DEVICE FOR MEASURING THE OXYGEN CONTENT AND THE TEMPERATURE OF METAL MELTS DURING REFRESHING IN A CONVERTER.

摘要

1. Device for measuring the oxygen content and the temperature of molten baths, comprising a measuring head (3) consisting of an EMF cell (1) and a thermocouple (2) in which device the base of the measuring head (4) at the lower end of a supporting tube (5), preferably of paperboard, is partly inserted into the supporting tube and is held by the supporting tube, the supporting tube (5) is surrounded, essentially down to its lower end, by at least one sheath (9, 10) as protection against the metal bath, and to protect them before the device is immersed in the metal bath, the EMF cell (1) and the thermocouple (2) are surrounded, viewed from the inside to the outside, by a metal cap (12) and a protective hood (13) of a combustible material which are held by the part of the measuring head projecting over the supporting tube and the sheath, characterized in that the sheath (9, 10) consists exclusively of paper-board and the supporting tube (5) and the sheath (9, 10) are protected at their lower end by a shield (7a, 7b, 7c) which essentially covers only the underside of the sheath.