The recycling and utilization of waste materials is an important issue for sustainable development of human society in the 21st century. Compared with primary resources, precious metal waste has a high content of precious metals and a relatively single composition. Therefore, the treatment process is relatively simple, the processing cost is low, and the resulting metal grade is high, making it a valuable secondary resource.

Due to the high solubility of copper minerals associated with gold, except for a few copper minerals such as chalcopyrite and chrysotile, most of them such as malachite, chalcopyrite, and chalcopyrite have high solubility in cyanide solutions.

Gold mines, as one of the most precious resources on Earth, have always been present in the development process of human society and play a crucial role in cultural exchange.

When most people mention precious metals, they first think of gold and silver, but there are actually many metals that are more expensive than gold. The value of metals depends on their rarity, extraction difficulty, characteristics, and market demand.

Key alloy wire refers to high-purity gold alloy wire with a purity of 99.99% and a wire diameter of 18-50 μ m. Usually, ball welding wedge welding is used for bonding and is commonly used for plastic resin packaging.