The cell phone has become an essential thing in our life today. We seem to be incomplete without cell phones. And it is a plus point for the E-waste recyclers. There is a great variation in the yields of precious metals from the cell phones of different makes. I mean, you don’t get the same amount of precious metals from all the cell phones. Branded mobile phones give you better gold recovery than the cheaper ones, especially, made in china. If you dismantle a cell phone, you will find the gold on its motherboard (PCB), the connectors in cell phones are gold plated. The chips on the mobile motherboard also have gold in them.
Before recovering gold from the
cell phones, you have to dismantle them. The ceramic capacitors in the cell
phones contain silver, gold, palladium and sometime platinum also. So, first of
all remove all the components from the motherboards carefully. There are many
videos on YouTube that explain the dismantling of cell phones. You can watch
one or two videos and understand the whole process.
First, we will talk about gold
recovery from mobile PCB. These days there are many non cyanide gold recovery
chemical compounds with different brand names available in the market. You can
search them on the net and buy one. They are very economical and most of them
are made in China. Their brochures provide you complete details about how to
use the chemicals for gold recovery. So, for gold recovery from mobile PCBs,
you can use that chemical. Another option is cyanide gold recovery also. But
cyanide is harmful. If you need some help about it. You can write to me also.
Secondly, we need to recover gold
from gold plated connectors used in mobile phones. You can use nitric acid for
it. Gold recovery from gold plated pins through nitric acid is also a good
process. But you should do it in an open place or an appropriately ventilated
room.
Thirdly, you have to process chips
for gold recovery. Chips are first burnt, and then ground into a fine powder.
Then the pins are separated from the powder/ash through a sieve. Store these
pins, and when you have a saleable quantity of these pins, you can sell them to
a smelter.
The fine ash contains the very thin
gold wires used in bonding in the integrated circuits. So, you can wash away
all the ash with water using a metal bowl. This method is known as panning.
There are many companies who sell these panning bowls. They show you a demo also.
It is not very expensive. You can get it at an affordable price. After removing
the ash, you have silicon chips and golden wires left in the bowl. You can
recycle that gold with aqua regia.
Apart from chips, there are other
components also on the motherboard that contain gold. They can also be treated
with aqua regia for gold recovery.
I have intentionally kept the
article short. Mentioning all the details about gold recovery processes would
make the article too long. And some people might find a long article boring.
So, I have given the basic ideas about the processes mentioned above. You can
always write to me, if you need to know more about any of the processes
mentioned in the article. You can reach me through my website: www.recovercomputergold.com
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आपसे निवेदन है कि हमारी पोस्ट को लाइक करें , अपने कमेन्ट्स दें , शेयर करें |
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