วันเสาร์ที่ 11 ตุลาคม พ.ศ. 2551

Letter of Intent


We are a consistant buyer of all electronic scrap. Specifically circuit boards of all types in large volume. We buy low grade, hi grade, telecom and pc boards. We buy these but the pound and by the piece when there are large runs of one type. We buy boards from cell phones as well as cell scrap.
Quantity: Upto 1000-2000 mt / Month
Shipment: CNF or CIF Bangkok, Thailand
Payment: L/C at sight

วันศุกร์ที่ 10 ตุลาคม พ.ศ. 2551

Crushing performance and resource characteristic of printed circuit board scrap


The crushing performance of printed circuit board (PCB) was studied on several crushers. The results show that PCB is a material which is difficult to crush. The crushing performance of PCB with disk crusher, especially vibration grinding, which has cut or impact action, excels that of jaw crusher or roller crusher.
The PCB scrap is worthwhile to recycle using variety of modern characterization methods. When compared with natural resources, this material stream remains a rich precious metal and nonferrous metals.

In PCB scrap, metals account for 47% of the total material composition, in which there exists 19.66% copper, 11.47% iron, 3.93% lead, 300 g/t gold and 5-10 kg/t silver, etc. In addition, the PCB scrap contains 27% of plastics and 26% of refractory oxides.