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Furukawa Review No.25

A Shaft Furnace Line for Producing Oxygen-Free Copper for Electron Devices Applications

Satoshi Teshigawara, Akiyuki Ohta, Kouichi Higashi, Hiromichi Konishi, Chizuna Kamata and Kensaku Oda


In recent years the level of environmental awareness has been rising world-wide, with increased emphasis being placed on measures to stop global warming and energy-saving initiatives, but these have been largely ineffective. In this work we present a shaft furnace as a replacement for induction furnaces in the melting of oxygen-free copper, and it has been possible, using this shaft furnace line, to produce oxygen-free copper that exceeds both the JIS standard for use in electron devices applications and the ASTM Grade1 standard. We also succeeded in achieving an energy saving of approximately 10 % in terms of primary crude oil equivalence units.

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