RECOVERY AND REUSE OF WASTE CALCIUM/SODIUM SOAPS USED IN WIRE DRAWING PROCESSES
Abstract
In this study, the recovery of dry soap-based (calcium/sodium) lubricants used and discarded in wire drawing processes was investigated. The chemical structure of the waste soaps was analyzed using FT-IR, XRF, TG/DTA, and SEM techniques. While no significant chemical degradation was observed in the soaps after use, a considerable increase in metallic contaminants, particularly iron, was detected. Therefore, chemical cleaning with HCl at various concentrations was applied to remove iron from the waste soaps. The optimal recovery conditions were achieved with 0.5 M HCl treatment for 8 hours at 60 °C. Under these conditions, the chemical structure of the soap was preserved, the iron content was significantly reduced, and the morphology closely resembled that of the original soap. The findings demonstrate the reusability of the waste soaps and offer a sustainable recovery approach for industrial applications.
Keywords
Wire drawing, Lubricant, Soap, Recycling
Supporting Institution
Yildiz Technology Transfer Office
Project Number
YTUTTO1001
Ethical Statement
The authors stated that there are no conflicts of interest regarding the publication of this article.
Thanks
This study was supported by Özyaşar Wire and Galvanizing Industry Inc. within the scope of the project titled "Investigation of the Recovery Potential of By-products and Wastes Generated in the Wire Drawing Process and Galvanizing Line" and project no "YTUTTO1001".
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