N.T.S. is a subsidiary of Tata Steel (Thailand) Public Co. Ltd., and specializes in the production of steel rod and wire for the construction industry. The liquid steel is produced in an electric arc furnace, which has a tapping weight of 76 metric tons. The installation of the RCB system, the new electrode control and the Foaming Slag Manager from Primetals Technologies will reduce the consumption of electricity per metric ton of steel by 4 % and electrode consumption per metric ton of steel by 17 %.
At the same time, reduced tapping times will increase the productivity of the electric arc furnace by 5 %. Deployment of the Foaming Slag Manager allows for actively controlling the height of the foaming slag which, in turn, optimizes the input of electrical energy into the steel bath. In future, electrode control will be handled by the arc control optimizing system (Arcos) from Primetals Technologies. Using an industrial PC as a platform, Arcos has self-adapting algorithms, and makes melt profiles available automatically. This not only cuts energy consumption, but also makes the melting process more efficient. Process stability is also enhanced by continuously monitoring a range of parameters of the electricity supply system. Under the project, Primetals Technologies will also modify the hydraulic system of the electrode lifting columns by fitting new control valves to ensure optimum operation of the Arcos control system.
(Source: Primetals Technologies Ltd.)