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http://dx.doi.org/10.7844/kirr.2021.30.1.60

Ultrasonic Immersion-steam Cleaning and High Temperature Drying Process for Removing Cutting Oil on Titanium Turning Scraps  

Chae, Jikwang (Division of Advanced Materials Engineering, College of Engineering, Jeonbuk National University)
Yoo, Suhwan (Division of Advanced Materials Engineering, College of Engineering, Jeonbuk National University)
Oh, Jung-Min (Division of Advanced Materials Engineering, College of Engineering, Jeonbuk National University)
Lim, Jae-Won (Division of Advanced Materials Engineering, College of Engineering, Jeonbuk National University)
Publication Information
Resources Recycling / v.30, no.1, 2021 , pp. 60-65 More about this Journal
Abstract
The recycling of titanium turning scraps requires the removal of cutting oil and other contaminants remaining on the surface. In this study, an experiment was conducted in which titanium scraps were cleaned by a combination of ultrasonic immersion-steam cleaning and subsequent drying at high temperature. To determine the removal mechanism of cutting oil, the contact angle between titanium surface and cutting oil was measured. The result confirmed the optimum condition of the immersion solution of the titanium turning scraps. In the case of immersion cleaning of Na4P2O7 aqueous solution, the degree of carbon removed in the cutting oil was the highest at 50℃, and it was confirmed that the carbon content obtained from the combination of steam cleaning and ultrasonic immersion-steam cleaning was lower than that from steam cleaning after ultrasonic immersion. The oxidation and decomposition behaviors of cutting oil were investigated using Thermogravimetric analysis (TGA) and the result was applied in the high temperature drying process. From the results of the high temperature drying tests, it was concluded that 200℃ is the optimal drying temperature.
Keywords
Titanium; Turning scraps; Steam cleaning; Carbon; Oxygen;
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Times Cited By KSCI : 1  (Citation Analysis)
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