空气摇床分选废旧电路板

Separating discarded printed circuit boards by air table

分析了国内外废旧电路板处理技术与空气摇床分选机理，选择来自废旧电器的电路板与来自生产电路板产生的线路板物料进行实验，重点进行分粒级入选和混合粒级分选。实验结果表明，可回收70％的铜、铁和合金，金属的品位为53．48％，树脂与塑料的回收率可达78．57％，质量分数为85．51％；废旧电路板1．2—0．5mm粒级的物料分选效果较好，金属的质量分数为84．87％，回收率高达为94．64％。

Systemic studies of recycling discarded printed circuit board （PCB） by mechanical technology and separation mechanism of air table by density have been made, with chosen PCB from electronic waste and discarded printed wire boards. The results of the experiments show that air table can effectively separate electronic scrap in size of 2.8-0.25 mm of mixture material and different granularities. With more than 70 % of Cu, Fe and alloy recycled, the metal content of heavy product amounts to 59.48%. With 78.57 % recovery, the resin and plastic content in light product is 85.51%, It brings good results to separate 1.2-0.5 mm PCB, metal content is 84.87%, recovery is 94.64 %.