Optimization of sponge iron (direct reduced iron) production with Box-Wilson experimental design by using iron pellets and lignite as reductant

İbrahim Sönmez; Kemal Şahbudak

doi:10.3989/revmetalm.241

Autores/as

İbrahim Sönmez Metallurgical and Materials Engineering Department, Hitit University https://orcid.org/0000-0001-8486-4663
Kemal Şahbudak Metallurgical and Materials Engineering Department, Sivas Cumhuriyet University https://orcid.org/0000-0003-4853-6843

DOI:

https://doi.org/10.3989/revmetalm.241

Palabras clave:

Diseño experimental Box-Wilson, Hierro esponja, Lignito, Optimización, Pellets de hierro

Resumen

Los minerales de hierro de Turquía pueden utilizarse para fabricar hierro esponja, y los recursos de carbón del país, abundantes a pesar de ser de mala calidad, pueden utilizarse como agente reductor. Con una producción de este tipo, el horno de arco eléctrico basado en la importación de chatarra, será una materia prima alternativa para la producción de acero, y esto creará un alto valor debido a la utilización de los recursos nacionales. En este estudio, se intentó optimizar la producción de hierro esponja utilizando fuentes locales. Para ello, se estudiaron los efectos del tiempo, la temperatura y la relación de peso [CFix/FeTotal] sobre el Grado de Reducción (%) de los parámetros importantes que son eficaces en la producción de hierro esponja mediante el uso de Pellets de Hierro Divriği y Lignito Dodurga como reductor, utilizando un diseño experimental Box-Wilson. Los parámetros óptimos determinados fueron: 82,59 min, 996,73 °C y 0,49, y el mayor valor de Grado de Reducción (%) se calculó como 96,46%. El hierro esponja obtenido con un Grado de Reducción del 71,91% contiene un 97,12% de Fe, del cual un 7,12% está oxidado. Es evidente que pueden alcanzarse contenidos de Fe más elevados con investigaciones realizadas con parámetros óptimos.

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