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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium REWAS 2022: Recovering the Unrecoverable
Presentation Title Investigation of Hydrometallurgical Recycling Parameters of WC-Co Cutting Tool Scraps
Author(s) Hakan Kusdemir, Onuralp Yücel, Ahmet Turan, Kagan Benzesik
On-Site Speaker (Planned) Kagan Benzesik
Abstract Scope The aim of the study is the investigation of hydrometallurgical recycling of WC-Co cutting tool scraps in detail. Scraps contained 83.67 wt.% W, 5.56 wt.% C, 8.76 wt.% Co. The study consisted of two successive stages. The first stage was based on the selective leaching of cobalt and separation from tungsten carbide. The second stage was the precipitation of cobalt from pregnant solutions. Before experiments, scraps were grinded and screened to lower than 250 μm average particle size. In the first stage, WC-Co powders were leached in HNO 3 solution. In order to achieve maximum dissolution of cobalt, acid concentration, temperature, stirring rate and raw material particle size parameters were investigated. In the second stage of the study, precipitation parameters of Co (in the form of Co(OH) 2 ) by using NaOH solution were investigated. The raw materials and recycling products were characterized by using AAS, ICP-MS and XRD techniques.
Proceedings Inclusion? Planned:
Keywords Recycling and Secondary Recovery, Hydrometallurgy, Sustainability


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