Thermodynamic estimation of minor element distribution between immiscible liquids in Fe-Cu-based metal phase generated in melting treatment of municipal solid wastes.
Thermodynamic estimation of minor element distribution between immiscible liquids in Fe-Cu-based metal phase generated in melting treatment of municipal solid wastes.
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DOI：
10.1016/j.wasman.2012.01.025
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发表时间：
2012-06
期刊：
影响因子：
8.1
通讯作者：
X. Lu;K. Nakajima;H. Sakanakura;K. Matsubae;H. Bai;T. Nagasaka
中科院分区：
文献类型：
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作者：
X. Lu;K. Nakajima;H. Sakanakura;K. Matsubae;H. Bai;T. Nagasaka
从废弃物管理和环境污染控制以及资源保护的角度来看，废弃电子电气设备（WEBs）已成为管理物质循环的重要目标。通过简单的热力学计算，研究了城市生活垃圾（MSW）或焚烧炉灰中有价有色金属（Ni、Co、Cr、Mn、Mo、Ti、V、W、Zr）、贵金属（Ag、Au、Pd、Pt）和其它元素（Al、B、Pb、Si）在富Fe和富Cu金属相中的分布趋势。钢的大多数典型合金元素（Co、Cr、Mo、Nb、Ni、Si、Ti、V和W）和Rh优先分布到富Fe相中。铂族金属，如Au，Ag和Pd，富集在富Cu相中，而Pt几乎均匀地分布在两相中。由于铜的初级冶金处理之后是电解精炼，并且由于粗铜中的铂族金属已在工业上从所得阳极泥中回收，因此我们的研究结果表明，如果可以选择性地收集富铜相，则可以有效地从MSW中回收Ag、Au和Pd。
Waste electrical and electronic equipment (WEEE) has become an important target in managing material cycles from the viewpoint of not only waste management and control of environmental pollution but also resource conservation. This study investigated the distribution tendency of trace elements in municipal solid waste (MSW) or incinerator ash, including valuable non-ferrous metals (Ni, Co, Cr, Mn, Mo, Ti, V, W, Zr), precious group metals (PGMs) originated from WEEE (Ag, Au, Pd, Pt), and others (Al, B, Pb, Si), between Fe-rich and Cu-rich metal phases by means of simple thermodynamic calculations. Most of the typical alloying elements for steel (Co, Cr, Mo, Nb, Ni, Si, Ti, V, and W) and Rh were preferentially distributed into the Fe-rich phase. PGMs, such as Au, Ag, and Pd, were enriched in the Cu-rich phase, whereas Pt was almost equally distributed into both phases. Since the primary metallurgical processing of Cu is followed by an electrolysis for refining, and since PGMs in crude copper have been industrially recovered from the resulting anode slime, our results indicated that Ag, Au, and Pd could be effectively recovered from MSW if the Cu-rich phase could be selectively collected.