炼铜尾渣提取重介质产品的特性及矿物学分析

Characteristics and mineralogical analysis of dense medium extracted from copper slag tailings

资源绿色开发和冶炼废渣的高效利用已成为战略技术的需求。本文结合炼铜尾渣的矿物学性质和重介质选矿的现实需求,采用分级-磁选-浓缩脱泥流程获得炼铜尾渣重介质产品,采用化学分析、XRD、SEM和EDS等手段,研究了其化学成分、物相组成及残余铅锌杂质的矿物学特征,探讨了炼铜尾渣重介质产品应用的环境影响。研究表明,重介质产品密度为4.42 t/m^(3),铁(TFe)含量为56.57%,SiO_(2)含量为23.49%,少量Pb、Zn、Cu等金属杂质;主要矿物为磁铁矿、铁橄榄石、铅铁硅质玻璃体和石英,含量达99.41%。因磁铁矿和铁橄榄石的嵌布粒度较细,解离度低,磁性物含量可达95.4%,便于回收使用;残余铅锌铜重金属元素溶出率很低、环境影响风险较小。研究结果为炼铜尾渣的资源化应用开辟了新的途径。

Green development of resources and efficient utilization of smelting slag are increasingly becoming strategic technical requirements.In this paper,combining the mineralogical properties of copper slag tailings and the actual demands of dense medium beneficiation,the process by classification-magnetic separation-concentration desliming is used to obtain copper slag tailings dense medium products,and chemical analysis,XRD,SEM and EDS are used to investigate.The chemical composition,phase composition and mineralogical characteristics of residual lead and zinc impurities are discussed,and the environmental impact of the application of heavy medium products in copper slag tailings is discussed.The research shows that the density of dense medium product is 4.42 t/m^(3) as well as it contains 56.57%iron(TFe),23.49%SiO_(2),and a small amount of metal impurities such as Pb,Zn,Cu.The main mineral in the products are magnetite and iron olivine,lead-iron-silica glass body and quartz,the content reaches 99.41%.Because the particle size of magnetite and iron olivine is finer,the dissociation degree is lower,and the content of magnetic substance can reach 95.4%,which is convenient for recycling.The residual lead,zinc,and copper heavy metal elements have a low dissolution rate and a low risk of environmental impacts,which opens up a new way for the resource utilization of copper slag tailings.