Thank you for demonstrating such a detailed step by step explanation of various processes for precious metal extraction from ore. Anyone wanting to learn could use your videos as a starting point.
Excellent. You performed very well. But it was not necessary to add lead, and I think you added lead because the gold was accompanied by cotton, so that the gold would not be wasted in the heat with the cotton. Thank you, dear colleague. Looking forward to our other work
I am very happy to see someone who is proficient and distinguished in what he does. I applaud you for this wonderful effort. In this regard, I would like to draw your attention to the electrolysis of metals and mixing them with salts such as sea salt and placing copper electrodes at a specific voltage, for example 12 volts, 3 volts, or 1.5 volts. Leaving it to produce results from this solution, transforming them, precipitating them, and melting them so that we can see what this new birth is. This is just an example of many options that are likely to result in amazing things. It is just working for pleasure and thinking about God’s creation in this great universe. I greet you again, wonderful person. I am following you from the Kingdom of Saudi Arabia
That was fun to watch but also innerving! Drips of gold on table, gold dust left on fingers of gloves :) Everything you do will have losses. The trick is to rinse the gold down with some extra water after doing the drop&filter. That way you don't have to fiddle with dry gold sticking to everything you touch it with.
A better way I have found is to let the precipitate completely drop overnight. Carefully decant without disturbance with a syringe. Rinse with distilled water, allow to settle and decant again. Using the least amount of distilled water wash it into a clean, glazed crucible. Allow to settle, decant crucible with syringe or dry paper towel. Heat gently around the outside to drive out remaining moisture. Melt. It's a bit fiddly and takes longer however the gold never leaves the beaker, theres no filter to rob you and you don't get any losses, provided you heat the crucible as described.
@@snoddyification Yes that is a very nice method. Sometimes when I work with very small quantities of gold I will settle in a Pear Shaped Flask held in a stand. This focuses the gold into a small point in the bottom and it is easy to pipette out the gold into a smaller collection flask or into a crucible for melting. After the initial pipetting I can swirl the content and leave a few mins and if anything was missed it immediately collects in bottom again. These flasks are also great for using just HCL with chlorine bubbler to dissolve the gold as the bubbler will inject the gas at the lowest point in the flask. Benefit is no need to source nitric and no residual nitric.
@@1kreature Cool. I have that equipment but haven't heard of that method. So thanks for the tip. I have no issue obtaining nitric 20l at a time and have a fume hood so I am pretty lucky. I also only deal with small gold quantities at a time. Tonight I precip with vitamin c for the first time and think it might be preferable to smb from toxicity point of view. I haven't any clue whether yeild will suffer though. Instead of scientific beakers i buy used coffee plunger pots from the opshops. They are thinner walled but I put a pyrex dish underneath on the electric hotplate and land them on cork when coming off the heat, haven't broken one yet. Thanks for sharing, I will look into what you said. Cheers.
@@snoddyification Lucky you. Here Nitric Acid is a controlled substance. I have used Potassium metabisulfite for precip successfully here as it is readily available for winemaking while almost nobody sells the sodium based stuff. The odd thing about PMB vs SMB is the high density making it "just different" to use. (PMB is 2.34 g/cm³ while SMB is 1.48 g/cm³)
Your channel was YT suggested. Watching both Part 1 & 2 was entertaining to say the least. You brought back some fond memories when we were heavily involved with 'benchmarking'. Curious though why not have a local University with its materials science department use their SEM and/or X-ray Diffraction equipment to qualitate and quantitate the ore samples? Understandable if it's cost prohibitive. P. S. Of the 100s chemicals available there was only one we purchased from Australia (from the beach), namely Rutile b/c of its low Magnetite and Hematite levels. Cheers from sunny Florida.
Hello from Los Angeles. So far, I haven't found interest in the subject locally. One of the reasons that I now do my own assays is the expense and long lead times to do assays at professional companies. There is an individual who will assay for gold and silver but I haven't tried him, but I should.
Best way to filter fine silt like that is to just let the solution sit for a few hours or days. Either that or a centrifuge, but those are expensive and can't process much volume.
3 carefully applied tests. 3 completely different results. Maybe try panning the gold off next time prior to any further treatment. Or some sort of density separation process like a miller table.
Greetings Very good work, a clarification I would like to know if this procedure helps me separate the gold from the tellurium, I have gold in a mineral sample called silvanite and I cannot separate the gold by fusion, this procedure developed in the video can help me separate gold or maybe there is another process
Greetings. Unfortunately, I don't know anything about separating gold from Tellurium. You can try searching the RUclips channel called Poor Miners. I know he has a video on this subject. Good Luck!
@@orophilia When you neutralize your acid with a base to raise the pH to around 8, any precious metal complexes in the solution will precipitate, allowing you to further refine these salts. However, your fire assay technique needs improvement, as the results are still significantly off. Unfortunately, it looks like you might deplete the ore body before perfecting it, but you should still retain everything that hasn't vaporized. For instance, you can test the remaining solution for impurities using NaOH. Titration can be used to determine the purity of a substance. In this context, titration is employed to measure the concentration of a specific component in a sample. By precisely quantifying the amount of a known reagent needed to react with the target component, you can calculate its concentration, and thereby assess the purity of the sample. For example, in the case of an acid-base titration, if you know the exact concentration of your titrant (e.g., NaOH) and you titrate it against an impure acidic solution, the amount of titrant required to neutralize the acid allows you to determine the concentration of the acid. If you compare this with the expected concentration for a pure sample, you can infer the purity of the original substance. Titration is a powerful method in various fields, such as pharmaceuticals, to ensure that the active ingredients meet strict purity standards. This is assuming you want to refine your processes, because most people will be more than happy with 40-50 ounces per metric ton. ~ Be safe, and have fun
I prefer iron sulphate as a precipitant, especially on a first refine. Precipitation with stannous chloride produces gold stannate which is more difficult to extract and refine again. Converting to sodium stannate is required to get gold from gold stannate.
Gracias por tu comentario. Si, tengo un embudo Buchner que también utilizo para filtrar, pero cuando quiero copelar el material utilizo un algodón. Un abrazo.
Interesting video. My questions could tap water have caused a reaction in your gold bearing solution. Or would it just react with silver present. And also to kill off the nitric, couldn't you have boiled it off? Anyway thank for the video!
I don't think the chlorine ions in tap water makes a difference since we're using HCl anyway, but I'm not a chemist and best practice would be to use DI water. Yes, I could have boiled off the HNO3, but that takes more patience than I have. :-)
When you're dropping out the Gold from solution you might want to add ice cubes. As the chemical process works it heats the solution. Allowing the Gold to go back into solution. I also didn't see you check the remainder of the liquid. You should have no Gold in the solution. Another suggestion is not filtering when washing the Gold because Gold is now in your filter. Adding to your lost Gold. Source from watching Sweetips.
Man I really blew my AR process by not taking out the iron or deNOXing it before I added FAR TOO much SMB and I have all these layer's of silver?gray colored stuff, a huge amount of yellow stuff, and then a dark layer and then all the leftover material at the bottom... then I tried to melt some aluminum in my furnace and it didn't melt at over 2100F... how do I start over and all this crap is stuck in my crucible...ugh...so many people doing it so many way's I just got overwhelmed and some skip step's or don't tell you what they did during the cut in the vid. I know my Cape Disappointment blue/black sand's are rich in gold and other PM's in smaller quantities but until I saw your 1st vid. with the Chapman's and other flux recipe I think that was you but I'm at a loss as I am just learning, it's taken me quite a long time to get all the equip. and chem.s and everything and I don't know if it's the double port propane furnace not getting enough oxygen but I've done 3 before and it worked ok but what do I do with all of that...I know there's gold as I tested some with Stannous Chloride and I gotta get the vacuum flask and pump cause it take's way too long and I was just taking out the maple colored syrup on this last filtration but it's gonna need a few more filtration's as even just the liquid after 500 ml is barely filtering but was pouring out at 1st... such is life, if you have any suggestions or schooling beside's what you've wonderfully presented in these 2 vid's I'd be very grateful
If you have free mill gold then it will dissolve in HCl + HNO3, even at fairly low concentrations. If the gold is inside sulfide crystals then it won't dissolve so easily.
16:35. "So, all of the gold should be in the cupel"... or on the table and ground. I really like the channel, but that was a little sloppy. Why not a tray underneath? I mean no disrespect. Quite the contrary, i have quite a bit of respect. I'm just pointing out possible failure points. Thanks for sharing
Take that sludge… dry it… and then put into crucible… melt the “dried sludge” …. And pour into a bar mold. You might be surprised… At 13:00min you had a sludge-free solution… which means that anything precipitated is pure gold. Just a quick tip… use your SMB to drop it out… use a piece of filter paper or something like that (held by tweezers)… dip into the solution, then hold it to the side and use your Stannous dropper to drip onto it… if it’s black… add more SMB… if no change… all gold is gone… time to rinse your sludge - the sludge is your gold!! I hope you didn’t toss that sludge!! You should’ve gotten WAAAAAY more gold from that amount of precipitate. I hope you see this!!
Thank you for demonstrating such a detailed step by step explanation of various processes for precious metal extraction from ore. Anyone wanting to learn could use your videos as a starting point.
Like an old friend once said: " ..anyone can buy paint, but it takes practice to be a painter."
LOVE IT.
Great video again Dave, I learn something new every time I watch your videos
Thanks, Geoff!
Thank you for the follow up video and explanations👍😁
Excellent. You performed very well. But it was not necessary to add lead, and I think you added lead because the gold was accompanied by cotton, so that the gold would not be wasted in the heat with the cotton. Thank you, dear colleague. Looking forward to our other work
Great demonstration my friend!
Awesome job!
Great results nice demonstration
I talked to Pete and he said he accidentally crushed and sent you a specimen that his friend sent him lol. Very rich ore there though!
Then I crushed it much finer! So much for the specimen.
So which mine did it come from?
Oopsie.
And we thank you also Pete and Dan.
I am very happy to see someone who is proficient and distinguished in what he does. I applaud you for this wonderful effort. In this regard, I would like to draw your attention to the electrolysis of metals and mixing them with salts such as sea salt and placing copper electrodes at a specific voltage, for example 12 volts, 3 volts, or 1.5 volts. Leaving it to produce results from this solution, transforming them, precipitating them, and melting them so that we can see what this new birth is. This is just an example of many options that are likely to result in amazing things. It is just working for pleasure and thinking about God’s creation in this great universe. I greet you again, wonderful person. I am following you from the Kingdom of Saudi Arabia
Thank you so much. Greetings from Los Angeles
Thanks for part two
That was fun to watch but also innerving!
Drips of gold on table, gold dust left on fingers of gloves :) Everything you do will have losses.
The trick is to rinse the gold down with some extra water after doing the drop&filter. That way you don't have to fiddle with dry gold sticking to everything you touch it with.
A better way I have found is to let the precipitate completely drop overnight.
Carefully decant without disturbance with a syringe.
Rinse with distilled water, allow to settle and decant again.
Using the least amount of distilled water wash it into a clean, glazed crucible.
Allow to settle, decant crucible with syringe or dry paper towel.
Heat gently around the outside to drive out remaining moisture.
Melt.
It's a bit fiddly and takes longer however the gold never leaves the beaker, theres no filter to rob you and you don't get any losses, provided you heat the crucible as described.
@@snoddyification Yes that is a very nice method. Sometimes when I work with very small quantities of gold I will settle in a Pear Shaped Flask held in a stand. This focuses the gold into a small point in the bottom and it is easy to pipette out the gold into a smaller collection flask or into a crucible for melting. After the initial pipetting I can swirl the content and leave a few mins and if anything was missed it immediately collects in bottom again. These flasks are also great for using just HCL with chlorine bubbler to dissolve the gold as the bubbler will inject the gas at the lowest point in the flask. Benefit is no need to source nitric and no residual nitric.
@@1kreature Cool.
I have that equipment but haven't heard of that method. So thanks for the tip.
I have no issue obtaining nitric 20l at a time and have a fume hood so I am pretty lucky.
I also only deal with small gold quantities at a time.
Tonight I precip with vitamin c for the first time and think it might be preferable to smb from toxicity point of view. I haven't any clue whether yeild will suffer though.
Instead of scientific beakers i buy used coffee plunger pots from the opshops.
They are thinner walled but I put a pyrex dish underneath on the electric hotplate and land them on cork when coming off the heat, haven't broken one yet.
Thanks for sharing, I will look into what you said.
Cheers.
@@snoddyification Lucky you. Here Nitric Acid is a controlled substance.
I have used Potassium metabisulfite for precip successfully here as it is readily available for winemaking while almost nobody sells the sodium based stuff.
The odd thing about PMB vs SMB is the high density making it "just different" to use. (PMB is 2.34 g/cm³ while SMB is 1.48 g/cm³)
Thank You, that bright fusion flash was very cool to see!
Your channel was YT suggested. Watching both Part 1 & 2 was entertaining to say the least. You brought back some fond memories when we were heavily involved with 'benchmarking'. Curious though why not have a local University with its materials science department use their SEM and/or X-ray Diffraction equipment to qualitate and quantitate the ore samples? Understandable if it's cost prohibitive.
P. S. Of the 100s chemicals available there was only one we purchased from Australia (from the beach), namely Rutile b/c of its low Magnetite and Hematite levels.
Cheers from sunny Florida.
Hello from Los Angeles. So far, I haven't found interest in the subject locally. One of the reasons that I now do my own assays is the expense and long lead times to do assays at professional companies. There is an individual who will assay for gold and silver but I haven't tried him, but I should.
Best way to filter fine silt like that is to just let the solution sit for a few hours or days.
Either that or a centrifuge, but those are expensive and can't process much volume.
Clays adsorb a lot of ions so make sure to wash clays very well.
muy detallado, muy bueno. la mano no estorba para nada
A lot of spillage. Plastic funnel is not good , gold sticks to it. Great video very well done and informative.Thank you..
Yeah, your right. Thanks for the comment!
3 carefully applied tests.
3 completely different results.
Maybe try panning the gold off next time prior to any further treatment.
Or some sort of density separation process like a miller table.
Yes, that's the learning experience. However, I've found significant variation in professional assays. It's not so simple.
@@orophilia It certainly does not look simple.
I would hate to spend Large funds based on 24 grams per ton and then only realize 7.5 grams per ton.
Greetings
Very good work, a clarification I would like to know if this procedure helps me separate the gold from the tellurium, I have gold in a mineral sample called silvanite and I cannot separate the gold by fusion, this procedure developed in the video can help me separate gold or maybe there is another process
Greetings. Unfortunately, I don't know anything about separating gold from Tellurium. You can try searching the RUclips channel called Poor Miners. I know he has a video on this subject. Good Luck!
@@orophilia thank you so much
Looks like a better result. 😎
I'm slowly learning. Thanks.
@@orophilia When you neutralize your acid with a base to raise the pH to around 8, any precious metal complexes in the solution will precipitate, allowing you to further refine these salts. However, your fire assay technique needs improvement, as the results are still significantly off. Unfortunately, it looks like you might deplete the ore body before perfecting it, but you should still retain everything that hasn't vaporized. For instance, you can test the remaining solution for impurities using NaOH.
Titration can be used to determine the purity of a substance. In this context, titration is employed to measure the concentration of a specific component in a sample. By precisely quantifying the amount of a known reagent needed to react with the target component, you can calculate its concentration, and thereby assess the purity of the sample.
For example, in the case of an acid-base titration, if you know the exact concentration of your titrant (e.g., NaOH) and you titrate it against an impure acidic solution, the amount of titrant required to neutralize the acid allows you to determine the concentration of the acid. If you compare this with the expected concentration for a pure sample, you can infer the purity of the original substance.
Titration is a powerful method in various fields, such as pharmaceuticals, to ensure that the active ingredients meet strict purity standards.
This is assuming you want to refine your processes, because most people will be more than happy with 40-50 ounces per metric ton.
~ Be safe, and have fun
I prefer iron sulphate as a precipitant, especially on a first refine. Precipitation with stannous chloride produces gold stannate which is more difficult to extract and refine again. Converting to sodium stannate is required to get gold from gold stannate.
Great comment. I'm going to try a series of experiments and I'll add iron Sulfate to the list.
Aqueles discos de filtro de papel te ajudariam na filtragem a vácuo. Um abraço.
Gracias por tu comentario. Si, tengo un embudo Buchner que también utilizo para filtrar, pero cuando quiero copelar el material utilizo un algodón. Un abrazo.
Interesting video. My questions could tap water have caused a reaction in your gold bearing solution. Or would it just react with silver present. And also to kill off the nitric, couldn't you have boiled it off? Anyway thank for the video!
I don't think the chlorine ions in tap water makes a difference since we're using HCl anyway, but I'm not a chemist and best practice would be to use DI water. Yes, I could have boiled off the HNO3, but that takes more patience than I have. :-)
@orophilia Thanks for the response. Any and all knowledge is useful. At some point, I will try some chemical refining. After studying of course.
Hey sir, of course, due to the interruption of the video, we did not understand where the second sample entered the test?
The second sample was prepared exactly like the first sample, from the same ore. -- Dave
When you're dropping out the Gold from solution you might want to add ice cubes. As the chemical process works it heats the solution. Allowing the Gold to go back into solution. I also didn't see you check the remainder of the liquid. You should have no Gold in the solution. Another suggestion is not filtering when washing the Gold because Gold is now in your filter. Adding to your lost Gold. Source from watching Sweetips.
Are you going to test those sulphides for gold?
Yes, there are lots of videos on the list. Thanks.
Man I really blew my AR process by not taking out the iron or deNOXing it before I added FAR TOO much SMB and I have all these layer's of silver?gray colored stuff, a huge amount of yellow stuff, and then a dark layer and then all the leftover material at the bottom... then I tried to melt some aluminum in my furnace and it didn't melt at over 2100F... how do I start over and all this crap is stuck in my crucible...ugh...so many people doing it so many way's I just got overwhelmed and some skip step's or don't tell you what they did during the cut in the vid. I know my Cape Disappointment blue/black sand's are rich in gold and other PM's in smaller quantities but until I saw your 1st vid. with the Chapman's and other flux recipe I think that was you but I'm at a loss as I am just learning, it's taken me quite a long time to get all the equip. and chem.s and everything and I don't know if it's the double port propane furnace not getting enough oxygen but I've done 3 before and it worked ok but what do I do with all of that...I know there's gold as I tested some with Stannous Chloride and I gotta get the vacuum flask and pump cause it take's way too long and I was just taking out the maple colored syrup on this last filtration but it's gonna need a few more filtration's as even just the liquid after 500 ml is barely filtering but was pouring out at 1st... such is life, if you have any suggestions or schooling beside's what you've wonderfully presented in these 2 vid's I'd be very grateful
Yeah, man, I feel your pain. Been there. I'm a persistent SOB, so we'll keep at it.
Hello sir, I wanted to know if the sample was sulfurized or not
I don't know what you mean by "sulfurized".
burning sulfur
clear sulfur with fire Before testing the sample
Hello, I wanted to know if the sample was desulfurized before the test?
No, I didn't roast the ore or apply any chemicals not shown in the video.
I have tried exactly what is in the video but the gold cannot dissolve... do HCL and HN03 have to be concentrated and pure, please explain, teacher
If you have free mill gold then it will dissolve in HCl + HNO3, even at fairly low concentrations. If the gold is inside sulfide crystals then it won't dissolve so easily.
There are limits. It can't be extremely dilute.
What’s the point of doing all this work when a fire essay was much more accurate and WAY faster?
Can we do accurate assays without smelting? How do we extract as much gold as possible from ore?
To figure out the best way to economically process large quantities of ore.
Blick. Now assay for silver
16:35. "So, all of the gold should be in the cupel"... or on the table and ground. I really like the channel, but that was a little sloppy. Why not a tray underneath? I mean no disrespect. Quite the contrary, i have quite a bit of respect. I'm just pointing out possible failure points. Thanks for sharing
Yeah, good technique is important.
Dude.. what did you do with the sludge you dropped out of solution with the SMB??
Take that sludge… dry it… and then put into crucible… melt the “dried sludge” …. And pour into a bar mold. You might be surprised…
At 13:00min you had a sludge-free solution… which means that anything precipitated is pure gold.
Just a quick tip… use your SMB to drop it out… use a piece of filter paper or something like that (held by tweezers)… dip into the solution, then hold it to the side and use your Stannous dropper to drip onto it… if it’s black… add more SMB… if no change… all gold is gone… time to rinse your sludge - the sludge is your gold!! I hope you didn’t toss that sludge!! You should’ve gotten WAAAAAY more gold from that amount of precipitate. I hope you see this!!
Yeah, I got all the gold this time.