Extracting rare metals from scrap electrical appliances is a complex and specialized task that requires specific techniques and equipment. Here are some common methods and steps, but it should be noted that these processes can usually only be carried out safely and effectively with expertise and equipment: 1. **Disassembly**: First, the scrap electrical appliances need to be disassembled to separate the parts containing metals. The disassembly process needs to be careful to avoid damaging valuable components or causing contamination. 2. **Sorting**: Separate different materials. Electronic devices may contain a variety of metals, such as gold, silver, copper, cobalt, palladium, etc. Through manual sorting or with the help of machines, such as using magnetic separation, electrostatic separation and other methods. 3. **Chemical treatment**: Use chemical reagents to dissolve and extract specific metals. For example, use cyanide solution to recover gold, or acid solution to dissolve and collect other metals. This process needs to be carried out under strict control to avoid the generation of hazardous waste. 4. **Electrolysis**: Further purify the metal through electrolysis. For example, electrolytic refining can be used to purify copper. 5. **Smelting**: The recovered metals are smelted to remove impurities and obtain high-purity metals. 6. **Safe and environmentally friendly disposal**: All chemical reagents and waste must be handled in accordance with local environmental regulations to ensure that there is no pollution to the environment. 7. **Sell**: The extracted metals can be sold according to purity and market demand. Establishing a connection with a metal recycling company or an electrical appliance recycling company may make it easier to find a buyer. Please note that this operation may not only be unsafe for individuals, but may also be illegal in some areas. It is recommended to contact a professional electronic waste recycling company or metallurgical company, who have professional equipment and technology to safely and effectively recycle and process these materials.