Gold is a precious metal that is highly valued for its rarity and beauty. It is widely used in jewelry, electronics, and other industries. Recovering gold from electronic waste has become an increasingly popular way to extract gold and other precious metals from items that would otherwise end up in landfills. One of the most lucrative sources of gold is VOIP server boards.
VOIP server boards contain more gold than other electronics PCB boards due to the fact that they are used in high-end communication systems. In order to recover gold from VOIP server boards, it is essential to follow the correct steps.
First, remove any screws, steel, and other metals from the board. Use pliers or a screwdriver to remove any metal components that are attached to the board. Then, remove the IC chip and gold-plated pins. This can be done by heating the board or using a hot air gun to soften the solder.
Step 2: Burn the IC Chips
Once the metals have been removed, the next step is to burn the IC chips. This is done to remove the plastic casing and expose the gold wires inside. Place the IC chips on a hot plate or in a furnace and heat them until they turn to ash. Wear protective gear, such as gloves and a respirator, while performing this step.
Step 3: Wash the Ash to Remove the Gold Wires
After the IC chips have been burned, the ash should be washed to remove any remaining gold wires. Mix the ash with water and let it sit for a few minutes. Then, strain the mixture through a coffee filter or other fine filter. The gold wires should be left behind in the filter.
Step 4: Collect the Gold Plated Pins and Gold Wires
The gold-plated pins and gold wires from the IC chips should be collected and placed in a large bucket. Add water to submerge half of the contents in the bucket.
Step 5: Add Aqua Regia
Add hydrochloric acid and nitric acid in the amount of aqua regia to the bucket. Aqua regia is a powerful acid that dissolves gold. Wear protective gear, such as gloves and a respirator, while performing this step.
Step 6: Wait for the Reaction to Complete
Let the contents of the bucket sit for several hours until the reaction is complete. This will allow the aqua regia to dissolve all of the gold.
Step 7: Filter the Solution
Once the reaction is complete, the solution should be filtered into a clean bucket. This will remove any impurities that may be present in the solution.
Step 8: Neutralize the Solution
Add urea to the filtered solution to neutralize the acid. This will make the solution safe to handle.
Step 9: Add Sodium Metabisulphite
Add sodium metabisulphite to the solution and stir well. This will cause any remaining gold to settle into the bottom of the bucket.
Step 10: Collect the Gold Sediment
Collect the gold sediment that has settled to the bottom of the bucket. Wear protective gear, such as gloves and a respirator, while performing this step.
Step 11: Smelt the Gold
The final step is to smelt the gold. This involves melting the gold to separate it from other metals. This can be done using a furnace or other heating source. Once the gold has been melted, it can be poured into a mold to create a gold bar or other shape.
In conclusion, recovering gold from VOIP server boards can be a lucrative and environmentally friendly way to extract precious metals from electronic waste. By following the correct steps and taking proper safety precautions, it is possible to recover gold and other valuable materials from these boards. However, it is important to note that this process can be dangerous and should only be done by those who are experienced in handling hazardous materials.
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