I have successfully extracted gold from gold fingers from RAM. However, I am having difficulty dealing with the sludge created when processing IC chips.
Here is my process:
1. Burn IC chips till they turn ash grey
2. Grind them to powder
3. Wash the powder 5~6 times. A lot of sludge is formed during the step
4. Dissolve the sludge using aqua regia (300ml hcl + 100ml hno3)
5. Start the filteration process after 24 hours
6. The sludge seems to prevent the liquid being filtered (I am using a cotton filter for the process)
What part am I missing here?
Do I need to wash away the sludge as well or use specific type of filtering equipment?
Here is my process:
1. Burn IC chips till they turn ash grey
2. Grind them to powder
3. Wash the powder 5~6 times. A lot of sludge is formed during the step
4. Dissolve the sludge using aqua regia (300ml hcl + 100ml hno3)
5. Start the filteration process after 24 hours
6. The sludge seems to prevent the liquid being filtered (I am using a cotton filter for the process)
What part am I missing here?
Do I need to wash away the sludge as well or use specific type of filtering equipment?