尾矿土变形的应力-渗流-化学耦合模型研究

基于孔隙变化的力学响应方程和尾矿土动态淋溶的实验结果,建立了尾矿沉积土变形的压力-孔隙度-浓度之间的关系,并在此基础上建立了考虑酸溶液作用下尾矿沉积土变形的应力-渗流-化学耦合数学模型。     

Variability in rheology of cemented paste backfill with hydration age,binder and superplasticizer dosages

The use of (CPB) material to ameliorate geotechnical stability of underground mine is in nascent stage in India. Rheological properties of CPB change with travelling time as it is transported to underground mine stope through pipeline reticulation. In this paper, rheological properties of CPB based on mill tailings of a carbonate rich mineral processing waste are evaluated for different dosages of polycarboxylate (PC) based (SP). Each CPB sample having 78?wt% solids is mixed separately with 4%, 6% or 8% of binder dosages (ratio of the weight of dry binder to the weight of dry tailings) and, 0%, 0.5%, or 1.0% of SP dosages as weight of dry binder. The paper presents a methodology for determining yield stress, plastic viscosity and thixotropic behaviour of CPB mixture as a function of hydration age, binder and SP dosages. Results from the experimental campaigns indicate that SP content has significant influence on rheological behaviour of CPB and can be suitably exploited to enhance the flow characteristics of the carbonate rich process tailings. The study also develops multivariate linear regression models of yield stress, plastic viscosity and thixotropy of CPB depending on the hydration age, binder and SP dosages.     

攀钢密地选钛厂4万吨微细粒级选钛工程浮选尾矿治理

简要介绍了攀钢密地选钛厂微细粒级 4万 t选钛工程的基本工艺流程 ,较详细地分析了所设计的尾矿处理设备不能达到生产要求的原因 ,并从理论和实践上提出了解决问题的具体措施     

尾矿库老化程度评价研究

通过对尾矿库老化现象和其机理的研究,提出了尾矿库老化评价体系及评价的方法,并对该技术特性进行了分析,从中得出一些有参考价值的结论,也指出了该技术存在的一些不足之处。     

贵州某氰化尾矿选矿综合利用研究

介绍了贵州某高粘度微细粒浸金尾矿,通过浮选工艺,回收其中的贵金属元素金并脱除有害元素硫、砷。提高了企业的经济效益,降低了尾矿库的环保风险,具有明显的经济效益和社会效益。     

几种离子对新药剂KF201絮凝鲁中铁矿尾矿环水水质的影响

介绍了多种离子对ＫＦ２０１与聚丙烯酰胺按不同方式配合使用絮凝鲁中铁矿尾矿环水水质的影响。试验结果表明,这些离子使沉降速度变慢,浊度降低,对絮凝作用影响较显著;而且ＫＦ２０１与聚丙烯酰胺分别加入比两者混合后加入的絮凝效果好。     

五公里尾矿库的复垦方法

分析了尾矿库基本特征及其对周围环境的影响，并通过结合当地情况对尾矿库进行建筑复垦和农林复垦，成功地防治了环境污染，取得了良好的社会效益和经济效益。     

尾矿再利用的试验研究

红透山铜矿有两座尾矿库，现有存量300万t，每年可增加尾矿量10万t，尾矿中含有黄铁矿、磁黄铁矿，硫品位为6％左右。通过新坝尾矿氧化层、新坝尾矿未氧化层、老坝尾矿、和老坝液体尾矿的试验研究，确定新坝尾矿的未氧化层是最可回收利用的硫资源。这种尾矿在不经磨矿的情况下，小型试验一次粗选硫品位可达到37.918％，二次扫选回收率接近82％。考虑生产上的波动，精矿品位按36％，回收率50％，建1000t／d的选厂，年经济效益为15．8万元。     

A model of seepage field in the tailings dam considering the chemical clogging process

The radial collector well, an important water drainage construction, has been widely applied to the tailings dam. Chemical clogging frequently occurs around the vertical shaft in radial collector well due to enough dissolved oxygen and some heavy metals in groundwater flow of tailings dam. Considering the contribution of water discharge from both vertical shaft and horizontal screen laterals and chemical clogging occurring around vertical shaft well, a new model was developed on the basis of Multi-Node Well (MNW2) package of MODFLOW. Moreover, two cases were calculated by the newly developed model. The results indicate that the model considering chemical clogging occurring around the vertical shaft well is reasonable. Owing to the decrease in hydraulic conductivity caused by chemical clogging, the groundwater level in dam body increases constantly and water discharge of radial collector well declines by 10-15%. For ordinary vertical well, it decreases by 30%. Therefore, chemical clogging occurring around radial collector well can arouse increases of groundwater level, and influence dambody safety.     

遵义锰矿高铁贫锰重选尾矿石的还原焙烧－氨浸法处理

本文报道用还原焙烧－氨浸法处理遵义锰矿高铁贫锰重选尾矿石的试验结果．该产品可供生产中低碳锰铁、金属锰及开发锰盐新产品作原料．产品成本经估算约为９５４元／ｔ．本试验为我国高铁贫锰矿的湿法提锰提供了一条新的途径．