Use of Oxygen Sensors in Steelmaking Companies during 1987 Year and Their New Uses

Abstract

The number of oxygen sensors consumed by Japanese steelmaking industries in 1987, the objects of use and the reliability of sensors were surveyed. 518 653 pieces of oxygen sensor were consumed in Japan and 157 700 pieces were exported to Taiwan, China and Korea. 26.3% of them consumed in Japan were used in converters, 9.9% in ladles, 53.9% in RH and DH, 5.6% in secondary refining, 3.2% in the tundishes of continuous casting and 1.0% in electric furnaces. Main objects of the uses were almost the same as the results of survey in 1985, that is, the determination of the amount of deoxidizers and the control of aluminium content in steel. Oxygen sensors were also used in converters for the estimation of contents of phosphur and manganese in steel at blow-end. Discussions on the reliability of oxygen sensors and the other technics for determining the contents of elements in steel were made.