Tin scrap recycling refers to the collection of tin waste from daily life and industrial production, including discarded tin metal materials. Recycled tin is a product obtained from the metallurgical process of recovered tin waste. The waste materials refined into high-purity recycled tin include iron scrap, tin-containing 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-containing scrap, including various bearing alloys, easy-melting alloys, solder (collectively known as lead-tin alloys), and tin brass scrap, etc., generally containing more than 2%~5% tin, as well as lead, copper, antimony, and zinc, which are valuable for recycling. Hot-dipped tin slag has a high tin content, but in smaller quantities.

Recycling tin is typically done industrially from the aforementioned waste materials. Tin recovered from waste containing tin is known as recycled tin, which differs from primary tin produced directly from ore. The quality of recycled tin is continuously improving with the refinement of recovery methods, with electrolytic processes using oxidizing agents currently being considered a more ideal recovery method.