新疆某钒钛磁铁矿工艺矿物学研究

    Process Mineralogy of a Vanadium-titanium Magnetite Ore in Xinjiang

    • 摘要: 为查清新疆某钒钛磁铁矿的矿石性质,给该矿石进行高效利用提供科学依据,本研究结合扫描电镜(SEM)、电子探针(EPMA)、AMICS等分析方法,开展了系统的工艺矿物学研究。研究结果表明,该矿石为低品位贫矿,主要有价元素为铁和钛, TFe品位为11.64%, TiO2品位为3.83%。矿石中还含有高比例的SiO2(42.60%)和Al2O3(12.69%),以及含量偏高的P2O5(2.23%)。矿石的矿物组成复杂,脉石矿物占比超过80%,其中主要为斜长石(38.99%)、角闪石(13.48%)和辉石(12.43%)。本矿中磁铁矿是铁的主要载体,其中铁的分布率占总铁的40.63%。钛铁矿是钛的主要载体,其中钛的分布率占总钛的80.55%。矿石中磁铁矿和钛铁矿的复杂嵌布关系是影响选矿回收的关键因素。与普通钒钛磁铁矿不同,本矿石中有微细粒磁铁矿赋存于钛铁矿中,导致这部分磁铁矿与钛铁矿极难分离。钛铁矿的绿泥石化和榍石化,也影响了精矿质量。在后续选矿工艺研究中,应重点关注铁钛矿物的解离、脉石矿物的去除以及有害伴生元素的控制。

       

      Abstract: In the purpose of determining the ore properties and provide a scientific basis for the efficient utilization of a vanadium-titanium magnetite ore in Xinjiang. This study conducted systematic mineralogical research using analytical methods, including scanning electron microscopy (SEM), electron probe microanalysis (EPMA), and an automated mineralogy identification and characterization system (AMICS). The research results indicate that the ore is a low-grade lean ore, with the main valuable elements being iron and titanium. The total iron (TFe) grade is 11.64%, and the titanium dioxide (TiO2) grade is 3.83%. The ore also contains a high proportion of SiO2 (42.60%) and Al2O3 (12.69%), as well as a relatively high content of P2O5 (2.23%). The mineral composition of the ore is complex, with gangue minerals accounting for over 80%, mainly plagioclase (38.99%), amphibole (13.48%), and pyroxene (12.43%). In this ore, magnetite is the main carrier of iron, with a distribution rate accounting for 40.63% of the total iron. Ilmenite is the main carrier of titanium, with a titanium distribution rate as high as 80.55% of the total titanium. The complex embedding relationship between magnetite and ilmenite is a key factor affecting mineral processing recovery. Unlike typical vanadian-titanomagnetite, this ore contains fine-grained magnetite embedded within ilmenite, making the separation of this portion of magnetite from ilmenite extremely difficult. The chloritization and sphene-ization of ilmenite also affect the quality of the concentrate. In future mineral processing research, the focus should be on the liberation of iron and titanium minerals, the removal of gangue minerals, and the control of harmful associated elements.

       

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