Development of the Technology of Electric Arc Furnace Steelmaking May05

Development of the Technology of Electric Arc Furnace Steelmaking...

Development of the Technology of Electric Arc Furnace SteelmakingĀ  Development of the steelmaking technology takes place for meeting of a number of requirements. These requirements can be classified into four groups as given below. The technology has to meet the process requirements needed for producing different steel grades of required qualities. The technology is to meet the economic requirements needed for controlling the cost of production so that produced steel products are competitive. The technology is to meet the emission levels set by the regulatory agencies. The technology is to meet the health and safety requirements so that operators work in the area without any dangers, stress and stains. To understand electric arc furnace (EAF), it is necessary to understand what an electric arc is. An electric arc is a form of electrical discharge between two electrodes, separated by a small gap (typically, normal air). The best known example of this is lightning. Anyone who has performed arc welding is also familiar with electric arcs. If one connects the work piece to the negative side of a DC power source and an electrode to the positive side, touch the electrode momentarily and draw it a small distant apart from the work piece, then a stable electric arc forms between the electrodes and the work pieceĀ  and the heat from this arc is sufficient to melt the electrode and weld the work pieces together. The same idea is used in a larger scale in an electric arc furnace. The history of electric arc furnace (EAF) steelmaking is not very old. It is only slightly more than a century when the first furnace was commissioned to melt steel by utilizing electric power. The initial development of the technology took place, since these units made it possible...