The printed wiring boards (PWBs) in obsolete computers as a type of e-waste are also a resourceful metalmine hidden in cities. Along with the intensified shrinkage of mineral resources, recovery of metals from e_x0002_waste such as obsolete PWBs becomes an inevitable trend and also a requirement for adaptation to circulareconomy. In this study, copper was recovered from PWBs in obsolete computers via the process of “crushscreen-shake”. Copper was fully separated from other components at the crushing and grinding speeds of3100 r/m. Then after screening, the materials with a grain-size level of 0.12-0.3 mm contained the highestcopper content and were also separated well. After shaking-table separation, the copper grade was up to78.64%.
展开▼
机译：过时的计算机中的印刷线路板（PWB）作为一种电子垃圾，也是隐藏在城市中的一种资源丰富的金属矿。随着矿产资源的日益萎缩，从e_x0002_废料中回收金属，例如过时的PWB，已成为必然趋势，也是适应循环经济的要求。在这项研究中，通过“粉碎屏幕摇动”过程从过时的计算机中的PWB中回收了铜。铜以3100 r / m的粉碎速度与其他组分完全分离。然后在筛选之后，粒度水平为0.12-0.3 mm的材料包含最高的铜含量，并且也被很好地分离。振动台分离后，铜品位高达78.64％。
展开▼
