The invention discloses a separation
reagent for promoting flotation of
iron ore and associated iron-containing
silicate, which is used for adsorbing excessive Ca < 2 + > ions in flotation circulating water and selectively separating specularite and
chlorite for
reverse flotation. The agents are sequentially added in a proper pH environment and are subjected to
reverse flotation operation, floatability difference between
iron ore and iron-containing
silicate can be effectively promoted, redundant Ca < 2 + > in flotation circulating water is reduced, and the quality of
iron ore concentrate can be improved through a
reverse flotation means. Compared with the prior art, the flotation agent has the advantages that the flotation agent is high in flotation environment applicability, good flotation performance can be kept in a common environment with the pH being 6-8, meanwhile, the excellent separation effect can be achieved under the low-dosage condition, and the phenomenon that Ca2 + ions are excessive due to the fact that mining filling bodies fall and are mixed into concentrate can be effectively improved. Compared with
single use of traditional iron ore inhibitor
starch and
dextrin, the method has the advantages that better iron
ore concentrate indexes can be obtained through a reverse flotation means by using a pre-adsorption agent
system, and meanwhile, the phenomenon that excessive Ca < 2 + > ions are entrained and dissolved out from concentrate
gangue is further reduced.