废旧镀金件回收工艺流程

废旧镀金件回收工艺流程
英文回答：
The process of recycling waste gold-plated items involves several steps that are aimed at separating the gold from the other materials and refining it for reuse. Let me explain the process in detail.
1. Collection: The first step is to collect the waste gold-plated items. These can include old jewelry,
electronic components, or any other items that have a layer of gold plating on them. These items are usually obtained from individuals, jewelry stores, or electronic waste recycling centers.
2. Sorting: Once the items are collected, they need to be sorted based on their composition. This is important because different materials may require different recycling methods. For example, if the gold-plated items also contain other precious metals like silver or platinum, they need to
be separated first.
3. Dismantling: After sorting, the gold-plated items
are dismantled to remove any non-gold materials. This may involve cutting, grinding, or melting the items to separate the gold layer from the base material. For example, in the case of electronic components, the gold-plated pins or connectors are removed from the circuit boards.
4. Chemical Treatment: The next step is to treat the gold-plated items with chemicals to dissolve the gold layer. This can be done using a combination of acids, such as
nitric acid or aqua regia. The chemicals react with the gold, leaving behind other impurities.
5. Filtration: Once the gold is dissolved, the solution is filtered to remove any solid impurities. This ensures
that only the gold-containing solution remains.
6. Precipitation: The filtered solution is then treated with a reducing agent, such as sodium metabisulfite or
oxalic acid, to precipitate the gold. This causes the gold
to form solid particles that can be easily separated from
the solution.
7. Refining: The precipitated gold particles are
further refined to remove any remaining impurities. This
can be done through processes like smelting or electrolysis. The end result is pure gold that can be used for various purposes.
8. Reuse or Sale: Finally, the refined gold can be reused for manufacturing new gold-plated items or sold to gold refineries or jewelry manufacturers.
中文回答：
废旧镀金件回收的工艺流程包括几个步骤，旨在将金与其他材
料分离并提炼出可再利用的金。

让我详细解释一下这个过程。

1. 收集，第一步是收集废旧镀金件。

这些可以包括旧珠宝、电
子元件或任何其他有金镀层的物品。

这些物品通常是从个人、珠宝
店或电子废物回收中心获得的。

2. 分类，收集到物品后，需要根据其组成进行分类。

这很重要，因为不同的材料可能需要不同的回收方法。

例如，如果镀金物品还
含有其他贵金属如银或铂，需要先进行分离。

3. 拆解，分类后，将废旧镀金件进行拆解，以去除非金材料。

这可能涉及切割、研磨或熔化物品，以将金层与基材分离。

例如，
在电子元件的情况下，将金镀的引脚或连接器从电路板上取下。

4. 化学处理，下一步是用化学品处理镀金件，以溶解金层。

这
可以使用一种或多种酸，如硝酸或王水。

化学品与金发生反应，留
下其他杂质。

5. 过滤，金溶液经过过滤，以去除任何固体杂质。

这确保只有
含金溶液留下。

6. 沉淀，然后，过滤后的溶液经过还原剂处理，如亚硫酸钠或
草酸，以沉淀金。

这使金形成固体颗粒，可以轻松地与溶液分离。

7. 提炼，沉淀的金颗粒进一步提炼，以去除任何剩余的杂质。

这可以通过熔炼或电解等过程完成。

最终得到的是纯金，可用于各
种用途。

8. 再利用或销售，最后，经过提炼的金可以再利用于制造新的镀金件，或者出售给金炼厂或珠宝制造商。