Gold Recovery From My Used Filters And Rags
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- čas přidán 24. 01. 2023
- In this video I show how I process a three year accumulation of gold filters and rags used to mop up spills and drips. I first incinerated them, then treated the ash with nitric acid to remove base metals. Then I treated the remains with aqua regia to extract the gold. How much gold did I get? Watch the video to find out. Please visit the Urban Gold Mining section of my web site at mdpub.com/UrbanGoldMining/ for more information.
Chemicals used in these videos:
Nitric Acid: xelexo.net/index.php?main_pag...
Custom Building Products Sulfamic Acid amzn.to/3lc3aSy
Hi-Yield Iron Sulfate (4 lbs.) amzn.to/3p788RA
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 Metalamzn.to/3fclLKl
Easy Peasy Urea Fertilizer amzn.to/38q5Xjx
Equipment and supplies used in these videos:
Cuisinart Smart Stick Two-Speed Hand Blender amzn.to/3GZQM1j
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/gp/product/B01...
United Scientific Supplies JBF1150 Buchner Funnel, 1150 ml, Diameter 150 mm amzn.to/2WAamh7
1 Stage HVAC Vacuum Pump 4.5cfm, 1/3hp 110V amzn.to/3Sip451
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
Refining Precious Metal Wastes by C. M Hoke amzn.to/3oNtvr0 - Věda a technologie
You did good my friend!!
I've seen filters processed many times, but this is one of the better to best one I've seen!
AWESOME!!!
Well Mike, that was just too easy. Good amount recovered. 👍
Good Morning Mike, Great job! Always happy to see that black powder adding up on the scale! Have a great day! Jim
Congratulations on that gold drop 👏
After dropping out gold with SMB, you should have tested to make sure there was no gold left in the solution before siphoning it off
Nice work Mike 👍
Great video thanks
Thinking about it, you could let the filters dry then store them tightly packed in an oxygen reduced environment. Just a container that is air tight, like a metal cookie tin lined with plastic, with any empty space packed with something smothering like a bit of fire blanket or left over ceramic wool) that should reduce any fire risk to nil, no oxygen = no fire. Something can only combust if it has oxygen and it will only continue to combust for as long as the oxygen remains available.
You should do a video of your fume hood. On how it works
Great to see you always think about safety, e.g. with storing the filters damp. This is very interesting to see, because of all the containments you have. Mr. Sreetips for example has way less tin, silver chloride and other nasty stuff in his filters, because jewellery is less contaminated than your electronic parts.
edit: It was actually way easier than expected to get the gold! But as always nice to see you get gold :D
Addition of sulfuric acid drops the lead and tin. Sreetips uses that method...
Correct me if I'm wrong but silver chloride survives ashing. So the silver chloride stays in the ash even after boiling it in nitric acid.
Treating the ash with lye and washing it with water before the nitric boil would have turned the silver chloride into silver oxide and that can dissolve in nitric acid.
Another way to extract the silver is to first go after the gold and treat the remaining leached ash with lye and the nitric acid.
I saved the ashes. I will attempt to extract silver from them in the future.
It looks like NaOH is needed to get from AgCl back to AgNO3. Due to solubility in water and acids.
So oxidize the silver then add HNO3 instead of sugar and filter from the ash as water soluble nitrate.
After dropping the gold with SMB, test the solution for remaining gold in solution before dumping the solution into stock pot.
Clean your room... OK Challenge accepted... Gimmie some AR... Oh, no, not the 15, I mean the liquid one... you know, the acid mixture...
Nice recovery. Amazing how much slips by in normal processing. Thanks for sharing
I soak my filters with HCL first, then add smb. Then I dry it (mud cake). Put it Into a melt dish and hit it with my Oxy Propane then process what's left
Flash paper and flash cotton only gets nitrated in Nitric acid togehter with Sulfuric acid, but I know the paper with nitrate salts in them smell like fireworks if you burn them.
Great video, told me a lot of what I need to know.
I want to know what the two little black "piggy-shaped" doodahs in the background are. Burning me uP!
1st comment ... Ha ... good stuff
Remember: silverchloride (AgCl) will only melt (728K) and boil(1820K) and NOT decompose! So the silver is still inside the solid stuff you filtered of!
Next video: where is the missing silver?
Cuz somewhere in there should be a little bit of silver. Maybe you can test this theory?
Thank you for sharing your work!
I saved the ash. I may try further processing to recover silver.
@@omegageek64 When testing for silver after the nitric acid digestion, put some of the liquid in a test tube or small container, then drop in a bit of concentrated hydrochloric acid. That way is more sensitive than dumping a bit of the liquid into a very dilute solution of hydrochloric acid like you did.
Hi Mike, Thanks for another great video.
One question though. I know you keep the filters but what do you do with the solids in the filter?
I am keeping them to attempt silver recovery from the silver chloride I am sure they contain.
@@omegageek64 After doing the nitric acid digestion, which should dissolve the silver, why don't you keep the liquid separate? You can then either drop the silver out as chloride - or precipitate the silver out on copper.
do your neighbors ever complain about the stinky smoke from this or your fume hood exhaust?
What about the silver chloride. I dont think nitric disolves silver chloride
I recently started watching your vids again and was wondering if you would do this video! Thanks! I also have a request, while you have touched on disposal throughout your videos, could you do one solely devoted to that? Like where to take it or dispose of it or at which point it can just be safely dumped down a drain or field? I have a place that takes chemical waste 30 minutes away but at what point do you take it there etc. I also have a 200' deep well, so how bad is it for that etc... Too many questions I know.
Never safe to reintroduce it into nature. If you have a place to take the chemicals, take them. Drop precious metals with copper, and drop copper with iron. At this point, you can further treat to make solids or take the iron chloride in which is how I did it. I would take it in 5 gallons at a time split between 2 five-gallon buckets so 2.5 gallons in each. For transportation put lids on them and place them in a large tote to prevent spills. Take in a pickup so you are not breathing the fumes. It is way better to do things properly than have the EPA fine you, put you in jail, or take your land OR ALL THREE.
See Sreetip's videos on processing all his waste. At the end, all that remains (if I recall correctly) is insoluble iron compounds which are not hazardous.