G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 27/409 (2006.01)
Patent
CA 2127666
ABSTRACT OF THE DISCLOSURE An oxygen and metal-in-slag sensor comprises a zirconia rod partially stabilised with either calcium oxide, magnesium oxide, or yttrium oxide, one end of which is exposed to the melt, typically in a lead blast furnace forehearth or a copper furnace discharge tundish, and the other end of which is exposed to an oxygen-containing gas, typically air. Thermocouples are provided to measure the rod temperature at least one point where it is in contact with the gas, and to measure separately the temperature in the melt adjacent to the probe. The cell is completed by a second electrode, which can be the casing in which the zirconia rod is mounted, and the thermocouple leads attached to the zirconia rod also function as part of the cell circuit. From a knowledge of the properties of the rod, the cell electrical behaviour can be used to obtain the melt oxygen potential, and the amount of metal oxide dissolved in the slag. The form of construction used is capable of surviving for an extended time period in a furnace environment.
Dubreuil Alain A.
Skeaff James M.
Dubreuil Alain A.
Shapiro Cohen
Skeaff James M.
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