The research on concentration of lumped siderite ores of shaft output at preparation them for reducing roasting were carried out, it was carried out with using of industrial X-rayradiometric separators. The technological scheme of preparation of siderite ores for metallizating roasting in shaft-furnaces was suggested. The scheme ensures obtaining the concentrate after the X-rayradiometric separation with necessary metallic properties. The obtained results present certain interest for further improvement of methods of preparation of siderite ores for metallurgical operations and increasing amounts of their using.