Electrical Sliding Contact Recycling: Which Items Do Contacts Appear On?

Electrical Sliding Contacts, as an important conductive material, with its high conductivity, corrosion resistance, and oxidation resistance properties, have become a key component for power transmission and signal control, and are widely used in various electrical equipment. 

Household appliances

Relay and Switch: Almost all household appliances, such as air conditioners, refrigerators, and washing machines, have control circuits equipped with contact relays. Take the air compressor starter of an air conditioner as an example, the contact contains up to 85% silver, and each device can recover 0.5-1.2 grams of silver; in old-fashioned mechanical thermostats, the silver layer thickness of the Round Silver Bimetal Rivet is usually 0.1-0.3 millimeters.

Circuit breakers and contactors: The Bi-metal Silver Contacts in residential distribution boxes use silver-tungsten alloy (AgW50), with a silver content of 40-60%; industrial AC contactors have a silver content of up to 15-20 grams per pair of main contacts.

Industrial equipment applications
Power control systems: The Bimetal Silver Composite Contact Rivets in high-voltage distribution cabinets often use silver-tungsten oxide alloy, with a silver content of 50% and the ability to resist arc erosion. A 10kV circuit breaker single-phase contact weighs about 200 grams, and 100 grams of pure silver can be extracted from it.

Automation instruments: The signal relays' contacts in PLC modules often use silver-nickel alloy, with a typical size of 2×3mm, containing over 90% silver, and an automation control cabinet may contain dozens of such Bimetal Rivet-type Contacts.

Special field applications
Railway transportation equipment: The main control relays of subway vehicles use AgSno2 Contact, with anti-soldering characteristics, and a single traction system contact group contains up to 300-500 grams of silver.

New energy field: The DC contactors in photovoltaic inverters use Bi-Metal Rivets, with each MW installed capacity corresponding to a contact containing about 1.2 kilograms of silver; the charging gun contacts of charging piles contain up to 60% silver.

Key Points of Contact Recycling Technology
Physical Separation Method: Using a 80-100 mesh vibrating screen combined with eddy current separation, it can process Electrical Bimetal Rivet in waste electrical appliances and achieve a recovery rate of over 92%.

Chemical Purification Process: The nitric acid dissolution - electrolytic refining method can increase the silver content to 99.95%, and when dealing with Electrical Bimetal Contact Rivets containing copper impurities, the pH value needs to be controlled within the range of 1.5-2.0.

Economic Value Assessment: Based on the current silver price of 6.5 yuan per gram, 1 ton of ordinary Bi-metal Silver Contact Point (with 40% silver content) is valued at approximately 260,000 yuan, and the gross profit margin of industrial-grade contact recycling is usually maintained at 35-45%.

The Electrical Sliding Contacts we have launched inherit the core advantages of silver contacts, such as high conductivity, corrosion resistance, and oxidation resistance. At the same time, it has optimized the wear resistance and anti-electric arc ablation performance for different usage scenarios of various devices. It is suitable for all fields including household appliances, industrial power control, rail transportation, and new energy, meeting the conductive requirements of various fields. It can precisely match the signal transmission and power control requirements of various devices, providing high-quality conductive solutions for the stable operation of electrical equipment in various industries.

If you need to know the detailed parameters and customization services of Bimetal Relay Contact Point, please feel free to consult at any time. We sincerely invite you to place an order and make a purchase!