Tin recycling refers to the collection of tin waste from daily life and industrial production waste metals. Recycled tin is a product obtained from the metallurgical process of recovering tin waste, including three types of waste: iron scrap, tin alloy scrap, and hot-dipped tin slag.

Tin content in iron scrap is low (0.5%~2%), with large quantities, as the annual consumption of tinplate reaches 18 million tons; there are many types of tin alloy scrap, including various bearing alloys, easily melted alloys, solders (collectively known as lead-tin alloys), and tin brass scrap, which generally contain more than 2%~5% tin, and also contain recoverable components like lead, copper, antimony, and zinc; hot-dipped tin slag has a high tin content, but is in limited quantity.

Tin is typically recovered industrially from the aforementioned waste materials. The tin recovered from tin-containing waste is known as recycled tin, which differs from primary tin produced directly from ore concentrate. The quality of recycled tin is continuously improving with the advancement of recovery methods, with electrolytic processes using additives currently considered the most ideal method.