Use of self-reducing pellets in the production of alloys ( high chromium iron - carbon )

• Autores: Pillihuaman Zambrano, Adolfo, Shishido Sánchez, Manuel
• Formato: artículo
• Fecha de Publicación: 2012
• Institución: Universidad Nacional Mayor de San Marcos
• Repositorio: Revista UNMSM - IIGEO
• Lenguaje: español
• OAI Identifier: oai:ojs.csi.unmsm:article/2284
• Enlace del recurso: https://revistasinvestigacion.unmsm.edu.pe/index.php/iigeo/article/view/2284
• Nivel de acceso: acceso abierto
• Materia: Chromite; autorreductor agglomerate; iron-chromium; Autoshrink; Cromita; aglomerado autorreductor; hierro-cromo; autorreducción

The self-reducing agglomerates were effective in reducing chromites for producing high carbon iron-chromium , improving the speed is reduced , or by increasing the efficiency of chrome recovery and electric power is economizing . The self-reducing pellets of Brazilian chromite containing petroleum coke and 2% Fe -75 % Si, bonded with Portland cement with and without addition of fluxantes (SiO2 and CaO) , were tested at 1773K until there was , evolution of gas reduction . The resulting product was analyzed by electron microscopy and the composition of the phases present by EDS . This work demonstrates that the addition of the composition fluxantes the self-reducing chromite pellets before being reduced causes formation of a slag phase , hindering reduction speed . The results showed that in the self-reducing agglomerates without adding fluxantes , the reduction rate was 2 times faster compared with fluxantes containing at 1773K . This confirms the importance of the mechanism of gas - solid reaction in the carbothermal reduction of the chromite .