Assessing magnesia effect on preparing refractory materials from ferrochromium slag. Issue 9 (1st May 2022)

• Record Type: Journal Article
• Authors: Gu, Foquan; Zhang, Yuanbo; Tu, Yikang; Wu, Xintao; Zhu, Yunxian; Long, Yuyang; Shen, Dongsheng
• Is Part Of: Ceramics international. Volume 48:Issue 9(2022)
• Page Start: 13100
• Page End: 13107
• Publication Date: 2022-05-01
• Subjects: Ferrochromium slag -- Magnesia -- Sintering -- Refractory materials; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.01.186
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The feasibility of preparing refractory materials from ferrochromium slag was explored by assessing the influence of magnesia addition on the phase composition, microstructure and properties of refractory materials. The thermodynamic calculation results revealed that the presence of magnesia increased the amount of forsterite and spinel phases, and reduced liquid phase, which contributed significantly to improve the melting point of the ferrochromium slag system. The XRD and SEM-EDS analyses indicated that increasing the addition of magnesia was beneficial to the transformation and crystallization of the forsterite and spinel phases. In particular, as the magnesia addition changed from 0 wt % to 25 wt %, the growth of the spinel phase was significantly promoted, with the average spinel grain size increased rapidly from 2.42 μm to 11.36 μm. An excellent refractory material could be prepared by selecting an appropriate magnesia addition of 25 wt %.