Electromagnetic control of convective heat transfer during electron beam evaporation: model experiments

The present paper aims to demonstrate that melt-flow during electron beam evaporation can be effectively controlled by using external magnetic fields to considerably reduce the convective heat transfer. We discuss the various effects of a static magnetic field, a static field combined with an applied electrical current, and a rotating magnetic field. We perform model experiments using GaInSn in eutectic composition as a test liquid. The liquid metal is heated locally at its free surface by an electric resistance heater. The results of the measurements are compared to prediction of numerical simulations.     

江西有色金属工业发展循环经济的思考

根据江西有色金属工业发展的形势，着重分析了江西有色金属工业发展循环经济的必要性，并从体制、政策、法律、法规等方面提出了发展江西有色金属工业循环经济的思路，为引导江西有色金属工业循环经济的发展提供政策参考。     

生物吸附法处理重金属废水的研究现状及发展

生物吸附法处理重金属废水是一种很有潜力的新型重金属废水处理技术．近年来，生物吸附方法被大量研究并取得了许多成果，本文从生物吸附机理、影响生物吸附的主要因素、生物材料固定化技术等方面对生物吸附法的研究现状和发展进行了阐述．     

Solidification of Municipal Solid Waste Incineration Fly Ash with Cement and Its Leaching Behaviors of Heavy Metals

The solidifying qffect of cement addition on municipal solid waste incineration fly ash ( MSWFA for short, collected from the gas exhaust system of MSW incinerator), the interaction of MSWFA with cement and water and the leaching of heavy metals from cement-solidified MSWFA are investigated. The main results show that : ( 1 ) when MSWFA is mixed with cement and water, 112 evolution, the formation and volume expansion of AFt will take place, the volume expansion can be reduced by ground rice husk ash addition ; (2) heavy metals do leach from cement-solidified MSWFA and at lower pH more leaching will occur; (3) compared with cement - so-lidified fly ash, the leachate of solidified MSWFA is with higher heavy metal contents ; (4) with the increment of cement addition leached heavy metals are decreased ; and (5) concentrations of Zn , Mn , Cu and Cd in all the leachates can meet the relevant Standards of Japan, but as the regulations for soil and groundwater protection of Japan are concerned, precautions against the leaching of Pb , Cl^- and Cr^6 and so on are needed.     

负载贵金属的层柱分子筛比表面积研究

采用两种矿产钙质蒙脱土为原料制备了两种层柱分子筛（Ａｌ－ＣＬＭ和Ａｌ－ＣＬＢ）。首先考察了焙烧温度对其比表面积的影响，结果发现在３００～５００℃范围内，随着焙烧温度的提高，层柱分子筛的比表面积逐渐增大，６００℃以后比表面积迅速下降；对负载贵金属Ｐｔ或Ｐｄ后其比表面积变化情况的研究表明，不论是Ａｌ－ＣＬＭ还是Ａｌ－ＣＬＢ，负载金属后比表面积均下降，且负载Ｐｔ后比表面积下降均比负载Ｐｄ后比表面积下降得多；在Ｐｔ／Ａｌ－ＣＬＭ比表面积因浸渍液的不同而引起的比表面积变化的研究中，发现用酸性较强的浸渍液（Ｈ２ＰｔＣｌ６·６Ｈ２Ｏ）比用酸性较弱的浸渍液（Ｐｔ（ＮＨ３）４Ｃｌ２）所引起的比表面积下降得多，最后在Ｐｔ（Ｐｄ）／Ａｌ－ＣＬＭ和Ｐｔ（Ｐｄ）／Ａｌ－ＣＬＢ的苯加氢反应中发现苯转化率随着比表面积的增大而上升。     

湖南有色金属工业发展战略评述

概述了湖南有色金属工业发展的基本现状和所存在的主要问题，分析了其面临的战略形势。指出湖南有色金属工业必须走产业结构总体优化、产业全面升级和大集团层面资本运营发展之路，并详细提出了相应的战略措施。     

燃煤飞灰对痕量重金属吸附脱除的研究

煤燃烧过程中生成的飞灰实际上是一种吸附痕量重金属的固体吸附剂，而飞灰结构和组分、灰中含碳量以及烟气温度等因素对飞灰吸附脱除痕量重金属有不同的影响。研究表明，这种吸附脱除机理是一种复杂的物理吸附和化学反应及化学吸附的组合，飞灰本身的结构特性和化学组分对痕量元素的吸附影响很大，烟温也是关键的影响因素，而灰中含碳量对其影响很小。     

纳米结构陶瓷涂层的外圆磨削力以及磨削表面精度的实验研究

使用功率计监测磨削加工的能量消耗，探讨了纳米结构陶瓷涂层的外圆磨削过程；对纳米陶瓷涂层和传统陶瓷涂层在磨削力和磨削表面精度方面进行了比较．磨削实验使用了外圆磨床和陶瓷结合剂金刚石砂轮．通过测量主轴功率获得切向磨削力，讨论了加工参数，如切深、进给率以及砂轮粒度对切向磨削力的影响．还对磨削后的涂层表面用粗糙度仪和扫描电镜进行了评估，揭示了表面粗糙度与加工参数的关系．     

Endogenous Particle Stabilization During Magnesium Integral Foam Production

The production of magnesium integral foam components with a dense shell and a porous core is investigated. High pressure casting methods are used where liquid magnesium mixed with a blowing agent is injected into a permanent steel mould. A compact shell develops due to fast cooling at the walls. Larger cooling times in the core allow the decomposition of the blowing agent and the evolution of a foam structure. The resulting integral foams show a high weight‐specific stiffness combined with high energy absorption capability. For the first time, foam stabilizing without additives is realized. Stabilization is by foaming during solidification with the primary α‐phase particles acting as obstacles slowing down cell wall thinning.