Gold fabric filter

[Sy-Spark]

This video is about gold elution electrowinning process, I noticed in couple videos they use fabric to filter fine gold, even with squeezing no gold go throw it, in this video at minute 17 they use same fabric with squeezing, anyone knows about the type of this fabric?

 

[4metals]

My guess is the cloth is chamois cloth, which is a porous goat skin. I used it in Ecuador to squeeze the majority of the mercury out of amalgamated gold before the gold went into the mercury still. The liquid mercury passed through the chamois but never the gold.

Those boys in the video won't last long and they are thinking a respirator is effective for NOx. It's not!

 

[Sy-Spark]

Those boys in the video won't last long and they are thinking a respirator is effective for NOx. It's not!

I don't know why they even use nitric acid as first step! It's better to them to use dilute sulphuric acid to dissolve the steel wool, then leach silver and gold in nitric acid.

 

[4metals]

I don't know why they even use nitric acid as first step! It's better to them to use dilute sulphuric acid to dissolve the steel wool, then leach silver and gold in nitric acid

Either way they need exhaust.

 

[haveagojoe]

I'd guess just nylon mesh. The smallest woven nylon filter mesh is 1 micron. Non-woven nylon or polyester felt can go down to 0.1 microns- any gold particles smaller than that will be colloidal.

 

[haveagojoe]

I don't know why they even use nitric acid as first step! It's better to them to use dilute sulphuric acid to dissolve the steel wool, then leach silver and gold in nitric acid.

I don't think it's steel wool, it's carbon. He says the gold is leached at source, probably with cyanide, and absorbed into carbon which is brought to his plant. Desorbtion of the gold from the carbon is done with hot water, and some impurities are removed with electromagnetic trapping. I think what is shown in the video is not the complete process at all, and most of what we are seeing is the just carbon being washed and filtered out; the gold would be in solution.
Edit- no, I'm wrong- they are using steel wool as the cathode to recover the gold from solution, you are right.