Chloridizing Roasting of Spent NdFeB Magnet Using Ammonium Chloride

Randhawa, N S and Kumari, Aarti and Sahu, S K (2020) Chloridizing Roasting of Spent NdFeB Magnet Using Ammonium Chloride. In: 22nd DAE-BRNS Symposium on Thermal Analysis (Thermans 2020), 30 Jan-01 Feb 2020, BARC (Mumbai).

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The thermogravimetry is a useful tool to understand the roasting behavior of ores and minerals. Roasting of spent rare earth magnet (NdFeB) has evolved as attractive method for recycling of rare earth elements (REE) to conserve their scarce resources. We studied the chloridizing roasting of spent magnets of wind turbines with an objective to selectively convert the REE into water soluble chlorides. TG-DTA of NdFeB powder shows the commence of oxidation above 300°C. Further TG-DTA studies of NdFeB-NH4Cl mixture corroborated with thermodynamic calculations indicates 300°C as suitable temperature for chloridizing roasting process to obtain the NdCl3 and Fe2O3.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Thermaogravimetry, Thermal analysis, NdFeB, Recycling, Chloridizing roasting
Divisions:Metal Extraction and Forming
ID Code:8134
Deposited By:Dr. Navneet Singh Randhawa
Deposited On:08 May 2020 11:06
Last Modified:08 May 2020 11:06
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