四川某铜矿尾矿中金红石工艺矿物学研究

Study on Process Mineralogy of Rutile in a Copper Mine Tailings of Sichuan

为了综合开发利用四川某铜矿尾矿中的金红石,采用化学多元素分析、物相分析、光学显微镜和矿物自动分析仪MLA等分析手段,对铜尾矿中的金红石进行了工艺矿物学研究。研究查明了该铜矿尾矿的矿物组分,金红石的粒度分布、嵌布特征及主要矿物的共生关系;尾矿中TiO2总含量为3.349%,TiO2主要以金红石的形式存在,占64.35%,矿物组成主要是金红石和铌铁金红石,铜尾矿中金红石相矿物粒度较细,主要集中于75μm以下;尾矿中金红石、铌铁金红石矿物的-0.075 mm粒级分别占93.08%及100.00%;大部分金红石矿物与脉石矿物连生、包裹,未裸露,连生体占比高达62.18%;该铜尾矿中的金红石为难选矿物,需采用重选—磁选—电选—浮选联合流程进行回收利用。

In order to comprehensively develop and utilize the rutile in the tailings of a copper mine in Sichuan,the process mineralogy of rutile in copper tailings is studied by means of chemical multi-element analysis,phase analysis,optical microscope and mineral automatic analyzer MLA.The mineral composition of the copper mine tailings,the particle size distribution and dissemination characteristics of rutile,and the symbiotic relationship of the main minerals are identified.The total content of TiO2 in the tailings is 3.349%.TiO2 mainly exists in the form of rutile,accounting for 64.35%.The mineral composition is mainly rutile and ferroniobium rutile.The particle size of rutile phase minerals in copper tailings is fine,mainly concentrated below 75μm.The-0.075 mm fraction of rutile and ferroniobium rutile minerals in the tailings accounted for 93.08%and 100.0%,respectively.Most of the rutile minerals and gangue minerals are intergrown and wrapped,not exposed,and the proportion of intergrown bodies is as high as 62.18%.The rutile in the cop⁃per tailings is a refractory mineral,which needs to be recycled by the combined process of gravity separa⁃tion-magnetic separation-electrostatic separation-flotation.