EP2827088A1 - Tap hole measuring device for a bof vessel and method for measuring the thickness of a refractory lining in a tap hole of a bof vessel - Google Patents
Tap hole measuring device for a bof vessel and method for measuring the thickness of a refractory lining in a tap hole of a bof vessel Download PDFInfo
- Publication number
- EP2827088A1 EP2827088A1 EP13176459.9A EP13176459A EP2827088A1 EP 2827088 A1 EP2827088 A1 EP 2827088A1 EP 13176459 A EP13176459 A EP 13176459A EP 2827088 A1 EP2827088 A1 EP 2827088A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tap hole
- measuring device
- rod
- monitoring car
- movable monitoring
- 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- Withdrawn
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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
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/0021—Devices for monitoring linings for wear
-
- 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
- C21C5/4673—Measuring and sampling devices
-
- 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
- C21C5/44—Refractory linings
- C21C5/445—Lining or repairing the taphole
Definitions
- the present invention is related to a tap hole measuring device for a BOF vessel used in steel production, the BOF vessel, comprising an internal refractory lining and a tap hole, which includes an opening and a flange with a planar surface.
- the present invention is also related to a method for measuring the thickness of a refractory lining in a tap hole of a BOF vessel using the tap hole measuring device.
- a Basic Oxygen Furnace is a steel making furnace which converts hot metal and steel scrap into steel by the oxidizing action of oxygen, which is blown through a lance into the metal melt above the slag line. Almost 70 % of all steel in the world is produced on BOFs.
- Refractory bricks for lining BOFs are made either of resin bonded magnesite or tar bonded mixtures of magnesite (MgO) and burnt lime (CaO).
- MgO resin bonded magnesite
- CaO burnt lime
- the regular inspection of the lining of a BOF is therefore essential for its successful operation.
- One example is the laser measurement technology using a non-contact measurement of the lining in metallurgical vessels via a pulsed laser beam which is deflected by a rotating mirror system.
- This technology is known commercially as LaCam from Minteq Ferrotron.
- Another example of laser measuring technology is laser contouring technology (LCS) provided by Process Metrix. Using these technologies a three dimensional frame of the vessel's inner surface is created in a very short time.
- These technologies require a scanning unit with a pulsed semiconductor diode laser with electro-optical range measurement and a two axis scanning mechanism.
- the measurement must be performed in different angular directions.
- the range data together with the associated angles enables a 3D image of the vessel. As can be seen, this is a very sophisticated and expensive system. Even the use of mobile units incorporating the mentioned technology requires a high investment and trained personnel.
- the tap hole which is used to pour the steel to a ladle at the end of production cycle, is positioned usually on the side of the BOF in the transition zone between the cylindrical shell and the upper cone. Since the BOF is capable of rotating around its horizontal axis on trunnions driven by electric motors, the tap hole can be easily positioned on the level of a platform from which an operator may execute a measurement of its length.
- One existing method is to insert a metal ruler with a bended end inside the tap hole and read its length.
- the bended end must engage against the lining surface inside the vessel.
- the measurement of the length is performed on regular intervals after a determined number of heats.
- the progressive wear of the lining in the tap hole region inside the vessel can so be registered.
- the present invention presents a technology which allows a precise and quick measurement of the lining thickness in the region of the tap hole in a BOF.
- the device of the present invention has a relative low cost and does not require a skilled operator for its proper handling.
- the present invention describes a device and a method for measuring the lining thickness in the tap hole region of a BOF.
- the device comprises a movable monitoring car with a support structure and a laser measuring device.
- the movable monitoring car can be properly protected against the heat coming from the BOF, especially from the open tap hole. It also includes a rod, with a predetermined length, with one end to be inserted in a tubular coupling sleeve in the support structure and a fan shaped washer to be mounted on the other end of the rod.
- the tubular coupling sleeve of the support structure is adjustable in height to allow the insertion of the rod with the fan-shaped washer inside the tap hole in aligned conditions.
- the rod is inserted with its longitudinal axis aligned with the longitudinal axis of the tap hole.
- the method of measurement includes the step of positioning the tap hole of a BOF at the level of a platform.
- the movable monitoring car is transported at the platform close to the tap hole with the rod inserted in the tubular coupling sleeve of the support structure and the fan-shaped washer mounted at the opposed end of the rod.
- the fan-shaped washer has an outer diameter that is greater than the diameter of the tap hole opening, with the effect that the rod with the fan-shaped washer is inserted with interference inside the tap hole causing thereby a resistance against its movement through the tap hole. When this resistance against the insertion movement ends the fan-shaped washer is already inside the BOF vessel.
- the movable monitoring car is thereafter pulled back until a resistance is felt again, the said resistance resulting from the fan-shaped washer facing the internal lining wall of the BOF.
- the movable monitoring car is stopped and the laser measuring device is used to determine the distance between the movable monitoring car and the surface of the flange of the tap hole. Since the distance between the surface of the flange and the internal face of the steel wall of the BOF is known from its project, it is possible to determine the remaining thickness of the refractory lining inside the BOF in the region of the tap hole.
- the tap hole measuring device comprises a movable monitoring car 7, which is mounted on wheels 12 to allow its displacement on the platform 6.
- the car 7 is built of a welded metal structure, which allows the installation of a heat shield 14 to protect the operator from the high temperatures in the region close to the BOF, especially with an open tap hole 2.
- a metal structure 13 supports a tubular coupling sleeve 10.
- the tubular coupling sleeve 10 has an inner diameter that allows the insertion of a steel rod 8.
- the rod 8, which can be shaped alternatively as a pipe and/or present different non circumferential cross sections, can be fixed in a releasable manner to the tubular coupling sleeve 10.
- a fan-shaped metal washer 9 is fixed through a mechanical or welded connection to the rod 8.
- a laser measuring device 11 is positioned in a fixed manner in the vicinity of the tubular coupling sleeve 10.
- the laser measuring device 11 used is a commercial model with a range usually of 0,05 to 60 m and with a memory to storage the measurements.
- the laser measuring device 11 is positioned in the metal structure 13 in such a way that its measurement starts from the same point in a vertical axis as the end of the rod 8 abuts an internal backstop at the tubular coupling sleeve 10. This means that the laser measuring device 11 is positioned to measure exactly a distance in a parallel axis to the rod 8 starting from its end inserted in the tubular coupling sleeve 10.
- FIG 2 the movable monitoring car 7 can be seen from the front side showing the fan-shaped washer 9 and the heat shield 14.
- the movable monitoring car 7 is positioned on the platform 6.
- the BOF 1 has its tap hole 2 in a direction which is parallel to the surface of the platform 6.
- the tap hole 2 has an external flange 4, with a corresponding planar surface perpendicular to platform 6.
- the rod 8 is inserted in and fixed to the tubular coupling sleeve 10.
- the rod 8 has a defined length, which can be, for example 3000 mm, or any other length that allows a safe handling of the device and a correct measurement of the tap hole length.
- the fan-shaped washer 9 is mechanically fixed to the rod 8.
- the tubular coupling sleeve 10 is adjustable in height at the support structure 13 which allows compensating any difference in height of the platform 6 in relation to the tap hole 2.
- the measuring method of the present invention is performed with the measuring device described above and realized quickly with a short number of steps as shown in figures 3 to 6 .
- the BOF vessel 1 is tilted in a way that the longitudinal axis of the opening 5 of the tap hole 2 is parallel to the surface of the platform 6.
- the tap hole 2 has a flange 4 with a planar surface that is perpendicular to the surface of the platform 6.
- the rod 8 is inserted in the tubular coupling sleeve 10 and fixed in a releasable manner.
- the fan-shaped washer 9 is fixed at the opposed end of the rod 8.
- the distance between the fan-shaped washer 9 and the internal backstop at the tubular coupling sleeve 10, which corresponds to the length of the rod 8, is known and will be designated as "X".
- the laser measuring device 11 is positioned at the support structure 13 with its measuring point starting at the same point in a vertical axis as the abut point between the internal backstop of the tubular coupling sleeve 10 and the end of the rod 8.
- the calculation of the thickness of the refractory lining 3 inside the BOF vessel 1 is performed in a simple way.
- the distance from the planar surface of the flange 4 to the internal metal wall of the BOF vessel 1 is known from its project and will be designated as "Z".
- T X - Y + Z X, being the length of the rod 8
- Y being the distance measured by the laser measuring device 11.
- Z being the project distance between the planar vertical surface of flange 4 and the inner metal wall of BOF vessel 1.
- the rod 8 is released from the tubular coupling sleeve 10.
- the movable monitoring car 7 is pulled back from the rod 8.
- the rod 8 and the fan-shaped washer 9 are disposed inside the BOF vessel 1 and will be mixed to the metal scrap used for the subsequent heat.
- the BOF vessel 1 is tilted back to its vertical position.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention describes a tap hole measuring device for a BOF vessel used in steel production, the BOF vessel (1), comprising an internal refractory lining (3) and a tap hole (2), which includes an opening (5) and a flange (4) with a planar surface. The measuring device comprises a movable monitoring car (7), a steel rod (8) with a fan-shaped metal washer (9) mounted on one end of the rod (8), the other end of the rod (8) being fixed in a releasable manner in a tubular coupling sleeve (10) of the movable monitoring car (7) and a laser measuring device (11) placed in the vicinity and aligned parallel to the rod (8) on the movable monitoring car (7). The present invention is also related to a method for measuring the thickness of a refractory lining in a tap hole (2) of a BOF vessel (1) using the tap hole measuring device.
Description
- The present invention is related to a tap hole measuring device for a BOF vessel used in steel production, the BOF vessel, comprising an internal refractory lining and a tap hole, which includes an opening and a flange with a planar surface. The present invention is also related to a method for measuring the thickness of a refractory lining in a tap hole of a BOF vessel using the tap hole measuring device.
- A Basic Oxygen Furnace (BOF) is a steel making furnace which converts hot metal and steel scrap into steel by the oxidizing action of oxygen, which is blown through a lance into the metal melt above the slag line. Almost 70 % of all steel in the world is produced on BOFs.
- The refractory lining of BOFs work under severe conditions, i.e. very high temperatures and an oxidizing atmosphere. Especially in the slag line there is a fast wearing of the lining. Refractory bricks for lining BOFs are made either of resin bonded magnesite or tar bonded mixtures of magnesite (MgO) and burnt lime (CaO). A properly maintained lining may serve up to 20.000 heats.
- The regular inspection of the lining of a BOF is therefore essential for its successful operation. There are several technologies presently in use to control the thickness of the lining inside a BOF. One example is the laser measurement technology using a non-contact measurement of the lining in metallurgical vessels via a pulsed laser beam which is deflected by a rotating mirror system. One example of this technology is known commercially as LaCam from Minteq Ferrotron. Another example of laser measuring technology is laser contouring technology (LCS) provided by Process Metrix. Using these technologies a three dimensional frame of the vessel's inner surface is created in a very short time. These technologies, however, require a scanning unit with a pulsed semiconductor diode laser with electro-optical range measurement and a two axis scanning mechanism. The measurement must be performed in different angular directions. The range data together with the associated angles enables a 3D image of the vessel. As can be seen, this is a very sophisticated and expensive system. Even the use of mobile units incorporating the mentioned technology requires a high investment and trained personnel.
- A simpler and not so cost intensive method of measuring the lining at the tap hole is necessary. The tap hole, which is used to pour the steel to a ladle at the end of production cycle, is positioned usually on the side of the BOF in the transition zone between the cylindrical shell and the upper cone. Since the BOF is capable of rotating around its horizontal axis on trunnions driven by electric motors, the tap hole can be easily positioned on the level of a platform from which an operator may execute a measurement of its length.
- One existing method is to insert a metal ruler with a bended end inside the tap hole and read its length. The bended end must engage against the lining surface inside the vessel. The measurement of the length is performed on regular intervals after a determined number of heats. The progressive wear of the lining in the tap hole region inside the vessel can so be registered.
- This simple solution has the problem of lack of precision and requires a skilled operator to correctly engage the bended end of the ruler against lining wall, furthermore it must be performed quickly due to the heat coming out of the tap hole, which also may deform the ruler.
- The present invention presents a technology which allows a precise and quick measurement of the lining thickness in the region of the tap hole in a BOF. The device of the present invention has a relative low cost and does not require a skilled operator for its proper handling.
- The present invention describes a device and a method for measuring the lining thickness in the tap hole region of a BOF.
- The device comprises a movable monitoring car with a support structure and a laser measuring device. The movable monitoring car can be properly protected against the heat coming from the BOF, especially from the open tap hole. It also includes a rod, with a predetermined length, with one end to be inserted in a tubular coupling sleeve in the support structure and a fan shaped washer to be mounted on the other end of the rod. The tubular coupling sleeve of the support structure is adjustable in height to allow the insertion of the rod with the fan-shaped washer inside the tap hole in aligned conditions. The rod is inserted with its longitudinal axis aligned with the longitudinal axis of the tap hole.
- The method of measurement includes the step of positioning the tap hole of a BOF at the level of a platform. The movable monitoring car is transported at the platform close to the tap hole with the rod inserted in the tubular coupling sleeve of the support structure and the fan-shaped washer mounted at the opposed end of the rod. The fan-shaped washer has an outer diameter that is greater than the diameter of the tap hole opening, with the effect that the rod with the fan-shaped washer is inserted with interference inside the tap hole causing thereby a resistance against its movement through the tap hole. When this resistance against the insertion movement ends the fan-shaped washer is already inside the BOF vessel. The movable monitoring car is thereafter pulled back until a resistance is felt again, the said resistance resulting from the fan-shaped washer facing the internal lining wall of the BOF. At this point the movable monitoring car is stopped and the laser measuring device is used to determine the distance between the movable monitoring car and the surface of the flange of the tap hole. Since the distance between the surface of the flange and the internal face of the steel wall of the BOF is known from its project, it is possible to determine the remaining thickness of the refractory lining inside the BOF in the region of the tap hole.
- The present invention will be described in detail based on one embodiment shown in the drawings. The figures showing:
-
Figure 1 - is a side view of the tap hole measuring device of the present invention; -
Figure 2 - is a front view of the tap hole measuring device of the present invention; -
Figure 3 - is the first step of the tap hole measuring method according to the present invention; -
Figure 4 - is the second step of the tap hole measuring method according to the present invention; -
Figure 5 - is the third step of the tap hole measuring method according to the present invention; and -
Figure 6 - is the fourth step of the tap hole measuring method according to the present invention. - As it can be seen from
figure 1 the tap hole measuring device comprises amovable monitoring car 7, which is mounted onwheels 12 to allow its displacement on theplatform 6. Thecar 7 is built of a welded metal structure, which allows the installation of aheat shield 14 to protect the operator from the high temperatures in the region close to the BOF, especially with anopen tap hole 2. On the upper part of the car 7 ametal structure 13 supports atubular coupling sleeve 10. Thetubular coupling sleeve 10 has an inner diameter that allows the insertion of asteel rod 8. Therod 8, which can be shaped alternatively as a pipe and/or present different non circumferential cross sections, can be fixed in a releasable manner to thetubular coupling sleeve 10. At the outer end of the rod 8 a fan-shaped metal washer 9 is fixed through a mechanical or welded connection to therod 8. - In the support structure 13 a
laser measuring device 11 is positioned in a fixed manner in the vicinity of thetubular coupling sleeve 10. Thelaser measuring device 11 used is a commercial model with a range usually of 0,05 to 60 m and with a memory to storage the measurements. Thelaser measuring device 11 is positioned in themetal structure 13 in such a way that its measurement starts from the same point in a vertical axis as the end of therod 8 abuts an internal backstop at thetubular coupling sleeve 10. This means that thelaser measuring device 11 is positioned to measure exactly a distance in a parallel axis to therod 8 starting from its end inserted in thetubular coupling sleeve 10. - If necessary counterweights can be placed at the bottom of the
movable monitoring car 7 to compensate the weight of thesteel rod 8. - In
figure 2 themovable monitoring car 7 can be seen from the front side showing the fan-shapedwasher 9 and theheat shield 14. - In
figure 3 themovable monitoring car 7 is positioned on theplatform 6. TheBOF 1 has itstap hole 2 in a direction which is parallel to the surface of theplatform 6. Thetap hole 2 has anexternal flange 4, with a corresponding planar surface perpendicular toplatform 6. Therod 8 is inserted in and fixed to thetubular coupling sleeve 10. Therod 8 has a defined length, which can be, for example 3000 mm, or any other length that allows a safe handling of the device and a correct measurement of the tap hole length. At the opposed end of therod 8 the fan-shapedwasher 9 is mechanically fixed to therod 8. - The
tubular coupling sleeve 10 is adjustable in height at thesupport structure 13 which allows compensating any difference in height of theplatform 6 in relation to thetap hole 2. - The measuring method of the present invention is performed with the measuring device described above and realized quickly with a short number of steps as shown in
figures 3 to 6 . - It can be seen that the
BOF vessel 1 is tilted in a way that the longitudinal axis of theopening 5 of thetap hole 2 is parallel to the surface of theplatform 6. Thetap hole 2 has aflange 4 with a planar surface that is perpendicular to the surface of theplatform 6. Therod 8 is inserted in thetubular coupling sleeve 10 and fixed in a releasable manner. The fan-shapedwasher 9 is fixed at the opposed end of therod 8. The distance between the fan-shapedwasher 9 and the internal backstop at thetubular coupling sleeve 10, which corresponds to the length of therod 8, is known and will be designated as "X". Thelaser measuring device 11 is positioned at thesupport structure 13 with its measuring point starting at the same point in a vertical axis as the abut point between the internal backstop of thetubular coupling sleeve 10 and the end of therod 8. - In
figure 4 the fan-shapedwasher 9 is inserted with therod 8 inside thetap hole 2opening 5. Themovable monitoring car 7 is moved with itswheels 12 over theplatform 6 by an operator in the direction of theBOF vessel 1. Thewasher 9 having an outer diameter bigger than theopening 5 of thetap hole 2 results in a resistance against its insertion movement of thewasher 9 in theopening 5. This resistance ceases in the moment thewasher 9 passes theopening 5 and is inside theBOF vessel 1. - In
figure 5 themovable monitoring car 7 with therod 8 and the fan-shapedwasher 9 is pulled back until the fan-shapedwasher 9 faces the inner wall of therefractory lining 9. As already mentioned the outer diameter of the fan-shapedwasher 9 is bigger than the diameter of theopening 5 of thetap hole 2. At this moment a resistance against the pull back movement is felt by the operator and themovable monitoring car 7 is stopped. Thelaser measuring device 11 is activated and a measurement is made with the laser beam pointing at the planar surface of theflange 4. The distance measured will by designated as "Y" and can be stored at the memory of thelaser measuring device 11. - The calculation of the thickness of the
refractory lining 3 inside theBOF vessel 1 is performed in a simple way. The distance from the planar surface of theflange 4 to the internal metal wall of theBOF vessel 1 is known from its project and will be designated as "Z". - The formula for calculating the thickness "T" of the
lining 3 at the tap hole region reads as follows:
X, being the length of therod 8,
Y, being the distance measured by thelaser measuring device 11.
Z, being the project distance between the planar vertical surface offlange 4 and the inner metal wall ofBOF vessel 1. - After the measurement process, as shown in
figure 6 , therod 8 is released from thetubular coupling sleeve 10. Themovable monitoring car 7 is pulled back from therod 8. Therod 8 and the fan-shapedwasher 9 are disposed inside theBOF vessel 1 and will be mixed to the metal scrap used for the subsequent heat. TheBOF vessel 1 is tilted back to its vertical position. - Having described one preferred embodiment, it should be understood that the scope of the present invention contemplates other possible variations, being limited only by the content of the attached claims, including possible equivalent solutions.
-
- 1-
- BOF vessel
- 2-
- Tap hole
- 3-
- Refractory lining
- 4-
- Flange
- 5-
- Opening of tap hole
- 6-
- Platform
- 7-
- Movable monitoring car
- 8-
- Rod
- 9-
- Fan-shaped washer
- 10-
- Tubular coupling sleeve
- 11-
- Laser measuring device
- 12-
- Wheels
- 13-
- Metal support structure
- 14-
- Heat shield
Claims (7)
- Tap hole measuring device for a BOF vessel used in the steel production, the BOF vessel (1), comprising an internal refractory lining (2) and a tap hole (2), which includes an opening (5) and a flange (4) with a planar surface, characterized in that the measuring device comprises a movable monitoring car (7), a steel rod (8) with a fan-shaped metal washer (9) mounted on one end of the rod (8), the other end of the rod (8) being fixed in a releasable manner in a tubular coupling sleeve (10) of the movable monitoring car (7) and a laser measuring device (11) placed in the vicinity and aligned parallel to the rod (8) on the movable monitoring car (7).
- Tap hole measuring device according to claim 1, characterized in that the movable monitoring car (7) has a metal support structure (13) to receive the tubular coupling sleeve (10) in an adjustable manner.
- Tap hole measuring device according to claim 2, characterized in that the metal support structure (13) receives the laser measuring device (11) placed in the vicinity of the tubular coupling sleeve (10).
- Tap hole measuring device according to anyone of claims 1 to 3, characterized in that the movable monitoring car (7) has a heat shield and wheels (12).
- Tap hole measuring device according to claim 1, characterized in that the steel rod (8) can be shaped as a pipe and/or present non circumferential cross sections.
- Tap hole measuring device according to claim 1, characterized in that the laser measuring device (11) has a range from 0,05 to 60 m.
- Method for measuring the thickness of a refractory lining in a tap hole (2) of a BOF vessel (1) using the tap hole measuring device defined in anyone of claims 1 to 6, the method comprising the steps of:- tilting a BOF vessel (1) to place an opening (5) of a tap hole (2) parallel to a platform (6);- inserting and fixing in a releasable manner the free end of a rod (8), with a fan-shaped washer (9) placed on the opposed end, in a tubular coupling sleeve (10) of a movable monitoring car (7);- moving the movable monitoring car (7) in the direction of the BOF vessel (1) and inserting the fan-shaped washer (9) and the rod (8) inside the opening (5) of the tap hole (2);- stopping the movable monitoring car (7) when no resistance against the insertion movement of the fan-shaped washer (9) and the rod (8) inside the opening (5) is felt by the operator;- pulling back the movable monitoring car (7) until a resistance against this movement is felt by the operator;- activating the laser measuring device (11) with the laser beam measuring the distance until the planar surface of the flange (4) of the tap hole (2);- disconnecting the rod (8) with the fan-shaped washer (9) from the tubular coupling sleeve (10);- pulling back the movable monitoring car (7) away from the rod (8);- discarding the rod (8) with the fan-shaped washer (9) inside the BOF vessel (1).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13176459.9A EP2827088A1 (en) | 2013-07-15 | 2013-07-15 | Tap hole measuring device for a bof vessel and method for measuring the thickness of a refractory lining in a tap hole of a bof vessel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13176459.9A EP2827088A1 (en) | 2013-07-15 | 2013-07-15 | Tap hole measuring device for a bof vessel and method for measuring the thickness of a refractory lining in a tap hole of a bof vessel |
Publications (1)
Publication Number | Publication Date |
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EP2827088A1 true EP2827088A1 (en) | 2015-01-21 |
Family
ID=48795430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP13176459.9A Withdrawn EP2827088A1 (en) | 2013-07-15 | 2013-07-15 | Tap hole measuring device for a bof vessel and method for measuring the thickness of a refractory lining in a tap hole of a bof vessel |
Country Status (1)
Country | Link |
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EP (1) | EP2827088A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN202272911U (en) * | 2011-09-30 | 2012-06-13 | 鞍钢股份有限公司 | Device for measuring corrosion thickness of converter lining |
-
2013
- 2013-07-15 EP EP13176459.9A patent/EP2827088A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN202272911U (en) * | 2011-09-30 | 2012-06-13 | 鞍钢股份有限公司 | Device for measuring corrosion thickness of converter lining |
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