四川攀西某难选钛铁矿重选精矿浮选试验研究

四川攀西某难选钛铁矿重选精矿矿物种类多,金属矿物主要有钛铁矿、钛磁铁矿等,脉石矿物主要为钛辉石、绿泥石等。钛铁矿与脉石矿物嵌布粒度偏细,脉石矿物多含铁元素且易泥化。为实现该重选精矿的高效分选,进行了选矿试验研究。结果表明,通过阶段磨矿—弱磁除铁—浮选富集钛—强磁提质的工艺流程能够获得良好的分选指标。矿样磨细至-0.074 mm占55%,在弱磁选磁场强度为96 kA/m条件下弱磁除铁,弱磁尾矿以硫酸为pH调整剂、羧甲基纤维素钠(CMC)为抑制剂、油酸钠为捕收剂浮选钛铁矿,将浮选粗精矿筛分(-0.038 mm)后,筛上磨细至-0.074 mm占80%,与筛下产品合并脱泥后去除-0.014 mm粒级细泥,沉砂经4次精选,闭路浮选可获得钛精矿TiO_2品位42.86%、回收率59.79%的浮选指标;对浮选精矿创新性地进行强磁提质分选工艺,最终获得钛精矿TiO_2品位46.77%、回收率54.38%的选别指标。实现了钛资源的有效回收,可以为选厂建设提供技术支持。

Experimental Study on the Flotation of a Refractory Ilmenite Gravity Concentrate in Sichuan Panxi Area

There is a variety kinds of minerals in ilmenite gravity concentrate from Sichuan Panxi Area, metallic minerals mainly including ilmenite, titanomagnetite, gangue minerals mainly including titanaugite, chlorite. Dissemination size of ilmenite is fine, as well as gangue minerals, most of gangue minerals containing iron elements and easy to be slime. To high efficiently separation the ilmenite, beneficiation experiment was conducted. The results show that good separation indexes can be obtained through the technological process of stage grinding-low intensity magnetic removal iron-flotation concentrating titanium-high intensity magnetic separation and extraction. The ore sample was ground to -0.074 mm accounting for 55%， and ferromagnetic iron ore is removed under the condition of magnetic field intensity of low intensity magnetic separation 96 kA/m. Low intensity magnetic tailings are used to separate ilmenite in flotation with sulfuric acid as pH adjuster， sodium carboxymethyl cellulose （CMC） as inhibitor， sodium oleate as collector. The obtained flotation rough concentrate is classified by 0.038 mm， oversize product was ground to -0.074 mm passing 80%. It is combined with the undersize product to remove the -0.014 mm fine mud. Then four cleaning processes are applied on the sand setting. By the closed-circuit flotation test， the flotation indexes of 42.86% titanium grade and 59.79% recovery were obtained. Furthermore， the indexes of closed-circuit concentrate were obtained with 46.77% titanium dioxide grade and 54.38% recovery through high-intensity magnetic separation， which realized the effective recovery of ilmenite resources and can provide the technical assistance for plant development.