Microstructural,hydraulic conductivity and geochemical changes of drying mature fine oil sand tailings in column experiments

This study offers new insights into two-lift deposition of mature fine tailings under atmospheric drying. The interaction of newly added lift and former lift(s) was evaluated using column experiments in terms of volumetric water content, electrical conductivity (EC), hydraulic conductivity, geochemistry and microstructure. Water content and EC followed the same trend and decreasing of water content appears to be responsible for significant reduction in EC. Evaporation on top of the column reduced the water content to almost zero. The obtained results support the coupling between the hydraulic and chemical processes that should be considered by active operators.     

某金矿尾矿提纯石英应用对比试验研究

针对某金矿，在回收金银的基础上，对金银浮选尾矿进行云母和长石浮选，以及提纯石英试验，最终获得SiO2品位99.91%的石英产品。提纯石英产品与比利时矽比科矿业有限公司石英产品进行对比试验，通过化学成分、粒度组成、熔制、粘度和热膨胀系数测试对比试验，得出金矿提纯石英达到甚至超过矽比科进口石英产品的各项技术指标。     

垂直水平联合自流排渗在银山矿业尾矿库降渗工程中的应用

为解决江西铜业集团银山矿业尾矿库安全检查中发现的坝体浸润线超高问题，保证坝体稳定性，结合尾矿库现场实际情况，在充分分析不同排渗方式特点的基础上，提出采用垂直水平联合自流排渗方式，并制定了经济合理可行的技术方案。通过浸润线观测数据表明:在落实排渗方案以后，坝体浸润线有明显的下降，坝体局部渗水、沼泽化现象有明显改观，有效地保证了坝体稳定性。     

岩溶区某锰矿尾矿回填区地下水环境数值模拟预测

针对岩溶区某锰矿尾矿回填区渗漏污染地下水问题进行影响预测,运用数值模拟方法,模拟了污染物在岩溶含水层中的时空分布情况。结果表明:在30年的模拟期内,污染物在回填区下游的最大迁移距离为300m,有9个地下水保护目标受到影响,包括分散式饮用水源井及泉水,但未影响到回填区北部的集中式饮用水源保护区。研究结果可为岩溶区的地下水污染预测提供一定的借鉴。     

Effect of geomembrane hole geometry on leakage overlain by saturated tailings

Experiments are conducted to quantify leakage through holes in a geomembrane (GMB) overlain by tailings with 30% fines and underlain by a well-graded gravel. Analytical and empirical equations for predicting leakage through a circular hole are used to analyze the data. Test results show that changing the hole shape from circular to noncircular increases the leakage. Leakage through 2000 mm² triangular, diamond, and square holes are all 15% higher than the 2000 mm² circular hole. An increase by up to 33% is observed for a rectangular hole. The analytical equations for predicting leakage and head loss through a hole given by the modified Rowe-Booker equation are experimentally verified. The spatial distribution of fines content within about five diameters of the hole is shown to have a notable impact on leakage. Up to a 100% increase in leakage is detected due to 3% reduction in the fines content around the hole. For homogeneous tailings, the ratio of head loss within the hole and above the hole to total head loss are independent of consolidation stress and water head and primarily depend on the hole geometry (i.e., shape and size). Finally, the combined effect of tailings thickness and water head on leakage is discussed.     

基于SaaS的尾矿库安全在线监测系统设计及应用

尾矿库监测指标的安全稳定对于矿山在生产安全和环境保护中具有极高的参考价值。但对于我国矿山企业而言，由于受到企业规模、资金能力等因素限制，很多中小矿山企业在尾矿库安全在线监测系统建设过程中进展缓慢。如今，SaaS模式（软件即服务模式）发展迅速，SaaS模式具有互联网、多重租赁、服务、可扩展等特性，能有效解决我国中小矿山企业由于规模小、资金不足导致无法构建尾矿库安全在线监测系统的问题。     

Superabsorbent dewatering of refractory gold concentrate slurries

In this paper, superabsorbent polymer (SAB) dewatering behaviour of selected mineral pulps comprising low-grade, refractory gold flotation concentrate, bio-oxidation product and cyanide leach residue was investigated as an alternative to conventional, gravity thickening. The shear rheology of the resulting sediments was also investigated for pulp handleability. All slurries displayed better SAB-mediated dewatering performance, in terms of reduced processing time, volume minimization and greater water recovery for recycle, in comparison with gravity thickening. Specifically, SAB absorbed >94 wt.% water from the dilute slurries within 30 min of contact time. 45–76 wt.% more water was recovered after 60 min at high supernatant clarity using the SAB dewatering approach compared with gravity settling. The observed non-Newtonian, shear thinning rheological behaviour of SAB-dewatered consolidated slurries, reflecting low to moderate yield stresses in the range 1–40 Pa and shear thinning viscosities (<10 mPa⋅s), indicate their “handleability” in hydro-transport. The cost effectiveness of the SAB dewatering process engendered by its significantly greater water recovery and SAB polymer recovery, regeneration and multiple reuse capacity.     

一种增大尾矿库回水量的方法

在分析尾矿库回水量组成的基础上，以内蒙古锡林郭勒盟地区某湿排尾矿库为例，提出了一种采用悬浮球增大回水量的方法。理论分析和对比试验验证表明，该方法能够大大减少蒸发量，增大尾矿库回水量，操作简单，可在缺水地区的尾矿库运行管理中推广应用。     

辽宁省尾矿库在线安全监测管理平台设计

针对《尾矿库在线安全监测系统工程技术规范》（GB 51108-2015）实施后存在的问题，结合辽宁省尾矿库在线监测工程的现场实际，进行了尾矿库在线安全监测管理平台设计。建立了在线监测平台的设计路线和总体架构，确定了监测平台软件组成、中心版和企业版的程序框图，阐述了数据同步方法、系统部署与用户访问方法，建立了大屏幕拼接系统并讨论了多屏幕处理方法。通过该系统平台可科学研判尾矿库运行的安全状态，为现场尾矿库监管提供有力的技术保障，对于类似尾矿库在线监测工程有一定的适用性。     

水厂铁矿尾矿隔膜泵输送工艺研究与应用

水厂铁矿原尾矿输送工艺系统落后、管理复杂、能耗高、运行成本高，为降低矿山生产成本，对尾矿输送工艺采用隔膜泵进行改造。针对隔膜泵对入料介质的要求，通过对国内众多矿山隔膜泵给料工艺进行考察分析，结合水厂铁矿现场设备和生产实际，提出了尾矿经圆筒筛隔渣生产建筑用砂，隔渣后的尾矿经过深锥浓密机浓缩后给料到隔膜泵进行输送的新工艺。新工艺实施后，隔膜泵入料尾矿浆中+0.833 mm颗粒粒级含量仅为0.61%，基本将 1 mm以上粗颗粒剔除，能够生产出产率8.28%、模数2.5、含泥量2.5%以下的合格建筑用砂。利用改造后的深锥浓密机实现了隔膜泵稳定、均匀给料。新工艺实现了尾矿资源的高效利用，开拓了矿山企业新的经济增长点，同时满足了隔膜泵安全稳定运行的需要。