Journal of Advances in Science and Engineering 4 (2021) 36 – 43 Journal of Advances in Science and Engineering (JASE) J o u r n a l h o m e p a g e : www.sciengtexopen.org/index.php/jase Spheroidal graphite iron production of furnace roof hangers Cyril Ocheri a,  , Augustine D. Omah b , Christopher N. Mbah c , Romanus E. Njoku d , Nnaemeka A. Urama e , Chikezie W. Onyia f , Johnson Ezeanyanwu g , Sani M. Adam h a, b, d, e, h Department of Metallurgical and Materials Engineering, University of Nigeria, Nsukka, Nigeria c, f, g Department of Metallurgical and Materials Engineering, Enugu State University of Science and Technology, Enugu state, Nigeria 1. Introduction The wire rod mill of the Ajaokuta Steel Company Limited, which has the capacity to produce 138, 000 tons needs to continuously fabricate wire rods of sizes from 5.5 mm to 12.5 mm and re-bars of sizes 6.0 mm to 12 mm. Without the availability of the furnace hangers, it will definitely be difficult for the mill to continue to operate. The novelty and the specialty were to use the facilities in the foundry shop of the company to handle such project. The production of these furnace roof ———  Corresponding author E-mail address: cyril.ocheri@unn.edu.ng https://doi.org/10.37121/jase.v4i1.107 2636–607X /2736–0652 © 2021 the authors. Published by Sciengtex. This is an open access article under CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) hangers was handled by the foundry and pattern making shop of the company to produced damaged ones. The foundry shop has the capacity to produce ferrous and non- ferrous metals. In the premise of these challenges, the foundry shop produced furnace roof hangers using the spheroidal graphite iron (SGI) as the required materials needed for the furnaces. The foundry shop of the company has two electric arc furnaces, one ton induction furnace and other melting devices. It is suffix to state that both furnaces can be used to produce various type of cast ARTICLE INFO ABSTRACT Article history: Received 14 July 2020 Received in revised form 12 September 2020 Accepted 23 September 2020 Available online 24 September 2020 The wire rod mill of the Ajaokuta Steel Company Limited produces coils, wire rods and re-bars of different sizes. Without the furnace hangers, it will be difficult for the mill to continue to operate. This paper describes the production of furnace roof hangers that are required for re-heating furnace using the spheroidal graphite iron (SGI), highlighting the sand-casting process, charge calculation, and the chemical compositions. The facilities within the foundry shop of the steel company are used to produce furnace roof hangers. The available materials used for the casting of the hangers are the pig iron, scrap ends, foundry returns and magnesium. The process of production was performed through the reheating furnace for the heating of 120 m x 120 m x 120 m billets. One ton induction furnace of low frequency was used as the melting vessel. Also, 6 kg of magnesium was introduced in the ladle before the liquid metal was teemed into it. A Spectro analytical instrument was used to determine the chemical compositions of the materials before and after the casting processes. The analysis of the chemical compositions of produced sample of SGI are presented and discussed. Keywords: Furnace roof hangers Graphite Iron production Spheroidal graphite iron