What is a smelting by-product?

A smelting by-product is a material that is generated as a secondary output during the smelting process, which is used to extract metal from its ore. These by-products can include slag, which is a glassy material formed from impurities, as well as various gases and other residual substances. Depending on the metal being smelted, by-products may also contain valuable metals or minerals that can be further processed or recycled. Proper management of smelting by-products is essential for environmental sustainability and resource recovery.