BAM Federal Institute for Materials Research and Testing, Division 4.3 Contaminant Transfer and Environmental Technologies, Berlin, Germany.
Waste Manag. 2013 Apr;33(4):942-7. doi: 10.1016/j.wasman.2012.12.025. Epub 2013 Feb 8.
Raw material supply is essential for all industrial activities. The use of secondary raw material gains more importance since ore grade in primary production is decreasing. Meanwhile urban stock contains considerable amounts of various elements. Photovoltaic (PV) generating systems are part of the urban stock and recycling technologies for PV thin film modules with CdTe as semiconductor are needed because cadmium could cause hazardous environmental impact and tellurium is a scarce element where future supply might be constrained. The paper describes a sequence of mechanical processing techniques for end-of-life PV thin film modules consisting of sandblasting and flotation. Separation of the semiconductor material from the glass surface was possible, however, enrichment and yield of valuables in the flotation step were non-satisfying. Nevertheless, recovery of valuable metals from urban stock is a viable method for the extension of the availability of limited natural resources.
原材料供应对于所有工业活动都是必不可少的。由于初级生产中的矿石品位正在下降，因此二次原材料的使用变得更加重要。同时，城市库存中含有大量各种元素。光伏（PV）发电系统是城市库存的一部分，需要回收 CdTe 半导体薄膜模块的技术，因为镉可能会对环境造成有害影响，碲是一种稀缺元素，未来的供应可能会受到限制。本文描述了一种用于报废光伏薄膜模块的机械加工技术序列，包括喷砂和浮选。可以从玻璃表面分离半导体材料，但浮选步骤中有价物的富集和产率并不令人满意。然而，从城市库存中回收有价值的金属是延长有限自然资源可用性的可行方法。
