Title: Utilisation of white aluminium dross-based briquetted synthetic slag during secondary steelmaking process

Authors: SK Wasim Haidar; Albin Rozario Samiraj

Addresses: Research and Development Department, JSW Steel Limited Dolvi Works, Geetapuram, Dolvi, Taluka Pen, District Raigad, Maharashtra, 402107, India ' Research and Development Department, JSW Steel Limited Dolvi Works, Geetapuram, Dolvi, Taluka Pen, District Raigad, Maharashtra, 402107, India

Abstract: Aluminium dross, which is a waste product of aluminium manufacturing process, is toxic and hazardous in nature. Therefore, search for a suitable disposal method becomes crucial to process this dross effectively. Recycling is recognised as the best way out for sustainable development. Present study discussed the utilisation of white aluminium dross-based briquetted synthetic slag (WADBBSS) in place of pre-melted synthetic slag (PMSS) during secondary steelmaking. X-ray diffraction (XRD) analysis of WADBBSS shows around 9% of metallic aluminium. Viscosity analysis of WADBBSS and PMSS shows a difference of 0.04 Pa.s at steelmaking temperature. Industrial trials carried out with the addition of WADBBSS shows a reduction of 0.07-0.08 kg of aluminium consumption per tonne of liquid steel compared to heats processed with PMSS. There was no adverse effect observed in desulphurisation rate and nitrogen pick-up. Trial results established that WADBBSS can replace PMSS in terms of effectiveness.

Keywords: aluminium dross; synthetic slag; recycling; secondary steelmaking; FactSage; viscosity; liquidus temperature.

DOI: 10.1504/IJMATEI.2023.136115

International Journal of Materials Engineering Innovation, 2023 Vol.14 No.4, pp.315 - 330

Received: 10 Apr 2022
Accepted: 30 Jun 2022
Published online: 17 Jan 2024 *

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