The Steel Scrap Age

Steel Scrap Purchasing Optimization and Supply Management

A mixed integer non-linear optimization problem has been developed to aid in purchasing scrap steel. The model, which includes about 600 real-valued variables, 200 integers, and over 800 possible constraint equations, uses industrial data, actual market prices and supplier information to perform calculations. Prices, quality and supplier information are input or read into the model, along with ...

Scrap Iron and Steel Recycling in Nigeria

Nigeria is blessed with abundant iron ore deposits of nearly 3 billion tonnes and other basic minerals for steel production including coal and limestone. Yet the Nigerian steel sector has collapsed principally due to shortage of raw materials particularly iron ore for the integrated steel plants and billets for the rolling mills. The privatization of the steel sector that was done in 2004-2005 ...

Evaluation and improvement of the quality of Senegalese reinforcing steel bars produced from scrap metals

Fuzzy chance constrained linear programming model for optimizing the scrap charge in steel production

Optimizing the charge in secondary steel production is challenging because the chemical composition of the scrap is highly uncertain. The uncertainty can cause a considerable risk of the scrap mix failing to satisfy the composition requirements for the final product. In this paper, we represent the uncertainty based on fuzzy set theory and constrain the failure risk based on a possibility measu...

Life cycle assessment of steel production from iron scrap: a case study at a steel plant

Background and Objective: The steel industry is the world's largest consumer of energy. A large amount of iron waste is produced annually, which its use in the steel industry can be economic. The purpose of this study was to investigate the environmental impacts of the steelmaking from iron scrap as a raw material using a life cycle assessment (LCA) method. Materials and Methods: Simapro softw...