共查询到17条相似文献,搜索用时 78 毫秒
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铼元素是一种可广泛应用于国防、航空航天以及新型科技领域的重要战略资源。铼元素在地壳中含量极低,是一种稀散金属,需要通过高效的分离富集才能获取。介绍近年来铼金属的冶炼/回收工艺流程及进展,综述近年来铼金属的冶炼/回收工艺流程及其进展,重点介绍可应用于铼富集分离的块体材料、纳米材料、生物质材料、介孔硅材料等新型吸附材料及其在铼一次资源与二次资源的开发与回收中的应用,并对铼富集与分离技术的发展进行展望。 相似文献
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铼作为一种稀有难熔金属,因具有独特的性能使其应用受到重视。在铼资源不足的情况下,从含铼废料中回收铼被认为是获取铼的重要途径之一。本工作选取粉末状、块状以及丝状3种不同形式的钨铼合金废料,进行火法回收铼的研究,对不同工艺参数下氧化焙烧、氨水浸出和蒸发结晶所得回收中间产物NH4ReO4和最终氢还原所得铼粉的性能进行表征。结果表明,钨铼合金废料的形式对铼的回收工艺条件和回收率有明显的影响,未合金化的钨铼合金粉末状废料及合金化后的块状和丝状废料回收时需采用不同的氧化温度,且在不同的温度下Re2O7有不同的挥发率,粉末状、块状以及丝状3种不同形式的钨铼合金废料回收所得铼粉的纯度分别为99.952%、99.939%和99.915%,铼的回收率分别为95.62%,94.57%和91.59%。 相似文献
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《稀有金属快报》2008,27(10):40-40
专利名称:从钼矿中分离钼、铼的方法专利
申请号:200810010264.X 申请日:2008—01—29
公开号:CN101220418 公开日:2008—07—16
专利申请人:辽宁大学本发明涉及一种从钼矿中分离钼、铼的方法。采用的技术方案是:包括试样溶液的制备,取一定量制备的试样溶液,调节溶液的pH值为1-8,然后加入纳米TiO2固体,常温下超声吸附1~3min,静置,离心,上层清液为含铼溶液;沉积物用二次蒸馏水充分洗涤后,加入到浓度≥0.04mol/L的洗脱剂NaOH溶液中,搅匀,超声1-3min,静置,离心,上层清液为含钼溶液。本方法具有操作简单,对钼、铼的分离效果完全,操作过程中没有有机溶剂,只使用少量酸碱调节pH值,因此不会对环境造成污染。 相似文献
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《中国有色金属学报》2017,(6)
利用N_(235)萃取剂,开展含铼钼精矿焙烧烟气淋洗液中铼和钼分离、提取的研究。结果表明:H~+浓度、酸根离子种类和有机相组成都会对钼和铼的萃取率及其分离系数产生较大影响。在硫酸浓度为2.5 moL/L、有机相组成为3%N_(235)+30%仲辛醇+67%煤油(体积分数)条件下,铼的萃取率高、钼铼分离系数大。N_(235)萃取的最优工艺条件为:相比O/A为1:4、萃取平衡时间为2 min、萃取温度为常温。单级逆流萃取铼的萃取率为90.64%,钼的萃取率为10.20%。采用二次三级逆流萃取,铼的总萃取率高达99.41%,而钼的总萃取率仅为11.49%。在此基础上,以氨水为反萃剂,经过浓缩结晶可制得纯度大于99%的高铼酸铵,整个萃取反萃工艺流程铼的综合回收率达到96.04%,实现铼的高效提取。 相似文献
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运用响应面方法和中央复合旋转实验设计方法对辉钼矿生物浸出过程中影响铜、钼和铼浸出的一些工艺条件进行了建模与优化.基于中央复合旋转实验设计方法,考察了3个主要因素对生物浸出的影响,即料液pH值、矿浆浓度、接种体浓度,其值分别为:pH1.46~2.14,矿浆浓度0.95%~11.05%,接种体浓度1.59%~18.41%.根据中央复合旋转设计方法进行20组生物浸出实验.根据所得到的铜、钼和铼浸出率的实验结果,基于3个考察因素对其分别建立了经验公式.在实验条件范围内,根据经验公式采用二次方程对获得最大的铜、钼和铼浸出率的工艺条件进行了优化.结果表明,获得最大的铜浸出率的工艺条件为:pH=1.68,矿浆浓度0.95%,接种体浓度18.41%;在此条件下,钼和铼的浸出率分别为2.18%和24.41%.铜、钼和铼浸出率的预测结果与实验结果吻合较好.考察了生物浸出中黄钾铁矾生成对浸出的影响. 相似文献
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P. E. Churchwood J. B. Rosenbaum 《JOM Journal of the Minerals, Metals and Materials Society》1963,15(9):648-650
A procedure developed by the US Bureau of Mines to recover rhenium in the form of electrolytic flakes by electrowinning the metal from a solvent-extraction strip solution is described. The recovered rhenium contains only about 0.1 % Mo and spectrograph traces of other impurities, such as copper, aluminum, calcium, chromium, iron, platinum, and silicon.The uses and properties of rhenium are discussed, and conventional recovery methods are reviewed. 相似文献
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Rhenium is a unique, valuable and extremely rare chemical element currently used as an alloying element in high-temperature superalloys for aerospace and industrial gas-fired turbines and also as a catalyst in petrochemical industry. Moving towards a more competitive and sustainable economy requires access to this metal in adequate quantities and at competitive costs. However, minerals containing rhenium are generally found in very small quantities and are currently not commercially viable sources. Thus, the method and route for the extraction of primary rhenium is dependent on other metals (copper, molybdenum and uranium) of which rhenium is a by-product. In addition, focusing on alternative sources such as recycling of rhenium from waste alloy scrap and catalysts, is continually gaining attention in the research community. This paper has focused on the assessment of secondary sources of rhenium. The historical cost and also supply interruption indicators of rhenium were examined and assessed. Finally, opportunities of recovering and reusing existing stocks through Industrial Ecology are discussed. 相似文献
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Rhenium is recovered during pyrometallurgical processing of molybdenum sulfide and copper sulfide ores; the traditional technology involves removing rhenium(VII) oxide, Re2O7, from the sulfurous gas phase generated during multiple hearth roasting (in molybdenum processing) and smelting (in copper processing). A new technology platform called Looping Sulfide Oxidation (LSO) has been proposed to produce molybdenum and copper using alternative process chemistries. A detailed thermodynamic study of the reaction conditions used in LSO process indicates that rhenium recovery is possible at higher rates than currently realized in the industry. Conditions at which Re2O7 is reduced to rhenium metal by S2 have been identified and key process conditions are outlined to maximize performance of the LSO scheme and rhenium recovery. 相似文献
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铼及铼合金的应用现状及制造技术 总被引:2,自引:0,他引:2
比较详细地介绍了铼在石油化工、航空航天、冶金工业和电子工业等领域的应用.对铼制品的主要制备方法如电化学沉积法,粉末冶金法,电子束-物理气相沉积法和化学气相沉积法作了系统地总结和分析. 相似文献