四川攀西某难选钛铁矿重选精矿浮选试验研究
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摘要
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。
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.
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.
引文
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[3]王飞旺,崔毅琦,童雄,等.钛铁矿选矿技术研究与应用[J].矿产综合利用,2016(1):1-6.Wang Feiwang,Cun Yiqi,Tong Xiong,et al.Study and application of ilmenite beneficiation technology[J].Multipurpose Utilization of Mineral Resources,2016(1):1-6.
[4]马龙秋,杜雨生,孟庆有,等.钛铁矿浮选药剂及其作用机理研究进展[J].金属矿山,2018(3):7-12.Ma Longqiu,Du Yusheng,Meng Qingyou,et al.Research progress on flotation reagents of ilmenite and their interaction mechanisms[J].Metal Mine,2018(3):7-12.
[5]严鹏,张桂芳,肖军辉,等.云南某细粒钛铁矿的选矿工艺试验研究[J].有色金属:选矿部分,2013(3):38-41.Yan Peng,Zhang Guifang,Xiao Junhui,et al.Experimental research on processing of fine fraction ilmenite ore of Yunnan[J].Nonferrous Metals:Mineral Processing Section,2013(3):38-41.
[6]李振乾,邹定朝.磁-浮联合工艺回收某钒钛磁铁矿石中钛铁矿试验[J].金属矿山,2017(1):67-71.Li Zhenqian,Zhou Dingchao.Experimental research on the recycle of ilmenite from a vanadium titanium magnetite ore by the combined magnetic-flotation process[J].Metal Mine,2017(1):67-71.
[7]邓冰,张渊,杨永涛,等.攀西某钒钛磁铁矿选铁尾矿选钛试验研究[J].矿产综合利用,2018(4):91-96.Deng Bing,Zhang Yuan,Yang Yongtao,et al.Experimental study on titanium concentration for iron tailings inPanxi[J].Multipurpose Utilization of Mineral Resources,2018(4):91-96.
[8]Tian Jia,Xu Longhua,Yang Yaohui,et al.Selective flotation separation of ilmenite from titanaugite using mixed anionic/cationic collectors[J].International Journal of Mineral Processing,2017(8):102-107.
[9]王键月,崔卫华,张以河,等.拜耳法赤泥中的铁的强磁选预富集-深度还原-弱磁选试验[J].金属矿山,2016(1):60-64.Wang Jianyue,Cui Weihua,Zhang Yihe,et al.The preconcentration of strong magnetic separation for iron in the red clay of Bayer method-deep reduction-weak magnetic separation test[J].Metal Mine,2016(1):60-64.
[10]Liu Weijun,Zhang Jie,Wang Weiqing,et al.Flotation behaviors of ilmenite,titanaugite,and forsterite using sodium oleate as the collecto[rJ].Minerals Engineering,2015,72:1-9.
[11]程奇,钟宏,王帅,等.长碳链烷基羟肟酸对钛铁矿的浮选性能与机理研究[J].应用化学,2016,45(8):1407-1411.Cheng Qi,Zhong Hong,Wang Shuai,et al.Study on flotation properties and mechanism of ilmenite with long carbon chain hydroxamic acid[J].Applied Chemistry,2016,45(8):1407-1411.