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Bohumil Graman
Bohumil Graman
Bohumil Graman
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I deal with the recovery of precious metals from electronic waste.

At work I use laboratory glass SIMAX www.simax.com
Rags  - Gold recovery
8:47
Год назад
Backplane boards - Gold recovery
17:54
Год назад
Dental scrap - Precious metals recovery
26:41
2 года назад
Ceramic ICs - Gold recovery
10:32
3 года назад
400 keyboards - Silver recovery
25:33
3 года назад
Airshow CHEB 2017
7:53
5 лет назад
URS male old type - Gold recovery
11:37
5 лет назад
URS female old type - Gold recovery
12:34
5 лет назад
URS connectors male - Gold recovery
14:44
6 лет назад
Gold melting - 1/4 kg (8 oz)
10:02
6 лет назад
Комментарии
@orange-dd5rw
@orange-dd5rw 8 дней назад
total chemicals used by liter list plz mister Bohmil Graman
@sashabelik9303
@sashabelik9303 14 дней назад
Спробуй перед плавкою стиснути осад в брекет ! За допомогою 2 поршнів від шприца вставлених в один корпус !
@aberagebretsadik4040
@aberagebretsadik4040 Месяц назад
Thank you sir ! I got good study !!
@PardeepSingh-sx9fw
@PardeepSingh-sx9fw Месяц назад
Nice yield and very informative video. One question remain what material is used for denox?
@ricardocrivellari1085
@ricardocrivellari1085 2 месяца назад
Mentiroso
@8bitrainbowdash
@8bitrainbowdash 2 месяца назад
Damn, I wish I could do this at home, have a bunch of cpus and work at a electronics scrap place, but I do not have the rom for the fumes or risks.
@radiocomponent
@radiocomponent 2 месяца назад
Sodium pyrosulfite (Na2S2O5) stimulates the development of allergic reactions and causes diseases of the gastrointestinal tract. Releases toxic gas on contact with acids. If in contact with eyes, may cause eye damage. But this does not prevent this chemical compound from not only releasing gold from solution, but also being a food additive E223. Пиросульфит натрия (Na2S2O5) стимулирует развитие аллергических реакций, вызывает заболевания желудочно-кишечного тракта. При контакте с кислотами выделяет токсичный газ. При попадании в глаза может вызвать повреждение глаз. Но это не мешает этому химическому соединению не только выделить золото из раствора, но и быть пищевой добавкой Е223.
@user-yu5ol5vz7q
@user-yu5ol5vz7q 2 месяца назад
Лайк тебе и подписка 👍🔥
@SunRabbit
@SunRabbit 2 месяца назад
Podle mne jste nedostal vsechno Stribro hned pri prvnim postupu. Na tech folii nema spravne zustat nic krome nepatrnyho a pruhlednyho stinu tech puvodnich nanosu. Ja jsem videl video kdysi davno kde pouzival varici kyselinu dusicnou aby docilil prave toto. Mimo jiny, KDE jste sehnal dusicnou? Ja mam folie z asi 1000 klavesnic (bedna asi 60 x 40 x 40) a ja asi to cely spalim, pak odstranim ten popel s tetrachlorem, pak to vyredukuju elektrolyticky. Jeste se ale musim poradit s jednim profesorem chemie ohledne nejlepsiho postupu.
@YourDailyVideoNews
@YourDailyVideoNews 2 месяца назад
Great video ‼️‼️
@coinkiller5495
@coinkiller5495 2 месяца назад
And it will go green and you can reuse it time and time again if slowdowns just add some more HC it will go dark green and put all kinds of boards in with gold flashing on it floats of and strain gold off and do it again and again put gold fingers in and over night gold floats of copper chloride two it’s called
@coinkiller5495
@coinkiller5495 2 месяца назад
AP is hydrochloric acid and food grade peroxide for shop put 50 mill in 2 litres of hc
@YourDailyVideoNews
@YourDailyVideoNews 2 месяца назад
Cool Video - please do more 👍👍👍
@IsmetBiljali-vg4hu
@IsmetBiljali-vg4hu 2 месяца назад
Perfect
@IsmetBiljali-vg4hu
@IsmetBiljali-vg4hu 2 месяца назад
Very nice work
@andrebattis9410
@andrebattis9410 2 месяца назад
Good job
@andrebattis9410
@andrebattis9410 2 месяца назад
Second AR you should added sulfuric acid to dissolve tin or lead
@patrick8198
@patrick8198 3 месяца назад
24k pure nice gold ❤😂
@patrick8198
@patrick8198 3 месяца назад
Wow!👀🤩….. That is a nice lick👅❤️😂
@vanquynguyen8298
@vanquynguyen8298 3 месяца назад
Hơn 1 kg các chân mạ vàng này ta thu được 6,5 g vàng , cũng nhiều hơn so với lượng vàng có trong IC thông thường ( không kể những con chip máy tính ) ?
@patrickwilliams4613
@patrickwilliams4613 3 месяца назад
Nice video good job
@knowldedge5012
@knowldedge5012 3 месяца назад
how do you separate capacitors from the pins?
@okboomer6201
@okboomer6201 4 месяца назад
Next time talk a bit so we know WTF you are doing
@ScienceInspiration-ot1le
@ScienceInspiration-ot1le 4 месяца назад
Hello can i know whats mean denox mean .if use any chemical for denox
@goldandsilverminingintheci8942
@goldandsilverminingintheci8942 4 месяца назад
I once did a small moving job for a handful of gold crowns. Worked for me!
@coinkiller5495
@coinkiller5495 5 месяцев назад
One thing bro you had to denox?? How much nitric did you use?? If you start with few mills at a time on heat and with lid on reaction stops put few more mills in until it’s resolved and the more legs you remove before you start you will use less nitric because copper takes a lot of nitric and the more copper you need more liquid to dissolve the salts in but good job we’re is the water for SMB you drop gold you need double solution water???????
@coinkiller5495
@coinkiller5495 5 месяцев назад
Hi moose coin killer from Australia here what I do with my chips first is I put in AP for few weeks or so and it eats all the magnetics out of the chips all the way up and inside 85% so less to eat away with expensive nitric great video should try it out and make a video on it
@YourDailyVideoNews
@YourDailyVideoNews 2 месяца назад
What is AP ?
@NanamiKairyu
@NanamiKairyu 5 месяцев назад
sulfic acid should be like 96% atleast 86 will not work actually(only little bit). It's long time taking, dangerous, also usage of acid is high. Only one bonus that gold not lost in the process like you can do when burning.
@user-db9yv7lu9v
@user-db9yv7lu9v 5 месяцев назад
I think too much that the gold and pal from 7.5g (0.2g and 0.44?)
@lukasrosko1480
@lukasrosko1480 5 месяцев назад
Chapem to spravne 200g pinou a jeden g zlata ? Cca 30e +- ?
@ezatsheshtawy9766
@ezatsheshtawy9766 5 месяцев назад
Excellent ❤ ‏‪nice time
@otorejthar3474
@otorejthar3474 5 месяцев назад
Hi Bohumil,I have question. How long did you soak the plates for? In your first step
@BohumilGraman
@BohumilGraman 5 месяцев назад
Until all the metals are etched away.
@otorejthar3474
@otorejthar3474 5 месяцев назад
How I can you contact (pm)? FB or something. I need your help
@otorejthar3474
@otorejthar3474 5 месяцев назад
How I can contact you private? Can you give me email? I have any more questions.
@henrykmielczarek3189
@henrykmielczarek3189 6 месяцев назад
Jaki sens ważyć z metalem w 0,55 min.
@BohumilGraman
@BohumilGraman 5 месяцев назад
Abych měl alespoň přibližnou představu, kolik HNO3 budu potřebovat.
@user-lm5ix3ce5l
@user-lm5ix3ce5l 6 месяцев назад
I feel like this was not done as efficient as possible. 99 cpus and only 0.6 grams of gold?!
@BohumilGraman
@BohumilGraman 5 месяцев назад
Yes :-)
@spanek158
@spanek158 6 месяцев назад
Paráda. A tu indukční pícku jste si dělal? Roztaví i zlato?
@user-lm3nd5ow9j
@user-lm3nd5ow9j 6 месяцев назад
How much urea used in one litre aqua regia
@BohumilGraman
@BohumilGraman 5 месяцев назад
As much as removes the remaining nitric acid. You know how much is left?
@henrykmielczarek3189
@henrykmielczarek3189 7 месяцев назад
Liczyłem na ok 12 g
@BohumilGraman
@BohumilGraman 6 месяцев назад
Je to mix, záleží na podílu zlacených a nezlacených tranzistorů.
@fightington
@fightington 8 месяцев назад
Anything with a high frequency of contacting - look for platinum/paladium- its used cause it doesnt wear out like gold/silver - lasts a lot longer
@BohumilGraman
@BohumilGraman 7 месяцев назад
No Pd Pt, I tested it...
@Edward-ju1vj
@Edward-ju1vj 8 месяцев назад
There is no way he got that much from 1kg. You get more like 1 gram. I'm not sure exactly where but he spiked it somewhere along the line there's no way you can get that much from 1 kg!!!!
@BohumilGraman
@BohumilGraman 8 месяцев назад
Another smart guy without a single experience with these connectors, but who knows exactly what is or is not possible. Get them (the type is there) and then judge. Feel free to make your own video exposing me. In the Eastern Bloc, they used to make gold plated pins like that a lot. There are richer pins.
@Edward-ju1vj
@Edward-ju1vj 8 месяцев назад
Lucky that the pin rack wasnnot glued to the board... I've never seen that.
@BohumilGraman
@BohumilGraman 8 месяцев назад
In the vast majority of cases, it's not glued.
@stefanzivkovic714
@stefanzivkovic714 8 месяцев назад
Nice video sir, can you tell me, how many karats did you get, what is the purity of this gold you made?
@BohumilGraman
@BohumilGraman 8 месяцев назад
24
@lukasbaumgartner4303
@lukasbaumgartner4303 8 месяцев назад
STO ROKOV KEĎ TO TAKTO BUDETE ZÍSKAVAŤ TAK MÁTE 20g zlata a nič z toho zabitý čas ale Číňania a pakistanci a Indovia majú čas na ťažbu zlata 😂😂😂😂😂😂😂😂😂😂
@BohumilGraman
@BohumilGraman 8 месяцев назад
Fakt? Koukám profík :-) Určitě máte pravdu, jsem rád, že si to myslíte. :-)
@lukasbaumgartner4303
@lukasbaumgartner4303 8 месяцев назад
@@BohumilGraman a vy tomu ešte veríte 😂😂😂😂 vlastne youtube ma vždy pravdu 😂😂😂😂😂
@BohumilGraman
@BohumilGraman 8 месяцев назад
@@lukasbaumgartner4303 :-) Tohle není otázka víry ;-)
@MuzzammilHussainQureshi-qs1ix
@MuzzammilHussainQureshi-qs1ix 8 месяцев назад
If there is 6 kg with finger then what will be the average with Ram?
@BohumilGraman
@BohumilGraman 7 месяцев назад
I not understand you question
@Janezhallam
@Janezhallam 8 месяцев назад
need gas mask with full face protection and rubber gloves, and also a environment suit.
@akgoldbear7669
@akgoldbear7669 8 месяцев назад
I thought there was something wrong with my computer. The playback speed needs to be increased by 1.25. Will there be another part of the video about the palladium that was in your beaker? 😎
@BohumilGraman
@BohumilGraman 8 месяцев назад
I tested it with DMG - no Pd :-(
@quinton3997
@quinton3997 8 месяцев назад
Hard to believe there's that much gold in them
@BohumilGraman
@BohumilGraman 8 месяцев назад
But its...
@devendraramnivasbaiddevend1763
@devendraramnivasbaiddevend1763 8 месяцев назад
Not clear t in this video
@BohumilGraman
@BohumilGraman 8 месяцев назад
What is not clear?
@devendraramnivasbaiddevend1763
@devendraramnivasbaiddevend1763 8 месяцев назад
Fake video
@BohumilGraman
@BohumilGraman 8 месяцев назад
No :-) My video is not only one on RU-vid with this material.
@johannbackhus858
@johannbackhus858 8 месяцев назад
Na konci pisete vynos z urs az 30g/kg. V inych videach uvadzate cca 9g/urs. Ktore typy su tak vynosne prosim? Dakujem a drzim palce 🙏🏻
@BohumilGraman
@BohumilGraman 8 месяцев назад
To kdybych tušil, vždy je to překvapení :-)
@johannbackhus858
@johannbackhus858 8 месяцев назад
@@BohumilGraman asi vtedy galvanizovali od oka a majster ked si odbehol na kafe,tak teraz mame o to vacsiu radost 😎
@ayhamhafez285
@ayhamhafez285 9 месяцев назад
What is the idea from using the mentioned recipe to get rid off tin rather than using only HCl? I soak pcb in HCl with very good results,but I wonder why you use nitric and citric recipe,is there any advantage?
@BohumilGraman
@BohumilGraman 9 месяцев назад
Po použití HCL je nutný mnohonásobný oplach, který v tomto případě zcela odpadá.