PROCESSO DE BENEFICIAMENTO DE MINERIOS DE FERRO OXIDADOS SILICOSOS POR FLOTACAO EM ESPUMA DE OXIDO DE FERRO DA GANGA CONTENDO SILICA

摘要

Iron oxides of finely-ground, low grade, siliceous oxidized iron ores can be effectively floated from the silica-bearing gangue in the presence of slime by conditioning an aqueous pulp of the ore with a reagent formed by incorporating a water-soluble polyvalent metal salt into an aqueous solution of an alkali metal silicate prior to subjecting the pulp to froth flotation in the presence of an anionic type collector.