Attempting to recover gold contained in gold corner BGA bottoms
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- Опубліковано 12 вер 2024
- In this video I attempt to recover the gold contained in over 2 lbs of gold corner BGA bottoms using the same methods I use to get gold and silver out of IC chips. There were many issues encountered along the way. Watch to the end to see if it was worth it. Please visit www.mdpub.com/U... for more information.
Equipment used in this video:
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
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Premium Filter Paper, 15cm, Pack of 100 amzn.to/379BZzu
#4-8Kg Clay Graphite Crucible for Silver, Copper, Brass, Aluminum amzn.to/3ffig5Z
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
This has been a much anticipated video and you did not disappoint!
The yield is disappointing but what do you do! It is what it is.
I'm guessing that it's significantly less than a Tenth of a Gram.... from a dang kilo!! That's so crazy! I'm the type of person that holds onto every component until I'm 100% sure that it's just not worth it. You are the first person that I've seen do a video on the bottoms, just like you said other UA-camrs did it but never posted the video... why because the yield. To me they made a mistake. Because I can appreciate this channel even more than I already did, because you show us what we really need to see even if you don't have a nugget of gold at the end.
I have so much more good things to say, but this comment is probably long enough and I don't want you to pass it up because of its length.
Thank you My Friend!!!
Interesting result! My best recovery was 0.47g from 1,000g of bottoms. I used Nitric : H2O 1:2 and then AR 4:1. Sure not a lot but worth a try.
My average return on tops is 9.15g per Kg of tops only. I really like your work and am sorry that I have only just discovered your channel!
That still $50 AUD of gold. Less chemicals other expenses.
Only thing I can think to try different would be after you dissolved all (or should say most of) the tin off and you were left with copper and potentially gold would be to melt that all together and pour out in flakes into water and hit that with the nitric, rinse off then aqua regia. Reason being that if it’s karat gold, going straight to aqua regia like you did wouldn’t yield much gold because of the karat value (usually 18k in the chips, not 24k). If you melted it together with the copper and basically inquarted the gold, you may have been able to get a slightly higher yield because the nitric bath would remove all the base metals even from the karat gold. At the least, a good incineration always helps out in refining and adding that step wouldn’t hurt anything and can only help. Just my two cents anyway. I still don’t think you would get much more gold but it might be enough to consider a yield and at least have a slightly darker color than what you had on the spoon.
I just dump the bottoms into AP and forget about them. Any gold foils I collect afterwards is a bonus but it's usually nothing that I can measure. I expect the solder balls run about 3% silver so that's where you'll find the value
ikr, i do the same
At 3% that silver will add up quickly. May need a few buckets worth for it to make sense but still.
Thumbs up for honesty. I have a friend who thinks everything that glitters is gold. He says "man that's a lot of gold". I tell him don't waste your time. He dose, then comes back to me asking what he did wrong . Still believing he somehow lost gold. I tell him again. That's gold flashing not gold plating. If you had 100 lbs of them you would get a few grams, maybe. Don't waste your time. Quit letting the lure of gold drive you to insanity. Me, I could care less about the gold. It just another piece of metal. I do it for something to do
I have been collecting those same BGA bottoms and I haven't tried my idea yet. I plan to use my belt sander to sand off all the copper contact points on the bottom. I would then incinerate and grind up the remains. In theory it would only be copper, gold and ash waste left right? I will let ya know when I try, I don't have a worthwhile stockpile yet.
Mike, I think you should have done a stannous chloride test on your first nitric dissolution, because it's likely that you put a considerable amount of gold in solution during that time. Why do I say that? Because you may not have gotten all the HCl out in your rinsing of the solids the first time. You rinsed it 3 times, but you didn't do a ph test on what remained from that HCl boil. Perhaps 2 HCl boils may have been more productive as it concerned tin. I have trouble believing that there is such a small amount of gold in those chips. But I'm no expert, by any means. Maybe now, 2 years later, you know what happened. If so, I'd love to hear your thoughts, although you may have already given them in the comment section. I will read the comments soon. Thanks for the labor you put into it.
That's a shame, I hoping for some measureable result. Thank you for doing this experiment Mike.
I would suggest for the fiber boards... Dip them in hot aqua regia... Dissolve the gold directly off the boards... Then precipitation should leave most of the other metals in solution
I have found that running though my roller mill is better than burning.
the black thing left in the beaker is the gold..no need to dissolve in aqua regia..just boil more with nitric untill the black gold turn brown..
I would test a sample before wasting nitric on the rest of the slimes.
I would think you'd get best results by treating the bottoms in distilled water and Nitric with some heat. That should dissolve silver and base metals, but not gold. The silver could be recovered by cementation on copper. The gold could then be processed in AR. In any event, unfortunately, there's probably never going to be enough gold to justify the cost of processing. 😞
Fix the air gauge. The people need to know. What's the model of line are you using and the diameter. What's the angle of the bend and how deep should you insert it? See easier to fix the gauge than answer all that.
Diameter? Angle of bend? How deep? Are we still talking about the air line?
I would split the fibre and work the upper part only. This way you could get rid of the tin completely.
I tried your way. Think that will bey process going forward. Thanks.
What about soaking in HCL before doing anything else?
Melting point of tin is 450° aluminum is somewhere around 1200 and gold is almost 2,000 so temperature control of course would be ideal just be careful you don't end up alloying aluminum with gold because you'll end up with that intermetallic purple plague which has a kind of cool look because I like purple but I heard it's a wicked pain in the ass to un-alloy, but hey if it happens yet another potential experiment for future video 😅
Here's a thought. For the visible gold enig that is on the surface, how about just using HCl + bleach to recover just that first. I know it's not much, but doing this first with each batch, over time, you'll get a good amount. It does not cost anything to do this first. Then you can pyrolize the chips for what is inside.
21:37 You should try blending (chop/grind) that dry because I think you'll have better success that way. You know just like you do when you're making beer cans into thermite.
I can't say 100% because I've never tried but it seems to me that if it's not dry you'll cause a lot of cavitation did I think would likely result in the blades missing most of the targets but if you've never tried it you might try that one time just to see how it compares because I'm pretty certain that you'll have better contact between the blades and the targets they're trying to hit
I think the whole experiment was compromised by the lead and tin. I'm going to try it without the tin and lead to mess things up. I don't have enough bottoms at this point.
I watch every vid you turn out on metals and love them all. Even the ones that don't turn out so well are still informative. To your good health.
Just finished my bga bottoms there's gold woven between 4 layers fiberglass and 2 layers of copper
Thank you for sharing this super interesting experiment! :D
20:54 Have you ever gotten any of that Purple Funk from gold aluminum alloy? I hear it's hard to deal with
my friend for what ever is worth, i always get preety good amount of gold out of them, what i do is i cut the centers out where the gold is and put it in worm a, r with a little extra nitric , i hope it works for you as good it work for me.
You could cupell what's left and not have to deal with hardly any acid since you're pulling copper out assuming it's got most of the gold and I understand you can make DIY cupell out of bone Ash if you're inclined to do such things
I was wondering why you.don't use water in the blender ?
سلام استاد لطفا اسیدهای نیتریک وکلریدریک
قبل وخوده اکئولوژیا رامیفرمائید
I got pretty much the same result, never got more than dirty glass wear
Again another great show great job
i put these seperately into ap solution and it works just fine.
Interesting, not worth it. But fud U say there is top part with gold in it? If so is the top worth the time and acid cheers Graham.
Blacklabelonthebedrocks suggested separating the layers. I grabbed a handful and in less time than it takes to shuck the tops i seperated the fiber layer with the gold and tiny gold corner and left the tin and copper behind. Thinking treat it just like ribbon ends.
Give that a try before swearing off bga bottoms.
The best and only meaningful way of recovery at a profit is to melt after HCL bath then pour the metal into an anode and run through a copper cell, you get pure copper and the PMs are in the slimes, but it takes a couple kilos at a time for it to be worth while, and the copper pays for the processing.
Thank you.
I think you have gold still in that goo .
Can you boil it in HCL before you ash the chips?
Why is tin such a problem? 24:12
I looked on Google but Google if you haven't noticed is really sucking bad in the last few years and particularly lately much to my chagrin so I didn't locate much useful information and was hoping you would explain it because I've heard that multiple times but never with anything resembling a specific explanation mostly consisting of just don't do it which just doesn't work for me
As far as I can tell, hot nitric acid reacts with tin to form metastannic acid which is insoluble in basically anything. I'm guessing you can filter it out, but I think it complicates recovery of gold. Some people suggest using hydrochloric acid to dissolve the tin first. On a related note, if you dissolve fairly pure tin in hydrochloric acid you get stannous chloride, which you can use to test for gold in solution.
I appologize for the late comment. I assure you there is far more platinum in those botttoms than the the small amount gold youll receive from them. the key is to pulverize the bottoms, fiberglass and all. May not be worth it to you as far as a profit but its there
Silver soldier with tin mixed
What size screen are you using
I just process them with AP solution and call it a day
God I love you videos
I was wondering if you may be interested in the last bead I made. I live in central Florida. Just let me know, I can give you a deal on it.
Is that concentrated HCL to get rid of the tin?
Or do you just use muriatic acid.
One in the same. HCl acid is muriatic acid.
The only way that works for me to deal with that grey goo is melt it back to tin metal Beads then process with hot hydrochloric.
Generally, I get 0.2 g of gold from a kilogram
Silver soldier
Maybe try to sell them for copper ?
get rid of any silicon first you had a little trouble with the burn i think
At least you tried and shared. I never bothered with those at all because it never pay for the materials. 👍
Could be a clump of silver
75% silver
Most of your gold fell out through your seave
put [t on a burner and melt he tin
You talk to much 😒
It's technique.