EP0070109A1 - Lances immergées - Google Patents
Lances immergées Download PDFInfo
- Publication number
- EP0070109A1 EP0070109A1 EP82303261A EP82303261A EP0070109A1 EP 0070109 A1 EP0070109 A1 EP 0070109A1 EP 82303261 A EP82303261 A EP 82303261A EP 82303261 A EP82303261 A EP 82303261A EP 0070109 A1 EP0070109 A1 EP 0070109A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- length
- injection lance
- refractory
- pipe
- refractory material
- 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.)
- Withdrawn
Links
- 238000002347 injection Methods 0.000 title claims description 15
- 239000007924 injection Substances 0.000 title claims description 15
- 239000002184 metal Substances 0.000 claims abstract description 23
- 239000011819 refractory material Substances 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 17
- 238000000576 coating method Methods 0.000 claims description 17
- 238000005253 cladding Methods 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 claims 1
- 230000002265 prevention Effects 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 239000002893 slag Substances 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000008646 thermal stress Effects 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
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
Definitions
- This invention relates to injection lances of the type used, e.g., in steel production.
- lances are produced from a metal pipe typically 3 to 6 metres in length protected by an outer refractory coating or cladding, located around the metal pipe. Because of the forces on the lance during use, such as can arise from the turbulence of the molten metal, vibration, thermal stress from rapid heating and cooling, and possibly differential thermal expansion, the coating is prone to shelling and splitting, and in addition there is heavy wear by chemical erosion particularly at the slag line.
- the object of the present invention is to provide an injection lance that avoids the above disadvantages.
- an injection lance comprises a metal pipe encased in an outer coating or cladding of refractory material, the metal pipe and the refractory coating or cladding being formed from a number of lengths of pipe on each of which is formed a coating or cladding, with the lengths of pipe being removably secured together.
- the forming technique can involve moulding, casting or pressing the refractory material around the pipe length.
- one end of each length of steel pipe to extend beyond its refractory coating or cladding with the other end lying within the refractory material, formed as a socket.
- adjacent lengths can be secured together by screwing the projecting end of the pipe of one length into the embedded socket in an adjacent length, whereby the refractory material of one piece may be brought into firm contact with the refractory material of the adjacent length.
- a thin coating of cement or jointing compound between adjacent lengths can be provided, and when present, a cement of a highly refractory nature can be used.
- additional reinforcement e.g., metal spiders
- the refractory batch can include fibres of a metallic nature.
- a lance may be formed from a number of lengths and can use different refractory materials at different sections each chosen to suit the particular conditions in that part of a vessel, e.g., ladle, occupied by the lance, and as a still further alternative, different lengths can have different thicknesses again so that each length can be ideally suited to the service conditions likely to be encountered.
- Lances of the invention can be preassembled and delivered to the user ready for use. However, transporting relatively long lances can result in damage. It is therefore a still further advantage of the invention that there can be the avoidance of the need to transport long lengths of lance, by transporting the individual lengths which can be assembled very quickly on site.
- a lance 1 is formed from a metal pipe encased in a refractory material, whereby the lance can be inserted into a bath of molten metal and a gas or a gas/powder mixture passed down the metal pipe and into the molten metal.
- both the metal pipe and the encasing refractory of the lance are formed as a number of relatively short lengths.
- an inlet section 2 having a metal pipe 3 externally threaded over part of its length and whereby the lance can be secured to handling mechanism for the lance.
- the pipe 3 has secured to it reinforcement 4 in the form of two inverted V-sections of mesh and is provided with an encasing refractory material 5, the refractory being co-planar with the end of the pipe 3.
- the pipe 3 has a screw threaded socket 6, into which is screwed the spigot 7 of a pipe 8 of a second section 9, which again has V-sectioned reinforcing mesh 10 and encasing refractory 11, the spigot 7 lying clear of the refractory, and the refractory lying co-planar with the opposite end of the pipe 8, where a, socket 12 is provided.
- the socket 12 of the final section receiving the spigot 13 of the pipe 14 of an end section 15, which also has V-shaped reinforcing mesh 16 and encasing refractory material 17, the outermost end of the pipe 14 having a screw- threaded socket 18, e.g., to receive a diffuser plug or the like.
- a proprietory compound to prevent accidental unscrewing can be applied to the threads of each spigot and socket, and to prevent molten metal penetration at the junction between each length of refractory, the abutting faces can be coated with an appropriate refractory jointing compound or cement.
- the refractory material can be an 80% alumina, high purity castable refractory material, and the cement a phosphate-bonded air-setting cement.
- the damaged length can be uncoupled from the adjacent lengths and replaced by a new length, thereby avoiding the need to throw away a complete lance - because it has been damaged at one point, as is the case with the lances of the prior art.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Charging Or Discharging (AREA)
- Ceramic Products (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8121113 | 1981-07-08 | ||
| GB8121113 | 1981-07-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0070109A1 true EP0070109A1 (fr) | 1983-01-19 |
Family
ID=10523106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82303261A Withdrawn EP0070109A1 (fr) | 1981-07-08 | 1982-06-22 | Lances immergées |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0070109A1 (fr) |
| JP (1) | JPS5825441A (fr) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2546181A1 (fr) * | 1983-05-20 | 1984-11-23 | Didier Werke Ag | Dispositif d'amenee de gaz dans un recipient metallurgique et procede pour l'actionnement d'un tel dispositif |
| WO2004113576A3 (fr) * | 2003-06-25 | 2005-04-21 | Rhi Ag | Systeme de tuyeres et cuve de coulee metallurgique associee |
| CN106191469A (zh) * | 2016-08-30 | 2016-12-07 | 中冶华天南京工程技术有限公司 | 一种氧化镁喷枪 |
| CN112608129A (zh) * | 2020-12-09 | 2021-04-06 | 钢城集团凉山瑞海实业有限公司 | 耐火材料及制备方法，轨枕耐高温防烧损装置及制备方法 |
| CN114737018A (zh) * | 2022-05-07 | 2022-07-12 | 湖南华菱涟源钢铁有限公司 | 一种铁水扒渣自耗式喷气枪及使用方法 |
| CN119351765A (zh) * | 2024-12-24 | 2025-01-24 | 湘潭和鑫盛新材料有限公司 | 一种插入式精炼金属用快换式吹气搅拌管及搅拌吹气系统 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62103313A (ja) * | 1985-10-30 | 1987-05-13 | Nippon Stainless Steel Co Ltd | 冶金処理炉用吹込管 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1014255A (en) * | 1965-02-15 | 1965-12-22 | British Oxygen Co Ltd | Improvements in or relating to lances for the treatment of molten metals |
| US3352552A (en) * | 1965-07-08 | 1967-11-14 | Harbison Walker Refractories | Refractory-coated oxygen lance |
| US3495815A (en) * | 1967-07-17 | 1970-02-17 | Union Carbide Corp | Outside change tuyere |
| BE879036A (fr) * | 1979-09-27 | 1980-01-16 | Desaar Rene | Virole pour lance de soufflage ou d'injection |
| WO1980001923A1 (fr) * | 1979-03-16 | 1980-09-18 | Hoeganaes Ab | Garniture refractaire pour tube metallique |
-
1982
- 1982-06-22 EP EP82303261A patent/EP0070109A1/fr not_active Withdrawn
- 1982-07-07 JP JP11706182A patent/JPS5825441A/ja active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1014255A (en) * | 1965-02-15 | 1965-12-22 | British Oxygen Co Ltd | Improvements in or relating to lances for the treatment of molten metals |
| US3352552A (en) * | 1965-07-08 | 1967-11-14 | Harbison Walker Refractories | Refractory-coated oxygen lance |
| US3495815A (en) * | 1967-07-17 | 1970-02-17 | Union Carbide Corp | Outside change tuyere |
| WO1980001923A1 (fr) * | 1979-03-16 | 1980-09-18 | Hoeganaes Ab | Garniture refractaire pour tube metallique |
| BE879036A (fr) * | 1979-09-27 | 1980-01-16 | Desaar Rene | Virole pour lance de soufflage ou d'injection |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2546181A1 (fr) * | 1983-05-20 | 1984-11-23 | Didier Werke Ag | Dispositif d'amenee de gaz dans un recipient metallurgique et procede pour l'actionnement d'un tel dispositif |
| WO2004113576A3 (fr) * | 2003-06-25 | 2005-04-21 | Rhi Ag | Systeme de tuyeres et cuve de coulee metallurgique associee |
| CN106191469A (zh) * | 2016-08-30 | 2016-12-07 | 中冶华天南京工程技术有限公司 | 一种氧化镁喷枪 |
| CN106191469B (zh) * | 2016-08-30 | 2018-01-23 | 中冶华天南京工程技术有限公司 | 一种氧化镁喷枪 |
| CN112608129A (zh) * | 2020-12-09 | 2021-04-06 | 钢城集团凉山瑞海实业有限公司 | 耐火材料及制备方法，轨枕耐高温防烧损装置及制备方法 |
| CN114737018A (zh) * | 2022-05-07 | 2022-07-12 | 湖南华菱涟源钢铁有限公司 | 一种铁水扒渣自耗式喷气枪及使用方法 |
| CN119351765A (zh) * | 2024-12-24 | 2025-01-24 | 湘潭和鑫盛新材料有限公司 | 一种插入式精炼金属用快换式吹气搅拌管及搅拌吹气系统 |
| CN119351765B (zh) * | 2024-12-24 | 2025-04-11 | 湘潭和鑫盛新材料有限公司 | 一种插入式精炼金属用快换式吹气搅拌管及搅拌吹气系统 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5825441A (ja) | 1983-02-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH DE FR IT LI LU NL SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19840102 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: CARTER, MICHAEL Inventor name: HEDLEY, TIMOTHY WILLIAM |