攀西某钒钛铁精矿提质降杂试验研究  

Experimental study on quality improvement and impurity reduction of a vanadium-titanium iron concentrate in Panxi

作　　者：李硕 陈福林 蔡先炎 黄立雨 王志杰 吴宁 黄延[1,2] Li Shuo;Chen Fulin;Cai Xianyan;Huang Liyu;Wang Zhijie;Wu Ning;Huang Yan(State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,Sichuan,China;PangangGroupPanzhihuaIron&SteelResearchInstituteCo.,Ltd.,Panzhihua617000,Sichuan,China;Pangang Group New Baima Mining Co.,Ltd.,Panzhihua 617000,Sichuan,China)

机构地区：[1]钒钛资源综合利用国家重点实验室,四川攀枝花617000 [2]攀钢集团攀枝花钢铁研究院有限公司,四川攀枝花617000 [3]攀钢集团新白马矿业有限责任公司,四川攀枝花617000

出　　处：《钢铁钒钛》2023年第5期105-110,共6页Iron Steel Vanadium Titanium

基　　金：攀枝花市科技计划项目(2021 CY-G-8)。

摘　　要：攀西某钒钛铁精矿TFe为55.88%,主要杂质元素化学成分为TiO_(2)、SiO_(2)、Al_(2)O_(3)、MgO、CaO,粒状钛铁矿及脉石矿物等杂质组分占比达14.26%,钛铁矿主要以客晶形式嵌布于钛磁铁矿基底中,粗、细粒铁精矿中杂质组分及嵌布特征差异显著。针对该样品,在实验室开展了“预先分级—粗粒再磨磁选”“预先分级—粗粒再磨磁选—细粒磁选”“深度磁选—分级—粗粒再磨磁选”3种工艺对比试验,以及电磁湿法鼓式磁选机、高频谐波磁选机、磁选柱3种磁选设备对比试验,并对提质前后铁精矿的主要化学成分及矿物组分进行了对比分析。研究表明,以电磁湿法鼓式磁选机为选别设备,采用“预先分级(0.074 mm)-粗粒再磨(-0.074 mm占96.50%)磁选—细粒直接磁选”工艺的提质效果最优,该钒钛铁精矿经提质后TFe提升3.36个百分点,杂质组分占比累计降低了6.92个百分点,TFe/TiO_(2)提高了3.44个百分点。The TFe grade of a vanadium-titanium-iron concentrate in Panxi is 55.88%.The chemical composition of the main impurity elements in the sample include TiO2,SiO2,Al_(2)O_(3),MgO and CaO,the proportion of impurities such as granular ilmenite and gangue minerals accountes for 14.26%.Ilmenite is mainly embedded in the titanium magnetite base in the form of guest crystals,and there are significant differences in impurity components and distribution characteristics between coarse and fine grained ferrotitanium vanadium concentrates.Three comparative experiments were conducted on the vanadium titanium iron concentrate,including"preliminary classification-coarse particle regrinding magnetic separation","preliminary classification-coarse particle regrinding magnetic separation-fine particle magnetic separation",and"deep magnetic separation-classification-coarse particle regrinding magnet ic separation".Meanwhile,magnetic separation equipment comparative tests were cared out by using electromagnetic wet drum magnetic separator,high-frequency harmonic magnetic separator and magnetic separation column.In addition,a comparative analysis was conducted on the main chemical and mineral components of the iron concentrate before and after upgrading.Research results show that using an electromagnetic wet drum magnetic separator as the sorting equipment,the process of"preliminary grading(0.074mm)-coarse particle regrinding(−0.074 mm accounting for 96.50%)magnetic separation-direct magnetic separation with fine particle"has the best quality improvement effect.After the quality improvement,the TFe grade of the vanadium titanium iron concentrate increases by 3.36 percentage points,the proportion of impurities decreases by 6.92 percentage points,and the TFe/TiO2 increases by 3.44 percentage points.

关 键 词：钒钛铁精矿 提质 高频谐波磁选机 磁选柱 

分 类 号：TD951[矿业工程—选矿]