Study on Process Mineralogy of a Low-grade Vanadium-titanium Magnetite
China has abundant vanadium-titanium magnetite resources,but with the expansion of mining and beneficiation scale,the development and utilization of a large amount of low-grade difficult-to-process vanadium-titanium magnetite needs to be solved urgently.In this paper,a detailed process mineralogy study is carried out on a low-grade vanadium-titanium magnetite ore,and the results show that the study ore is a typical low-sulphur and low-phosphorus scandium-containing low-grade refractory vanadium-titaniummagnetite.The main recovered elements in the ore are TFe with a content of 15.23％,TiO2 with a content of 5.03％,and V2O5 with a content of only 0.15％.The main target minerals in the ore are titanomagnetite and ilmenite;the vein minerals are mainly pyroxene,followed by mica and sodium feldspar.Titanomagnetite is mainly embedded in coarse grains,mainly in irregular and granular form,and a small amount of irregular grains are wrapped in pyroxene and other vein minerals;ilmenite is embedded in medium and fine grains,mainly in irregular grains and platelets;sphene and hematite are the main titanium and iron containing minerals outside the target minerals,of which sphene is generally embedded in microfine grains,and hematite is mainly embedded in medium and fine grains.The target elements of Fe and Ti in ores have complex forms of occurrence.In addition to the target minerals titanomagnetite,hematite and ilmenite,a large number of vein minerals contain Fe and Ti elements,which greatly limits the level of Fe and Ti recovery and utilization.Therefore,when sorting this ore,priority can be given to dry magnetic separation for pre-treatment to throw off a large amount of vein minerals,and then magnetic separation,flotation and other efficient and low-cost processes can be used for subsequent operations to reduce beneficiation costs.
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