In this paper, tin-waste resources were pulverized and separated by cut-mill and multi cyclone separator, respectively. After the cut-mill process, more than 98% of the Pb-Sn and Sn-Ag-Cu scraps were recovered, and the by-products consisting of metal and oxide could be reused as solder. The separation of pulverized powders was performed using the minimum fluidization velocity depending on the density of the materials. When the flow rate was 21 L/min (70% blower output), it had the highest separation efficiency.

I. 서 론
 II. 실험방법
 III. 결과 및 고찰
  1. 원재료 분석
  2. 파·분쇄 공정
  3. 분급 공정
 IV. 결 론
 감사의 글
 References

• 박일정(고등기술연구원 신소재공정센터) | Il Jeong Park
• 김건홍(고등기술연구원 신소재공정센터) | Geon Hong Kim
• 정항철(고등기술연구원 신소재공정센터) | Hang Chul Jung Corresponding author