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Ultrasonic nozzle for use in metallurgical installations and method for dimensioning an ultrasonic nozzle

A technology for supersonic nozzles and metallurgical equipment, applied in lighting and heating equipment, special data processing applications, computer-aided design, etc., can solve problems such as the need to replace gun heads, achieve good internal flow characteristics, simplify installation or operation, and save copper material effect

Active Publication Date: 2013-04-24
SMS DEMAG AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After this time, the nozzle edge wears down so much that there is a risk of water breakdown of the water-cooled supersonic nozzle and the nozzle tip has to be replaced

Method used

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  • Ultrasonic nozzle for use in metallurgical installations and method for dimensioning an ultrasonic nozzle
  • Ultrasonic nozzle for use in metallurgical installations and method for dimensioning an ultrasonic nozzle
  • Ultrasonic nozzle for use in metallurgical installations and method for dimensioning an ultrasonic nozzle

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Embodiment Construction

[0029] Different embodiments of the disclosure are described below, wherein the same reference symbols are used for identical or similar components and a repeated description is partially omitted.

[0030] Figure 1 shows the schematic Mach number distribution inside and outside of a Laval supersonic nozzle (which operates with oxygen). Oxygen enters the atmosphere here at 1650°C.

[0031] It is evident here that in the design state shown in Figure 1a, ie when the pressure p at the outlet cross-section e equal to the ambient pressure p u , allowing essentially undisturbed flow.

[0032] The underexpansion (Unterexpansion) is shown in Figure 1b, where the ambient pressure p u is less than the pressure p at the outlet cross-section e . Disturbing jet streams are clearly recognizable here.

[0033] In Fig. 1c is shown the overexpansion (Ueberexpansion), ie in which the ambient pressure p u greater than the outlet cross-section p e place pressure. There is also a disturbin...

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Abstract

The invention relates to an ultrasonic nozzle for use in metallurgical installations, in particular for the top blowing of oxygen in a Basic Oxygen Furnace (BOF) or an electric arc furnace (EAF), comprising a convergent portion and a divergent portion, which are adjacent to each other at a nozzle throat (DK), wherein the ultrasonic nozzle is defined by the following group of nozzle forms in the respective design case thereof: (T1)

Description

Technical field [0001] The present invention involves a method of UEBERSCHALLLLESE applications applied in metallurgical devices and a method to determine such supersonic nozzles. Background technique [0002] The supersonic nozzle or Laval supersonic nozzle finds a wide range of use in the field of metallurgy applications.For example, in the BOF turning furnace (oxygen bleeding furnace) when making steel, the Aufblasen is blown into a metal pool with the help of the Blaslanze. [0003] In the field of arc furnace (EAF), the supersonic nozzle is applied to a sprayer used in oxygen or in a burner for melting waste. [0004] For example, a supersonic nozzle that is known in the file WO 00 / 28096 A1 is known to spray the device of oxygen or other engineering gas. It can be applied to metallurgical process and especially when melting metal.Here is a mathematical method for designing the wall contours of the convergence of the LAVAL supersonic nozzle and the diffusion nozzle. Among the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/46F27B3/22F27D3/16
CPCF27D2003/164F27D2003/169F27D3/16C21C5/4606G06F17/5009F27B3/225C21C5/5217G06F30/17Y02P10/20C21C5/46F27B3/22G06F30/00G06F30/20G06F30/28G06F2113/08
Inventor H-J.奥登塔尔J.施吕特H.奥利维尔I.克利奥切尼科夫
Owner SMS DEMAG AG
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