新庄孜矿覆土造地综合研究

以新庄孜矿为例,针对覆土造地过程中,对煤矸石充填可能带来的重金属元素的迁移污染做了相关分析,结果表明矿区重金属污染程度不强,工程区地下水质达到Ⅲ类以上.施工过程中采用煤矸石与土的多层结构充填模式,提高了矸石保熵性.采用煤矸石充填塌陷区,既减少矸石山占地面积,又能在塌陷区覆土造地,同时有利于保护环境,具有较大的经济效益、社会效益和环境效益,对淮南矿区覆土造地及工农业持续发展具有重要的示范意义.     

The Chemistry of Waters Associated with Metal Mining in Macedonia

Abstract  Pollution from current and past mining is a significant problem in several parts of the former Yugoslav Republic of Macedonia. Water from six different mining areas in Macedonia was analysed to assess the effects of metalliferous mining activities. Drainage sediments at all locations show evidence of physical and chemical contamination; water compositions, however, were more variable. Low pH water associated with mining has led to the dissolution of minerals and the mobilization of metals from the ores and the host rocks. Only Sb was noted to exhibit enhanced mobility in higher pH waters. The Zletevo Pb-Zn mine discharges low pH water that has high levels of several metals, including Al, Zn, Cd, and Fe; sediment concentrations are grossly elevated for several km downstream. Toranica and Sasa Pb-Zn mines exhibit similar sediment contamination of Pb, Zn, Cd, and other ore-related metals. However, concentrations of metals in waters are far lower at both of these mines, due to less pyrite in the ore and the buffering of the acid waters by carbonate host lithologies. At the Buchim copper mine, waters are both acidic and high in dissolved solids; Cu concentrations exceed 100 mg/L. Krstov Dol and Alshar are small, disused As-Sb mines that discharge waters that exceed potable values for some contaminants (e. g. As), but this may be related to the mineralization of the bedrock rather than the mines. In general, metal concentrations decreased downstream from the source due to dilution from other rivers and coprecipitation of metals on other mineral phases (e. g. Fe-, Al- and Mn-oxides, and hydroxides).     

重介质旋流器流场湍流数值计算模型的选择

简述了重介质旋流器理论研究的现状，给出了计算流体力学基本方程及各种湍流数值计算模型.在相同边界条件下采用k-ε，RNG，RSM三个模型对重介质旋流器流场进行试探性数值模拟，并与相同边界条件的试验测量结果进行比较，最后选定RSM模型用于重介质旋流器流场数值模拟的湍流模型.     

云浮硫铁矿致密块状矿石低成本选矿工艺研究

针对云浮硫铁矿致密块状矿石的工艺特性,在不磨矿的条件下,采用分级、粗粒跳汰-细粒螺旋的重选工艺流程,当原矿含硫28.03%时,获得了含硫37.11%、回收率为84.06%的选别指标,该工艺流程简单、设备投资小、生产成本低,是处理难选低品位硫铁矿有效的手段。     

重型工业主厂房和堆载仓库的地基补强化学灌浆

通过论述重型工业厂房和大面积地面堆载仓库对基产生的不良影响，介绍用水泥－水玻璃化学灌浆进行全面加固，具有快速，有效，经济等优点，值得推广使用。     

袖阀管在潮阳某水库坝基帷幕灌浆中的应用

通过对潮阳某水库坝基帷幕灌浆采用袖阀管灌浆的实例分析,阐明袖阀管灌浆法的施工原理、工艺、实用性及其灌浆效果。     

ZN261系列增压器润滑油泄漏原因及预防

对晋煤集团铁运处目前使用的东风7型机车增压器的结构、原理进行分析，针对ZN261系列增压器润滑油泄漏原因提出了防止润滑油泄漏的建议和措施。     

基于模糊神经网络的重介质密度控制

主要介绍了重介质密度在选煤厂生产过程中的工作原理和重要性 ,并且介绍了神经网络和模糊控制的各自优缺点 ,以重介质密度为控制对象 ,设计了一种模糊神经网络 ,能够满足系统控制的实时性和准确性。     

工程机械动力换挡变速箱在防爆齿轨机车中的应用

介绍一种使用工程机械动力换挡变速箱的新型防爆柴油机牵引机车的特点和使用情况     

微孔精密过滤机处理重金属废水

介绍微孔精密过滤机处理重金属废水新技术。采用微孔PE管压滤机可对化学处理后的重金属废水进行高效精密固液分离与污泥脱水。微孔PE管精密过滤机过滤分离效率高、效果稳定,重金属废水经一次过滤可达到排放要求,能对污泥脱水,渣干度达30%~40%,操作迅速、方便、机械化程度高,使用寿命长,占地面积小,动力消耗省。国内已有1000多家企业成功应用。