Luxmet develops control systems for the steel and metal industries. The company is the Universities of Oulu (UniOulu) spinoff. Solutions enable the making of real-time measurements from high-temperature metallurgical processes. The company was founded in 2014 based on the cross-disciplinary electric arc furnace research conducted by Process Metallurgy Research Unit. Luxmet Oy develops a control system based on the analysis of light to enable more accurate process practices in metallurgical industry. The company has two products, namely, ArcSpec and TempSpec.

ArcSpec measures, shows and analyzes the melting progression of the EAF hotspots and enables the optimal control of electrode power levels. Since melting does not happen at the same speed in every hot spot of the EAF, it’s important to control the electrodes individually. In addition to the faster melting process, ArcSpec also enables e.g. accurate timing of the second and possible third scrap basket as well. That also reduces the overall process time. In stainless steel production, the furnace refractory is exposed to a great amount of heat generated by the arcs. That results in wasted energy and additional wearing of the refractories. Since ArcSpec enables the control of the electrode voltages in real time and speeds up the process, it minimizes the time the refractories are exposed to the excessive heat. That leads to improved durability of the refractories.

ArcSpec’s real-time operation and EAF control ensure the accurate timing of the oxygen and carbon injection in the foaming process. Optimizing the process reduces energy consumption. Typical energy savings are between 5 to 10%. Continuous slag temperature measurements lead to optimal tapping temperature. ArcSpec can be combined with TempSpec to gain even more control over the melting and tapping process. TempSpec is a real-time on-line temperature measurement system for challenging high-temperature metallurgical processes. The system has been developed to withstand e.g. slag splashes. TempSpec is easy to install and maintain and it’s also suitable for highly dusty and otherwise harsh environments.

The system’s modular structure enables it to be adapted and optimized for different measurement needs and locations. The temperature measured by TempSpec can be displayed in a variety of dedicated displays or integrated into an existing display according to customer needs. Additional process data or spectrum diagnostics can be used to compensate for the impact of process conditions. The TempSpec system can also be connected to digital or analog industrial network systems for on-line control, for example, Profibus, Modbus or 4-20 mA connection.  ArcSpec and TempSpec are based on Luxmet’s advanced optical light emission gathering technology and have been developed in close co-operation with our key industry partners.