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首页> 外文期刊>Metallurgist >DEVELOPING A TECHNOLOGY FOR RECYCLING AUTOMOTIVE EXHAUST-GAS CATALYSTS
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DEVELOPING A TECHNOLOGY FOR RECYCLING AUTOMOTIVE EXHAUST-GAS CATALYSTS

机译：开发一种回收汽车尾气催化剂的技术

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摘要

Methods of recycling platinum-group metal (PGMs) and recovering them from spent automobile catalysts are described in detail. The results of an analysis are used to recommend a method that entails pyrolytic concentration in an electric furnace and subsequent electrochemical separation. Test specimens of metal and slag were studied by x-ray fluorescence analysis (XRF), atomic-absorption spectroscopy (AAS), and inductively-coupled plasma mass spectrometry (ICP-MS). XRF is a quick and inexpensive method of determining PGMs in catalysts only when calibrated specimens are available, while AAS is suited only for determining rhodium and palladium in specimens of catalysts and metals. The ICP-MS method is well-suited for determining PGMs in catalysts and products obtained from their recycling and is indispensible for analyzing slags. A series of heats was performed in an ac furnace to find the most effective method of introducing a collector-metal to precipitate PGMs. Analysis of the heats showed that briquetting reduces the amount of metal recovered somewhat due to an increase in the temperature of the melt. The addition of a collector-metal to the briquettes decreases the volume of dust-gas emissions and increases PGM yield. The largest amount of PGMs is recovered when iron-ore concentrate and a reducing agent are used as the collector-metal.
机译：详细介绍了回收铂族金属（PGM）并将其从废旧汽车催化剂中回收的方法。分析结果用于推荐一种方法，该方法需要在电炉中进行热解浓缩并随后进行电化学分离。通过X射线荧光分析（XRF），原子吸收光谱（AAS）和电感耦合等离子体质谱（ICP-MS）研究了金属和矿渣的试样。 XRF是一种仅在有标本的情况下测定催化剂中PGM的快速而廉价的方法，而AAS仅适用于测定催化剂和金属样品中的铑和钯。 ICP-MS方法非常适合测定催化剂和回收利用的产物中的PGM，对于分析炉渣也是必不可少的。在交流熔炉中进行了一系列加热，以发现引入收集器金属以沉淀PGM的最有效方法。对热量的分析表明，由于熔体温度的升高，团块降低了回收的金属量。向团块中添加金属捕集剂可减少烟尘排放量并提高PGM产量。当铁精矿和还原剂用作集电金属时，回收的PGM量最大。

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