EP2276863A1 - Feuerfester keramischer gasspülstein - Google Patents
Feuerfester keramischer gasspülsteinInfo
- Publication number
- EP2276863A1 EP2276863A1 EP09768860A EP09768860A EP2276863A1 EP 2276863 A1 EP2276863 A1 EP 2276863A1 EP 09768860 A EP09768860 A EP 09768860A EP 09768860 A EP09768860 A EP 09768860A EP 2276863 A1 EP2276863 A1 EP 2276863A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- porosity
- section
- purging plug
- channel
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 10
- 238000004140 cleaning Methods 0.000 title abstract description 5
- 239000004575 stone Substances 0.000 title abstract description 5
- 238000010926 purge Methods 0.000 claims description 63
- 238000009826 distribution Methods 0.000 claims description 27
- 239000011214 refractory ceramic Substances 0.000 claims description 3
- 230000009970 fire resistant effect Effects 0.000 claims 1
- 239000002184 metal Substances 0.000 description 17
- 230000008595 infiltration Effects 0.000 description 7
- 238000001764 infiltration Methods 0.000 description 7
- 229910010293 ceramic material Inorganic materials 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
-
- 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
- C21C5/48—Bottoms or tuyéres of converters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
- F27D2003/161—Introducing a fluid jet or current into the charge through a porous element
Definitions
- the invention relates to a refractory ceramic gas purging plug.
- a gas purging plug is usually installed in the wall or in the bottom of a metallurgical treatment vessel and is often used in a so-called perforated stone (English: well nozzle).
- the gas purging plug is used to introduce gas into a molten metal.
- Directed porosity is when the gas flow along defined, discrete channels or slots is guided with a targeted flow direction.
- the gas channels usually run in a largely dense ceramic matrix material.
- the gas channels may have any cross-section perpendicular to the channel axis, for example round, oval, rectangular or triangular.
- the width of a channel, perpendicular to the channel axis, is usually ⁇ 2 mm, but may also lie above it in a gas purging element according to the invention, in particular if the gas channel at the gas outlet end opens into a section with undirected porosity.
- the gas channels are easily flushed out. Due to the high gas pressure, the gas can be transported deep into the molten metal. In this case, targeted flow profiles can be formed in the molten metal.
- the gas purging plug is subdivided into several sections, wherein, for example, a section with directional porosity and a section with undirected porosity can be formed.
- the sections can be separately or in any combination separately or simultaneously applied with gas.
- the gas purging device according to EP 1 513 633 Bl corresponds functionally to the DE 37 16 388 C l.
- the invention is therefore based on the object to offer a gas purging plug, which avoids these disadvantages. For example, should the Gas réellestein be less at risk for infiltration of the molten metal.
- the basic idea of the invention is to provide a refractory ceramic gas purging plug analogously to the subject matter of DE 199 54 918 A1, DE 37 16 388 C1 and EP 1 513 633 B1
- At least one connecting channel which connects at least one gas channel of the section with directed porosity with the portion of undirected porosity fluidly.
- the gas supply can be as follows:
- the portion of undirected porosity is gas-fed separately from the directed porosity portion.
- an additional indirect gas supply takes place in the Adsorption with uncommon porosity from the separation with directed porosity via the connection channels.
- the undirected porosity portion and the directed porosity portion may be supplied with gas via a common gas source, for example when both are connected to a common gas distribution chamber. Also in this case, however, the undirected porosity-prone portion of the molten metal infiltration receives an additional gas supply via the gas channels of the directed porosity portion and the one or more connection channels.
- the gas pressure in the section with undirected porosity can be increased in total (over the entire circumferential area) or specifically at certain sections.
- connection channel or channels can be formed at different locations (in the axial direction of the gas purging plug, at arbitrary locations in the cross section of the gas purging plug).
- portions of undirected porosity are concentric with portions of directed porosity possible to arrange a plurality of connection channels rotationally symmetrical, even at different heights (viewed in the direction of the gas flow).
- the following embodiments show possible construction forms.
- the strained porosity portion may include one or more gas channels, as discussed.
- this gas channel in a section perpendicular to the central longitudinal axis of the gas purging plug, for example, a ring or star shape (while the gas channel, viewed in the flow direction of the gas, has substantially the outer shape of a cylinder or truncated cone).
- This is then referred to as a joint washer, in which case solid bridges are present in the joint, which connect the refractory material on both sides of the joint in sections.
- the width of the joint is usually ⁇ 2mm or ⁇ 1mm.
- one or more communication channels may extend to the portion of undirected porosity, irregular or regular (symmetrical) with respect to the undirected porosity portion or the directed porosity portion, respectively.
- the directional porosity can also be formed by a reticulated pore channel system. If several network structures in the direction of directed pores in the section with directed porosity provided, they can be continued via associated connection channels to the section with undirected porosity.
- the connection channels can also have a network structure. This applies to single or multiple gas channels and / or connection channels.
- the directed porosity portion has a plurality of spaced apart gas passages, a plurality of communication passages are provided regularly, each of which fluidly connects a gas passage to the non-strained porosity portion.
- a connection point of the connection channel to a gas channel is farther away from the gas outlet side end face of the gas purging plug as a connection point of the connection channel to the portion of undirected porosity. This has the purpose of ensuring a steady gas flow (gas direction) within the gas purging plug in the direction of the gas outlet end, and thus a constant and targeted gas flow.
- the gas channel (s) of the directed porosity portion may not end in the gas outlet side end surface of the gas purging plug. At least one gas channel can also open shortly before the face of the gas purging plug in the section with undirected porosity, so that the gas is deflected here.
- the connection channel connects to the actual gas channel.
- the sections with undirected porosity or directed porosity can lie directly against one another. Nevertheless, there is a distance between the gas passages of the section with directed porosity and the pores of the section with undirected porosity which according to the invention can be bridged at one or more points via connection channels.
- connection region from the connection channels to the portion with undirected porosity gas distribution spaces can be formed, either as cavities or in the form of labyrinth-like chambers, the allow a fluidic permeability to the gas. Accordingly, such chambers / rooms may also have a channel-like network system.
- the chambers / spaces extend in the surface area of the portion of undirected porosity, circumferentially or as discrete portions.
- the assignment of the sections can be symmetrical or asymmetrical. According to one embodiment, it is provided to provide at least one portion of undirected porosity substantially perpendicular to the direction of gas flow and to limit this portion radially outward from at least one portion of directed porosity.
- the section with undirected porosity may be designed like a cylinder, while the section with directed porosity has the form of a tube, in the wall of which the gas channels extend, wherein at least one gas channel leads away from at least one connecting channel.
- This embodiment makes it possible to form the bubble-like gas outlet from the section of undirected porosity within the gas flow, which is nozzle-like over the gas channels of the section directed porosity. Furthermore, individual gas passages of the section with directed porosity may be fluidically connected, for example via one or more further channels. This can result in a net-like channel structure.
- the assignment of the sections may also be exactly the opposite, that is to say at least one section with undirected porosity is bounded radially (with respect to the longitudinal axis of the gas purging element) to the inside by at least one section with directed porosity.
- the different sections can also be next to each other.
- the gas ducts can be guided in such a way that they lead angled or curved from their gas connection end to the section with undirected porosity. The part leading to the portion of undirected porosity then forms the connection channel (s).
- Figure I a longitudinal section through a first embodiment of a
- FIG. 1b is a plan view of the section B - B according to FIG. 1a
- FIG. 2a is a longitudinal section through a second embodiment of FIG
- FIG. 2b shows the section BB according to FIG. 2a
- 3a shows a longitudinal section through a third embodiment of a
- FIG. 3 b shows a plan view of section B - B according to FIG. 3 a
- FIG. 4 shows a longitudinal section through a fourth embodiment of FIG
- FIG. 5a a longitudinal section through a fifth embodiment of a
- FIG. 5b shows a longitudinal section offset by 90 degrees relative to FIG. 5a.
- FIG. 5c shows a plan view of the gas purging plug according to FIGS. 5a and 5b.
- FIG. 6 shows a longitudinal section through a gas purging plug in various other embodiments.
- FIG. 1 shows a frustoconical gas purging plug with a central longitudinal axis L-L which is constructed as follows:
- Concentric with the central longitudinal axis LL extends a cylindrical (columnar) portion 12 with undirected porosity from a front side 14 (gas outlet side of the gas purging plug) in the direction of a lower end face 16 of the gas purging plug.
- the section 12 projects with its gas supply end on a portion 18 which is also formed with undirected porosity and a break-through protection against molten metal infiltration with a corresponding wear the rinser forms.
- the section 18 could also be omitted or the section 12 extend continuously to the lower end face 16.
- a gas distribution chamber 24 can be seen, which extends over the entire area of the end face 16. In the gas distribution chamber 24 opens a gas supply line 26. This is prior art and will not be explained here.
- the gas is supplied via the gas supply line 26, the gas distribution chamber 24 into the section 18 and from there into the section 12 or via the gas distribution chamber 24 directly into the gas channel 20.
- the gas escapes pearl-shaped above the section 12 or in the manner of an annular nozzle in the region of Channel 20.
- the sections radially outside and within the gas channel 20 ie the walls of the joint-like gas channel 20
- Such a solids bridge is indicated schematically at 28.
- these are merely discrete individual connection points which do not obstruct the gas flow in the direction of arrow G.
- the figures I a, b further show that a plurality of connecting channels 30, the gas channel 20 with the Section 12 connect (with unge ⁇ chteter porosity), wherein the connecting channels 30 are formed inclined in the direction of the end face 14 to ensure a largely uniform flow direction of the gas between the end faces 16, 14.
- Gas which was first passed into the gas channel 20, is thus at least partially transferred via the connecting channels 30 in the section 12 with undirected porosity and there increases the gas pressure, so that the risk of infiltration of molten metal is reduced in this section.
- the one star-shaped gas channel 20 in the plan view according to FIG. 1b has been replaced by a plurality of discrete gas channels 20 having a circular cross-section.
- a plurality of connecting channels 30 extend to the portion 12 of undirected porosity, which here likewise rests on a lower portion 18.
- the gas channels 20 or connecting channels 30 each have a circular cross-section with a diameter of 0.7 mm.
- a gas channel 20 with connected connecting channels 30 may have a comb shape and be made of a comb-like burnout body with the tines of the comb extending to the portion of undirected porosity.
- each gas channel 20 is connected to a plurality of connecting channels 30, the lead to section 12 with undirected porosity.
- the connecting channels are designed in Figure 3a at different heights in the axial direction of the rinser (LL). They can also be designed differently in and perpendicular to the axial direction.
- the entire gas which is initially supplied via the gas channels 20, is then passed over the section 12 with undirected porosity before it enters the molten metal (adjacent the end face 14).
- the directional / undirected porosity portions are reversed, that is, the undirected porosity portion 12 extends radially outward, the directed porosity portion 22 "inside" with gas passages 20 concentric with the center longitudinal axis LL has circumferentially on a metal jacket 40 which is connected to a bottom plate 42 of the gas distribution chamber 24.
- a gas permeable section 18 connects to the gas distribution chamber 24 and directs the gas into the gas channels 20 of the section 22.
- discrete spacers (not shown) are arranged, on which the sections 12, 22 stand up.
- connecting channels 30 extend obliquely upwards (in the direction of the end face 14), before each in the section 12th opening with unge ⁇ chteter porosity.
- the section 12 may also begin at a distance from the gas distribution chamber 24. Then, the gas supply takes place only via the connecting channels 30.
- the gas channels 20 here have a cross section which resembles a right-angled triangle, wherein the adjoining the right angle sides have a length of 1 and 5 mm.
- the connecting channels 30 have a circular cross-section.
- the gas purging device shows a dishwasher, whose section 22 with directed porosity - similar to in Fig. La, b - a circumferential cylinder-like gas channel 20 (in the manner of a joint) having a width of 1, 2mm ( Figures 5b, 5c ).
- a joint can be produced in the production of the flushing element by, in a known manner, inserting a corresponding film cylinder into the ceramic material of the material and later burning it out. According to the representations of FIGS.
- a special feature here is that tongue-like regions have been cut out of the film cylinder and bent inwardly up to section 12 with undirected porosity, the (after removal) discrete connection channels 30 between the gas channel (after removal) on the finished gas purging element 20 and the porous portion 12 form.
- the porous section 12 has a square cross section (FIG. 5 c) and extends from the gas distribution chamber 24, that is to say from the lower end face 16 to the upper end face 14.
- Gas passes via the gas channel 20 directly into the molten metal which bears against the upper end face 14, via the tongue-like connecting channels 30 into the porous section 12 and directly via the porous section 12 and the end face 14 into the molten metal, that is, there are three basic flow paths for the gas.
- per gas purging / gas purging not only in each case form a portion with undirected and a portion of directed porosity, but also several sections of one or the other kind, as is fundamentally known from DE 199 54 918 Al or DE 37 16 388 C l is known.
- the number and design of the connection channels may vary from case to case.
- FIG. 6 shows a longitudinal section through a frustoconical gas purging plug, in which, by way of example, further alternative embodiments are shown, which can be implemented individually or in combinations in a commercial gas purging plug.
- numeral 12 represents a portion of undirected porosity and numeral 22 a portion of directed porosity, with portioned porosity portion 22 extending around portion 12 of undirected porosity.
- the gas channels 20 are net-shaped, as shown diagrammatically in the enlarged plan view ("A".)
- A a network-like system of gas channels
- Network sections are in fluid communication with each other, so that the gas from a gas inlet side end (at "E") to a gas outlet end (“O") can flow, here from the gas distribution chamber 24 in the direction of the section 12 with undirected porosity
- Such a reticulated gas channel 20 may extend annularly (cylinder-like) about the central portion 12 of undirected porosity and at a distance therefrom, but may also be formed as a discrete section.
- such a gas channel 20 can also extend directly from the gas inlet end (here: at "E") to the end face 14.
- the gas purging plug according to FIG. 6 has a further special feature in that annular gas distribution spaces 44, 46, 48, 50 are formed around the section 12.
- the cuff-shaped gas distribution spaces 44, 46, 48, 50 project into the directed porosity portion 22; conversely, however, they could also be embodied as depressions in the surface region of the section 12 with undirected porosity.
- the gas distribution space 50 shown in Figure 6 above is a cavity, without installation. Connecting channels 30 lead from the gas ducts 20 in the gas distribution chamber 50, where the gas is distributed circumferentially, then to flow through the portion 12 and the existing undirected porosity further up and exit via the end face 14 of the purge.
- a gas distribution space 48 In the embodiment of a gas distribution space 48 shown below, this is formed with a spiral 52 of ceramic material which connects the surface of the portion 12 with the corresponding surface of the portion 22.
- the gas supplied via the connection channels 20 then flows spirally along the gas distribution space 48 and on, as described above.
- the gas distribution space 46 Third from the top, is shaped similar to the gas distribution space 48, with the ceramic spiral 52 here replaced by discrete ceramic solid bridges 52.
- connection channels 30 to the gas distribution spaces 48, 50 are likewise formed with a network structure, similar to the gas channels 20, the connection channels 30 to the gas distribution space 46 are discrete channels.
- a gas distribution space 44 shown in FIG. 6 below is characterized in that a network structure is again formed on channels within this space, similar to a labyrinth, so that the supplied gas is distributed along the reticulated channels in the space 44 and then into the porous section 12 is headed.
- the gas channels 20 extend obliquely to the central longitudinal axis L - L to the gas distribution space 44, wherein the section immediately before the gas distribution space 44 is a connecting channel 30 in the context of the invention.
- Gasverteilaci 44, 46, 48, 50 are realized on a concrete gas purging plug, wherein a plurality of such sections at a distance from each other in the transition region of the sections 12, 22 can be arranged.
- gas distribution space 44, 46, 48, 50 over larger sections along the central longitudinal axis L-L, in extreme cases from the gas inlet-side end to the end surface 14.
- the gas channels, connecting channels, net-like channels, etc. belonging to the directed porosity section 22 can be formed in the manner already described above, namely by corresponding solid bodies used in the production of the ceramic gas purging plug and later burned out. This technology is known as such and therefore will not be further described here.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Furnace Charging Or Discharging (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008029934A DE102008029934B3 (de) | 2008-06-26 | 2008-06-26 | Feuerfester keramischer Gasspülstein |
| PCT/EP2009/000964 WO2009156011A1 (de) | 2008-06-26 | 2009-02-12 | Feuerfester keramischer gasspülstein |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2276863A1 true EP2276863A1 (de) | 2011-01-26 |
| EP2276863B1 EP2276863B1 (de) | 2011-12-21 |
Family
ID=40621506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09768860A Not-in-force EP2276863B1 (de) | 2008-06-26 | 2009-02-12 | Feuerfester keramischer gasspülstein |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2276863B1 (de) |
| AR (1) | AR071950A1 (de) |
| AT (1) | ATE538220T1 (de) |
| CL (1) | CL2009001287A1 (de) |
| DE (1) | DE102008029934B3 (de) |
| ES (1) | ES2377810T3 (de) |
| WO (1) | WO2009156011A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010007126B3 (de) * | 2010-02-05 | 2011-07-07 | Refractory Intellectual Property Gmbh & Co. Kg | Gasspüleinrichtung |
| DE102013107311A1 (de) * | 2013-07-10 | 2015-01-15 | Thyssenkrupp Industrial Solutions Ag | Verfahren und Vorrichtung zur Nachbehandlung des bei der Vergasung anfallenden C-haltigen Bodenproduktes |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH665850A5 (de) * | 1985-08-09 | 1988-06-15 | Burbach & Bender Ohg | Gasspuelstein fuer metallurgische gefaesse. |
| DE3716388C1 (de) * | 1987-05-15 | 1988-10-27 | Radex Deutschland Ag | Gasspuelstein |
| DE4103837A1 (de) * | 1991-02-08 | 1992-08-13 | Plibrico Gmbh | Einblasvorrichtung fuer ein metallurgisches gefaess |
| DE19954918C2 (de) * | 1999-11-16 | 2001-09-20 | Veitsch Radex Gmbh Wien | Feuerfester keramischer Gasspülstein |
| JP2002327218A (ja) * | 2001-04-26 | 2002-11-15 | Nippon Steel Corp | 溶融金属容器用のガス吹き込み羽口構造 |
| MXPA04012192A (es) * | 2002-06-07 | 2005-02-25 | Vesuvius Crucible Co | Dispositivo de inyeccion y procedimiento para inyeccion de un fluido. |
-
2008
- 2008-06-26 DE DE102008029934A patent/DE102008029934B3/de not_active Expired - Fee Related
-
2009
- 2009-02-12 WO PCT/EP2009/000964 patent/WO2009156011A1/de not_active Ceased
- 2009-02-12 AT AT09768860T patent/ATE538220T1/de active
- 2009-02-12 ES ES09768860T patent/ES2377810T3/es active Active
- 2009-02-12 EP EP09768860A patent/EP2276863B1/de not_active Not-in-force
- 2009-05-25 CL CL2009001287A patent/CL2009001287A1/es unknown
- 2009-05-29 AR ARP090101931A patent/AR071950A1/es unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009156011A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009156011A1 (de) | 2009-12-30 |
| EP2276863B1 (de) | 2011-12-21 |
| CL2009001287A1 (es) | 2010-06-25 |
| AR071950A1 (es) | 2010-07-28 |
| DE102008029934B3 (de) | 2009-06-10 |
| ES2377810T3 (es) | 2012-04-02 |
| ATE538220T1 (de) | 2012-01-15 |
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