Steelmaking lance with integral temperature probe
OwnerBernd Feldhausinventor
Life of this patent
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Abstract
This invention concerns a blowing lance and a procedure for the metallurgical treatment of molten steel in a converter with oxygen top blown over the molten steel. In order to monitor the treatment process the intention is for a temperature probe (21) to be integrated into the water-cooled lance head (2) behind the front end (11a) of the lance head and between the cooling chambers (5-10) formed in the lance head (2). The signal lines (26) of the temperature probe run through the lance body (1), more specifically, in a central protective pipe which has no fluid communication with the cooling medium or to the oxygen conducted by the lance.
Claims13
An oxygen blowing lance comprising:
- a lance body including an oxygen conduit and cooling water inlet and outlet conduits surrounding said oxygen conduit;
- a lance head connected to said lance body and comprising a nozzle body, said nozzle body including a central strut having bore hole, a plurality of nozzles arranged about said central strut, and a plurality of cooling chambers arranged about said central strut, wherein said plurality of nozzles are in fluid communication with said oxygen conduit for discharging oxygen from said oxygen conduit onto a metal bath in a converter vessel, and wherein said plurality of cooling chambers are in fluid communication with said cooling water inlet and outlet conduits;
- a temperature probe received in said bore hole for monitoring the temperature of said lance head;
- and
- signal lines connected to said temperature probe for conveying signals from said temperature probe whereby operation of said blowing lance is regulated in response to said signals.
Dependencies are inferred from the claim text.