Companhia Vale do Rio Doce, together with its subsidiaries, operates as a diversified metals and mining company worldwide. It produces, exports, and supplies iron ores and pellets to the steel making industry, as well as manganese ores and iron alloys, including metallurgical ore used primarily for the production of ferroalloys; natural manganese dioxide used for the manufacture of electrolytic batteries; and chemical ore used in various industries for the production of fertilizer, pesticides, a ...