Gold recovery from Aqua regia acid Use zinc powder.

  Рет қаралды 698,965

Archimedes Channel

Archimedes Channel

Күн бұрын

Пікірлер: 276
@MakeGold
@MakeGold 5 жыл бұрын
Recovery of Gold by Precipitation with Zinc. This sample has 10-20 grams of Zinc, which theoretically can precipitate 0.7 grams of gold from pregnant solution refining or aqua regia acid after use
@pagalavank6602
@pagalavank6602 5 жыл бұрын
Wanna talk with u can send me your contact details
@fazeenamustaffs4344
@fazeenamustaffs4344 5 жыл бұрын
thank u.
@fazeenamustaffs4344
@fazeenamustaffs4344 5 жыл бұрын
what u tp no
@rahulkabir8708
@rahulkabir8708 5 жыл бұрын
How much was IC cheap weight
@waldendgreat9274
@waldendgreat9274 5 жыл бұрын
How much gold does per gram of zinc can precipitate? Any table to refer sir?
@lorisk9296
@lorisk9296 5 жыл бұрын
What did u do with the bulk sediment before using zinc..it only shows in process the sediment from the sync powder...or is this video only to show how to get back remaining gold sediment left in aqua regia
@rrfields65
@rrfields65 5 жыл бұрын
Some HELPFUL TIPS for you Archimedes : 1 when you finish the hot water wash... rinse all your gold powder out of the beaker into a coffee filter with Borax already in it, and twist tight to ring out any excess water. 2 the powder does not need to be dried out completely . 3 wet sand your crucible bowl with 2000 grit sandpaper smooth...then fire it red hot and add Borax too hot glaze it hard. 4 Now once you have crucible bowl perfect add some more Borax and place the whole twisted coffee filter in and start the firing with propane 1st until it gets blood red hot, then go too acetylene brazing torch *( Not Cutting the cutting one )*because it will not blow the powder gold dust out of the crucible.
@MakeGold
@MakeGold 5 жыл бұрын
Thank you very much For your advice, I will take your way to use.
@mikelee5387
@mikelee5387 3 жыл бұрын
Robert Fields, i read your suggestion to archimides is perfect professional. May i know how do i seperate a fe2o3 hematite iron sand from tiny little palladium platinum in it. I use aqua ragia to leach it but iron are also leach into solution. The ore has been process by ballmill and concentrated by shaker table..
@karolinibatista3812
@karolinibatista3812 3 жыл бұрын
@@MakeGold how to increase the weight of gold with zinc dust ??
@amrendramishra545
@amrendramishra545 2 жыл бұрын
Can we foound gold from zinc powder
@chetanchavda6583
@chetanchavda6583 2 жыл бұрын
robert give your insta id i want to talk with you brother
@Glucoperon
@Glucoperon 4 жыл бұрын
Gold salt is a powerful oxidant, zinc powder a good reductant. Zinc is zerovalent in its metallic powder form, meaning it has 0 charge (not a salt). When mixed with gold salt with a charge of +3 per gold atom, electrons from the zinc powder are transferred to the gold, this reduces the gold iii to gold 0, which is the metallic non-salt form of gold, zinc loses 2 electrons to become a zinc ii salt. In essence, zinc and gold switch places in terms of salt vs metallic form. The optimal molar ratio of zinc powder to soluble gold salt is 3:2
@luckmanm3688
@luckmanm3688 3 жыл бұрын
Woow you mean salt gold waste fusion plasm spherical..yes..tk so much ..yourscience thise video
@luckmanm3688
@luckmanm3688 3 жыл бұрын
Amazing this video
@MetalRefining
@MetalRefining Жыл бұрын
really cool explanation. Which country are you from sir?
@BullProspecting
@BullProspecting Жыл бұрын
With that said, I just subscribed to your channel! I have a question, can caustic soda be used to denox aqua Regia. I tried it. Im on day 5 of letting it settle 😳
@Glucoperon
@Glucoperon Жыл бұрын
@@BullProspecting Caustic soda: (Na+ OH-) is not able to be oxidized and thus there is no way to reduce the NOx in solution. If the solution is no longer acidic and at neutral pH, the oxidative species may have decayed by 5 days but no, caustic soda doesnt denox. If you are at neutral pH or even just slightly acid youl have more problems on your hands now. If you add Zinc it will drop the gold from solution slowely but the zinc wont dissolve thanks to no acid so you will have a mess. without a strong acid environment, SMBS won't react with to form SO2 gas which is needed to drop the gold. To neutralize NOx you need something redox active towards the NOx like urea, metabisulfite, or vitamin C. In short. Urea or vit C are to deactivate the solution but not drop gold. They just save you money on zinc and SMBS. Zinc and SMBS are to drop gold out of acid solution but in a large excess they can both deactivate the aqua requa solution AND drop out the gold. So: Au-Auqua Regia --> urea or vitc --->Zinc or SMBS ---> Gold powder. OR. Au-Aqua Regia ---> LOTS of zinc or SMBS----> Gold powder.
@romanchomenko2912
@romanchomenko2912 4 жыл бұрын
Hi there over here in the UK its difficult to get the acids because we had a number of idiots using acids to burn flesh . The UK government made it clear you have to be licensed to use hazardous chemicals and to have the right protective gear visited by health and safety yes that's why it's difficult to extract gold from electronic wastes.
@jesudassmurugan2564
@jesudassmurugan2564 2 жыл бұрын
To bad Im willing to but all the e waste you have
@ابراهيماحمد-ر9ز
@ابراهيماحمد-ر9ز 4 жыл бұрын
Hello, and thank you for this video. I learned from him. I have a question: Did the zinc powder deposit copper with gold upon precipitation and got a lot of copper?
@suharyanto831
@suharyanto831 5 жыл бұрын
Sir, which one is more effective for precipitation, by zinc powder or SMB? In case of by using zinc powder, shall it be boiled? Thanks in advance
@Rob337_aka_CancelProof
@Rob337_aka_CancelProof Жыл бұрын
That has the look of a homemade melt dish... I wonder would you mind sharing what you made it out of? Or better yet maybe even make a video on the step by step procedure and all inclusive list of ingredients
@gregoryparent1121
@gregoryparent1121 Жыл бұрын
Awesome video! Thank you!!
@Magedfadele
@Magedfadele 9 ай бұрын
Good. Thank you🎉
@mohamedrifi919
@mohamedrifi919 2 жыл бұрын
سلام عليكم ورحمة الله وبركاته شكرا استاذ حفظك الله وزادك علما ونورا تحياتي لك وألف تحيت من المغرب الشقيق
@سیدجلیلمیرکاظمنژادفروهی
@سیدجلیلمیرکاظمنژادفروهی Жыл бұрын
سلام‌استاد استاد درصد نیتریک جهت از بین بردن زینک را لطف میکنید متشکرم .
@kylelugo4513
@kylelugo4513 3 жыл бұрын
Great job! Your video was fantastic. Do you know anything about iridium ? I have ore containing 40% Ir 43% Cu and 7% Au and other 10% not as interesting. i would like to know how to separate them efficiently.
@maynurnurzhakyt62
@maynurnurzhakyt62 2 жыл бұрын
h8dus
@prakashdave7468
@prakashdave7468 4 жыл бұрын
Hello brother .In our area .Water in gold but micro bit we can't see but it is scientific proof .How can I remove gold from water . Please reply
@frantiseklaluch6605
@frantiseklaluch6605 2 жыл бұрын
Grats for the gold you have, however, this is kinda pain to watch. How about to test, if there is gold in solution (SnCl2). May be boil the solution and let it stand for some time is more effective (less work). This zinc powder is effective, no doubt, but so much work and chemicals... FeSO4?
@mauriliosantanafilho2886
@mauriliosantanafilho2886 5 жыл бұрын
It'd be interesting if was subtitled in Spanish, French or Portugues, for I've problem to understand the English spoken in America; I've to see this video many times to try understand everything.
@laurennoyb539
@laurennoyb539 3 жыл бұрын
you seem pretty good to me. love from america :-)
@mr.asifshaikh3291
@mr.asifshaikh3291 5 жыл бұрын
U can use uriya and fairus powder for gold recover.. better then zinc powder.. Im always use u riya and fairus powder
@mauriciodibiaggio487
@mauriciodibiaggio487 4 жыл бұрын
How the Wohwill process for refining gold is done?
@zulmuzuki
@zulmuzuki 5 ай бұрын
Very good for high gold content 👍
@slimnoomen2217
@slimnoomen2217 2 жыл бұрын
Hello Sir, thanks for the video. When I used aqua regia to dissolve 1 g gold metal 18 Karats (Ratio 3:1 AR), after precipitating with SMB I got only 0.2 g powder even HNO3 was neutralized, what's the problem?
@moe3dprinting
@moe3dprinting 5 жыл бұрын
Can you use the same method - Aqua Regia - if dust gold is located in dirt and then use sodium metibisulfite
@MakeGold
@MakeGold 11 ай бұрын
Hey there! Thanks for watching the video!
@ImArrow
@ImArrow 4 жыл бұрын
What is that Zinc Powder called there are many types of Zinc Powders can you specify which one it is
@TINASHEMLENGA
@TINASHEMLENGA 2 ай бұрын
Zinc powder mining grade is best for gold precipitation or 99 percent zinc
@bedadiabderrezzak1488
@bedadiabderrezzak1488 2 жыл бұрын
It should refining gold with nitric acid by heating, what is the role of heating?
@arvidbackman9373
@arvidbackman9373 4 жыл бұрын
Where can i buy the powdered zinc with the added chemicals already added?
@arunruengronghiranya6557
@arunruengronghiranya6557 3 жыл бұрын
How many minutes do you wash the gold powder with hot nitric acid?
@deenislamkibaatein1714
@deenislamkibaatein1714 2 жыл бұрын
3 time
@engshafi780
@engshafi780 4 жыл бұрын
Sir how to recover gold from gold solution??
@markgomez3688
@markgomez3688 5 жыл бұрын
OMG!... This was hard to watch, first you left gold dust in the glass beaker. Then you blow the gold away with your gas torch, your gold losses must be high. If you sweep the floor you might get an ounce or two of gold at the end of the year off the floor......
@까망이-p6t
@까망이-p6t 5 жыл бұрын
Thank you for teaching me how to do this.
@rezaghafory9181
@rezaghafory9181 5 жыл бұрын
درود خیلی عالیه فقط خواهش میکنم اگه میشه اون موادهای که بهش اضافه می کنید اسمش زیرش بنویسید. خواهشن
@Zakaria-xr4jd4su2c
@Zakaria-xr4jd4su2c 2 жыл бұрын
I have a question? Did you get rid of nitric acid in aqua regia, before precipitation with zinc?
@joandotel4576
@joandotel4576 2 жыл бұрын
Hello friend, I would like to know where you can get sodium metabisulfite, I have it, but it doesn't work, I don't get the gold
@abdollahyosefzade6144
@abdollahyosefzade6144 3 жыл бұрын
To melt gold powder. What is the white material you sprayed ??
@10171981
@10171981 5 жыл бұрын
Ummm… so now if you use the zinc powder you have to use MORE nitric acid to separate the zinc from the gold powder instead of just using SMB which then would be your final step to get the gold mud into your coffee filter letting it dry and then melting the powder to make a gold bar.
@10171981
@10171981 5 жыл бұрын
Of course adding SMB AFTER you put in Urea so that it won't keep turning into liquid from due to the remaining nitric acid and hydrochloric acid continuously breaking it back down.
@dontbea7237
@dontbea7237 5 жыл бұрын
No what he is saying is smb cant remove 100% gold so after smb recovery he runs a second parsipatant to remove gold lost in solution with the zinc so instead of getting 95% or so hes squeezing out every bit by double extracting the same liquid
@wahyuekosudibyo6579
@wahyuekosudibyo6579 5 жыл бұрын
what zinc powder?
@tariqchowdhury7549
@tariqchowdhury7549 3 жыл бұрын
U spraying with the bottle, what is it?
@euphrem6514
@euphrem6514 10 ай бұрын
Can we use metal zinc to precipitate gold in aqua regia when SMB is in excess and the gold dissolve back in the solution
@bobbya.5489
@bobbya.5489 4 жыл бұрын
how about recovery Platinum ,Pd and Rhodium
@arunruengronghiranya6557
@arunruengronghiranya6557 3 жыл бұрын
I didn't understand the gold powder in the last step. It should be brown or black. After washing with nitric acid What color should the gold powder be?
@Dalanibarza
@Dalanibarza 7 ай бұрын
Hello, nitric acid and hydrochloric acid form acid. Does acid dissolve gold?
@MakeGold
@MakeGold 7 ай бұрын
Yes, a mixture of nitric acid (HNO3) and hydrochloric acid (HCl) can dissolve gold. This mixture is called aqua regia (Latin for "royal water"). The chemical process works as follows: 1) Nitric acid oxidizes the gold to form gold ions (Au+3). 2) Hydrochloric acid provides chloride ions (Cl-) which react with the gold ions to form a soluble chloroauric acid complex (HAuCl4). The overall reaction is: Au (solid) + HNO3 (aq) + 4HCl (aq) → HAuCl4 (aq) + NO (g) + 2H2O (l) This is one of the few ways to dissolve the relatively inert noble metal gold. Aqua regia is able to do so because of the combination of an oxidizing agent (nitric acid) and a complexing agent (hydrochloric acid providing chloride). Individually, neither nitric acid nor hydrochloric acid can effectively dissolve gold on their own. The mixture of the two acids is required for gold dissolution to occur efficiently. So in summary, yes the acid mixture formed from nitric acid and hydrochloric acid, known as aqua regia, is indeed able to dissolve and solubilize gold through a redox and complexation process.
@eminkr5215
@eminkr5215 2 жыл бұрын
Eritme potasını kendin mi? yaptın
@JoeHodge-r4e
@JoeHodge-r4e Жыл бұрын
If the zinc powder is so good as to get the final amount of gold why do you use the sodium meta bisulfite at all. Why not just use the zinc powder?
@nadjibtemizer1769
@nadjibtemizer1769 3 жыл бұрын
Even with out eliminating nitric acid??
@walidmahmoud3957
@walidmahmoud3957 4 жыл бұрын
Whey donot used NaoH before zanic powder here?when I can use Naoh
@waleedurrahman897
@waleedurrahman897 4 жыл бұрын
Can i contact you???
@mikelee5387
@mikelee5387 3 жыл бұрын
Your video is excellent. I have good content of pgm mix in iron ore. The ore obtained through gravity separation. How do i separate the base ore and take pgm out ?
@Diego-bf8es
@Diego-bf8es 4 жыл бұрын
My question is: This method is only for remaining gold contained on the neutralized aqua regia, isn't it?
@vimalaogeti79
@vimalaogeti79 4 жыл бұрын
I taken 75ml HCL 25ml Hno3 and add smb , urea but gold precipitate not come sir please tell me
@tbassumkhan2937
@tbassumkhan2937 4 жыл бұрын
Call me 8923433662
@mohammadusmani5351
@mohammadusmani5351 4 жыл бұрын
Dear you have done on Aqua regia residue , can we do it on complete Aqua regia ? Means in first recovery too ?
@vajrapunookaraju8153
@vajrapunookaraju8153 3 жыл бұрын
What is the powder you used when melting please say
@alaairagy832
@alaairagy832 5 жыл бұрын
What is the first mixture of kindness?
@v.mghircoias9046
@v.mghircoias9046 4 жыл бұрын
@archimedes channel - why 97.5% shouldn't it be 99.99 %??
@PreetyOfficial1
@PreetyOfficial1 3 жыл бұрын
hellow sir how to recover gold from aqua regia by use of arsenic sulphide plz upload ur video. thanks
@Blackstone8235
@Blackstone8235 2 ай бұрын
This from soil or phone board is!
@suharyanto831
@suharyanto831 5 жыл бұрын
Hello sir. I am a beginer. I want your advise to reduce the fog generated by aqua regia during pouring into the solution which is very dangerous. I really worry for it (my friend already lung infected caused it). How to minimize it, such that it can not spill of the beaker? Or it can be over come by using a dust collector to suct each of fog arise? Thanks before 🙏
@амирбектурабеков-и6н
@амирбектурабеков-и6н 5 жыл бұрын
Бул сайта қазақша сөелейтиндер барма не хрена не понель
@aaronholcombe2963
@aaronholcombe2963 4 жыл бұрын
Fucking flow hood. Wtf if not don't have people around if your gonna kill them
@حمزةبنصايل
@حمزةبنصايل Жыл бұрын
السلام عليكم ورحمة الله وبركاته كيف حالك يا. هل يممن. فديوهات كيف طرق فحص الاكاسيد الذهب والتبر في طرق سهله وشكرا
@amrendramishra545
@amrendramishra545 3 жыл бұрын
Can gold making possible by awuaragiaand zink
@asmarefendi7260
@asmarefendi7260 2 жыл бұрын
Are that Zinc Sulfat (ZNOSO4) or Zinc Oxide (ZNO)..? 🙏🙏🙏
@avelinoviana9444
@avelinoviana9444 2 жыл бұрын
No. It is metalic zinc. Its the reductor chemical form.
@orhangencebay1892
@orhangencebay1892 4 жыл бұрын
i dont understand my friend 1 Sodium floure and sodium clore??? 2 aqua regia remaining chemical 3 hot water please how make write me please
@abdollahyosefzade6144
@abdollahyosefzade6144 3 жыл бұрын
Hi, I have gold dust and I extract it with sodium cyanide, but I can not give it powder with sediment. Please help me. Thank you.
@Sanjaysahu-on7od
@Sanjaysahu-on7od 2 жыл бұрын
How much add zinc powder in a one liter of acuaregia solution
@CARLOSCESPEDESbiocihealth
@CARLOSCESPEDESbiocihealth 2 жыл бұрын
Good job
@amrendramishra545
@amrendramishra545 2 жыл бұрын
How possible zinc powder concert in gold by aquaregia
@ahmedzakari203
@ahmedzakari203 5 жыл бұрын
Pls. can you tell us what are the other chemicals you use before the zinc powder and what is zinc powder? Pls.
@moe3dprinting
@moe3dprinting 5 жыл бұрын
hydrochloric acid 35% and nitric acid 68 or 70% it will make aqua regia/ after gold melted then filterd then use smb sodium metabisulfite
@mustafaateeq2574
@mustafaateeq2574 2 жыл бұрын
Thank you very much 🥰🥰🥰🥰
@praveenpattar3070
@praveenpattar3070 3 жыл бұрын
How to recover gold from gold plating cynide sir?
@flexicone1913
@flexicone1913 5 жыл бұрын
Flexicone Know-How leaching technology. For the processing of refractory gold-bearing , sulphide and tellurides ores. Flexicone has developed a unique enrichment technology. The technology includes the processes by centrifugal gravity separation, oxidation of sulphides , extraction of gold and platinum group metals by leaching leaching of gold, silver and palladium.
@virendrajaiswal9822
@virendrajaiswal9822 4 жыл бұрын
When i melding zinc how many times I weight.
@جوادپهلوانی-ظ8ص
@جوادپهلوانی-ظ8ص 2 жыл бұрын
What the stanous test positive with a mininmoum gold in ppm??
@timc4690
@timc4690 4 жыл бұрын
What do you do with the waste chemicals
@Vt_rohit
@Vt_rohit 2 жыл бұрын
What is zinc powder
@whateversmurfette
@whateversmurfette 2 жыл бұрын
will this work to get the magnetic metals away from the gold in my solution? the gold won't drop because some steel got in there (i'm getting red sediment and silver sediment only)
@jjprospector9170
@jjprospector9170 3 жыл бұрын
How dose u get platinum an pladdum out
@hafeezullah6528
@hafeezullah6528 6 ай бұрын
Sir can you tell me the zinc name
@karlscraft6631
@karlscraft6631 4 жыл бұрын
Can this metode use in gold that contain gold?
@mecinfimate4316
@mecinfimate4316 5 жыл бұрын
Hi, where do you get the ingredients i.e eg the acids, its hard to get it in india, please let me know where can i get them in india.
@n.pisamoovung1822
@n.pisamoovung1822 4 жыл бұрын
You can buy it in online stores
@НиколайД-р1м
@НиколайД-р1м 4 жыл бұрын
What materials the crucible made of ?
@quintonharvey1501
@quintonharvey1501 2 жыл бұрын
Are you useing the nitric acid to get rid of zink and other metals
@MakeGold
@MakeGold 11 ай бұрын
yes
@MrHussain63
@MrHussain63 Ай бұрын
Very nice 💯 truth yield
@themateentube
@themateentube 3 жыл бұрын
Hey i do have gold paste how to restore to solid
@nano3643
@nano3643 5 жыл бұрын
តើ ទឹកនឹងជា ទឹកអី្វ.ហើយមានម្ស៊ៅអ្វីខ្លះ.???
@sanmugamk4995
@sanmugamk4995 Жыл бұрын
Hi sir my materials is second time rished that's haw very ppm type gold sir we are count see sir but I try MERIQURAi and sum chemical reaction but now use sir
@kunwarkantchaurasiya1106
@kunwarkantchaurasiya1106 2 жыл бұрын
एक्वारेजिया और गोल्ड के घोल में नमक जैसा कौन सा पाउडर डाला जाता है ?
@user-sonu643
@user-sonu643 Жыл бұрын
Nausadar
@ourodolixo-e
@ourodolixo-e 5 жыл бұрын
Muito bom, técnica diferente 👏👏👏
@angelol.afanador7674
@angelol.afanador7674 4 жыл бұрын
for anybody that can help me , how much water has to be added to solution? im a beginner please help thank you
@analielocquinio2886
@analielocquinio2886 2 жыл бұрын
plss help my gold dust not efect gold for mercury what process
@mapratama9
@mapratama9 4 жыл бұрын
what is the white powder in the end and before firing? ah and also what is the name of the last solution after the gold fired?
@deenislamkibaatein1714
@deenislamkibaatein1714 2 жыл бұрын
Borex
@laxmigautam5150
@laxmigautam5150 5 жыл бұрын
hlo sir. How to obtain gold when refinement is done by using only nitric acid.
@goodquick4374
@goodquick4374 4 жыл бұрын
Как избавиться от примесей, которые вносит цинк с золотом?
@jonathanbeleta1927
@jonathanbeleta1927 3 жыл бұрын
How to lock gold dase
@maryroselazaro2220
@maryroselazaro2220 3 жыл бұрын
What called powder you put before heating?
@suryasundar6541
@suryasundar6541 Жыл бұрын
Borax..
@salaheldenhossam1310
@salaheldenhossam1310 5 жыл бұрын
انت الافضل ✌✌💓
@MonaKarabash
@MonaKarabash 4 ай бұрын
علم.الخمياء.قديم.جدا.عنصر.في.فك.وتركب...زوج.زكر.انثي....
@fazalwahab8920
@fazalwahab8920 4 жыл бұрын
hi ..i am ur ubscriber sir how i extract copper from copper ore???
@asminarilwan2283
@asminarilwan2283 3 жыл бұрын
Hi sir which country you are
@mostafaelbadry758
@mostafaelbadry758 4 жыл бұрын
What if I used zinc oxide?
@craterglass
@craterglass 3 жыл бұрын
You'll make zinc chloride and zinc nitrate salts without reducing any of the gold still in solution. The pH of the solution will rise as free protons are consumed.
@tayyabkazmi1658
@tayyabkazmi1658 5 жыл бұрын
vary informativ and inspirin video
@bushraasim4596
@bushraasim4596 4 жыл бұрын
Kindly help me tayyab
@eduardocastaneda7994
@eduardocastaneda7994 4 жыл бұрын
Is this alchemy?
@chethanchethan4110
@chethanchethan4110 5 жыл бұрын
why didn't use 72% nitric acid
@moe3dprinting
@moe3dprinting 5 жыл бұрын
you can 68 or 70 is safe
@loveme6069
@loveme6069 4 жыл бұрын
Sir please sheyer all meterial
@josephpecoul6532
@josephpecoul6532 4 жыл бұрын
I like the video almost as much as gold
@SeputarEmas
@SeputarEmas 4 жыл бұрын
Zine powder belinya dimana ya? 👍👍
@nusretmanyaktar9280
@nusretmanyaktar9280 4 жыл бұрын
I SEND YOU A VERY IMPORTANT QUESTION COUPLE OF DAYS AGO......I UNDERSTAND YOU ARE VERY BUSY BUT I WOULD BE VERY PLEASENT IF YOU GONNA GIVE AN ANSWER ON MY QUESTION PLEASE.....I AM WAITING ...THANK YOU!!!
Dissolving Gold In Hot Aqua Regia
23:20
sreetips
Рет қаралды 71 М.
The Best Band 😅 #toshleh #viralshort
00:11
Toshleh
Рет қаралды 22 МЛН
⚠Gold Extraction From Aqua Regia | Gold Recovery
11:33
Gold Recovery
Рет қаралды 394 М.
Почему Эту СМЕСЬ хотят ЗАПРЕТИТЬ?
18:23
Gold Refining
13:22
Lithic Metals
Рет қаралды 185 М.
Cleaning Gold Precipitated From Dirty E-Waste Solutions
19:14
omegageek64
Рет қаралды 13 М.
Karat GOLD in Aqua Regia No Inquartation
26:44
sreetips
Рет қаралды 32 М.
Gold Recovery From Dirty Solutions
13:45
sreetips
Рет қаралды 97 М.
Silver Recovery from Watch Battery | Watch Battery Recycling | Silver Recovery
14:37