The cell phone has become an essential thing in our lives today. We seem to be incomplete without cell phones. And it is a plus for the e-waste recyclers. There is a great variation in the yields of precious metals from 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 those 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 contain gold.
Before recovering gold from the cell phones, you have to dismantle them. The ceramic capacitors in cell phones contain silver, gold, palladium, and sometimes platinum. 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 PCBs. These days, there are many non-cyanide gold recovery chemical compounds with different brand names available on the market. You can search for them on the internet and buy one. They are very economical, and most of them are made in China. Their brochures provide you with complete details about how to use the chemicals for gold recovery. So, you can use that chemical to recover gold from mobile PCBs. Another option is cyanide gold recovery. But cyanide is harmful. If you need some help with it, You can write to me as well.
Secondly, we need to recover gold from gold-plated connectors used in mobile phones. You can use nitric acid to do so. Gold recovery from gold-plated pins through nitric acid is also a good process. However, you should do it in an open place or in an appropriately ventilated room.
Thirdly, you have to process chips for gold recovery. Chips are first burned and then ground into a fine powder. Then the pins are separated from the powder or ash through a sieve. Store these pins, and when you have a saleable quantity of them, you can sell them to a smelter.
The fine ash contains the very thin gold wires used in bonding in the integrated circuits. So, using a metal bowl, you can wash away all the ash with water. This technique is referred to as panning. There are many companies that sell these panning bowls. They show you a demo as well. 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. With aqua regia, you can recycle that gold.
Apart from chips, there are other components on the motherboard that contain gold. Aqua regia can also treat these components to recover gold.
I have intentionally kept the article short. Mentioning all the details about gold recovery processes would make the article too long. 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 contact us via our blog's contact form.
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I wish you all the success in your endeavours and thank you for your time!
आपसे निवेदन है कि हमारी पोस्ट को लाइक करें, अपने कमेन्ट्स दें, शेयर करें |
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