What are the components and proportions of recycled used mobile phones

The composition of used mobile phones is complex, mainly including the following types of substances, but the specific proportion may vary depending on factors such as phone model, brand, and production year. The following are common ingredients and their approximate proportion range (by mass):

1、 Metal materials (approximately 30% -50%)

Precious metals: gold (Au), silver (Ag), palladium (Pd), etc., accounting for about 0.01% -0.1% (such as a mobile phone containing about 0.03g of gold), although the content is low, the value is high.

• Non ferrous metals: copper (Cu, about 15% -20%), aluminum (Al, about 10% -15%), iron (Fe, about 5% -10%), nickel (Ni), tin (Sn), etc., are the main materials for motherboards, casings, circuits, etc.

Other metals: such as lithium (Li, in batteries), cobalt (Co, positive electrode material for lithium batteries, about 3% -5%), etc.

2、 Non metallic materials (approximately 40% -60%)

Plastic: accounting for about 20% -30%, commonly found in shells, buttons, screen frames, etc., including polycarbonate (PC), acrylonitrile butadiene styrene copolymer (ABS), etc.

Glass and ceramics: Screen glass (such as Gorilla Glass, about 10% -15%), ceramic components, etc., with high hardness and wear resistance.

Rubber: sealing rings, button glue, etc., accounting for about 5% -10%.

3、 Electronic components and others (approximately 10% -20%)

Circuit board (PCB): composed of fiberglass, resin, and metal circuits, accounting for about 5% -10%, it is the main carrier of precious metals.

• Battery: Lithium batteries (including positive electrode materials, electrolyte, separator, etc.), accounting for about 5% -10%, need to be separately recycled and processed.

Display screen: LCD or OLED, including polarizer, backlight module, etc., accounting for about 5% -10%.

4、 Hazardous substances (requiring special handling)

Lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (Cr6+) and other heavy metals, as well as brominated flame retardants (BFRs), are mainly present in batteries, circuit boards, and plastic components, accounting for less than 1%, but require compliant disposal to avoid environmental pollution.

precautions

The proportion of components in used mobile phones is greatly affected by dismantling processes and differences in models. In actual recycling, specific data needs to be determined through professional testing. At present, the formal recycling process classifies and extracts materials such as metals and plastics to achieve resource reuse, while safely disposing of harmful substances.

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