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

Patent metadata

Field	Value
Publication number	US-10126286-B2
Application number	US-201715613417-A
Country	US
Kind code	B2
Filing date	Jun 5, 2017
Priority date	Mar 25, 2013
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

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.

First claim

What is claimed is:

1. A method comprising:
(a) top-blowing a reaction gas using at least one lance onto a metallic melt in a metallurgical vessel and
(b) simultaneously recording measured data, and
(c) determining reaction data about reaction sequence as a function of the measured data so recorded,
wherein the at least one lance blows out a gas being conveyed separately from the reaction gas via at least one outlet opening of at least one measuring line,
wherein the at least one lance blows out the gas being conveyed separately from the reaction gas laterally via the at least one outlet opening of the at least one measuring line, and
wherein an internal pressure of at least one gas bubble formed at the at least one outlet opening of the respective at least one measuring line is measured to provide the measured data.

2. The method according to claim 1 , wherein the at least one lance blows the gas out laterally via at least first and second measuring lines into first and second sets of gas bubbles, wherein the reaction data about the reaction sequence are determined as a function of an establishment of the difference between measured internal pressures of the gas bubbles of the first set of gas bubbles and the second set of gas bubbles.

3. The method according to claim 2 , wherein the first and second measuring lines discharge the first and second set of gas bubbles at an identical lance height and wherein the gas bubbles of the first set of gas bubbles differ in size from the gas bubbles of the second set of gas bubbles.

4. The method according to claim 2 , wherein the first and second measuring lines discharge the first and second set of gas bubbles at different lance heights and wherein the gas bubbles of the first and second set of gas bubbles have equal size.

5. The method according to claim 2 , wherein the first and second measuring lines discharge the first and second set of gas bubbles at different lance heights and wherein the gas bubbles of the first set of gas bubbles have a different size from the gas bubbles of the second set of gas bubbles.

6. The method according to claim 2 , wherein the lance body has a first side and a second side opposite the first side and the first and second measuring lines blow out the gas on the first and second sides, respectively.

7. The method according to claim 1 , wherein the at least one measuring line is simultaneously cooled by a cooling medium that cools the lance.

8. The method according to claim 1 , further comprising controlling or adjusting the reaction sequence based on the reaction data determined.

Assignees

• Voestalpine Stahl Gmbh

Inventors

• Schuster Stefan
• Lengauer Gunter
• Panhofer Harald

Classifications

• C21C5/35

  Blowing from above and through the bath · CPC title

• F27D2003/168

  through a lance · CPC title

• C21C5/4606

  Lances or injectors · CPC title

• F27D19/00

  Arrangements of controlling devices · CPC title

• G01N33/205 Primary

  in liquid state, e.g. molten metals · CPC title