Transactions of the Indian Institute of Metals

, Volume 67, Issue 5, pp 617–622 | Cite as

Deoxidation of a Copper Melt by CO Gas Bubbling to Produce Oxygen Free Copper

Technical Paper
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Abstract

In this study, gas bubbling was used to deoxidise a copper melt. Prior to the deoxidation of copper, a water model was developed and evaluated to investigate the characteristics of bubbles produced by air injection with nozzles of different shapes and sizes. Bubble frequency, floating velocity and diameter were measured by a high speed video camera and were compared to theoretical results. Approximately 500 g of 99.9 % pure copper was melted in a graphite crucible by induction melting under an argon atmosphere. After samples were completely melted, CO gas was introduced from the nozzle into the copper melt to achieve deoxidisation. Oxygen concentrations in the melt were reduced to less than 6 ppm by CO gas bubbling. Electrical conductivities of the samples produced by CO bubbling were between 101.6 and 102.3 % IACS.

Keywords

Oxygen free copper Deoxidation Gas bubbling Bubble characteristics Electrical conductivity 
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Notes

Acknowledgments

This study was supported by a grant from the Fundamental R&D Program for Core Technology of Materials, funded by the Ministry of Knowledge Economy, Republic of Korea. The authors thank to Korea University of Technology and Education for the financial support, and also are grateful to Dr. I. Y. Hwang of Poongsan Corporation for constructive comments and suggestions.

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Copyright information

© Indian Institute of Metals 2014

Authors and Affiliations

  1. 1.School of Energy, Materials and Chemical EngineeringKorea University of Technology and EducationCheonanKorea

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