Bhardowaz, Aarya and Das, Aditi and Sinhamahapatra, S. (2025) Recovery of Magnesia from Waste MgO-C Refractory Fines via Chemical Treatment. In: International Conference on Research Advancements and Industrial Challenges in Glass and Ceramics (RACGC 2025) , November 27-29, 2025, IIT Bombay, Mumbai. (Submitted)

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Abstract

Magnesite is a crutial raw material in the manufacture of refractory materials due to its high resistance to heat, chemical corrosion, and alkali effects. Despite having substantial magnesite reserves, India continues to rely heavily on imports of high-grade magnesia, primarily because a significant portion of its domestic supply is available in impure form. With rising demand in steel and allied industries and shrinking global availability, the recovery and reuse of magnesia from industrial waste offer a sustainable and economically valuable alternative. This study explores the recovery of magnesia from waste MgO-C refractory fines, which are typically discarded during recycling processes. While coarse refractory are often reused, the fine powder fraction despite its high magnesia content is commonly overlooked. Our research demonstrates that up to 86% of magnesia can be effectively recovered from these fines using chemical treatment ,evaluated through two distinct processing routes. Comprehensive characterization techniques, including X-ray fluorescence (XRF), X-ray diffraction (XRD), Thermogravimetric and Differential thermal analysis (TGA-DTA), and manual analysis, confirm that the recovered material contains more than 90% periclase (MgO) in both processing routes. Microstructural analysis reveals that Route 2 yields a finer grain size compared to Route 1, indicating potential advantages in specific application .our hope is to form spinel by using this highly pure recovered magnesia for high end application in refractory industry .This approach presents a practical and environmentally responsible solution to address raw material scarcity while enhancing the circular economy in refractory and metallurgical industries.

Item Type:	Conference or Workshop Item (Poster)
Subjects:	Refractories
Divisions:	Refractory
Depositing User:	Ms Upasana Sahu
Date Deposited:	12 May 2026 16:51
Last Modified:	12 May 2026 16:51
URI:	https://cgcri.csircentral.net/id/eprint/5790

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