云南某含金硫精矿“焙烧-氰化”渣工艺矿物学研究及可选性分析  

Process Mineralogy Research of Roasting-Cyanidation Residue of a Gold-bearing Sulfur Concentrate in Yunnan

作　　者：龚明辉 郑海雷[2] 高起方 李文博 戴惠新[1] GONG Minghui;ZHENG Hailei;GAO Qifang;LI Wenbo;DAI Huixin(Faculty of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Yunnan Gold Ming Group Co.,Ltd.,Kunming 650200,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]云南黄金矿业集团股份有限公司,昆明650200 [3]东北大学资源与土木工程学院,沈阳110819

出　　处：《有色金属(选矿部分)》2025年第3期25-34,共10页Nonferrous Metals(Mineral Processing Section)

基　　金：国家自然科学基金面上基金资助项目(52174242);国家重点研发计划项目(2022YFC2905800)。

摘　　要：云南某含金硫精矿“焙烧—氰化”渣TFe含量为56.47%,FeO含量为2.30%,有害元素S含量为1.74%,主要脉石矿物SiO_(2)含量为6.44%。为综合利用该铁资源,研究采用化学物相分析、矿物自动分析系统(MLA)、扫描电子显微镜(SEM)、能谱分析仪(EDS)等多种检测手段,对该含金硫精矿焙烧后的氰化渣开展了化学组成、物相分析、矿物组成、主要元素赋存状态、产出及嵌布特征、粒度分布与解离特征以及差热分析等方面的系统研究。研究表明,该“焙烧—氰化”渣的金属矿物主要为磁铁矿、赤铁矿(含磁赤铁矿),含量分别为38.46%和37.11%,其次为褐铁矿,含量为5.85%,主要脉石矿物为石英、黑云母,含量分别为4.08%和4.06%,其次为硅酸盐类矿物橄榄石、蛇纹石,含量为2.79%,其余脉石矿物种类多,含量少。富氧化焙烧处理后的矿物颗粒表面疏松,呈多孔状、蜂窝状、网眼状产出,孔隙被脉石矿物充填,结合紧密。各铁矿物嵌布粒度细微,与脉石矿物连生关系复杂,以多种形态紧密连生,该资源属典型的细粒、微细粒级复杂难选铁资源,采用传统物理方法难以实现矿物的单体解离,无法获得高质量的铁精矿。据此初步拟定“磁选—磁化焙烧—磁选”以及“磁化焙烧—磁选”工艺作为该焙烧氰化渣中铁资源高效分离富集的重点研究方向。研究结果可为后续制定和开展科学合理的铁资源高效综合回收试验方案提供关键理论支撑。The content of TFe,FeO,harmful element S and main gangue mineral SiO_(2) in the‘roastingcyanidation’slag of a gold-bearing sulfur concentrate in Yunnan is 56.47%,2.30%,1.74%and 6.44%,respectively.In order to comprehensively utilize the iron resources,this study adopted chemical phase analysis,mineral automatic analysis system(MLA),scanning electron microscope(SEM),energy dispersive spectrometer(EDS),and other detection methods to systematically investigate the chemical composition,phase analysis,mineral composition,occurrence state of main elements,output and dissemination characteristics of the cyanide slag as well as particle size distribution and dissociation characteristics of gold-containing sulfur concentrate.The results showed that the metal minerals in the“roasting-cyanidation”slag were mainly magnetite and hematite(containing magnetite and hematite),with contents of 38.46%and 37.11%,respectively,followed by limonite with contents of 5.85%.The main gangue minerals were quartz and biotite with contents of 4.08%and 4.06%,respectively,followed by silicate minerals olivine and serpentinite with contents of 2.79%.The rest of the gangue minerals had many kinds and less content.The mineral particles after rich oxidation roasting treatment were all loose on the surface,appearing in porous,honeycomb and mesh shapes.The pores were filled with gangue minerals and tightly bonded.Each iron mineral had a fine particle size and a complex relationship with gangue minerals,closely interconnected in various forms.This resource belonged to a typical fine-grained and micro sized complex and difficult to select iron resource,and traditional physical methods were difficult to achieve single mineral liberation,making it impossible to obtain high-quality iron concentrate.Based on this,the preliminary development of“magnetic separation-magnetization roasting-magnetic separation”and“magnetization roasting-magnetic separation”processes was proposed as the key research directions for efficient separation and enrichme

关 键 词：硫精矿“焙烧—氰化”渣 高温富氧焙烧制酸 复杂难选铁资源 悬浮磁化焙烧—磁选 

分 类 号：TD912[矿业工程—选矿] TD913