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가스취입에 의한 용융 동 합금 중 납의 증발속도

Evaporation Rate of Lead in Molten Copper Alloy by Gas Injection

  • 김항수 (국민대학교 신소재공학부) ;
  • 정성엽 (국민대학교 신소재공학부) ;
  • 정우광 (국민대학교 신소재공학부) ;
  • 윤의한 (대창공업주식회사 기술연구소) ;
  • 손호상 (경북대학교 금속공학과)
  • Kim, Hang-Su (Dept. of Advanced Materials Engineering, Kookmin University) ;
  • Jeong, Seong-Yeop (Dept. of Advanced Materials Engineering, Kookmin University) ;
  • Jeong, U-Gwang (Dept. of Advanced Materials Engineering, Kookmin University) ;
  • Yun, Ui-Han ;
  • Son, Ho-Sang (Departments of Metallurgical Engineering, Kyungpook National University)
  • 발행 : 2002.01.01

초록

The lead has to be removed for the recycling of copper alloy. The lead cannot be removed from the copper alloy by oxidation. It can be removed by the evaporation because of its high vapor pressure. However, rare information is found on removal of lead from copper alloy. The purpose of present work is to provide a fundamental knowledges on the removal of lead from the copper alloy by evaporation. Gas injection was made in molten copper alloy, and the evaporation rate of lead was measured. The influence of Ar gas flow rata(2~4 L/min), initial contents of lead(2~4wt%Pb), temperature(1200~140$0^{\circ}C$) was investigated based on the thermodynamic and the kinetics. The rate constant is increased with increasing flow rate of Ar and temperature. Though amount of lead removed is increased with higher initial lead concentration, the rate constant is not changed significantly. The activation energy is estimated from the temperature dependence of the rate constant. Also removal of lead from the copper by adding chloride was made for the comparison.

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