A process for melting material to be treated includes placing material to be treated in a container that may include an insulating lining, heating the material to be treated and melting the material to be treated, preferably allowing the melted material to cool to form a vitrified and/or crystalline...http://www.google.es/patents/US7429239?utm_source=gb-gplus-sharePatente US7429239 - Methods for melting of materials to be treated
