An optimization model for liquid steel production allocation at PT. XYZ considering maintenance schedule

• Main Authors: Hapsari, Shanella Nestri, Rosyidi, Cucuk Nur, Jauhari, Wakhid Ahmad
• Format: Conference Proceeding
• Language: English
• Subjects: Coils; Coils (strip); Cold rolling mills; Cold strip mills; Direct reduction plants; Electric arc furnaces; Electric wire; Hot rolling; Hot strip mills; Iron and steel industry; Iron and steel making; Iron and steel plants; Maintenance management; Optimization models; Raw materials; Rod mills (rolling); Rolling mills; Schedules; Steel industry; Steel making; Steel production; Steel products; Strip mills; Wire rod
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.5098214

PT. XYZ is one of the largest steel companies in Indonesia which has several production units and produces a wide range of steel products. The company has several production units, namely Direct Reduction Plant (DRP), Billet Steel Plant (BSP), Slab Steel Plant (SSP), Hot Strip Mill (HSM), Cold Rolling Mill (CRM), and Wire Rod Mill (WRM). HSM as one of the unit production under company produces hot rolled coil, and requires the supply of raw materials from another unit production (SSP). SSP has four Electric Arc Furnace (EAF), produces liquid steel as raw material of slab steel. In this research, we developed an optimization allocation model in EAF of SSP to maximize the profit considering maintenance schedule. The optimization model was solved by Optquest – Crystal Ball. The optimization results show that the model is able to find the optimal allocation of liquid steel production of each period considering EAF maintenance schedule. Based on the optimal result, the company can achieve a total profit of IDR 13,774,888,400.