Siemens Wins Order for New Off-Gas Monitoring System

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Siemens Industry, Inc., has received an order to provide an electric-arc-furnace (EAF) off-gas monitoring system at Steel Dynamics’ Roanoke Bar Division’s mini mill in Roanoke, Virginia. This order marks Siemens VAI’s expansion of its patented continuous off-gas sampling and analyzing system (LOMAS) into electric-arc-furnace process optimization through continuous off-gas monitoring. It is already a market leader for such technology in basic oxygen furnaces (BOF).

By continuously monitoring the EAF off-gas analysis and off-gas flow, and by utilizing the measured values with a SIMETAL holistic process model, this system provides instant feedback from the process and gives guidance for users to make adjustments as needed. Process inefficiencies can then be corrected by a closed-loop control for natural gas and oxygen injection through burners and lances. Consequently the technology results in reductions of overall energy, electrode, and jet-oxygen and burner-gas consumption, as well as augmented metallic yield and productivity. The LOMAS system also offers increased operational safety attributes due to its ability to quickly detect dangerous gas compositions during the melting and refining process. Greenhouse gas emission control is an added environmental benefit.

“The decision to install the LOMAS system was based on Siemens’ extensive experience and success with off-gas monitoring in BOF shops,” says Paul Schuler, manager or melt and cast at SDI Roanoke. “This experience and their desire to bring off-gas analysis to EAF shops gave us confidence that Siemens’ state of the art system would allow us to monitor and control in real time our process efficiencies, which we expect to reduce costs, increase productivity, and improve safety in the melting process.”

Siemens Industry, Inc. (SII) is the U.S. affiliate of Siemens’ global Industry Sector business—the world’s leading supplier of production, transportation, and building technology solutions. The company’s integrated hardware and software technologies enable comprehensive industry-specific solutions for industrial and infrastructure providers to increase their productivity, sustainability, and profitability. Go online to [www.usa.siemens.com/industrysolutions].