EP1526940A1 - Fire resistant ceramic part - Google Patents
Fire resistant ceramic partInfo
- Publication number
- EP1526940A1 EP1526940A1 EP03784140A EP03784140A EP1526940A1 EP 1526940 A1 EP1526940 A1 EP 1526940A1 EP 03784140 A EP03784140 A EP 03784140A EP 03784140 A EP03784140 A EP 03784140A EP 1526940 A1 EP1526940 A1 EP 1526940A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- walls
- component according
- inner surfaces
- section
- sections
- 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 abstract 2
- 230000009970 fire resistant effect Effects 0.000 title abstract 2
- 239000011214 refractory ceramic Substances 0.000 claims description 6
- 238000005266 casting Methods 0.000 abstract description 5
- 239000002184 metal Substances 0.000 description 18
- 239000000155 melt Substances 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D35/00—Equipment for conveying molten metal into beds or moulds
- B22D35/04—Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/003—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with impact pads
Definitions
- the invention relates to a refractory ceramic component, which can be designed, for example, in the form of an impact pot or a melting channel.
- a metal melt which is poured into an intermediate vessel (tundish), for example after a ladle treatment, leads to considerable mechanical loads on the area of the refractory tundish lining on which the melt occurs, due to the sometimes high flow speed (for example: 3 m / s). There is also turbulence, at least in the vicinity of the impact point.
- the kinetic energy of the melt jet is, for example, 2 to 10 Ws / kg.
- baffle plate In order to keep the wear of the regular refractory lining within limits, it is known to strengthen the impact area of the melt by a so-called baffle plate.
- the baffle plate can be made of highly wear-resistant refractory materials.
- baffle pot essentially corresponds to a baffle plate.
- the known baffles are designed in such a way that they have a cross-sectional taper at the upper end, ie where the melt is supplied, but also where the melt leaves the baffle. In this way, an "undercut" profile is created.
- the invention is based on the object of structurally optimizing such a refractory ceramic component, so that ; at least one, preferably all, of the following tasks can be solved:
- the invention is based on the consideration of designing the component such that, on the one hand, the direction of the metal melt supplied is reversed, and on the other hand, the kinetic energy of the melt is reduced.
- the flow is to be diverted through a lateral limitation of the component.
- the invention provides a special orientation / inclination of the corresponding inner surfaces of the boundary walls.
- the kinetic energy can be reduced by a kind of diffuser effect.
- the type and extent of energy degradation depend on the angle of inclination of the inner surfaces of the walls.
- the invention in its most general embodiment relates to a refractory ceramic component with the following features.
- the walls extend from opposite sections of the floor in such a way that their inner surfaces, at least in sections, run at an angle> 0 and ⁇ 90 degrees to a plane, perpendicular to the floor, and with an opposite inclination, an opening is formed between free ends of the walls,
- the distance between the inner surfaces of the walls in the area of the free ends of the walls and the bottom ends of the walls can be greater than at least one area in between.
- the kinetic energy of the melt is efficiently reduced in the area between the bottoms and the constriction.
- an uncontrolled spraying - (an uncontrolled rebound) of the molten metal is avoided.
- a type of diffuser is formed in the area between the constriction and the (upper) outlet end. The widening of the cross-section at the outlet end is intended to avoid an interaction of the outflowing metal melt with the melt jet supplied (in the middle). On the contrary: the dimensioning should take place in such a way that the return flow of the molten metal is calmed down.
- the said angle of inclination is between 10 and 80 degrees, and according to a further embodiment between 30 and 60 degrees.
- the described oblique course of the inner wall surfaces is sufficient in principle.
- a kind of “V-shaped cross section of the delivery space” is formed at least above the constriction for the molten metal. If the mold is filled, the molten metal can spray around in an uncontrolled manner, depending on the angle of impact, before it rises again from the bottom up and out of the This is now prevented by the mentioned reduction in cross-section between the walls (above the floor).
- a further development of the invention provides for forming individual walls or several sections of the inner surfaces of the walls mentioned with different angles of inclination.
- baffles, flow brakes or flow guides can be formed on the inner walls of the component and asymmetrical geometries.
- the individual inclination sections can either merge directly (continuously) (as stated, also with different ones) Angles).
- the constriction mentioned can be caused by such a "tooth geometry" be formed.
- the inner surfaces of the walls can have rounded, mutually directed profile sections or groove-like depressions.
- the component can also be designed like a pot.
- these can be connected at the ends, so that a closed component with, for example, oval or round inner cross section (and / or outer cross section) is formed.
- at least two further walls can be provided which connect the two walls already described to form a (rectangular or polygonal) pot shape.
- Profiles of the circumferential inner wall can run like a screw, thread or spiral.
- the ratio of height: width (of the interior delimited by the walls) can vary over a wide range. It will usually be> 2: 1 to 1: 4, but can easily go up to 1:15. The same applies to the ratio of height: maximum diameter in the case of the cup-like geometries described.
- the component in which the cross section of the opening between the walls at the outlet end of the melt is larger than at the bottom end, the component can generally be produced in one piece without problems, for example by casting or pressing. Any undercuts can be formed, for example, by burnout fillers during manufacture.
- connecting surfaces can also be arranged horizontally (parallel to the floor), vertically (perpendicular to the floor), with an angle of inclination> 90 ° to the vertical or with a curved profile.
- FIG. 1 shows a possible basic geometry of a component according to the invention with a floor 10.
- Two walls 12, 14 extend with wall sections 12u, 14u from opposite sections 101, 10 of the floor 10, namely in the same direction (namely upwards) , but with opposite inclination, first directed towards each other (up to a minimum distance d m ⁇ ,) and then diverging (wall sections 12o, 14o)
- the maximum distance between the lower wall sections 12u, 14u of the walls 12, 14 is indicated by d
- the distance between the upper sections of the walls 12, 14 in the region of their free ends 12r, 14r is identified by D.
- the walls 12, 14 are mirror images of an imaginary plane of symmetry EE.
- the angle of inclination a of the lower sections of the walls 12, 14 is approximately 70 ° to the top of the base 10.
- the upper sections of the walls 12, 14 run at an angle b of approximately 20 ° to a plane parallel to the plane EE.
- Metal melt fed in the direction of the arrow ZI reaches the base 10 and is deflected in the direction of the arrow Z2 and finally led upwards in the direction of the arrow Z3 until it is led away over the outer edge 12r, 14r of the walls.
- the kinetic energy of the supplied melt is reduced between the base 10 and the mentioned constriction point 11.
- the cross-sectional tapering also prevents uncontrolled splashing of the melt.
- a diffuser zone is formed in the section between the constriction 11 and the upper opening O (between the inner surfaces of the edge sections 12r, 14r), in which the melt can escape from the component undisturbed and in laminar flow, while in the middle (according to arrow ZI) new metal melt can enter the component.
- the component according to Figure 1 is designed as a gutter.
- a first inner wall section 12.1 initially runs from the floor 10 at an angle a to the plane EE of approximately 45 degrees. This section is adjoined by a section 12.2 running parallel to the floor 10 and running inwards (in the direction of the opposite wall 14). This section 12.2 is followed by a further section 12.3 which extends at an angle ⁇ of approximately 40 degrees to the plane EE up to the upper edge 12r of the wall 12. Between the sections 12.2 and 12.3, the wall distance d m i n ie the smallest.
- the interior R of the component has an essentially V-shaped geometry between the base 10 and the outer edge 12r, 14r, but with an undercut zone 20. This leads to a controlled change in direction of the metal melt supplied.
- the redirected melt jet is swirled.
- the melt loses its direction of flow.
- the kinetic energy is largely destroyed immediately after casting and afterwards.
- the embodiment according to FIG. 3 is similar to that according to FIG. 2, but the component shown here is a rotationally symmetrical, pot-like component, that is to say a kind of impact pot.
- the rotational symmetry results in relation to an imaginary central longitudinal axis MM.
- the inner wall 12 between the sections 12.1 and 12.3 is characterized by a further inclined section 12.4 and a further horizontally running section 12.5, which results in a further undercut zone 22.
- the angle of inclination ⁇ of section 12.4 is greater than the angle of inclination ⁇ of section 12.3.
- wall surface 14 the opposite wall surface shown in FIG. 3 can be referred to as wall surface 14. From a technical point of view, it is of course the same wall surface 12 that is shown in the left part of the figure, " because this wall rotates due to the pot geometry described.
- the floor 10 has a spherical surface 10, which could also be curved in reverse.
- FIG. 4 shows a further embodiment of a baffle pot, with a lower, inclined wall section 12.1 being followed by a wall section 12.6 which runs perpendicular to the floor 10 and which is followed by a bead-like inner wall surface 12.7 which extends towards the free outer edge 12r of the baffle top. expanded towards the outside, so that the impact pot has a significantly larger inner diameter Q at the upper free end than in the area of the impact surface 24 of the base 10 (diameter q). Again between the floor area 10 and the opening 0 is the point with the smallest cross section of the space R (q m ; n ).
- FIG. 4 also results in a circumferential undercut (groove-like) zone 20 which serves to control and calm the metallurgical melt and to reduce the kinetic energy of the melt.
- a circumferential undercut (groove-like) zone 20 which serves to control and calm the metallurgical melt and to reduce the kinetic energy of the melt.
- the body can be made in one piece from a casting compound (for example based on Al 2 O 3 ).
- Figure 4 shows - dashed - also a possible form of modification.
- the more or less rectilinearly adjoining wall sections 12.1, 12.6 and 12.7 are designed to flow, merge into one another, the part of the surface section 12.7 facing the opening mouth O being designed with an additional concave curvature.
- Reverse curvature (convex curvature) also corresponds to the claimed object.
- One or more inner floor and wall surface (s) of the impact body (component) described can be straight or curved, namely convex and concave curved, also merging, with the same or different angles of inclination / radius of curvature. This allows the flow behavior of the melt to be adapted to the specific application.
- the curved wall sections 12.1, 12.6 and 12.7 each have different angles at which they run to the plane E-E.
- the tangent T is applied to the point P, which lies on the surface section 12.7 facing the opening mouth O. At the point P, which lies on the surface section 12.7 facing the opening mouth O.
- the surface section 12.7 runs at an angle ⁇ of approximately 80 degrees to the plane E-E.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Furnace Charging Or Discharging (AREA)
- Ink Jet (AREA)
- Building Environments (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Ceramic Products (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Thermistors And Varistors (AREA)
- Inorganic Insulating Materials (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10235867 | 2002-08-05 | ||
DE10235867A DE10235867B3 (en) | 2002-08-05 | 2002-08-05 | Refractory ceramic component |
PCT/EP2003/008535 WO2004014585A1 (en) | 2002-08-05 | 2003-08-01 | Fire resistant ceramic part |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1526940A1 true EP1526940A1 (en) | 2005-05-04 |
EP1526940B1 EP1526940B1 (en) | 2005-12-14 |
Family
ID=31501726
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03784140A Expired - Lifetime EP1526940B1 (en) | 2002-08-05 | 2003-08-01 | Refractory ceramic part |
Country Status (15)
Country | Link |
---|---|
US (1) | US7128247B2 (en) |
EP (1) | EP1526940B1 (en) |
CN (1) | CN1298464C (en) |
AT (1) | ATE312678T1 (en) |
AU (1) | AU2003258559B2 (en) |
BR (1) | BR0305743B1 (en) |
CA (1) | CA2466646C (en) |
DE (2) | DE10235867B3 (en) |
EG (1) | EG23513A (en) |
ES (1) | ES2253708T3 (en) |
MX (1) | MXPA04005836A (en) |
PL (1) | PL199731B1 (en) |
RU (1) | RU2284246C2 (en) |
TW (1) | TWI238748B (en) |
WO (1) | WO2004014585A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2014220873B2 (en) * | 2013-02-25 | 2016-01-21 | Refractory Intellectual Property Gmbh & Co. Kg | Refractory impact pad |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007035452B4 (en) | 2007-07-26 | 2013-02-21 | Pa-Ha-Ge Feuerfeste Erzeugnisse Gmbh & Co. Kg | impact absorber |
US8066935B2 (en) * | 2007-12-14 | 2011-11-29 | The Harrison Steel Castings Company | Turbulence inhibiting impact well for submerged shroud or sprue poured castings |
SI2418032T1 (en) | 2010-07-19 | 2013-02-28 | Refractory Intellectual Property Gmbh & Co. Kg | Flame-retardant ceramic impact absorber |
RU2507028C1 (en) * | 2012-12-06 | 2014-02-20 | Общество С Ограниченной Ответственностью "Группа "Магнезит" | Hearth |
SI2865464T1 (en) | 2013-10-22 | 2016-06-30 | Refractory Intellectual Property Gmbh & Co. Kg | Fireproof ceramic impact pad |
US9308581B2 (en) * | 2014-03-28 | 2016-04-12 | ArceloMittal Investigacion y Desarrollo, S.L. | Impact pad, tundish and apparatus including the impact pad, and method of using same |
ES2846950T3 (en) * | 2015-08-17 | 2021-07-30 | Nippon Steel Corp | Annular dam |
JP6452633B2 (en) * | 2016-01-18 | 2019-01-16 | 東京窯業株式会社 | Firing precast block |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6324A (en) * | 1849-04-17 | Piston-valve cut-off | ||
US729393A (en) * | 1902-04-19 | 1903-05-26 | William Newman | Knotter for grain-binders. |
US790873A (en) * | 1905-01-03 | 1905-05-23 | Lodge & Shipley Machine Tool Company | Head-stock for lathes. |
US5188796A (en) * | 1990-05-29 | 1993-02-23 | Magneco/Metrel, Inc. | Tundish impact pad |
US5358551A (en) * | 1993-11-16 | 1994-10-25 | Ccpi, Inc. | Turbulence inhibiting tundish and impact pad and method of using |
CN2192420Y (en) * | 1994-06-07 | 1995-03-22 | 河南省安阳钢铁公司 | Combined ladle pouring protection and molten steel guiding device |
BR9509706A (en) * | 1994-11-09 | 1997-10-28 | Foseco Int | Shock absorber for distributor and distributor to accommodate a volume of liquid steel |
GB9517633D0 (en) * | 1995-08-30 | 1995-11-01 | Foseco Int | Tundish impact pad |
DE19542367C2 (en) * | 1995-11-14 | 1999-06-02 | Feuerfest Technik M B H Ges | Metallurgical vessel and method of manufacturing or repairing the same, and plate therefor |
GB9607556D0 (en) * | 1996-04-11 | 1996-06-12 | Foseco Int | Tundish impact pad |
US6102260A (en) * | 1996-11-21 | 2000-08-15 | Psc Technologies, Inc. | Impact pad |
GB9816458D0 (en) * | 1998-07-29 | 1998-09-23 | Foseco Int | Tundish impact pad |
GB9903937D0 (en) * | 1999-02-22 | 1999-04-14 | Foseco Int | Tundish impact pad |
GB9913241D0 (en) * | 1999-06-08 | 1999-08-04 | Foseco Int | Impact pad for tundish |
US6554167B1 (en) * | 2001-06-29 | 2003-04-29 | North American Refractories Co. | Impact pad |
DE10143396C1 (en) * | 2001-09-04 | 2002-11-28 | Rhi Ag Wien | Baffle pot used for casting molten metal comprises a base and a peripheral wall which delimits a chamber and a feed opening for a molten metal lying opposite the base |
CN2516294Y (en) * | 2001-12-25 | 2002-10-16 | 王文刚 | Continuous casting tundish impact groove |
-
2002
- 2002-08-05 DE DE10235867A patent/DE10235867B3/en not_active Expired - Fee Related
-
2003
- 2003-08-01 DE DE50301952T patent/DE50301952D1/en not_active Expired - Lifetime
- 2003-08-01 CA CA002466646A patent/CA2466646C/en not_active Expired - Fee Related
- 2003-08-01 CN CNB038032414A patent/CN1298464C/en not_active Expired - Lifetime
- 2003-08-01 AT AT03784140T patent/ATE312678T1/en active
- 2003-08-01 MX MXPA04005836A patent/MXPA04005836A/en active IP Right Grant
- 2003-08-01 BR BRPI0305743-7A patent/BR0305743B1/en not_active IP Right Cessation
- 2003-08-01 US US10/494,653 patent/US7128247B2/en not_active Expired - Fee Related
- 2003-08-01 EP EP03784140A patent/EP1526940B1/en not_active Expired - Lifetime
- 2003-08-01 WO PCT/EP2003/008535 patent/WO2004014585A1/en not_active Application Discontinuation
- 2003-08-01 ES ES03784140T patent/ES2253708T3/en not_active Expired - Lifetime
- 2003-08-01 RU RU2004113204/02A patent/RU2284246C2/en not_active IP Right Cessation
- 2003-08-01 PL PL369961A patent/PL199731B1/en unknown
- 2003-08-01 AU AU2003258559A patent/AU2003258559B2/en not_active Ceased
- 2003-08-05 TW TW092121387A patent/TWI238748B/en not_active IP Right Cessation
- 2003-08-05 EG EG2003080763A patent/EG23513A/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2004014585A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2014220873B2 (en) * | 2013-02-25 | 2016-01-21 | Refractory Intellectual Property Gmbh & Co. Kg | Refractory impact pad |
Also Published As
Publication number | Publication date |
---|---|
ATE312678T1 (en) | 2005-12-15 |
ES2253708T3 (en) | 2006-06-01 |
US7128247B2 (en) | 2006-10-31 |
DE10235867B3 (en) | 2004-04-08 |
RU2284246C2 (en) | 2006-09-27 |
BR0305743A (en) | 2004-09-28 |
RU2004113204A (en) | 2005-08-20 |
WO2004014585A1 (en) | 2004-02-19 |
DE50301952D1 (en) | 2006-01-19 |
TW200414951A (en) | 2004-08-16 |
MXPA04005836A (en) | 2005-05-17 |
CN1628006A (en) | 2005-06-15 |
CA2466646C (en) | 2009-07-28 |
BR0305743B1 (en) | 2011-05-31 |
AU2003258559B2 (en) | 2005-06-02 |
US20040256775A1 (en) | 2004-12-23 |
EP1526940B1 (en) | 2005-12-14 |
CA2466646A1 (en) | 2004-02-19 |
CN1298464C (en) | 2007-02-07 |
PL199731B1 (en) | 2008-10-31 |
EG23513A (en) | 2006-03-08 |
TWI238748B (en) | 2005-09-01 |
PL369961A1 (en) | 2005-05-02 |
AU2003258559A1 (en) | 2004-02-25 |
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