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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad de Antioquia
2018
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| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=43060744006 https://www.redalyc.org/journal/430/43060744006/ https://www.redalyc.org/journal/430/43060744006/html/ https://www.redalyc.org/journal/430/43060744006/43060744006.epub https://www.redalyc.org/journal/430/43060744006/movil |
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- Thermodynamic and kinetic study of the recovery of tungsten and cobalt from tool waste Sebastián Sierra-Pérez Néstor Ricardo Rojas-Reyes José Martínez-Zambrano Hugo Alfonso Rojas-Sarmiento Ingeniería OPT RPT non Cobalt Tungsten In the present research work, the recovery of tungsten and cobalt from waste coming from tungsten carbide-cobalt (WC-Co) tools, which are widely used in the metalworking industry, was analyzed. The WC-Co waste was characterized by X-ray diffraction and scanning electron microscopy with microanalysis (SEM/EDS). The process started with the oxidation of the waste to obtain a mixture of oxides (WO3 and CoWO4). The ΔH and ΔG were calculated both for the oxidation and reduction processes. Thermodynamic and non-isothermal kinetic analyses were carried out to obtain a stability diagram where theoretical and experimental data are defined by transformation lines as a function of temperature; in addition, the apparent activation energy was determined. By a hydrogen reduction process, high-purity tungsten and cobalt in metallic form were obtained. 2018 artículo científico 0120-6230 https://www.redalyc.org/articulo.oa?id=43060744006 https://www.redalyc.org/journal/430/43060744006/ https://www.redalyc.org/journal/430/43060744006/html/ https://www.redalyc.org/journal/430/43060744006/43060744006.epub https://www.redalyc.org/journal/430/43060744006/movil 10.17533/udea.redin.n89a06 en http://www.redalyc.org/revista.oa?id=430 Revista Facultad de Ingeniería Universidad de Antioquia application/pdf Universidad de Antioquia Revista Facultad de Ingeniería Universidad de Antioquia (Colombia) Num.89