G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 27/411 (2006.01) G01N 27/409 (2006.01) G01N 33/20 (2006.01)
Patent
CA 2042601
- 21 - ABSTRACT A method and apparatus for measuring the oxygen activi- ty of the slag in molten iron or molten steel with high accuracy. A conventional measuring method in which an oxygen concentration cell produced by winding a platinum contact electrode around the outer surface of a solid electrolyte of one end closed tube type is disposed directly in the molten slag involves a fear of producing an error in measurement due to the difficulty in positioning in the fluid slag and the defective contact with the contact electrode caused by the densification by the heat of the slag. In the present invention, the oxygen activity in the slag is not directly measured but a specific metal between which and the slag an oxygen equilibrium is established when it comes into contact with the slag is charged in a container together with the slag. The oxygen activity of the specific metal is measured so as to indirectly measure the oxygen activity in the slag. The problems caused by the defective contact between the solid electrolyte and the contact electrolyte are thus solved, thereby enabling measurement of the oxygen activity in the slag with high accuracy.
Fujiwara Ryuji
Iwase Masanori
Mochizuki Ryo
Borden Ladner Gervais Llp
Yamari Electronite Kabushikigaisha
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