云南钛铁矿砂矿磁选试验研究

Experimental Research on Magnetic Separation of Ilmenite Placer of Yun Nan

云南钛铁矿石中主要有用矿物为钛铁矿、钛磁铁矿,矿石泥化较严重,针对该矿石进行了磁选试验研究。对原矿采用选择性擦洗解离,可以得到TiO2品位35.31%,产率78.25%的+0.030mm产品及TiO2品位8.46%,产率21.75%的-0.030mm产品。+0.030mm粒级采用弱磁除铁,弱磁尾矿采用分级-强磁选工艺进行选钛试验,对弱磁精矿再磨后采用弱磁-强磁工艺进行钛、铁分离;-0.030mm粒级采用脱泥-磁选工艺进行细粒选钛试验。最终可得到TiO2品位48.83%的钛精矿,回收率85.51%,TFe品位56.62%的铁精矿,回收率25.17%。该工艺合理可行,选矿指标较为理想。

The main useful components of ilmenite placers of Yun Nan are ilmenite and titanium magnetite and the ores are extremely sliming.Experimental research on magnetic separation for this ore was adopted.When the technology of selective scrubbing dissociation was carried on,＋0.030mm products of 35.31%TiO2 with the yield of 78.25% and-0.030mm products of 8.46% TiO2 with the yield of 21.75% were obtained respectively.Directed at ＋0.030mm products,low-intensity magnetic separation was adopted to remove iron,the tailings of which was carried on titanium beneficiation by adopting the technology of grading—high-intensity magnetic separation and the concentrate was carried on separating iron and titanium by using low-intensity magnetic separation—high-intensity magnetic separation.Directed at the-0.030mm products,fine particle titanium separation was carried on by using the technology of desliming—magnetic separation.Finally,titanium concentrate of 48.83%TiO2 with recovery of 85.51% and iron concentrate of 56.62%TFe with recovery of 25.17% were obtained.This technology is rational and feasible and the separation index is satisfactory.