The steel industry is under continued pressure to enhance efficiency to satisfy financial and sustainability goals. In stainless steel production, higher alloying costs and more complex process control requirements create additional challenges. At Walsin Lihwa’s Yenshui plant, two persistent issues - non-uniform bath temperature distribution and bottom skull formation - were limiting melting...
Over the past years Linde has been supporting decarbonization at its steel industry customers by developing and implementing new technologies focused on energy-efficiency and use of hydrogen. The paper discusses these successful activities, taken place in close and direct cooperation with steelmaking companies, and show examples of the excellent results obtained.
Energy-efficient use of...
Electrical steelmaking is at the forefront of sustainable innovation, delivering major gains in energy and resource efficiency. Yet, even today, up to 30% of the energy input in EAF steel production escapes through off-gas emissions—representing lost value and increased environmental impact. Tenova’s iRecovery® system transforms this challenge into an opportunity. By capturing the thermal...
Monitoring off gas of an EAF allows to predict the decarburization process and hence the melt performance of the tap during the melting process. Using the off-gas data events such as scrap cave-ins, overdrafting and varying scrap moisture can be visualized in real time and hence predictions can be made about necessary changes in O2 lancing, electrode power as well as carbon injection. The...
Minimum conversion cost of alloyed steel production in the electric arc furnace require optimum mixing of the molten metal during melting and refining. Improved heat transfer accelerates the melting of larger scrap pieces for time and energy savings. Homogeneous distribution of alloy elements and carbon in the melt decreases the unwanted oxidation of alloys, e.g. Chromium for better metal...
Enhancing thermal efficiency and reducing operating costs are critical objectives in seamless pipe production, particularly in processes where billet preheating constitutes a major portion of total energy demand. In rotary hearth furnaces operating at billet temperatures near 1280 °C, a significant fraction of the fuel input is released as high-enthalpy flue gases, representing a valuable but...