三峡库区滑坡发育分布规律与防治对策研究

三峡库区(湖北段)是地质灾害极易发区,以滑坡为研究对象,探讨滑坡形成的特殊地质环境,统计分析滑坡发育分布规律,对比水库回水条件下的斜坡变形破坏特征,提出滑坡防治对策。     

Channel planform change on the river dee meanders, 1876–1992

Channel planform change was investigated along an 18 km section of the River Dee on the Welsh-English border by overlaying information from historical maps and air photographs. The information on river planform change spans the last 115 years, during which time the river has been subject to increasing flow regulation, which may have affected its planform. The downstream location of the reach provides two additional factors which may have an impact on the nature and rate of planform change through their influence on energy conditions in the reach: a tidal backwater influence on the downstream section of the reach; and a low angle of slope. The reach has shown very small changes in planform over the last 115 years, which have been successfully identified by a geographical information system (GIS)-based data handling methodology, which not only allows the estimation of a variety of indices of change, but also supports the estimation of the potential errors associated with registering the historical sources to a common base and digitizing the channel boundary locations. The study is successful in identifying channel planform change because it has utilized a GIS-based as opposed to a manual approach, but it represents the lower limit to which bank movement can be confidently identified in a low-power river environment from 1:10000 scale sources. The changes identified by the GIS-based methodology include a decrease in channel mobility in a downstream direction; a predominantly oscillatory movement pattern in locations where channel movement has occurred; and an apparent propagation of a decrease in channel width downstream through the reach during the period since 1949, which is the main period of increasing flow regulation.     

自动化系统在回水处理中的开发与应用

详细介绍了云南驰宏锌锗有限公司昭通选矿厂回水处理系统工艺流程以及自动化系统的设计思路,着重阐述了回水控制系统的控制方案、应用情况以及特点,尤其是回水的关键指标控制采用了新的控制算法,经过现场实践运行,提升了回水的技术指标,提高了回水的利用率。     

回水对金堆城钼矿选矿过程的影响

研究了回水对金堆城钼矿选矿过程的影响,研究结果表明:回水对分级过程影响较大,对浮选作业有一定影响.该研究对现有选厂提高技术指标和新工艺研究及新选厂避免回水的负面影响有一定参考价值.     

云南玉溪胶磷矿回水试验研究

针对胶磷矿选矿回水成分复杂、利用率低等问题,对云南玉溪胶磷矿进行了回水试验研究。试验探索了Ca2+、Mg2+、SO42-、PO43-对选别指标的影响,结果表明这些离子对选别指标均有一定影响,其中Ca2+、Mg2+影响最为严重。经多种方法对比,表明采用"双碱法"+PAM混凝法可有效去除回水中的各种有害离子,处理后回水浮选接近清水指标,取得了较好的净化效果。     

白钨选矿回水在高滑石钼矿选矿中的应用研究

河南某高滑石型钼铁矿采用先脱滑石后浮选钼工艺,为综合回用尾矿库白钨选矿回水、缓解该地区选矿用水紧缺的问题,对白钨选矿回水用于钼矿选矿进行了试验研究,结果表明:直接使用白钨选矿回水进行脱泥浮选,造成钼损失过大;使用白钨选矿回水磨矿后将矿浆pH值调至6,对脱泥粗精矿产品添加CF抑制剂进行脱泥精选,最终闭路试验得到钼损失率4.52%、钼粗精矿品位4.23%、回收率75.85%的良好指标,白钨选矿回水得以利用。     

微细粒贫铁矿石选矿技术攻关及工业实践

针对包钢白云鄂博西矿铁矿石中铁矿物嵌布粒度微细、需细磨至-45μm占85%才能有效解离的性质特点研究开发出了干式预选抛尾-阶段磨矿弱磁选、二段弱磁精上高频细筛(0.075 mm)、筛上产品再磨新工艺,尾矿高效浓缩干排干堆技术、回水净化技术及超长距离精矿矿浆输送技术并成功工业应用,实现了该类型铁矿石资源的高效开发利用。     

焦化废水生化处理后用于选矿工艺的试验研究

文章通过焦化生化处理水和选矿的尾矿库回水对碳钢的腐蚀试验,以及用于选矿浮选工艺的对比试验,分析说明了焦化生化处理出水用于选矿浮选工艺的可行性。     

热水供暖系统连续运行质调节

根据室外温度的变化,对连续运行的热水采暖系统进行经常性的质调节,达到既保证供暖质量,满足使用要求,又能取得很好的节能效果。