American Iron and Steel Works

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 ...

Iron cycling at corroding carbon steel surfaces

Surfaces of carbon steel (CS) exposed to mixed cultures of iron-oxidizing bacteria (FeOB) and dissimilatory iron-reducing bacteria (FeRB) in seawater media under aerobic conditions were rougher than surfaces of CS exposed to pure cultures of either type of microorganism. The roughened surface, demonstrated by profilometry, is an indication of loss of metal from the surface. In the presence of C...

Center for Advanced Sustainable Iron & Steel Making

Current blast furnace technology is a two-stage ironmaking process that requires that iron ore concentrate first be formed into pellets, fired at 1260°C, cooled, transported to the blast furnace, and then re-heated to approximately 1500°C to produce pig iron. This heating, cooling, and then reheating wastes a great deal of energy, which would be saved if the ironmaking process had only a single...

Globalisation and China’s Iron and Steel Industry Modelling China’s Demand for Steel Importation

A Divide-conquer Heuristic Search Algorithm for Cutting Surplus Steel Plates of Steel and Iron Companies

The cutting pattern problem of the surplus steel plates (SPCP problem) is difficult to solve. In this paper, a divide-conquer heuristic search approach (DHSA) is proposed for SPCP. Firstly, the related knowledge is extracted and used in transforming the SPCP problem into the special restricted rectangle packing problem (S2RP problem) for each group of surplus(es) and orders. Afterward, feasible...