EP0116818A1 - Poröser Gasspüllanzenkopf - Google Patents
Poröser Gasspüllanzenkopf Download PDFInfo
- Publication number
- EP0116818A1 EP0116818A1 EP83870131A EP83870131A EP0116818A1 EP 0116818 A1 EP0116818 A1 EP 0116818A1 EP 83870131 A EP83870131 A EP 83870131A EP 83870131 A EP83870131 A EP 83870131A EP 0116818 A1 EP0116818 A1 EP 0116818A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- porous
- box
- refractory material
- fixed
- brick
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002347 injection Methods 0.000 title abstract 2
- 239000007924 injection Substances 0.000 title abstract 2
- 239000011449 brick Substances 0.000 claims abstract description 16
- 239000011819 refractory material Substances 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 9
- 239000011464 hollow brick Substances 0.000 claims abstract description 3
- 230000005587 bubbling Effects 0.000 claims description 13
- 238000007664 blowing Methods 0.000 claims description 10
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 6
- 238000004891 communication Methods 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 6
- 230000006378 damage Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
- B22D1/005—Injection assemblies therefor
Definitions
- the present invention relates to a porous box nose intended to be fixed to the end of a blowing lance, cooled or not, used for the bubbling or bubbling of a liquid metal contained in a ladle.
- the bubbling operation of a liquid metal is carried out using a porous brick or plug placed in the bottom of the bag, or even using a blowing lance with an axial hole.
- This procedure has many drawbacks, namely: very short period of use before destruction, hence frequent replacements requiring labor and significant handling.
- porous brick it is necessary to cool the bag to a temperature allowing the removal and replacement work to be carried out, then to heat the bag to its working temperature.
- the blowing causes an excessively strong vortex of the liquid metal, whence re-solution in the bath, slag and impurities floating on the surface.
- Another known device consists of a porous nose fixed to the end of a blowing lance and which has a larger porous surface and a better distribution of the stirring fluid.
- this porous nose is not very resistant to thermal shocks caused by the temperature variations which it undergoes during its removal. of the liquid bath between two successive operations.
- this device does not produce mixing of the entire volume of liquid metal because of the shape and dimensions of the nose.
- the invention aims to remedy the aforementioned drawbacks by a porous nose characterized by at least one box consisting of a hollow porous brick surrounded by an envelope of refractory material, the envelope being pierced with several openings and having a face crossed by a connecting tube to put in communication the interior cavity of the hollow brick and the tube of the lance at the end of which is fixed the nose.
- a block of refractory material in which is embedded a metal tube having a vertical branch and at least one horizontal branch, the end of the vertical branch being provided to be fixed to the end of a blowing lance and the ends of each horizontal branch being each provided for fixing the connection tube of a box.
- This drawing shows an exploded view of a porous nose 10 according to the invention with partial section.
- the porous nose comprises two boxes 1A, 1B fixed on the lateral faces of a cubic block 2
- Each box consists of a hollow porous brick 3 surrounded by an envelope 4 of refractory material.
- the brick 3 has a face which has a projection 5 in the form of a square-based pyramid trunk and on this projection 5 is mounted a metal box 6 whose height is greater to that of the projection 5 so as to create an interior chamber 7.
- One face of the casing 4 is crossed in its center by a metal connection tube 8 which opens into the interior chamber 7 opposite the interior rectangular cavity 9 of the porous brick 3.
- This connecting tube has its outer end provided to allow its attachment to a bubbling fluid supply arranged in this case in the cubic block 2 as will be seen below.
- the refractory casing 4 is pierced with a certain number of openings 11, for example four openings per outer face, ie a total of twenty openings. These openings are used for the passage of the bubbling or bubbling fluid introduced by the connection tube 8 into the interior cavity 9 of the brick 3 and then diffusing under pressure through the porous walls of the brick.
- the porous brick is produced in a mold, the internal dimensions of which determine the thickness of the refractory protective envelope.
- excess thicknesses of material are fixed on the porous block such that it will be destroyed during the drying of the box.
- the refractory concrete is then poured and then vibrated so as to obtain the desired degree of tightening. After demoulding and steaming, the assembly therefore has a concrete box provided with openings allowing the passage of bubbling or bubbling fluid passing through the porous brick.
- the envelope is advantageously reinforced by a grid serving as a reinforcement for refractory concrete.
- the cubic block 2 on which the boxes 1 are fixed consists of a refractory block 12 in which is embedded a metal tube 13 having a vertical branch and a branch horizontal.
- the end of the vertical branch is threaded to allow it to be fixed to the end of a blowing lance, known per se, and the ends of the horizontal branch are threaded to allow the boxes 1 to be fixed.
- Block 2 can also be provided with a metal tube, which would have several horizontal branches, for example two cross-shaped branches, the block then being able to carry four boxes 1 arranged in a cross.
- the bubbling or bubbling fluid coming from the lance is thus routed inside each of the boxes 1 to diffuse there through their respective porous bricks.
- a box 1 could be fixed directly on and in the axis of a blowing lance but although the mixing obtained in this case will be less good than when one fixes several boxes on a block as described previously, the porous nose with a single box will however have all the advantages of resistance of the nose according to the invention.
- the nose described above can advantageously be animated by a slow movement of rotation around the axis of the lance.
- This movement can be obtained either by mounting on the end of the lance a bevel-endless pinion system, coupled to a motor with reduction gear, or more simply by mounting porous boxes having a windowless side face, the movement of rotation being caused by the reaction of the thrust of the bubbling fluid on the liquid metal.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Nozzles (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT83870131T ATE29741T1 (de) | 1982-12-17 | 1983-12-14 | Poroeser gasspuellanzenkopf. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE0/209755A BE895386A (fr) | 1982-12-17 | 1982-12-17 | Nez caisson poreux pour lance de soufflage. |
| BE209755 | 1982-12-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0116818A1 true EP0116818A1 (de) | 1984-08-29 |
| EP0116818B1 EP0116818B1 (de) | 1987-09-16 |
Family
ID=3843586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83870131A Expired EP0116818B1 (de) | 1982-12-17 | 1983-12-14 | Poröser Gasspüllanzenkopf |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0116818B1 (de) |
| AT (1) | ATE29741T1 (de) |
| DE (1) | DE3373680D1 (de) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1961690B (de) * | Dresser Industrie Inc., Dallas, Tex. (V.St.A.) | Vorrichtung zur Spülgasbehandlung von Metallschmelzen | ||
| US3503597A (en) * | 1967-02-20 | 1970-03-31 | Kessler Harry Harvey | Metal treating device |
| GB1221816A (en) * | 1967-05-12 | 1971-02-10 | Reynolds Metals Co | A method of treating molten metal and a gas diffuser unit therefor |
| GB1374586A (en) * | 1971-10-08 | 1974-11-20 | British Aluminium Co Ltd | Apparatus for introducing gas into liquid metal |
| FR2340377A1 (fr) * | 1976-02-03 | 1977-09-02 | Kloeckner Werke Ag | Lance de soufflage pour la metallurgie |
| BE893651A (fr) * | 1982-06-25 | 1982-12-27 | Desaar Rene | Nez poreux pour le bullage d'acier |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU70375A1 (de) * | 1973-07-13 | 1974-10-17 |
-
1983
- 1983-12-14 AT AT83870131T patent/ATE29741T1/de not_active IP Right Cessation
- 1983-12-14 DE DE8383870131T patent/DE3373680D1/de not_active Expired
- 1983-12-14 EP EP83870131A patent/EP0116818B1/de not_active Expired
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1961690B (de) * | Dresser Industrie Inc., Dallas, Tex. (V.St.A.) | Vorrichtung zur Spülgasbehandlung von Metallschmelzen | ||
| US3503597A (en) * | 1967-02-20 | 1970-03-31 | Kessler Harry Harvey | Metal treating device |
| GB1221816A (en) * | 1967-05-12 | 1971-02-10 | Reynolds Metals Co | A method of treating molten metal and a gas diffuser unit therefor |
| GB1374586A (en) * | 1971-10-08 | 1974-11-20 | British Aluminium Co Ltd | Apparatus for introducing gas into liquid metal |
| FR2340377A1 (fr) * | 1976-02-03 | 1977-09-02 | Kloeckner Werke Ag | Lance de soufflage pour la metallurgie |
| BE893651A (fr) * | 1982-06-25 | 1982-12-27 | Desaar Rene | Nez poreux pour le bullage d'acier |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE29741T1 (de) | 1987-10-15 |
| DE3373680D1 (en) | 1987-10-22 |
| EP0116818B1 (de) | 1987-09-16 |
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|---|---|---|---|
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