GB2059559A - A protective sleeve for a blowing or injection lance - Google Patents
A protective sleeve for a blowing or injection lance Download PDFInfo
- Publication number
- GB2059559A GB2059559A GB8030193A GB8030193A GB2059559A GB 2059559 A GB2059559 A GB 2059559A GB 8030193 A GB8030193 A GB 8030193A GB 8030193 A GB8030193 A GB 8030193A GB 2059559 A GB2059559 A GB 2059559A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ring
- protective sleeve
- reinforcing frame
- refractory material
- sleeve according
- 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
- 230000001681 protective effect Effects 0.000 title claims description 14
- 238000007664 blowing Methods 0.000 title claims description 8
- 238000002347 injection Methods 0.000 title description 4
- 239000007924 injection Substances 0.000 title description 4
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 20
- 239000011819 refractory material Substances 0.000 claims abstract description 16
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 229910052729 chemical element Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
- C21C5/4613—Refractory coated lances; Immersion lances
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
Abstract
The invention relates to a sleeve for protecting a lance, the sleeve comprising a moulded ring (2) of refractory material. The ring has at least one open-work reinforcing frame (10) formed from wire netting and embedded in the refractory material around its inner cylindrical surface (14). Helically wound spacing wires (12) hold the reinforcing frame at a distance from the inner surface of the mould during manufacture of the ring. <IMAGE>
Description
SPECIFICATION
A protective sleeve for a blowing or injection
lance
This invention relates to a sleeve for protecting
a blowing or injection lance which is used for
blowing at least one chemical element into a
metal bath. The lance may be, for example, a lance
for blowing oxygen into a bath of cast iron or a
lance for desulphurizing such a bath.
Such a protective sleeve substantially
comprises a ring of refractory material, the ring
being made in a vibrating mould having concentric
cylindrical walls.
In the case of known sleeves, the ring is simply
made of refractory material without any inner
reinforcement. Consequently the ring is not
resistant to mechanical stresses or impacts except
insofar as the refractory material is resistant when
compressed and thermally treated. Consequently
the ring has relatively poor mechanical resistance,
inter alia to impacts.
During handling in transport and when the
lances are mounted in position, the protective
rings frequently undergo impacts which break
them and make them unserviceable. Likewise
when the lances are used, the rings frequently
crack and break and have to be replaced before
reaching their full service life.
The present invention aims to provide an
improved protective sleeve which obviates the
aforementioned disadvantages of the prior art
sleeves.
Accordingly, the present invention provides a sleeve for protecting a lance for blowing or injecting at least one chemical element into a
metal bath, the sleeve comprising a ring of refractory material, in which protective sleeve the ring has at least one open-work reinforcing frame embedded in the refractory material around the inner surface of the ring.
Preferably, in a sleeve embodying the invention, the reinforcing frame is concentric with the inner and outer surfaces of the ring. Further, the reinforcing frame desirably extends to the endfaces of the ring.
In practice, the reinforcing frame of a sleeve embodying the invention may be made of wire netting. Preferably, the netting is made of steel wires which extend in relatively flat helices and are successively interlaced.
According to an important preferred feature of a sleeve according to the invention, the ring comprises a spacer means embedded in the refractory material between its inner surface and the reinforcing frame. The spacer means are used to hold the reinforcing frame at a substantially constant distance from the cylindrical inner surface of the mould, when the refractory material is inserted into and vibrated in the mould.
Preferably each spacer means is a ring of steel wire wound in a relatively flat helix.
In order that the invention may be readily understood, an embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIGURE 1 is an axial section through a protecting sleeve embodying the invention;
FIGURE 2 is an axial section through the
bottom part of a lance provided with sleeves embodying the invention; and
FIGURE 3 is a view, partly in perspective, of the frame reinforcing the protecting sleeve.
In the various drawings, like reference numerals denotes identical or similar elements.
The sleeve illustrated in Figure 1 is for protecting the metal tube 1 (Figure 2) of a blowing or injection lance used in steel-making, i.e. a lance for introducing at least one chemical element for refining, decarburizing or desulphurizing a bath of cast iron.
The sleeve in fact is in the form of a ring 2 bounded by two concentric cylindrical surfaces, i.e. an outer surface 3 and an inner surface 4, and by a top end-face 5 and a bottom end-face 6.
To facilitate axial alignment relative to adjacent upper and lower sleeves, each sleeve has a circular central rib 7 on its top surface 5 and a circular central groove 8 in its bottom surface 6.
Rib 7 and groove 8 have matching semi-circular cross-sections.
Ring 2 comprises a mass of known refractory material 9 and, in accordance with the invention, the refractory mass 9 is internally reinforced by at least one open-work frame 10. Reinforcing frame 10 is embedded in the refractory mass 7.
In the chosen example, the reinforcing frame 10 is concentric with the outer surface 3 and inner surface 4 of the ring 2 and extends vertically between the top surface 5 and the bottom surface 6 thereof.
Preferably the reinforcing frame 10 is made of wire netting consisting of steel wires 11 each wound in a relatively flat helix. Wires 11 are successively interlaced as shown in Figure 3.
Advantageously, ring 2 has spacer means 12, each preferably being formed from a steel wire -likewise extending in a relatively flat helix. The spacer means 12 are placed between (a) the inner cylindrical surface of the mould for manufacturing ring 2 and (b) the reinforcing frame 10, which is placed in the mould before the refractory material is inserted. Consequently, the spacer means 1 2 hold the reinforcing frame 10 at a substantially.
constant distance from the inner cylindrical surface of the aforementioned mould when the refractory material is introduced and vibrated.
After manufacture, accordingly, the reinforcing frame 10 is embedded in the refractory material 9 of ring 2 and is substantially concentric with the cylindrical surfaces 3 and 4.
When the lance is placed in position, the bottom sleeve rests around tube 1 on a refractory nose 13 with inter position of a bottom asbestos seal 14. In known manner, nose 1 3 is threaded and is screwed to a threaded refractory ring 1 5 surrounding tube 1. Ring 1 5 rests on a steel collar 16 secured to the bottom end of tube 1 in the hollow of nose 1 3. The intermediate sleeves successively rest on one another, each time with the interposition of an asbestos intermediate seal 17, and guide one another around tube 1 by means of their ribs 7 and grooves 8.
Claims (9)
1. A sleeve for protecting a lance for blowing or injecting at least one chemical element into a metal bath, the sleeve comprising a ring of refractory material, in which protective sleeve the ring has at least one open-work reinforcing frame embedded in the refractory material around the inner surface-of the ring.
2. A protective sleeve according to claim 1, in which the reinforcing frame is concentric with the inner and outer surfaces of the ring.
3. A protective sleeve according to claim 1 or 2, in which the reinforcing frame extends to the endfaces and of the ring.
4. A protective sleeve according to any one of claims 1 to 3, in which the reinforcing frame is constructed from wire netting.
5. A protective sleeve according to claim 4, in which the wire netting is made of steel wires extending in relatively flat helices and interlaced in succession.
6. A protective sleeve according to any one of claims 1 to 5, in which the ring has spacer means embedded in the refractory material between its inner surface and the reinforcing frame, the spacer means being used to hold the frame at a distance from the inner cylindrical surface of the mould when the ring is manufactured.
7. A protective sleeve according to claim 6, in which each spacer means is a ring formed by a steel wire extending in a relatively flat helix.
8. A protective sleeve substantially as described hereinbefore with reference to the accompanying drawings.
9. Any novel feature or combination of features herein disclosed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE197348A BE879036A (en) | 1979-09-27 | 1979-09-27 | SQUEEGEE FOR BLOWING OR INJECTION LANCE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2059559A true GB2059559A (en) | 1981-04-23 |
| GB2059559B GB2059559B (en) | 1983-03-23 |
Family
ID=3843254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8030193A Expired GB2059559B (en) | 1979-09-27 | 1980-09-18 | Protective sleeve for a blowing or injection lance |
Country Status (10)
| Country | Link |
|---|---|
| AT (1) | AT375677B (en) |
| BE (1) | BE879036A (en) |
| DE (1) | DE3035607A1 (en) |
| ES (1) | ES8105786A1 (en) |
| FR (1) | FR2466508B1 (en) |
| GB (1) | GB2059559B (en) |
| IT (1) | IT1133824B (en) |
| LU (1) | LU82794A1 (en) |
| NL (1) | NL8005302A (en) |
| SE (1) | SE451851B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2202317A (en) * | 1987-03-21 | 1988-09-21 | Stein Refractories | Lance for metallurgical use |
| US4783060A (en) * | 1986-08-20 | 1988-11-08 | Plibrico Company Gmbh | Immersion lance |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0062217B1 (en) * | 1981-04-02 | 1986-05-14 | Mono Construction Limited | Metallurgical lance |
| EP0070109A1 (en) * | 1981-07-08 | 1983-01-19 | Dyson Refractories Limited | Injection lances |
| BE893651A (en) * | 1982-06-25 | 1982-12-27 | Desaar Rene | POROUS NOSE FOR STEEL BALLING |
| DE3322556A1 (en) * | 1983-06-23 | 1985-01-10 | Didier-Werke Ag, 6200 Wiesbaden | Lance for blowing fluidised materials into molten metal |
| DE8622299U1 (en) * | 1986-08-20 | 1986-10-02 | Plibrico Co GmbH, 4000 Düsseldorf | Diving lance |
| US4792125A (en) * | 1987-08-24 | 1988-12-20 | Bethlehem Steel Corporation | Consumable lance |
| FR2676669A1 (en) * | 1991-05-24 | 1992-11-27 | Terres Refractaires Boulonnais | Injection lance for treating molten metals |
| DE29914990U1 (en) * | 1999-08-27 | 2001-01-18 | Plibrico Gmbh | Reinforcement for sheathing a metal pipe |
| DE102004054026B4 (en) * | 2004-11-05 | 2008-12-04 | Jankowski Gmbh & Co. Kg | Lance for introducing a particular gaseous medium into a liquid metal and method for the production |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE693927C (en) * | 1939-01-18 | 1940-07-22 | August Thyssen Huette Akt Ges | Injection pipe for introducing desulphurisation or cleaning agents into liquid iron |
| US2614585A (en) * | 1948-01-22 | 1952-10-21 | Hydrocarbon Research Inc | Composite pipe |
| US3778250A (en) * | 1969-02-26 | 1973-12-11 | Jones & Laughlin Steel Corp | Method for treating metallic melts |
| AU2082270A (en) * | 1970-10-07 | 1972-04-13 | Monzino Riotinto Of Australia Limited | Cooling of lances |
| DE2058967B2 (en) * | 1970-12-01 | 1975-08-21 | Sueddeutsche Kalkstickstoff-Werke Ag, 8223 Trostberg | Diving lance |
| DE2626982C3 (en) * | 1975-01-21 | 1985-04-04 | GR-Stein Refractories Ltd., Sheffield, Yorkshire | Lance for blowing fluidized substances into a molten metal and method for producing the lance |
| DE7613309U1 (en) * | 1976-04-28 | 1976-09-02 | Stahlwerke Peine-Salzgitter Ag, 3150 Peine | LANCE FOR INJECTING FLUIDIZED SUBSTANCES INTO A METAL MELT |
-
1979
- 1979-09-27 BE BE197348A patent/BE879036A/en unknown
-
1980
- 1980-09-18 GB GB8030193A patent/GB2059559B/en not_active Expired
- 1980-09-20 DE DE19803035607 patent/DE3035607A1/en not_active Withdrawn
- 1980-09-23 LU LU82794A patent/LU82794A1/en unknown
- 1980-09-23 NL NL8005302A patent/NL8005302A/en not_active Application Discontinuation
- 1980-09-24 FR FR8020500A patent/FR2466508B1/en not_active Expired
- 1980-09-26 AT AT0483780A patent/AT375677B/en active
- 1980-09-26 SE SE8006739A patent/SE451851B/en not_active IP Right Cessation
- 1980-09-26 ES ES495399A patent/ES8105786A1/en not_active Expired
- 1980-09-26 IT IT24953/80A patent/IT1133824B/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4783060A (en) * | 1986-08-20 | 1988-11-08 | Plibrico Company Gmbh | Immersion lance |
| GB2202317A (en) * | 1987-03-21 | 1988-09-21 | Stein Refractories | Lance for metallurgical use |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1133824B (en) | 1986-07-24 |
| SE8006739L (en) | 1981-03-28 |
| ATA483780A (en) | 1984-01-15 |
| AT375677B (en) | 1984-08-27 |
| BE879036A (en) | 1980-01-16 |
| DE3035607A1 (en) | 1981-04-16 |
| GB2059559B (en) | 1983-03-23 |
| FR2466508B1 (en) | 1985-10-18 |
| NL8005302A (en) | 1981-03-31 |
| IT8024953A0 (en) | 1980-09-26 |
| ES495399A0 (en) | 1981-06-16 |
| ES8105786A1 (en) | 1981-06-16 |
| LU82794A1 (en) | 1980-12-15 |
| FR2466508A1 (en) | 1981-04-10 |
| SE451851B (en) | 1987-11-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19920918 |