排渗设施部分失效下的尾矿库放矿渗流分析

为研究排渗设施部分失效条件下放矿对尾矿库渗流场的影响,以河南省某钼矿尾矿库工程为例,基于渗流有限元分析理论,研究特定条件下放矿量对尾矿库渗流场的影响。结果表明:排渗席垫渗透系数降为0.8倍时,设计放矿强度下放矿不超过7 d,仍然能满足尾矿库安全需求;越靠近放矿口处,渗流场受到放矿强度的影响越大;放矿强度超过入渗强度时,矿浆水部分渗入堆积坝内,另一部分汇入库中。研究成果可为矿山企业安全生产及尾矿库安全运行提供参考。     

立式砂仓全尾砂絮凝沉降试验研究

某矿临时充填系统充填骨料采用机械浓缩脱水,能耗高,效率低,产能小,无法满足深部矿山项目配套的永久充填系统的大能力全尾砂充填需要,综合考虑充填成本和效率,通过研究全尾砂在立式砂仓内进行快速浓缩沉降,实现连续放砂连续充填。在分析絮凝沉降试验和絮凝剂选型的基础上,进行全尾砂絮凝沉降定性、定量试验加以优化选择,试验表明：在供砂浓度为15%时,添加500万分子量的阴离子聚丙烯酰胺(APAM)5g/t,可实现全尾砂沉降速度686.89cm/h,添加成本仅为0.16元/t,确定该矿山全尾砂沉降浓缩的最佳工艺,所得出的主要参数指标可为永久充填站设计和建设提供主要依据。     

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。     

多策略灰狼算法优化SVM的尾矿坝地下水位预测

为实现尾矿坝地下水位预测及预报预警,以尾矿坝地下水位为研究对象,将库水位、最小干滩长度等5个变量作为影响参数,尾矿坝地下水位为输出变量,建立支持向量机(SVM)预测模型.引入多策略改进的灰狼优化算法(MGWO)确定SVM模型参数,并以工程实例进行仿真预测.结果表明,MGWO?SVM模型平均相对误差0.24％,平均绝对误...     

Oxygen-18 and Deuterium Fingerprinting of Tailings Seepage at the Sullivan Mine

Stable isotopes of water, ¹⁸O and ²H, were used to fingerprint and quantify the origin and percentage of mixing between tailings pond effluent, seepage collection waters, and background waters at the Sullivan Mill Site, which is located in Kimberley, British Columbia, Canada. The old iron and siliceous ponds are covered by a layer of permeable float rock, which allows meteoric waters to directly infiltrate without undergoing evaporation. In contrast, the east gypsum pond is covered with a layer of till and vegetation, which causes meteoric waters to pond and subsequently be subjected to evaporative processes. The different evaporative environments result in distinctly different isotopic compositions for the waters collected from these sources. The difference in surface cover was used advantageously to identify particular isotopic ratios for the different tailings sources. Water collected from the east gypsum pond is relatively enriched in the heavier isotopes (δ¹⁸O and δ²H), whereas water collected from various locations in the siliceous and old iron pond are relatively depleted in δ¹⁸O and δ²H. The various seepage collection waters were observed to plot at intermediate positions, corresponding either to the old iron pond mixing line, the gypsum pond evaporation line, or somewhere between the two.     

Polarimetric Classification in a Tailings Deposition Area at the Timika Mine Site, Indonesia

Abstract.  Preliminary results indicate that polarimetric synthetic aperture radar (SAR) data can be useful in characterizing remote tailings sites in Indonesia. Recent launches of polarimetric radar satellites offer new opportunities to use such data. Wishart polarimetric radar classification was used to map tailings conditions and vegetative stress. We assessed the accuracy of our analysis and found that almost all scatterers could be discriminated properly, and that the technique was particularly useful in distinguishing saturated versus relatively dry tailings. Since tropical regions are subject to severe atmospheric disturbances, tailings stability is a major issue; there is thus high potential value in using radar remote sensing to aid revegetation and tailings stabilization.     

某钒钛磁铁矿尾矿中钛铁矿的选矿研究

某钒钛磁铁矿尾矿品位较低,TiO2品位为3.2%,试样中钛铁矿的含量为5%。试样中TiO2在细级别中分布较多。试样经磁选预选可有效的抛除大量尾矿,钛粗精矿经分级后的重选效果较好,然后采用高压电选工艺,可获得品位大于38%的钛精矿。"磁选-重选-电选"综合条件试验可获得TiO2品位为39.28%,回收率13.87%的钛精矿。     

某铜钼尾矿中金红石的浮选回收试验

某铜钼尾矿粒度较细,-0.074 mm粒级占68.63%,金红石含量为0.31%,在0.037~0.010 mm粒级有明显的富集现象,单体解离度达72.80%;脉石矿物以石英为主,还有少量易泥化的绿泥石和粘土矿物。为了提高资源的综合利用率,低成本、高效地回收该尾矿中的金红石,在不磨矿的情况下,采用2粗1扫4精、扫选精矿与精选1尾矿合并精选后返回、其他中矿顺序返回的流程对金红石进行了选矿试验,最终获得了Ti O2品位为64.59%,回收率为77.25%的金红石精矿,较好地实现了金红石的回收。     

青海低品位磷灰石型磷矿浮选试验研究

对青海某低品位磷灰石型磷矿进行了浮选试验研究。原矿经粗磨后, 可抛除约20%的粗粒黑云母和透辉石。抛尾后试样经再磨后, 采用氧化石蜡皂和2^#药作为捕收剂, 在无碱条件下, 开路试验获得的磷精矿P₂O₅品位为35.41%、P₂O₅作业回收率为87.24%。闭路流程试验获得了磷精矿P₂O₅5 32.01%、P₂O₅作业回收率达97%的良好结果。采用可溶性淀粉可有效抑制磷精矿中的含镁矿物, 从而获取合格的磷精矿。     

某选镍尾矿再回收镍的研究

对某选镍尾矿进行了再回收镍的选矿试验研究。针对该尾矿的矿石性质,确定了优化的浮选工艺条件和工艺流程,实现了对选镍尾矿中镍的再回收。闭路试验从镍品位0.24%的尾矿中得到了镍品位2.18%、回收率36.15%的镍精矿,取得了不错的镍回收效果。