting is almost identical to mine. its so close its uncanny, and again at the end of part two.
Thanks for the comment! Yeah, that would be something interesting to notice ! At least no-one has ever complained about my handwriting!
@@successfulengineer haha, well just like mine its appalling haha
@@l33boiakamaishish LOL
Purple is color of gold buddy
Yeah, I've seen purple colloidal Gold a few times, but never expected it here!
I have been collecting powder gold from magnetite.. so powder it floats... problem I have is the powder gets trapped in fine sands... my guess looking maybe 40% gold in 60% sand.. I was thinking of melting it with a slag but now I'm thinking if I could pay someone to dissolve the gold then use this method to extract it out more pure.. some guy is selling hundreds of pounds of very cheap magnetitie. I put a few cups into a bucket added water and it became very murky. Then I banged the bucket a few times and waiting a month for it to dry out and settle.. once the layers formed I removed top layers and the bottoms seems to have the most gold but I do notice still some gold on the second to last layer.. before of the magnetitie dissolving 100 lbs would not be possible... the only way I get it out if using a n52 magnet half a teaspoon at a time. I'm getting a ton of very fine gold powder and it appears the miner is scooping it out and the powder has bonded to very fine dirt powder and he must not have know it is high yield. Does anyone have a easier way for me to remove the gold powder from 100lbs? I think good dust can be mined but most miners cannot see it because the gold is covered by very fine white silty mud... when I just panned out the magnetite without separating the mud it was very cloudy till I washed the mud away then I was not left with much gold.. but allowing to to settle and dry out they layers separated and could be panned
I don't think dissolving would work that well, I'm sure the magnetite would be quite reactive making it pretty much impossible to dissolve Gold out of it. If it were me I would probably look at something like the vertical magnetic separator I built (pipe with magnets) I might use a bigger diameter pipe with a strong electromagnet, then try to separate the Gold from the Magnetite in freefall to prevent the Gold getting trapped.
@@successfulengineer I was able to seperate it but now idk if I have fools gold... it's very sparkly in a bottle but at times goes dull.. idk is it possible there is zero gold in it? I put some in vingar and it was still there the next day shiny as ever... it seems too good to be true
Centrifugation works OK generally when filtration doesn’t.
Wait, am I following this correctly? You can recover over 3 grams of gold (about $150 US) from 1 kg (about 2.2lbs) of copper? Is this a certain type of copper? Or can I do this process with stuff like copper pipes?
That seems so unlikely that I must have missed something.
Oh wait those were gold plated copper pins from electronic devices. I missed that part from all the way at the beginning. lol
@@GeoffBosco lol, yeah, those were 1980s mainframe pins too, so had a pretty good average yield of 4g per kg of pins. Modern IDE type pins would be nowhere near that yield.
Hi , you should have done nitric process for 60 grms , you would have got more gold , which is blocked by copper u did hcl and nitrate, which became aquareija
🤔 why the copper pipe at the end of the circulation tubing?
👍
Can this be done as a basket style like with Streetips silver cell?
Yep, I believe it is done with Titanium baskets in industry.
I think Sreetips has a video where he makes a de plating cell using a copper mesh basket.
Can you just smelt your black gunk at the bottom of you container with a collector metal like lead and then cupel the prill from the conical mold?
Yes, absolutely, you wouldn't end up with very pure Gold like you do from a chemical refine, but if you are set up for smelting that would work fine.
@@successfulengineer ty for your reply
Hi my friend can you tell me what is white circle material on the heating element?
Just a ceramic heat spreader bought from a local lab supplies shop
Amazing 🎉🎉❤😊 osmosis recovery Isotop fusion rare minerals
for sure purple is gold, use a glass next time.
Yeah, I've seen purple colloidal Gold a few times, but never expected it here! Luckily I managed to get most of it into the beaker after roasting!
@@successfulengineer normally see it when i incinerate dealing with gold filled. I try to use distilled water to help with the silver chloride as well, or do a nitrite bath on the slime, the left over acid from the cell would help with the possibility of lead in solution. Still love seeing some new videos on refining.
Definitely will user Nitric acid first next time, then I can cement on Copper to also recover the Silver, although it is probably not much Silver. Thanks!
How many percent is nitric acid you are using?
68%, but usually used diluted or in small quantities depending on what I'm doing. Acid concentration is usually not a very big deal.
Thank you
good turnout
Yeah, always good when things turn out better than you expect! A proper assay on those pins would be great to figure out whether I'm getting pretty much all the Gold, but either way with that kind of yield it is well worth doing!
انك تستخدم تحليل للنحاس بي ملح البحر هل هدا صحيح❤
With a titanium anode basket/plate and an anode bag to contain the pins in contact with the titanium, there's no need to cast anode bars at all.
Wouldnt the Copper have trouble "getting out" of a fully and thick plated pin ?
Actually, no. The plating goes to slimes, allowing the copper to be exposed.
The cloudiness in the copper sulphate (in my experiments) will settle when the solution is diluted. Looks to be very finely divided copper. Which sort of makes sense if the higher current density at the anode is driving the copper out faster than it can dissolve. That's my theory at the moment anyway. Use of anode bags should reduce the effect, or at least contain it to smaller volumes.
The purple is probably -
"Purple of Cassius " ?
Yeah, I wondered about that, but in the end I couldn't see how Gold would be going into solution and precipitating out colloidally. I think it might also be some form of Nickel, but honestly no way to know for sure!
how to make gold solution for electrolysis refinery. how to prepare liquid solution
The purple is likely colloidal gold.
Nice, you got silver instead of nickel under plating, right next time use nitric first and recover silver
Some of the pins still had some wirewarap wire attached, probably the source of the Silver. Definitly going with Nitric first next time !
As jy die uitgedroogde sediment sou smelt met oxy-asetileen vlam, sal jy al die metale suksesvol herwin?
Ja, verseker, maar dit sal redelik onsuiwer Goud wees, afhangende van hoe versigtig jy werk, sal jy seker jou Goud so 50% suiwer kan uitkry. Ek sou die poeier meng met Borax en Soda Ash as ek dit smelt, en dan dit goed warm kry met die vlam.
@@successfulengineer Om dit eers te was met nitric sal seker baie onsuiwerhede uithaal? Solank ons die resultaat met XRF kan scan om goud % te bepaal sal ek gelukkig wees.
@@levettp Ja, met die Nitric was sal jy dit moontelik tot in die middel 90's kry. Sal definatief kan XRF. Die grootste ding om te watch is wat die metaal in die pennetjies is, die wat ek gebruik het was 100% Cu, so ek het nie probleme met Tin of Zinc gehad nie. Baie pennetjies is Brass of Bronze, so jy sal verseker meer probleme daarmee he. Jy sal in daai geval eers die sediment met HCl moet was om van dit ontslae te raak. Daar is ook Nickel in die sop, maar dit it gewoonlik redelik min.
@@successfulengineer Ons ontwikkel 'n blast furnace stelsel om kopererts te verwerk wat heelwat ander waardevolle metale in het. Ek vermoed dat ons net in die silwer en goud sal belangstel wat in die sediment is na elektro-herwinning. Dalk maar eers net alles smelt en scan met XRF en dan verder beplan. Sal selfs oorweeg om als met sianied op te los en dan ioon uitruil resin gebruik wat selektief silwer en goud laat presipiteer? Dankie vir jou videos en advies, ek leer baie!
Great video,thanx.However big disappointment for using the FINAL chemistry separation for Ag !!! Tell me please what I am missing here: Why should we use electrolises for Cu separation instead of the way , how people did it back in the days ??? Using flame torch... without the need of electrolyses ? ...the classical metod when ading Pb and heating it together on a cement ... Why is this better ? Thank you .
Because Cooper separation from the aloy has never been really a big problem as far as I know even wehen using the old clasical method , hasn't it ? . Separating silver and other precious metal contaminants from the Gold ....that is the true difficult story.... That is the chemistry part,ok...
Tell me please what I am missing here.... Thanx
Btw. The chemistry PART 2 is absolutely fine, getting 99.9 ? thumbs up.
I just dont get the electrolises Cu part... Why to overcomplicate?
For Ag/Au separation we must have a bit different electrolictic solution in the Beaker , dont we ??? 😊
You may consider making video on this.
Anyway thank you.
Separating a small amount of Gold from a large amount of Copper is very difficult, hard to do with smelting because Copper is not very reactive and expensive to do with chemicals. This is basically how industrial scale E-waste processing is done.
Здравствуйте! Можно ли включить субтитры в настройках.
Привет, я посмотрел, но не могу понять, как включить переводы. Он просит меня ввести субтитры вручную?
@@successfulengineer следующее видео в настройках надо будет указать и все будет автоматически.
It's a little bit confusing. To recover gold, shouldn't a solution of gold like AuSo4 or Aucl3 or something else should have been used?
How come CuSO4 solution helps in getting gold to be deposited on the cathode?
Hi mohd, yes, that is not what is happening here. The cathode contains pure Copper, Gold is in the black powder that remains.
@@successfulengineer ok, so if I want gold to get deposited on the cathode, which electrolytes I can use?
No idea, sorry, I guess it depends on what you are wanting to do, if you wanted to purify Gold by electrolysis, I'm sure it could be done with the right electrolyte. Unfortunately Gold in E-waste is usually attached to a lot of Copper, so for me the problem is usually to separate the Gold and Copper efficiently without making a lot of waste!
@@successfulengineer Ok, thanks for the reply.
The theory of electrolysis is easy but practicals seems way more complex.
If I will be able to to get pure gold from e waste, I'll reach out to you and share my results.
I think the green colour is characteristic of nickel.
Yep, that is completely possible, Nickel is commonly used as a barrier between the Copper and Gold.
Nitric first with dirty metal
For sure, definitely doing it that way next time with these pins, then I can just cement the Silver out and recover that too! For unknown pins you are probably better to start with HCl, just in case the pins were brass or bronze and could contain a high amount of Tin!
The only thing i seen that would have remedied your inaction of hydrochloric instead of the nitric you should have added hydrogen peroxide. This would oxidize the metals alowing everything but the gold to go into solution. You could use a bubbler but peroxide gets better results. Filtering large volumes of micro fines is always difficult. But i too have considered using electrolysis for refining to reduce the amount of expensive acid.
Ken Jett from what I understand peroxide is able to form radicals that react with gold and dissolve it, however bubbling oxygen through the solution doesn’t form them and so can’t react with the gold.
@@beeblaine539 the bubbler does add some oxygen but isn't as effective what it does do is create a circulation in the acid that aireates everything. But the peroxide is more effective.
Ken Jett ik what I was saying is that peroxide will disulve gold as well
@@beeblaine539 no peroxide will not dissolve gold it takes a much stronger oxidizer mixed with HCL to dissolve gold. Like nitric acid or sodium chloride will work. Either mixed with HCL is about only easy simple way. They are some more complicated ways using iodine or cyanide but more dangerous and makes more waste material.
Use porous pots to collect the anode/cathode mud so that they can be kept separated...the copper will fall off and into the anode mud contaminating the precious metals in the mud defeating your purpose...use copper cathodes only...just thinking out loud,
yeah, you are talking about anode bags, which are used when this is done industrially and works very well.
@@successfulengineer what about two plastic/glass containers with an electrolyte bridge...plastic/glass tube from one container to the other so the ions can exchange...the tube being high enough up from the bottom of the containers so that the mud can collect? making it easier to collect the anode/cathode mud?
@@whitenorthstar I like the sound of that, the slimes from the anode and loose Cu from the cathode are both fairly heavy, so will definitely prefer to sink into their own containers. You would need to circulate the electrolyte between the two containers, but no reason that couldn't be done relatively easily. And the bridge could be a fairly small pipe I imagine. Cool idea
@@successfulengineer why circulate the electrolyte?....its the same in both containers and bridge....it's only the cations/anions that are circulating/migrating.
@@whitenorthstar Not sure the reason, I expect that something build up around either the anode or cathode that causes problems. It's pretty commonly known that you have to circulate the electrolyte to get the best Cu deposition smoothness. I guess that if you don't actually care about the quality of the Cu deposition at the cathode, you may be able to get away with not circulating it. In my setup I actually fitted one of those plastic 'airstones' from an aquarium to get some circulation into the electrolyte.
سلام استاد
استاد ایا تیزاب را نمی توان برای الکترولیت انتخاب کرد ودر اون صورت
واکنش مضاعفی در حل شدن طلا در ظرف ایجاد نخواهد شد لطفا راهنمایی کنید
I. Do. An. Ap. Fore. The. Left over copper. Then. Wash. And. Do. A. Nitric. Filter. And wash. And. Then. Go. Fore. The gold.
Do not use a thermometer as a stirring rod.
like it that could be fun i may give that a tray tfs 👍😀👍
Boil the solution before filtering.
Hi, awsome videos! (And sorry for my shitty english, dont need it very often since my schooldays 25years ago,hope not heartin youre eyes by reading my text!) I must find a way to recovery a few gramms gold(and seperate all other metalls from the the stuff i got for my challenge)to made a ring without payin money for it(i ask the girl on my side and mother of my 5 kids if she marry me and she said"yes but made me a ring and pay no money for it" i think she think she made it easy for my and i paint some keyring gold.....but it escalate🤣) so i scrap all things with a cable or accu we dont need anymore that i can find including washingmashines,vaccuums,telephones,3old pc's,led strips,toaster,old stereos....absolute all i can find...so i must find a way to seperate the metalls from the organic stuff from the curcuit boards...i think i build the chain mill from one of your clips and hope to can build a lottle shaker table or something out of a old jig saw...and than start youre electrolyses way....but i hopr one of youre guys can tell me a complete instruction (like the cable job from the pc power supply to electrolysiscell and stuff) for q way that works to do the job one time to complete my callenge and gettin enough gold for one ring and enoough other stuff like silver,platinum and palladium to "pay"(you know...no money:/ its a bigger chqllenge than i started....really a challenge🤣😔but failing is not a option in my case) a guy who can put my little diamond proffesional in the ring i will made..because it not should fell out after 5minutes of waering it..so i am really happy about every tip i can get from anybody...thx a lot guys:)
Should have never touched the HCl until after you ate it down with nitric to get rid of everything but the gold.
What about Tin?
@@successfulengineer Tin is annoying... And yeah you need a hot HCl wash to deal with that much in the way you need the nitric for the silver... I guess I just don't really like the idea of giving so much to the aqua regia. I'm also used to the other side of electro where other metals mess with things, especially in any concentration. I'm sure it affected yield here too but maybe not as much since you cemented ultimately, although that limits purity by way of mechanical entrapment
Please with translation 🙂
AgCl is easy. Add NAOH --> Ag2O
Then add sugar--> Ag exothemic want to boil over. Put beaker in 5 gallon bucket to catch any boil over.
I failed to see any gold just weighing black dust into brown dust.
Yeah, I can see why someone could be a little sceptical. Us refiners hardly ever bother to melt small amounts of Gold, so just weighing the brown powder is quite adequate, but to the untrained eye, it might as well be coffee powder. I can however assure you that any brown powder I weigh up is 99.8%+ Gold
At 3min it was arcing and make colloidal metal. Very hard to fill. Too fine to filter. Next time stop earlier.
I can't figure out what you mean, doesn't seem to be much happening at 3 min
Can't you leave all that silver chloride in the sun and it'll turn to silver oxide?
You should be able to melt that into silver metal then.
I haven't done it yet so if I'm wrong feel free to laugh. I think that would work though.
Technically the sun can turn silver chloride into silver metal, but it is a super slow process, there are a few proven methods to do the conversion, I think sulfuric acid + iron was popular.
Should have melt it and cast something gold before you ended the video. For all we know the was rust or something you had. Just saying...
You basically filmed the boring stuff and cut out the interesting stuff in both videos. WASTE OF TIME
What exactly do you think I skipped ? 99% of the videos people are complaining every other day that I show too much detail and should skip more ?!?
So I watch over an hour of these two videos, and I didn’t get to see any gold. Very disappointing! 👎
The vast majority of people watching this kind of video are already doing some kind of Gold recovery (usually from E-waste), for them seeing the resultant brown powder is 100% equivalent to seeing a Gold bar or button. Sometimes even more so, because it is relatively easy to tell the purity of the Gold from the brown powder.
@@successfulengineer 😀
With a dimer on the electrolytic bath, you would be able to vary the voltage as you wish and do a selective electrolytic deposition with all the metals in solution one by one.
en.wikipedia.org/wiki/Electronegativities_of_the_elements_(data_page)
you are making copper not gold