High voltage fragmentation of composites from secondary raw materials - Potential and limitations

被引：39
|
作者：
Leissner, T. [1 ]
Hamann, D. [2 ]
Wuschke, L. [1 ,2 ]
Jaeckel, H. -G. [2 ]
Peuker, U. A.
机构：
[1] TU Bergakad Freiberg, Inst Mech Proc Engn & Mineral Proc, Agr Str 1, D-09599 Freiberg, Germany
[2] TU Bergakad Freiberg, Inst Mech Engn, Leipziger Str 32, D-09599 Freiberg, Germany
来源：
WASTE MANAGEMENT | 2018年 / 74卷
关键词：
Recycling; Comminution; High voltage fragmentation; Specific energy consumption; Economic efficiency; ELECTRICAL PULSES; SIZE-REDUCTION; LIBERATION; WASTE; COMMINUTION; TECHNOLOGY; MINERALS; METALS; ORES;
D O I：
10.1016/j.wasman.2017.12.031
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The comminution of composites for liberation of valuable components is a costly and energy-intensive process within the recycling of spent products. It therefore is continuously studied and optimized. In addition to conventional mechanical comminution innovative new principles for size reduction have been developed. One is the use of high voltage (HV) pulses, which is known to be a technology selectively liberating along phase boundaries. This technology offers the advantage of targeted liberation, preventing overgrinding of the material and thus improving the overall processing as well as product quality. In this study, the high voltage fragmentation of three different non-brittle composites (galvanized plastics, carbon fibre composites, electrode foils from Li-ion batteries) was investigated. The influence of pulse rate, number of pulses and filling level on the liberation and efficiency of comminution is discussed. Using the guideline VDI 2225 HV, fragmentation is compared to conventional mechanical comminution with respect to numerous criteria such as cost, throughput, energy consumption, availability and scalability. It was found that at current state of development, HV fragmentation cannot compete with mechanical comminution beyond laboratory scale. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：123 / 134
页数：12
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