Determination of SMBS addition into the Aqua regia solution

[4metals]

This link https://goldrefiningforum.com/threads/consolidation-of-loss-gold-thread.31119/
Is to a thread that was started and then deleted by a refiner using an Emak system tumbler plant. When he finally convinced his partners to share information to get help we were able to recreate what he deleted and continue on to help him. I believe the system he has is what you have or similar, is this true?

While this thread may not help you because you are not running karat scrap, it is an example of how helpful this forum can be for those who participate fully.

 

[Chemlab]

e mak makes many different machines and each have a specific purpose. Do you have a tumbler system? The tumbler plant is made specifically for hi grade karat gold refining and not e-scrap. E mak also has systems for e-scrap processing which is largely smelting and electrolytic copper recovery. Which specific equipment do you have in your shop now?

WE HAVE RRM25 MACHINE FROM EMAK, THIS IS BASED ON HYDRO METALLURGY BASED, USING AQUA REGIA, BOTH HCL AND NITRIC ACID TANKS ATTACHED, 4 WET COLUMN SCRUBBERS AND 3 SETTLEMENT TANKS, THIS IS OUR SYSTEM USING.

 

[FrugalRefiner]

I'm guessing your Cap Lock got stuck on. Please try to avoid that. It's very hard on my eyes.

Dave

 

[4metals]

So you have one of these? This is the digestion vessel working. I assume you refine a good amount of karat or doré gold? Actually I hope you do because that is what this system is made to process.

If you want to process e-scrap this is not the way to go.

 

[4metals]

I am familiar with these systems and I have worked with them. They are primarily designed so you can tilt and empty the contents of the tumbler into the filter system seen at the end of the video. If I had known this video could be used for this purpose at the time I would have videoed the emptying of the cylinder as well. With karat gold or doré gold the insolubles pour out easily and can be rinsed into the filter.

I believe the RRM 25 is designed to process 25 kg of gold alloy. That translates into about 100 liters of aqua regia capacity. If you were to fill the tumbler with ram processors and IC chips the volume of insoluble parts after digestion will be quite large in volume and if you were to use standard 3:1 aqua regia you would have used way too much nitric to do the job. And you will likely have digested enough base metals to force some digested gold out of solution to be mixed in with the insoluble portion. This is why aqua regia is not used for this process. In addition, to allow the chemistry to contact all of the gold, the parts are typically granulated before processing to expose as much of the precious content as possible.

If it were me, this is a perfect option for smelting and electrolytic copper cells. In fact that is exactly what Emak should have told you because they sell equipment for that process as well.

There is a possibility you could use the tumbler function for either Hydrochloric Acid and strong peroxide to dissolve the gold and filter the solution and process it for the gold in your cementation tank but that process may be better advised by members using the chemistry I just mentioned to dissolve exposed Gold on e-scrap. But your equipment is overkill for that process.

You can consider cyanide stripping the granulated parts and recovering the Gold with zinc and eventually cleaning up the gold by refining it in your Emak machine, but it will take a lot of cyanide stripping to fill a machine with a 25 kg capacity!

I am at a loss to figure out why the system you have was recommended for processing ram and IC chips.

 

[Chemlab]

I am familiar with these systems and I have worked with them. They are primarily designed so you can tilt and empty the contents of the tumbler into the filter system seen at the end of the video. If I had known this video could be used for this purpose at the time I would have videoed the emptying of the cylinder as well. With karat gold or doré gold the insolubles pour out easily and can be rinsed into the filter.

I believe the RRM 25 is designed to process 25 kg of gold alloy. That translates into about 100 liters of aqua regia capacity. If you were to fill the tumbler with ram processors and IC chips the volume of insoluble parts after digestion will be quite large in volume and if you were to use standard 3:1 aqua regia you would have used way too much nitric to do the job. And you will likely have digested enough base metals to force some digested gold out of solution to be mixed in with the insoluble portion. This is why aqua regia is not used for this process. In addition, to allow the chemistry to contact all of the gold, the parts are typically granulated before processing to expose as much of the precious content as possible.

If it were me, this is a perfect option for smelting and electrolytic copper cells. In fact that is exactly what Emak should have told you because they sell equipment for that process as well.

There is a possibility you could use the tumbler function for either Hydrochloric Acid and strong peroxide to dissolve the gold and filter the solution and process it for the gold in your cementation tank but that process may be better advised by members using the chemistry I just mentioned to dissolve exposed Gold on e-scrap. But your equipment is overkill for that process.

You can consider cyanide stripping the granulated parts and recovering the Gold with zinc and eventually cleaning up the gold by refining it in your Emak machine, but it will take a lot of cyanide stripping to fill a machine with a 25 kg capacity!

I am at a loss to figure out why the system you have was recommended for processing ram and IC chips.

If it were me, this is a perfect option for smelting and electrolytic copper cells. In fact that is exactly what Emak should have told you because they sell equipment for that process as well.----- can you elaborate this, how we can use this emak RRM25 for copper?

 

[Chemlab]

If it were me, this is a perfect option for smelting and electrolytic copper cells. In fact that is exactly what Emak should have told you because they sell equipment for that process as well.----- can you elaborate this?

Actually, we are not buying this RRM 25 from EMAK, we have taken this machine from our partners, Now our material is mainly RAM and Processors, So we need to extract gold, silver, palladium out of this, That is why I put my enquiry here.

 

[Yggdrasil]

Actually, we are not buying this RRM 25 from EMAK, we have taken this machine from our partners, Now our material is mainly RAM and Processors, So we need to extract gold, silver, palladium out of this, That is why I put my enquiry here.

The way to go is to smelt and then an electrolytic cell.
This is a bit involved since it means shredding the boards fine and selecting a proper flux prior to smelting.