摘要:
通过对攀西红格橄辉岩型钒钛磁铁矿原矿进行X射线荧光光谱分析、X射线衍射光谱分析、原矿矿物组成分析等工艺矿物学研究,可知原矿中主要有价金属元素为铁和钛,可考虑将铁和钛综合利用。原矿中主要有价组分为磁铁矿和钛铁矿,主要脉石矿物为绿泥石(由橄榄石、长石蚀变而成)、角闪石和榍石,另含有少量辉石、石英和云母。原矿中的铁组分主要为磁性铁,富集于钛磁铁矿中,而钛则富集于钛铁矿中。从原矿筛析结果可知,其各粒级铁、钛分布比较均匀,但细粒级(-0.038 mm)的TiO2、TFe、MFe品位较低。根据原矿性质,采用阶磨阶选的选铁流程进行试验,结果表明,使用磁选柱进行精选后,获得铁精矿TFe品位可达55.62%,回收率可达50.12%,实现红格低品位橄辉岩型钒钛磁铁矿中铁的有效回收利用。将两段弱磁选尾矿作为选钛给矿,回收其中的钛组分,实现综合利用。
Abstract:
In this paper the olivine type of vanadium-titanium magnetite had been analyzed by X-ray fluorescence spectrum and X-ray diffraction spectrum to identify the raw ore mineral compositions. The main valuable metal elements in raw ore are iron and titanium,thus comprehensive utilization of iron and titanium can be considered.The main useful minerals are chlorite（from olivine and feldspar to chlorite）,amphibole and sphenite,and a small amount of pyroxene,quartz and mica present.The iron component in raw ore is mainly magnetic iron,which is concentrated in titanomagnetite,while titanium is concentrated in ilmenite.Crushing results of raw oreshow that the distribution of iron and titanium of each grain grade is relatively uniform,but the TiO2,TFe and MFe of fine grain grade（-0.038 mm） are relatively low.Based on raw ore nature,the step grinding experiment to separate iron was carried out.The results show that after using the magnetic separation column for selection,the iron concentrate TFe grade can reach to 55.62%,the recovery rate can reach to 50. 12%. The effective recycling of iron in Olivine type of Vanadium-Titanium magnetite in Hongge can be achieved.The two-stage weak magnetic separation tailings are fed as titanium separation,and the titanium concentrate is recovered,which achieve comprehensive utilization of raw ore.
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