Research on Beneficiation Process of a Low-grade Ilmenite Ore
A low-grade ilmenite ore has a TiO2 grade of 2.01％ and complex mineral composition. Based on the process mineralogy research results of the ore,the enrichment and tailing effect of pre-treatment technologies such as gravity separation,magnetic separation,gravity-magnetic separation and magnetic-magnetic separation on the ilmenite is investigated,and the process flow of " high-intensity magnetic separation to discard trailing-low intensity magnetic separation to remove iron-high intensity magnetic separation for enrichment of the titanium-flotation to recover titanium" is determined. The effects of flotation pH,inhibitor type and dosage,the amount of collector on the flotation recovery of ilmenite are studied,and a closed-circuit test is carried out. A titanium concentrate with a TiO2 grade of 43.21％,a recovery of 22.34％ in flotation operation and a relative run of mine recovery of 11.57％ is obtained. The useful mineral ilmenite in the ore is effectively recovered.
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