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电子垃圾的快速增长给我们带来困扰的同时也给我们提供一座资源丰富、价值极高的“城市矿山”;通过环保的科学手段获取其中的可用资源是处理电子垃圾的最终目的。文章介绍了目前从废旧印刷电路板中回收贵金属的4种主要技术,分析了各类技术的优缺点,展望了未来回收技术的发展趋势。 相似文献
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本文综述了目前废弃电路板电子元件和焊锡的分离回收技术,即湿法和机械法,并对现有技术技术的特点进行了分析。 相似文献
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研究了金川高锍磨浮磁选1次及2次铜镍合金,在沸腾状态下自热、常压、控制电位氯气浸出富集贵金属新技术,获得了满意结果,Cu、Fe、Ni浸出率〉99%,贵金属在浸出渣中得到有效富集,列举了工厂扩大试验及半工业性 试验结果。 相似文献
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IBC Advanced Technologies’ Molecular Recognition Technology(MRT) products,trade named SuperLig,selectively and rapidly bind with target metal ions to remove them from solution.The MRT process can produce a high purity separation product of maximum added value at low cost.In this paper,applications of MRT in the precious metals industry,including selective commercial separations involving Au,Pd,Pt,Rh,and Ru,are described and discussed.Application of MRT to the analytical determination of precious metals is presented.Potential use of MRT in recovering precious metals from end-of-life(EOL) products is discussed. 相似文献
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本文介绍了Kaldo炉的结构,详细阐述了贵金属冶炼厂利用Kaldo炉技术从阳极泥中提取稀贵金属工艺主要过程. 相似文献
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本文系统分析了高离子强度下含Pb2 、Cl-、SO42-酸性溶液各离子间的平衡,计算出不同条件下PbCl2、PbSO4在高Cl-、SO42-的酸性溶液中的溶解度(mol/L).绘制出25℃下,氢离子浓度分别为7.5、5、2.5、1、0.1(mol/L)时,PbCl2、PbSO4的溶解度(mol/L)随总硫酸根浓度[SO42-]T 和游离氯离子浓度[Cl-]的关系曲面.PbCl2、PbSO4的溶解度曲面在高酸度的条件下有一交线.根据浓度积原理,将优先析出溶解度小的物质,即较低曲面所表示的物质.将各条件下,两曲面的交线对底面做投影,由投影得到的溶解平衡曲线图便可根据溶液的组成及温度条件判断出溶液中的Pb2 的析出形式.结果表明:在含Pb2 、Cl-、SO42-酸性溶液中,[H ]≥7.5mol/L、[Cl-]>2.5mol/L时,溶液中PbCl2的溶解度小于PbSO4的溶解度,PbCl2较PbSO4优先析出;随着[H ]的减小,PbSO4 的溶解度逐渐减小, PbSO4较PbCl2优先析出的范围增大;[H ]=0.1mol/L时,仅仅在硫酸根浓度非常低,游离氯离子浓度非常高时,才可能优先析出PbCl2;[H ]≤ 0.01mol/L时,在[SO42-]T 、[Cl-]可能达到的范围之内,都将优先析出PbSO4.从而较好地解释了在控制电位选择性氯化浸出高品位含金物料工艺中,分离铅时,加入了大量的SO42-,而析出铅渣99%以上是PbCl2的事实. 相似文献
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研究了含贵贱金属及其金属氧化物两种体系用HCl气氯化焙烧分离贵贱金属的规律并分析氯化过程机理,结果表明,干氯化氢是优良的氯化剂,在400-500℃氯化金属体系和500℃配一定量炭时氯化金属氧化物体系均可实现贵金属的高倍富集。 相似文献
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贵金属二次资源化技术进展 总被引:1,自引:0,他引:1
阐明了贵金属二次资源的再生背景、意义及废料的主要来源,总结了目前国内外从贵金属二次资源中再生责金属的火法冶金处理技术、湿法冶金处理技术和生物处理技术的研究成果,并作了分析比较.在不断追求经济有效、环境友好的金属再生技术的基础上,对各种技术进行优化组合,实现贵金属高效再生. 相似文献
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Novel Application of Glass Fibers Recovered From Waste Printed Circuit Boards as Sound and Thermal Insulation Material 总被引:1,自引:0,他引:1
Zhixing Sun Zhigang Shen Shulin Ma Xiaojing Zhang 《Journal of Materials Engineering and Performance》2013,22(10):3140-3146
The aim of this study is to investigate the feasibility of using glass fibers, a recycled material from waste printed circuit boards (WPCB), as sound absorption and thermal insulation material. Glass fibers were obtained through a fluidized-bed recycling process. Acoustic properties of the recovered glass fibers (RGF) were measured and compared with some commercial sound absorbing materials, such as expanded perlite (EP), expanded vermiculite (EV), and commercial glass fiber. Results show that RGF have good sound absorption ability over the whole tested frequency range (100-6400 Hz). The average sound absorption coefficient of RGF is 0.86, which is prior to those of EP (0.81) and EV (0.73). Noise reduction coefficient analysis indicates that the absorption ability of RGF can meet the requirement of II rating for sound absorbing material according to national standard. The thermal insulation results show that RGF has a fair low thermal conductivity (0.046 W/m K), which is comparable to those of some insulation materials (i.e., EV, EP, and rock wool). Besides, an empirical dependence of thermal conductivity on material temperature was determined for RGF. All the results showed that the reuse of RGF for sound and thermal insulation material provided a promising way for recycling WPCB and obtaining high beneficial products. 相似文献