1985 Volume 71 Issue 2 Pages 183-188
Oxygen sensors have been newly designed and tested for continuous measurements of oxygen potentials in pig iron and slag at blast furnaces in operation. The key points of constructions of the sensors are that 1) one-end closed tube of ZrO2. 9mol % MgO is used as a solid electrolyte, 2) graphite tube is used as a mount of the electrolyte and also 3) as an electrode in contact with pig iron, and 4) air-Pt electrode is used as a reference electrode. The sensors were tested in the runner at the skimmer of the blast furnaces. Oxygen potentials have been reliably measured for 157 min during 3 taps for pig iron and 78 min for slag in maximum.