Abstract: A method for melting ferrous metals, non-ferrous metals, machining waste and scrap and steel, includes the following steps of providing a closed container made of a material that is compatible with a melting bath in which it is to be placed and is adapted to contain materials adapted to be used as corrective substances in the melting bath; introducing the corrective substances in the container so as to obtain a closed container which contains the corrective substances; inserting the closed container in the melting bath; and monitoring the melting of the container and the release of the corrective substances in the melting bath.