攀西某钒钛磁铁矿的物质组成与结构特征研究

Study on the Compositions and Structure Characteristics of a Vanadium-titanium Magnetite from Panxi Region

利用化学分析、光谱分析、X射线衍射物相定性分析、矿相显微镜、扫描电镜、MLA工艺矿物参数自动定量分析等手段对攀西某钒钛磁铁矿的化学组成、矿物组成、结构构造特征进行系统研究。研究结果表明,矿石的化学组成主要为铁、钛、钒,其中TFe含量为31%左右,TiO_2含量约为11%,V2O5含量约为0.5%,均达到了工业利用的标准,是矿石选矿回收利用的主要组分;其次为铬、锰、钴、镍、铜,是矿石中的有益伴生元素。矿石的金属矿物主要为钛磁铁矿（约43.09%～45.09%）和钛铁矿（11.67%～13.17%）,可供工业上选别铁精矿和钛精矿;其次为黄铁矿、方铅矿、闪锌矿、黄铜矿等硫化物矿物,可经选矿得到硫钴精矿。矿石主要呈浸染状构造,矿物颗粒主要呈半自形-他形结构、包含结构、海绵陨铁结构、交代残余结构和固溶体分离结构。研究结果明确了该矿区矿石综合利用的物质基础,查明了矿石的结构构造特征,为矿石选矿工艺的制定提供了重要的基础资料。

The chemical analysis ,spectral analysis ,X-ray diffraction phase qualitative analysis ,optical micro- scope ,scanning electron microscope and MLA analysis were employed to systematically study the chemical and mineral compositions of a vanadium-titanium magnetite （V-Ti magnetite） from Panxi area in this paper. The results indicate that the V-Ti magnetite is mainly consisted of iron, titanium and vanadium, etc., with about 31% TFe,ll% Ti02 and 0.5% V205 satisfying the industrial utilization standards overall. Besides the iron,ti- tanium and vanadium all of which are the major components for utilization of this ore,a lot of beneficial associ- ated dements （e. g. chromium,manganese,cobalt,nickel and copper, etc. ） are contained in the V-Ti magne- rite. The main metallic minerals in this ore are titanium-magnetite （43.09% ~ 45.09% ） and ilmenite （11.67% ~ 13.17% ） which can be used for industrial beneficiation of iron concentrate and titanium concen- trate,respectively. Moreover,the V-Ti magnetite also contains some sulfide minerals such as pyrite,galena, sphalerite and chalcopyrite,etc, which can form the sulfur cobalt concentrate after beneficiation. The V-Ti mag- netite is mainly of disseminated structure with subhedral-anhedral, embedded, sideronitic, metasomatic relict and solid separation textures. The results confirm the materials basis for the comprehensive utilization of this vanadium-titanium magnetite and make clear the structure characteristics of this ore ,which provides important basic information for the establishment of beneficiation processes of this ore.