US 4,052,005 A · Oxygen lance nozzle

Abstract

An oxygen lance tip or nozzle for Basic Oxygen Furnace Operations includes a body having an oxygen discharge means. The tip or nozzle is connected to a central oxygen pipe and two outer concentric pipes provide water inlet and outlet passageways communicating with an outer annular water chamber in the tip or nozzle. The tip or nozzle which may be a forging, includes water cooling channels individually isolated with respect to the central walls of the lance tip or nozzle, each of the channels being arranged in essentially a U-shaped configuration to provide a directional change of water flow from the water inlet passageway to the internal cooling area. Walls of the channels formed with essentially flat surfaces which consists of inserts or baffles supported on an outer ring which regulates by-passing water and separates the water inlet and outlet passages.

Drawings

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Drawings

Claims27

Dependent claims

For a gas blowing lance having a central gas conduit, a first water coolant conduit concentrically positioned in laterally spaced relation with respect to said central conduit to provide a first cooling passage, and a second water coolant conduit concentrically positioned in laterally spaced relation relative to said second conduit to provide a second cooling passage, the improvement comprising;

a nozzle tip having a cylindrical body connected to said conduits and provided with a lower face,
gas passage means extending substantially vertically within said body communicating with said central gas conduit,
said gas passage means including opening means in said cylindrical face,
a circumferentially extending flange formed at the lower portion of said body extending vertically upwardly and spaced radially outwardly from said body to provide a cylindrical water chamber about the lower portion of said body,
said second conduit being connected to said flange to provide communication between said second cooling passage and said cylindrical water chamber,
a ring-shaped shelf supported on said cylindrical body and projecting radially outwardly with respect thereto,
said shelf being connected to said first conduit and having vertical passage means in communication with said first cooling passage and said water chamber,
water by-pass means in said body including inlet bore means communicating with said first water passage extending from the upper portion of said body diagonally inwardly and downwardly, and
outlet passage means in said body communicating with said inlet bore and extending radially outwardly and directly communicating with said cylindrical water chamber below said ringshaped shelf,
said outlet passage means including means for effecting nucleate boiling of the water to maximize heat transfer thereto.

7 more elements

For a gas blowing lance having a central gas conduit, first water conduit concentrically positioned in laterally spaced relation with respect to said central conduit to provide a first cooling passage, and a second water conduit concentrically positioned in laterally spaced relation relative to said second conduit to provide a second cooling passage, the improvement comprising;

a nozzle tip having a cylindrical body connected to said conduits and provided with a lower face,
gas passage means extending substantially vertically within said body communicating with said central gas conduit,
said gas passage means including opening means in said cylindrical face,
a circumferentially extending flange formed at the lower portion of said body extending vertically upwardly and spaced radially outwardly from said body to provide a cylindrical water chamber about the lower portion of said body,
said second conduit being connected to said flange to provide communication between said second cooling passage and said cylindrical water chamber,
a ring-shaped shelf supported on said cylindrical body and projecting radially outwardly with respect thereto,
said shelf being connected to said first conduit and having vertical passage means in communication with said first cooling passage and said water chamber,
water by-pass means in said body including inlet bore means communicating with said first water passage extending from the upper portion of said body diagonally inwardly and downwardly, and
outlet passage means in said body communicating with said inlet bore and extending radially outwardly and directly communicating with said cylindrical water chamber below said ring-shaped shelf,
said inlet bore and outlet passage means being positioned in relatively V-shaped configuration providing an abrupt change of liquid flow at the apex of said V-configuration,
said outlet passage means including two passages extending radially in diverging relation,
said outlet passages having substantially flat lower walls,
said bore means and two passages being formed by a bore cavity having an upper arcuate wall portion,
and insert means secured within said cavity spaced vertically from said arcuate wall portion to provide a lower wall for said bore means, and said insert means having lower portions vertically spaced from said lower walls of said passages to provide the top walls of said passages.

11 more elements

For a gas blowing lance having a central gas conduit, a first water conduit concentrically positioned in laterally spaced relation with respect to said central conduit to provide a first cooling passage, and a second water conduit concentrically positioned in laterally spaced relation relative to said second conduit to provide a second coolng passage, the improvement comprising;

a nozzle tip connected to said conduits and having a cylindrical body,
generally axial oxygen passage means communicating with said gas conduit and having discharge openings in said face,
a circumferentially extending flange formed on the lower portion of said body extending inwardly from the adjacent end and spaced radially outwardly from said body to provide a cylindrical water chamber about the adjacent portion of said body,
said second conduit being connected to said flange to provide communication between said second cooling passage and said cylindrical water chamber,
a ring-shaped shelf supported on said cylindrical body and projecting radially outwardly with respect thereto,
said shelf being connected to said first conduit and having first passages in communication with said first cooling passage and having second passages connected to said water chamber,
said first passages extending axially and inwardly into the body,
the lower ends of said first passages being spaced and isolated from one another by a common central wall portion of said body,
outlet bore means connected to the lower portions of said first passages and extending laterally outwardly and providing an abrupt change of direction from the first passages for liquid passing therethrough,
said outlet bore means communicating with said water chamber and means comprising said second passages for directing water into said water chamber for creating turbulance.

7 more elements

For a gas blowing lance having a central gas conduit, a first water conduit concentrically positioned in laterally spaced relation with respect to said central conduit to provide a first cooling passage, and a second water conduit concentrically positioned in laterally spaced relation relative to said second conduit to provide a second cooling passage, the improvement comprisng;

a nozzle tip connected to said conduit and having a cylindrical body,
a plurality of generally vertical oxygen passages communicating with said gas conduit and having discharge openings in said face,
a circumferentially extending flange formed on the lower portion of said body extending vertically upwardly and spaced radially outwardly from said body to provide a cylindrical water chamber about the lower portion of said body,
said second conduit being connected to said flange to provide communication between said second cooling passage and said cylindrical water chamber,
a ring-shaped shelf supported on said cylindrical body and projecting radially outwardly with respect thereto,
said shelf being connected to said first conduit and having a vertical passages in communication with said first cooling passage and said water chamber,
a plurality of water by-pass passages circumferentially spaced in said body, each including in a downwardly and inwardly extending first bore,
the lower ends of said bores being spaced and isolated from one another by a central wall portion of said body,
said by-pass passages further including outlet bore means connected to the lower portions of said bores and extending laterally outwardly and providing an abrupt change of direction for liquid passing therethrough,
said bore means communicating with said water chamber,
said first bores each having an upper arcuate wall and a lower wall,
and said outlet bore means each including a lower bore having an upper wall and a lower wall,
said lower wall of said first bores and said upper wall of said lower bores being formed by baffles supported within said body between said bores.

10 more elements

Dependencies are inferred from the claim text.

Description2,351 words

Summary495 words

#1. Field of the Invention

#The invention relates to a lance having an improved tip or nozzle utilized in the art of steel making, other refining processes, oxygen injection, and particularly to the method known as the basic oxygen furnace operation. The present invention relates particularly to a forged and machined copper nozzle, but may also apply to a cast tip of similar configuration.

#2. Description of the Prior Art

Brief description of the drawings11 figures

#FIG. 1 is a cross-sectional view through a basic oxygen vessel having an oxygen lance including a nozzle or tip projecting therein;

#FIG. 2 is an enlarged bottom view taken substantially along the line 2--2 of FIG. 1;

#FIG. 3 is a cross-sectional view through a lower portion of the lance taken substantially along the line 3--3 of FIG. 1;

Detailed description1,638 words

#Referring to FIG. 1 a basic oxygen furnace 10 comprises a vessel 11 which includes a downwardly projecting oxygen lance 12 having a lower oxygen tip or nozzle 13. The furnace 10 is used in the well-known and conventional basic oxygen process for refining steel. The nozzle 13 comprises a lower cylindrical face 14 having a plurality of oxygen ports 15 which provide outlets for diverging and converging oxygen passages 16.

#Referring particularly to FIGS. 3-7, the body 17 of the nozzle 13 is of a cylindrical and frusto-conical design. The lance 12 includes a central conduit 18 which is connected to the body 17, the said conduit 18 including an oxygen passage 19 which communicates with the oxygen passages 16 for directing oxygen to the bath provided in the vessel 11. As shown in FIG. 5 a first inner concentric conduit 20 provides a water or coolant inlet passage 21 and a second outermost coolant conduit 22 provides a water outlet passage 23.

#The lower end of the body 17 is provided with a laterally spaced circumferential flange 24 forming at the lower end thereof a water chamber 25. The circumferential flange 24 is welded to the second outermost conduit 22 in the assembly of the lance and nozzle. A ring providing a water separator or shelf 26, when assembled with the body 17, provides large by-pass passages 27 and small by-pass passages 28 which provide for direct communication between the water inlet passage 21 and the water chamber 25. As best shown in FIGS. 3 and 6, the passages 27 and 28 are circumferentially spaced around the body 17. As best shown in FIGS. 5, 6, 7 and 8, the body 17 is provided with a plurality of downwardly and inwardly extending diagonal inlet bores 29 spaced between each of the oxygen passages 16. Each diagonal inlet bore 29 includes an upper arcuate wall 30 and is provided at its lowermost end with a terminal lower portion 31 with each of the lower portions 31 being separated by a central wall portion 35 as best shown in FIG. 5.

Oxygen lance nozzle

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Oxygen lance nozzle

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims27

Description2,351 words

Drawings

Classification2 codes

Life of this patent

Description2,351 words