Siemens has received an EUR 10 million order from Slovakia Steel Mills to supply a water treatment plant for its new steelworks. The plant will treat the water used for direct and indirect cooling and is scheduled to come on stream by the end of 2010.
The mini mill of Slovakia Steel Mills in Strazske is designed to produce around 600,000tns of structural steel per year. It incorporates the complete process chain consisting of an electric arc furnace, ladle metallurgy facility, a three strand continuous casting plant and a rolling mill.
Steel production requires large quantities of treated water for direct and indirect cooling, so the central Siemens treatment plant has to supply some 7000cum of treated water every hour. The technical equipment includes cooling towers, pumping stations, pressure sand filters, metering stations and sludge treatment facilities.
The entire water treatment plant is automated by Simatic type S7 300 programmable logic controllers. Visualization is provided by a WinCC HMI system. Siemens is also supplying the process instrumentation equipment for monitoring the water quality.
This includes instruments to measure flow rates, pressures, temperatures and levels. All the pump drives are equipped with frequency converters, enabling the pumps to be run according to demand and thus saving energy.