Saving energy by optimized afterburning

Industrial process monitoring

Steel production is one of the most energy-intensive industrial processes. An electric smelting furnace requires some 450 kWh of electrical energy to smelt a tonne of metal. Optimized afterburning is able to reduce this energy demand by up to seven percent. This involves adding oxygen to the melt in order to convert the carbon monoxide generated into carbon dioxide by afterburning. The combustion heat is utilized for the smelting process. The better the concentrations of CO, CO2 and O2 are matched to one another, the more efficient the afterburning process will be. Fraunhofer IPM has developed a system that measures the concentrations of the gases in the arc furnace, thus making optimum process control possible. The system draws a sample of the gas mixture from the smelting furnace by suction. In less than ten seconds, an IR spectrometer determines the concentrations of CO, CO2 and O2. This enables the process parameters to be readjusted and the process to be optimized. The sensitive measurement technology functions reliably even under the difficult measuring conditions in the steelworks.

Publicly funded projects in the field of »Industrial Process Monitoring«

Project »Gas Efficiency«

High-speed measuring systems for the efficient use of regeneratively produced gases