EP0008314A1 - Cooled components for furnaces. - Google Patents
Cooled components for furnaces.Info
- Publication number
- EP0008314A1 EP0008314A1 EP19780900318 EP78900318A EP0008314A1 EP 0008314 A1 EP0008314 A1 EP 0008314A1 EP 19780900318 EP19780900318 EP 19780900318 EP 78900318 A EP78900318 A EP 78900318A EP 0008314 A1 EP0008314 A1 EP 0008314A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- copper
- nose
- metal
- particles
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
Definitions
- This invention relates to cooled components used in furnaces, particularly blast furnaces.
- coolers such as stack and bosh coolers, which are built into the refractory lining of the furnace, and tuyeres. These components are normally castings of copper or copper alloy.
- the object of the present invention is to improve the resistance to abrasion during use of cooled components for furnaces.
- a refractory or a metal with greater abrasion resistance than the metal used for the main body of the component.
- the added material may be a refractory or a metal in the form of one or more segments, a mesh or in discrete particles and is located at or just below the surface at the nose of the component.
- the materials which may be used include
- hard metal which comprises hard sintered carbides, such as tungsten carbide
- the materials concerned are introduced into the casting by locating them in position in the mould before casting is commenced.
- a particularly suitable element is expanded metal from stainless steel or heat resistant steel.
- An expanded metal element has a certain amount of depth as well as length and breadth and the spaces between the steel strips can be varied to give the desired gap, filled with the cast copper or other material, thus providing the desired good heat conduction from the exterior of the element to the cooling medium.
- Fig. 1 is part of an expanded steel element which can be used for the purposes of the invention
- Fig. 2 is a side view of a blast furnace cooler according to the invention
- Fig. 3 is a section on a larger scale taken on the line III-III of Fig. 2
- Fig. 4 is a similar part section showing a different type of abrasion resistant material
- Fig. 5 is a section through a tuyere according to the invention. BEST MODE OF CARRYING OUT THE INVENTION
- Fig. 1 of the drawings shows part of an expanded stainless steel element, generally designated by the reference numeral 10. This has been made in the usual way by cutting and expanding a sheet of stainless steel to give a lattice of strips 12 adjoined by flat nodes 14 which, as they are twisted out of the plane of the paper as seen in Fig. 1, give some depth to the structure as well as length and breadth. Spaces 16 between the strips 12 and nodes 14 will be filled by the cast metal in the finished article and will allow good conduction of heat to the surface of the cast component.
- the expanded sheet 10 can be cut to size and bent round very easily to form a curved or cylindrical shape.
- Suitable gauge for the stainless steel sheet from which the element 10 is made is 20 gauge (0.91 mm), and the stainless steel may be, for example, according to BS1449 EN58B.
- Figs. 2 and 3 show, on a smaller scale than that used in Fig. 1, a cooler, such as a bosh cooler, for a blast furnace.
- the cooler shown has a main cooling compartment 18 with inlet and outlet apertures 20 and 22, the nose end 24 of the cooler being cooled by means of a cast-in water pipe 26 having separate inlet and outlet 28 and 30.
- the characterising feature of the cooler is the expanded stainless steel element 10 which is included in the casting by locating it in position in the casting mould and casting the copper of the cooler round it. As shown in Fig. 2 it extends at length across the whole width of the nose of the cooler just underneath the surface and has been bent to go round the cast-in pipe 26 as shown in Fig. 3.
- Fig. 4 can be seen the nose of a cooler in which, instead of using an expanded steel element 10, the abrasion resistant material consists of particles 48 of hard metal, i.e. mainly sintered tungsten carbide, such as is used for carbide tips of cutting tools. No particular size or shape is needed for this particulate material and the particles may in fact be waste hard metal from the manufacture of carbide tips or used tips.
- the material 48 is embodied in the cooling element by placing it at the bottom of the mould or attached to the surface of the mould when the cooler is cast, so that the elements are embodied in the cast copper.
- Fig. 5 shows a tuyere of the sort having a main cooling chamber 30 surrounding an air-passage 32.
- the cooling chamber 30 has inlet and outlet apertures 46.
- the nose 34 of the tuyere is cooled by a separate cooling pipe 36 having an inlet pipe 38 leading thereto and a similar outlet pipe not seen in the section of Fig. 5.
- the nose is reinforced with two rings of expanded metal, an inner ring 40 which is inside the nose cooling pipe 36 and an outer ring 42 which surrounds the said pipe. Additionally hard metal particles 44 are embedded in the copper of the tuyere forwardly of the cooling pipe 36.
- any constructional form of cooler or tuyere can be used, the essential feature according to the invention being the provision of the abrasion resistant material at the nose of the device.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Blast Furnaces (AREA)
Abstract
Afin d'ameliorer la resistance contre l'abrasion pendant l'utilisation des composants refroidis dans les hauts fourneaux, tels que des tuyeres et des refroidisseurs de cheminees et d'etalages, un materiau refractaire ou un metal dont la resistance a l'abrasion est superieure a celle du metal normalement utilise - cuivre ou alliage de cuivre - employe pour le corps principal du composant, est introduit au moment de la coulee dans les parois des composants. Le materiau inclus peut avoir la forme d'un ou plusieurs segments, d'une maille ou de particules et peut etre situe a la surface ou immediatement sous celle-ci pres du nez (24) du composant. Les materiaux qui peuvent etre utilises sont des particules (44, 48) des "metaux durs" qui comprennent des carbures frittes durs, tels que des carbures de tungstene; des mailles et des elements expanses en acier inox (10, 40, 42) de differentes epaisseurs et de divers materiaux refractaires comprimes, capables de resister au choc thermique dans une matrice en cuivre.In order to improve the abrasion resistance during the use of cooled components in blast furnaces, such as pipes and coolers for fireplaces and displays, a refractory material or a metal whose abrasion resistance is greater than that of the metal normally used - copper or copper alloy - used for the main body of the component, is introduced at the time of casting in the walls of the components. The included material may be in the form of one or more segments, a mesh or particles and may be located on or immediately below the surface near the nose (24) of the component. The materials which can be used are particles (44, 48) of "hard metals" which include hard sintered carbides, such as tungsten carbides; stainless steel mesh and expanded elements (10, 40, 42) of different thicknesses and various compressed refractory materials capable of withstanding thermal shock in a copper matrix.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5381777 | 1977-12-23 | ||
GB5381777 | 1977-12-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0008314A1 true EP0008314A1 (en) | 1980-03-05 |
EP0008314B1 EP0008314B1 (en) | 1982-05-12 |
Family
ID=10469077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19780900318 Expired EP0008314B1 (en) | 1977-12-23 | 1979-07-16 | Cooled components for furnaces |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0008314B1 (en) |
JP (1) | JPS54500047A (en) |
DE (1) | DE2861834D1 (en) |
WO (1) | WO1979000431A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2903104C2 (en) * | 1979-01-27 | 1982-10-07 | Estel Hoesch Werke Ag, 4600 Dortmund | Cooling element for a metallurgical furnace, in particular a blast furnace, and method for its manufacture |
WO1990011377A1 (en) * | 1989-03-28 | 1990-10-04 | Peel Jones Copper Products Limited | Consumable furnace components |
EP1443119A1 (en) * | 2003-01-29 | 2004-08-04 | VAI Industries (UK) Ltd. | Cooling stave for shaft furnaces |
JP6646160B2 (en) * | 2016-02-18 | 2020-02-14 | ハッチ リミテッド | Abrasion-resistant composite material, its application to a cooling element of a metallurgical furnace, and its manufacturing method |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE148071C (en) * | ||||
US1673053A (en) * | 1926-02-24 | 1928-06-12 | Ohba Shintaro | Tuyere for blast furnaces |
DE2601727A1 (en) * | 1976-01-19 | 1977-07-21 | Guenter Bender | Protective coating for blast furnace tuyeres - obtd. by deposition welding of refractory metal carbide onto end of tuyere |
-
1978
- 1978-12-20 DE DE7878900318T patent/DE2861834D1/en not_active Expired
- 1978-12-20 JP JP50014278A patent/JPS54500047A/ja active Pending
- 1978-12-20 WO PCT/GB1978/000055 patent/WO1979000431A1/en unknown
-
1979
- 1979-07-16 EP EP19780900318 patent/EP0008314B1/en not_active Expired
Non-Patent Citations (1)
Title |
---|
See references of WO7900431A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1979000431A1 (en) | 1979-07-12 |
DE2861834D1 (en) | 1982-07-01 |
JPS54500047A (en) | 1979-11-01 |
EP0008314B1 (en) | 1982-05-12 |
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Legal Events
Date | Code | Title | Description |
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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 |
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AK | Designated contracting states |
Designated state(s): DE FR GB LU SE |
|
17P | Request for examination filed |
Effective date: 19791204 |
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GRAA | (expected) grant |
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AK | Designated contracting states |
Designated state(s): DE FR GB LU |
|
REF | Corresponds to: |
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