Tunable Diode Laser Measurements of CO, H2O, and Temperature Near

Laser-based in-situ measurements of furnace gases show promise for improving energy efficiency and pollutant emissions for steelmaking furnaces such as electric arc furnaces (EAFs). A near-infrared (IR) tunable diode laser (1.56 µm) has performed in-situ off-gas analysis of gas temperature and carbon monoxide and water concentrations in the exhaust gas region above a laboratory burner, with response times less than 1 second. These laboratory experiments related spectroscopic data to gas temperature and concentration data. The applicable range of conditions tested is representative of those found in a commercial EAF and includes temperatures from 1250 to 1650 K, CO concentration from 0 to