Lance and method for determining reaction data of the course of a reaction

Abstract

A lance and a method determine reaction data of the course of a reaction, in which a reaction gas is top-blown by at least one lance onto a metallic melt in a metallurgical vessel and measured data are determined in this way, reaction data for the course of the reaction are determined as a function of these, where the lance for determining measured data blows out a gas which is conveyed separately from the reaction gas through at least one outlet opening of at least one measuring conduit. The lance for determining measured data blows out the gas which is conveyed separately from the reaction gas laterally through at least one outlet opening of at least one measuring conduit and the internal pressure of at least one gas bubble of this gas formed at this outlet opening of the respective measuring conduit is measured.

1 . Method for the determination of reaction data of a reaction sequence, in which a reaction gas ( 4 ) is top-blown by means of at least one lance ( 1 ) onto a metallic melt ( 3 ) in a metallurgical vessel ( 2 ) and simultaneously measured data are recorded, as a function of which reaction data about the reaction sequence are determined, wherein the lance ( 1 ) for the recording of measured data blows out a gas being conveyed separately from the reaction gas ( 4 ) via at least one outlet opening ( 12 ,  13 ) of at least one measuring line ( 9 ,  10 ), wherein the lance ( 1 ) for the recording of measured data blows out the gas being conveyed separately from the reaction gas ( 4 ) laterally via at least one outlet opening ( 12 ,  13 ) of at least one measuring line ( 9 ,  10 ), wherein the internal pressure of at least one gas bubble ( 14 ,  15 ,  19 ) formed at this outlet opening ( 12 ,  13 ) of the respective measuring line ( 9 ,  10 ) is measured. 
     
     
         2 . Method according to  claim 1 , wherein the lance ( 1 ) blows gas out laterally via at least two measuring lines ( 9 ,  10 ), wherein reaction data about the reaction sequence are determined as a function of an establishment of the difference between the measured internal pressures of the gas bubbles ( 14 ,  15 ,  19 ). 
     
     
         3 . Method according to  claim 2 , wherein measuring lines ( 9 ,  10 ) discharging at the same lance height form gas bubbles ( 14 ,  19 ) differing in size from one another. 
     
     
         4 . Method according to  claim 2 , wherein measuring lines ( 9 ,  10 ) discharging at different lance heights form equally large gas bubbles ( 14 ,  15 ). 
     
     
         5 . Method according to  claim 2 , wherein measuring lines ( 9 ,  10 ) discharging at different lance heights form gas bubbles ( 14 ,  15 ,  19 ) of different size. 
     
     
         6 . Method according to  claim 2 , wherein the measuring lines ( 9 ,  10 ) blow out gas on opposite sides ( 21 ,  22 ) on the lance body ( 11 ), especially diametrically oppositely on the lance body ( 11 ). 
     
     
         7 . Method according to  claim 1 , wherein measuring line or the measuring lines ( 9 ,  10 ) is or are simultaneously cooled by the cooling medium that cools the lance. 
     
     
         8 . Top-blowing process, in which its reaction sequence is controllable or adjustable on the basis of reaction that are determined by means of a method according to  claim 1 . 
     
     
         9 . Lance for top-blowing a reaction gas ( 4 ) onto a metallic melt ( 3 ) disposed in a metallurgical vessel ( 2 ), with a lance body ( 11 ), which has an at least partly cooled lance jacket ( 5 ), with a gas supply ( 7 ) for the reaction gas ( 4 ) discharging in at least one opening ( 8 ) of the lance jacket ( 5 ), and with at least one measuring line ( 9 ,  10 ), which is provided in the lance body ( 11 ) and which ends in at least one outlet opening ( 12 ,  13 ) on the lance jacket ( 5 ) of the lance body ( 11 ) and blows out a gas being conveyed separately from the reaction gas ( 4 ), wherein the measuring line ( 9 ,  10 ) ends in at least one outlet opening ( 12 ,  13 ) laterally at the lance jacket ( 5 ) of the lance body ( 11 ) and is formed for the generation of at least one gas bubble ( 14 ,  15 ,  19 ). 
     
     
         10 . Lance according to  claim 9 , wherein a measuring device ( 20 ) is provided that contains, for the recording of measured data, a sensor ( 17 ,  18 ), which is in communication with the measuring line ( 9 ) for the recording of measured data dependent on the internal pressure of the gas bubble ( 14 ,  15 ,  19 ). 
     
     
         11 . Lance according to  claim 9 , wherein the lance body ( 11 ) contains at least two measuring lines ( 9 ,  10 ), which discharge laterally on the lance body ( 11 ). 
     
     
         12 . Lance according to  claim 11 , wherein the outlet openings ( 12 ,  13 ) of the measuring lines ( 9 ,  10 ) have different outlet cross sections. 
     
     
         13 . Lance according to  claim 11 , wherein the outlet openings ( 12 ,  13 ) of the measuring lines ( 9 ,  10 ) discharge laterally at different heights on the lance jacket ( 5 ). 
     
     
         14 . Lance according to  claim 11 , wherein the outlet openings ( 12 ,  13 ) of the measuring lines ( 9 ,  10 ) discharge on opposite sides ( 21 ,  22 ) on the lance body ( 11 ), especially diametrically oppositely on the lance body ( 11 ). 
     
     
         15 . Lance according to  claim 9 , wherein the measuring line ( 9 ,  10 ) is in thermally conducting communication, at least zonally, with the cooled lance jacket ( 5 ) of the lance body ( 11 ).