Smelting Process of Chromite Ore Fines to Produce Crude Fe–Cr–Ni–N Alloy

Dishwar, RK and Agrawal, S and Mandal, AK and Sinha, OP (2020) Smelting Process of Chromite Ore Fines to Produce Crude Fe–Cr–Ni–N Alloy. In: Transactions of the Indian Institute of Metals, 73 (3). pp. 537-542.

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Abstract

The smelting behavior of waste chromite ore fines containing Cr and Ni to produce crude Fe–Cr–Ni–N alloy was investigated in this study. In the experiments, for each heat, liquid steel melt (metal pool 1 kg) was prepared in a 3--capacity laboratory-scale electric arc furnace for the absorption of reduced metals like chromium, nickel, etc., under hydrogen and nitrogen plasma atmosphere at ~ 1600 °C temperature. The result shows the formation of crude alloy containing ~ 13% Cr, ~ 3% Ni along with ~ 500 ppm nitrogen. The highest recovery level of chromium was achieved ~ 63% in 20-min nitrogen plasma exposure. A negligible amount of chromium recovery (14.73%) in case of only hydrogen plasma and improved recovery (60%) for a combination of carbon and hydrogen plasma was observed. Suitable nitrogen level in the Fe–Cr melt can replace the required nickel content for making austenitic stainless steel. Hence, smelting reduction of chromite ore fines in the plasma arc furnace could be feasible to produce crude Fe–Cr–Ni–N alloy. This alloy could be used for making austenitic stainless steel after adopting suitable decarburization techniques

Item Type:	Journal Article
Publication:	Transactions of the Indian Institute of Metals
Publisher:	Springer
Additional Information:	The copyright for this article belongs to the Springer.
Keywords:	Chromium recovery; Fe–Cr–Ni–N alloy; Hydrogen plasma; Nitrogen plasma; Plasma smelting; Stainless steel
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	02 Feb 2023 04:44
Last Modified:	02 Feb 2023 04:44
URI:	https://eprints.iisc.ac.in/id/eprint/79701

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