Hello everyone, I am a new member, but not new to this forum. I've this problem for quite sometime and have been searching for answers here and everywhere else but to no avail, thus I decided to post a new topic. I apologise before hand for my bad English.
I am manufacturing 24k hard gold and doing refinery of 24K gold for my market. The 24k hard gold first required to have potassium gold cyanide (PGC), that I also have to make rather than buying from the market. The liquor in hard gold production tank I have to buy from supplier, and what in there is a secret to me of course. Now the production process is to put the PGC in the liquor tank and run electrolysis. Initially I need minimum of 1.47kg PGC in the tank (1kg of 24k Gold), and I always keep that amount in there. My tank had become quite dark (reason will be posted below) and I have to make a new tank, thus the need to recover the gold. I poured all the liquor into the electrowining machine, but so far I've only able to collect 318g of 9999 Gold ( after AR refinery). I have put some more Potassium cyanide in the electrowining tank and keep running, but I didnt see any gold on the cathode, only some black powder on there. I have no idea what is that black powder. There was some black powder in my first attempt along with gold, after drying those I have 420g of gold and powder, then after AR refinery only 318g of pure gold collected as mentioned above. Now I have 40L of liquor and more than 600g of gold in solution that is unable to electrowin out.
The liquor was very clear when I first started, The few first batch of PGC were a bit yelow in color, but no effect on the production. Later when I made the PGC, the solution got "burn", my PGC is half black, but I still put it in the production tank. That happened a few times until I got it right, the PGC now is white as salt, but the production liquor had become really dark, and thats why I have to make a new tank.
How do i recover the gold out of the old liquor?
What is that black powder that I recover up until now? Given that I had only used distilled water, 24k Gold and Potassium Cyanide to make the PGC. That black powder can not be dissolve in nitric acid, not even in AR as I tried, because my first thought was it must be some kind of metal as it was the result of electrowining.
Thanks in advance!
I am manufacturing 24k hard gold and doing refinery of 24K gold for my market. The 24k hard gold first required to have potassium gold cyanide (PGC), that I also have to make rather than buying from the market. The liquor in hard gold production tank I have to buy from supplier, and what in there is a secret to me of course. Now the production process is to put the PGC in the liquor tank and run electrolysis. Initially I need minimum of 1.47kg PGC in the tank (1kg of 24k Gold), and I always keep that amount in there. My tank had become quite dark (reason will be posted below) and I have to make a new tank, thus the need to recover the gold. I poured all the liquor into the electrowining machine, but so far I've only able to collect 318g of 9999 Gold ( after AR refinery). I have put some more Potassium cyanide in the electrowining tank and keep running, but I didnt see any gold on the cathode, only some black powder on there. I have no idea what is that black powder. There was some black powder in my first attempt along with gold, after drying those I have 420g of gold and powder, then after AR refinery only 318g of pure gold collected as mentioned above. Now I have 40L of liquor and more than 600g of gold in solution that is unable to electrowin out.
The liquor was very clear when I first started, The few first batch of PGC were a bit yelow in color, but no effect on the production. Later when I made the PGC, the solution got "burn", my PGC is half black, but I still put it in the production tank. That happened a few times until I got it right, the PGC now is white as salt, but the production liquor had become really dark, and thats why I have to make a new tank.
How do i recover the gold out of the old liquor?
What is that black powder that I recover up until now? Given that I had only used distilled water, 24k Gold and Potassium Cyanide to make the PGC. That black powder can not be dissolve in nitric acid, not even in AR as I tried, because my first thought was it must be some kind of metal as it was the result of electrowining.
Thanks in advance!