A Basic Study on the Recycling of Wasted Cemented Carbide by the Zn Bath Process(Ⅰ)

Abstract

In this study were carried out basic experiments mainly to investigate important reaction mechanism, the reaction temperature, time and the addition amount of Zn in recycling of waste cemented carbide by the zinc bath process. As a result, it was required that the Zn bath reaction was heated more than at 800°C to accelerate reaction of melted Zn and Co inside of wasted cemented carbide. Furthermore, thickness of the waste cemented carbide was reduced linearly according to increase of reaction time at 700°C for 0.5~2h in the zinc bath reaction. Also the zinc bath reaction was examined that heating in lower than at 800°C for 3h and then heated more than at 900°C for 1h(above 3.0x10 torr vaccum) was suitable to reduce vapour loss amount of Zn in the zinc bath process.