钼尾矿中有价金属的综合回收研究现状

随着钼产业的快速发展,大量钼尾矿逐年堆积,对自然生态环境造成了严重的污染.钼尾矿因原矿矿石性质、所用工艺等差异呈现不同的特性,但均含有钼、钨、铁等多种有价成分,是一种可利用的二次矿产资源.从钼尾矿中回收共伴生的有价金属是综合利用的一个关键环节.本文综合评述了钼尾矿的资源特点,并详细地总结了近年来回收共伴生有价金属的生产...     

某金浸渣氧化焙烧—浸出提金工艺试验研究

江西某黄金冶炼厂的金浸出尾渣中Au的品位为2.7 g/t,具有较高的回收价值.但该浸出渣中有害杂质S、As的含量高达7.54％、1.98％,主要以黄铁矿和毒砂的形式存在,二者内部包裹的金颗粒在超细磨条件下也极难解离.为有效回收该尾矿渣中的金,基于试样性质,采用氧化焙烧—浸出的工艺处理该试样.浸出试验在溶液pH值为12、...     

无人机在尾矿库健康监测中的应用研究

针对传统的尾矿库健康监测方法不能直接、有效地开展危险性评价,在矿山安全生产工作中无法实现动态综合管理,基于无人机倾斜摄影测量技术和地理信息系统技术,对甘肃省玛曲县某金矿尾矿库进行了健康监测应用研究。通过对无人机影像处理获取了尾矿库的正射影像图(DOM)、数字表面模型(DSM)和实景三维模型等基础空间地理信息数据,具有较好地可视化效果,能够直观地辨识尾矿库周围的危险源;并对尾矿库进行洪水淹没区域分析和库容量计算,更好地掌握了尾矿库目前运行的健康现状,为尾矿库灾害风险早期识别和防灾减灾救灾工作提供科学依据。     

尾砂粒度对充填体早期强度影响的试验研究

为提高铁矿全尾砂的回填利用率,实现全尾砂胶结充填在矿山的有效应用,选择冀东地区全尾砂为试验材料,在分析物化性质的基础上,设计了灰砂比为1:6、1:12、1:20和质量浓度为65％、70％、75％的强度试验,结合XRD能谱和SEM扫描电镜分析,研究了尾砂粒度对充填体早期强度的影响规律,以及对水化产物和孔隙结构的影响.研究...     

利用硫铁矿尾矿制备微晶玻璃

以硫铁矿尾矿制备微晶玻璃,并用DTA、XRD、SEM等手段分析了微晶玻璃的相变、相组成及微观结构。结果表明,利用硫铁矿尾矿为主要原料,添加适量的其他原料,可获得主晶相为透辉石相的微晶玻璃。     

钒钛磁铁矿尾矿综合利用研究进展

目前综合利用钒钛磁铁矿尾矿的方法主要分为两大类：尾矿再选（有价金属回收）和整体利用。根据尾矿性质与组分的不同,尾矿再选主要是采用重选、磁选、浮选、化学选矿和联合分选等选矿工艺,对尾矿中有价元素进行回收;整体利用主要是用尾矿制备建筑材料、陶瓷和瓷砖等,该方法能大量消纳尾矿,可有效解决尾矿堆存问题。基于已有的研究工作,指出对尾矿"物性"（物理化学性质）的研究是实现尾矿中有价元素回收的基础,加强联合分选工艺、细粒级有用矿物回收技术及新设备的研究是今后综合利用钒钛磁铁矿尾矿的发展方向。     

Ultrasound treatment on tailings to enhance copper flotation recovery

As ore grades fall, the amount of tailings production for the same copper production is expected to rise. Flotation recovery of copper sulfide from the El Teniente plant has deteriorated in recent years, in this regard ultrasound treatment of tailings for enhanced copper recovery was evaluated in laboratory experiments. The impact of the ultrasound wave was examined under different conditions, with the conclusion that improved recovery occurs when ultrasound is applied during conditioning and flotation. The results can be explained by the effect of acoustic cavitation that cleans particle surfaces and minimizes slime coatings, facilitating the action of the reagents. In this way, improvement in copper recovery of up to 3.5% were obtained.     

从浮选尾矿中回收含金黄铁矿实践

对河南金源金矿浮选尾矿采用螺旋溜槽粗选、摇床精选重选工艺进行二次回收,得到含金硫精矿,取得了较好的经济效益,每年可为企业获得约1 660万元利润。     

Utilisation of iron ore mine tailings for the production of geopolymer bricks

This study presents a methodology for making bricks, in a cost-effective and environmentally friendly manner, using the tailings produced from iron ore mines in Western Australia (WA). The study was based on the geopolymerisation process, which is known to conserve energy by reducing the emission of greenhouse gases. The reduction is accomplished by avoiding the processes of high temperature kiln firing, traditionally utilised when making bricks from sandy soils with high clay content. In this study, the sodium silicate was added to the mine tailings in powder form, as an activator for the formulation of the geopolymer bricks. The effects of the initial setting time, curing temperature, curing time and activator content on the unconfined compressive strength (UCS), water absorption and other durability properties of the bricks were investigated. X-ray diffraction analysis was performed to investigate the phase composition of the geopolymer bricks. The bricks achieved an UCS as high as 50.53 MPa for the optimum values of the parameters. Technically, the geopolymer bricks that were produced met both the American Society of Testing and Materials and the Australian Standards (AS) requirements for bricks. A cost analysis of the geopolymer bricks is also presented, and this shows that the cost of geopolymer bricks is lower than that of the commercial, fired clay bricks.     

基于FLUENT的全尾砂充填管道输送模拟试验与分析

以大红山铜矿为实例,运用FLUENT软件对全尾砂管道输送进行数值模拟和分析。在充填料浆力学参数基础上建立了数学模型,分别分析了充填料浆的浓度、流速、管径3个因素对管道输送的影响状况,最后选出最优参数。分析结果与大红山铜矿的实际相符合,同时表明FLUENT软件可以用来模拟计算矿山充填管道输送。模拟试验方法可为其他类似矿山参考借鉴。