To recover tin from tinplate waste or scrap, treat same with dilute chlorine, hotter than chlorine of tin, at the boiling point, so that the latter, directly upon its formation, evaporates, as if it stays in the form of a fluid touching the residues, it effects the formation of chlorine of iron, the reduction of tin taking place. The fumes of chlorine of tin are precipitated by steam, or by contact with moist surfaces in the chambers of condensation, or their absorption by a medium concentrated solution of chlorine of tin takes place. Another way of recovering tin from waste is to bring same into contact with sulphur in a boiling hot solution of sodium-sulphide, which thoroughly frees the iron from tin. This waste, which has been freed from tin, is washed and dried, heated to a welding heat in rolled iron tubs, and is then hammered into rod-iron. Then proceed to the evaporation of solution of sodium-sulphide, which holds the tin and calcine the residue in a reverberatory furnace. After this, reduce the calcine mass to tin at a raised heat by aid of a compound burned lime, charcoal and small coal.