Bhardowaz, Aarya and Das, Aditi and Sinhamahapatra, Somnath (2025) Separation of Magnesia from Waste MgO-C Refractory Fines Powder by Chemical Leaching Process. In: 29th International Conference on Non-Ferrous Metals-2025 (ICNFM-2025), 11-12 July 2025, Hotel Taj Bengal, Kolkata.

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Abstract

Magnesite is a crucial raw material used in the production of refractory materials, which are known for their resistance to high temperatures, corrosion, and alkalis. However, the global supply of high-quality magnesite is limited, and countries like India, which have significant reserves, still face a shortage due to the magnesite being in impure forms. As a result, India imports millions of tons of magnesite annually from other countries. In industries such as steel and iron production, where refractories are essential, the demand for high-grade magnesia is increasing, but the supply is shrinking. This research focuses on recovering magnesia from used refractory waste. In many research it has been observed that in recycling of waste refractory there is large agglomerates can be used upto 50% while, the fine powders were typically discarded. Our study reveals that up to 86% of magnesia can be recovered from these discarded fine powder through chemical leaching process by two different roots. After observing the result of XRD, TGA-DTA and by manual method the presence of periclase is about 90% in carbon magnesia fines powder which can recovered.in this study microstructure of this recovered Mg also observed The recovered magnesia has commercial applications, contributing to both environmental sustainability and the efficient use of resources. This approach offers a promising solution to the challenges of magnesite supply and waste management in the industry. This process not only helps reduce waste but also makes use of a material that is otherwise overlooked

Item Type:	Conference or Workshop Item (Poster)
Uncontrolled Keywords:	Magnesite, Refractories, Recovery, Chemical Leaching, Waste Management
Subjects:	Refractories
Divisions:	Refractory
Depositing User:	Ms Upasana Sahu
Date Deposited:	01 Sep 2025 10:33
Last Modified:	01 Sep 2025 10:33
URI:	http://cgcri.csircentral.net/id/eprint/5776

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