CN101380674A - Ladle wall permanent layer repairing method - Google Patents
Ladle wall permanent layer repairing method Download PDFInfo
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- CN101380674A CN101380674A CNA2008102007955A CN200810200795A CN101380674A CN 101380674 A CN101380674 A CN 101380674A CN A2008102007955 A CNA2008102007955 A CN A2008102007955A CN 200810200795 A CN200810200795 A CN 200810200795A CN 101380674 A CN101380674 A CN 101380674A
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- ladle
- permanent layer
- layer
- working lining
- repairing method
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a patching method for a ladle wall permanent layer; working layers (2) are adhered in the ladle wall permanent layer (1). The operation steps of the method are as follows: step one, after the temperature range of a hot ladle is below 1600 DEG C, the hot ladle is cooled between the room temperature and 45 DEG C; step two, all the working layers (2) of a side wall and a bottom wall are removed; step three, the permanent layer (1) is partially patched; a ladle wall patching material is adopted to carry out patching to the large cracks and damaged parts on the inner wall of the ladle; step four, a fireclay layer (3) is coated in the side wall of the permanent layer (1) completely; step five, a novel working layer (2) is built. The service life of the permanent layer (1) is greatly improved and the working intensity is reduced after the patching method is adopted.
Description
Technical field
The present invention relates to a kind of Ferrous Metallurgy field, particularly a kind of ladle wall permanent layer repairing method.
Background technology
Ladle is as the carrying molten steel and carry out a kind of container of external refining, and its inner lining refractory is divided into permanent layer and working lining is two-layer.Because ladle in use, some impurity in the molten steel are to the erosion of ladle lining fireproof material, add that working lining in use, reasons such as chilling can appear, can make the permanent layer of ladle phenomenons such as crack and damage occur, need carry out local repairing, promptly exist the position of crack and breach to repair with bag wall material for repairing to permanent layer.But this method for repairing and mending can not be repaired timely to some microcracks on the permanent layer, make ladle in next life cycle process, fine crack can continue to enlarge, and makes molten steel pass working lining easily, in these cracks, form cold steel, increased the use danger coefficient of ladle.And after the repairing of this part; working lining and permanent layer are attached on together; the disintegration of unpacking when being not easy to ladle overhaul next time; simultaneously owing to there is not the protective effect in intermediate layer; the feasible machine gun head of unpacking is directly beaten on permanent layer easily; permanent layer is caused in various degree injury, greatly reduce its service life, increased labour intensity.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of ladle ladle wall permanent layer repairing method in service life that prolongs.
For solving the problems of the technologies described above, ladle wall permanent layer repairing method of the present invention sticks a working lining in the ladle wall permanent layer, and its operating procedure is as follows,
The first, hot ladle temperature range 1600 ℃ roll off the production line after;
The second, remove the whole described working lining of sidewall and diapire;
Three, described permanent layer is carried out sectional repair, adopt ladle wall material for repairing to repair at crackle big on the ladle inner wall and damaged location;
Four, in described permanent layer sidewall, all smear the mud layer of getting angry;
Five, build new working lining by laying bricks or stones.
Preferably, chamotte is selected the magnalium chamotte.
Preferably, after described permanent layer being repaired, all on described permanent layer, smear one deck chamotte at every turn.
Preferably, the thickness of chamotte is 1.5mm to 2.5mm.
As the preferred version of such scheme, the thickness of chamotte is 2mm.
Preferably, described hot ladle cooling procedure adopts the air blast chilling, and cool time was at 25～35 hours.
Preferably, when building described new working lining by laying bricks or stones, adopt mould to carry out integrated poured mode, adjust the position of mould, make the consistency of thickness of the working lining each several part that pours into.
After adopting such method for repairing and mending, in the service life of having improved permanent layer, reduced production cost.
Description of drawings
Fig. 1 is the structure chart of the ladle wall after repairing with existing patching.
Fig. 2 is the structure chart of the ladle wall after the present invention repairs.
Fig. 3 is the vertical view of Fig. 2.
Reference numeral is as follows:
1, permanent layer 2, working lining
3, chamotte layer
The specific embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Hot ladle rolls off the production line and is meant when ladle reaches its service life, the maintenance of stopping using, roll off the production line.Ladle rolls off the production line to repair and can be divided into 4 kinds of situations: light maintenance, in repair, overhaul and repairing entirely.Repairing with the ladle of Co., Ltd of Baogang Stocks Trading Co. is example, the light maintenance ladle is meant that the continuous access times of ladle reach 25 times, will roll off the production line and once repair, the repairing content is: air brick and nozzle brick at the bottom of the replacing ladle bag, and repair the more serious position of other melting loss.In when repairing the accumulative total access times that are meant ladle and reaching 100 times, the repairing of rolling off the production line is repaired content and is: changes big prefabricated section and slag line magnesia carbon brick at the bottom of air brick, nozzle brick, the bag.Overhaul is meant when the working lining 2 accumulative total access times of ladle reach 170 times, changes all refractory materials of working lining 2.When repairing the permanent layer 1 accumulative total access times that are meant ladle entirely and reaching more than 500 times, will change all refractory materials (comprising working lining 2 and permanent layer 1) in the ladle.Ladle is reaching above-mentioned four kinds when repairing states, the cooling of all must rolling off the production line from 1600 ℃ hot operation state.
Operating procedure of the present invention is as follows:
At first, with hot ladle after rolling off the production line under 1600 ℃ the high temperature, with its cooling; Ladle is in the cooling of rolling off the production line, and the temperature when human body can enter the ladle operation is generally between room temperature to 45 ℃.Cooling procedure adopts the blower fan chilling usually, promptly adopts powerful blower cools.The time of cooling is generally about 30 hours.
The second, use bale breaker that whole working linings 2 of sidewall and diapire are removed.Sidewall working lining 2, prefabricated section at the bottom of diapire working lining 2, air brick, nozzle brick and the bag.But sidewall permanent layer 1 and diapire permanent layer 1 are not removed reservation.
The 3rd, because some cracks of producing and some mechanical damages that may bring when removing working lining 2 in the ladle use, we must carry out local repairing, with ladle wall material for repairing the routine repairing are carried out at positions such as the large fracture of permanent layer 1 and breach.
The 4th, because the rapid heat cycle process of ladle makes the working lining 2 of ladle integral pouring ladle and permanent layer 1 can produce some small crackles.Life cycle because of permanent layer 1 is long again, adds the erosion of the various impurity of use to heat proof material, can make that crackle is increasing, badly influences the safe in utilization of ladle.Chamotte on permanent layer 1 is smeared on the whole forms chamotte layer 3, and the minute crack on the ladle wall permanent layer 1 is in time repaired.Sectional repair is then smeared chamotte layer 3 to permanent layer 1 integral body after finishing, and so just makes small crackle also obtain repairing timely.3 on chamotte layer spreads upon in the sidewall.Because the work area at the bag end is less, and the light maintenance process of at every turn carrying out is all carried out in position, bag bottom, even there are some problems, in the process of light maintenance, can be resolved, and ladle wall permanent layer 1 has only when ladle carries out large repairs, could repair, so in the process of repairing, we only consider ladle wall permanent layer 1 is repaired.
At last, on chamotte layer 3, build working lining 2 again by laying bricks or stones.Be to adopt integrated poured mode when building working lining 2 by laying bricks or stones.It is similar to concrete casting process.At cast sidewall working lining 2, we adopt some moulds (neutron), and at this moment, we should note adjusting mould (neutron) position, make sidewall working lining 2 each position of cast all equally thick, and the phenomenon that should avoid thin and thick to differ takes place.
This method for repairing and mending of the present invention can not only make positions such as crack and breach in time be repaired, and can also make some minute cracks obtain repairing, can stop fine crack to continue to enlarge so timely and effectively, avoid molten steel in these cracks, to form cold steel, improve the safety coefficient of ladle.Simultaneously, because the existence of this chamotte layer 3 makes working lining 2 and permanent layer 1 when bale breaker is removed working lining 2, the machine gun head of effectively avoiding unpacking is directly beaten on permanent layer 1 again, reduce the mechanical damage that bale breaker causes permanent layer 1 widely, improve the service life of permanent layer 1.
And after the overhaul first time, during each overhaul, after all working lining 2 being communicated with chamotte layers 3 and removing, increased the protection of the new chamotte layer 3 of one deck again.And the selection of chamotte layer 3 foundation is main by the composition of slag and the kind of purified steel are determined.Usually steel mill is mainly selected the magnalium chamotte.The ladle of Baosteel is built the high alumina castable that anti-material is selected for use by laying bricks or stones, and its main component is aluminium oxide and magnesia, and wherein the composition of aluminium accounts for more than 90%.When selecting chamotte for use, consider the coupling between the refractory material and whether can introduce the quality of other impurity effect to product made from steel, and the main component of magnalium chamotte also is aluminium oxide and magnesia, also can not have influence on the quality of product made from steel, so select the magnalium chamotte for use.The thickness range of chamotte layer 3 between 1.5mm to 2.5mm, preferred 2mm.
Before the invention process, the service life of permanent ladle layer 1 is generally 3-4 life cycle.After the invention process, permanent layer 1 reliability is carried out analysis and judgement, and the life cycle of permanent layer 1 improves gradually, and the service life of permanent layer 1 is generally all 4-5 life cycle.Use the stove number from permanent layer 1, bring up to average 700 stove steel at present by original average 500 stove steel.
Simultaneously, when permanent ladle layer 1 is repaired, smear magnalium chamotte layer 3 after, the quantity of repairing ladle in the identical time has entirely significantly reduced many, has reduced production cost, has reduced employee's workload, has reduced labour intensity.Simultaneously, for the operation of unpacking, owing to be provided with the fire-resistant chamotte layer 3 of one deck between working lining 2 and the permanent layer 1, make and separate disintegration easily between working lining 2 and the permanent layer 1.From unpacking the activity duration, the activity duration has shortened half, has improved operating efficiency greatly.
Above-mentioned design example only is used for that the present invention will be described, does not constitute the restriction to the claim scope, and other substantial equivalence means that it may occur to persons skilled in the art that are all in claim protection domain of the present invention.
Claims (6)
1. a ladle wall permanent layer repairing method sticks a working lining (2) in the described ladle wall permanent layer (1), it is characterized in that:
Operating procedure is as follows,
The first, hot ladle temperature range 1600 ℃ roll off the production line after, between the cool to room temperature to 45 ℃;
The second, the whole described working lining (2) of dismounting sidewall and diapire;
The 3rd, described permanent layer (1) is carried out sectional repair, adopt ladle wall material for repairing to repair at crackle big on the ladle inner wall and damaged location;
The 4th, in described permanent layer (1) sidewall, all smear the mud layer of getting angry (3);
The 5th, build new working lining (2) by laying bricks or stones.
2. ladle wall permanent layer repairing method according to claim 1 is characterized in that: described chamotte layer (3) material is selected the magnalium chamotte.
3. ladle wall permanent layer repairing method according to claim 1 is characterized in that: the thickness of described chamotte layer (3) is 1.5mm to 2.5mm.
4. ladle wall permanent layer repairing method according to claim 3 is characterized in that: the thickness of described chamotte layer (3) is 2mm.
5. ladle wall permanent layer repairing method according to claim 1 is characterized in that: described hot ladle cooling procedure adopts the air blast chilling, and cool time was at 25～35 hours.
6. ladle wall permanent layer repairing method according to claim 1 is characterized in that: when building described new working lining (2) by laying bricks or stones, adopt mould to carry out integrated poured mode, adjust the position of mould, make the consistency of thickness of working lining (2) each several part that pours into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102007955A CN101380674B (en) | 2008-10-06 | 2008-10-06 | Ladle wall permanent layer repairing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102007955A CN101380674B (en) | 2008-10-06 | 2008-10-06 | Ladle wall permanent layer repairing method |
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| CN101380674A true CN101380674A (en) | 2009-03-11 |
| CN101380674B CN101380674B (en) | 2011-03-23 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106312032A (en) * | 2015-06-23 | 2017-01-11 | 宝山钢铁股份有限公司 | Online ladle safety residual thickness marking method and corresponding ladle |
| CN106424692A (en) * | 2016-10-26 | 2017-02-22 | 舞阳钢铁有限责任公司 | Constructing and repairing method for minor repair or mend of steel ladle of electric furnace |
| CN107414066A (en) * | 2017-09-18 | 2017-12-01 | 北京利尔高温材料股份有限公司 | A kind of carbon-free ladle wall subsidizes technique |
| CN109974456A (en) * | 2019-03-15 | 2019-07-05 | 首钢集团有限公司 | A kind of vaccum sensitive stove crucible repairing method |
| CN110653450A (en) * | 2019-08-01 | 2020-01-07 | 广东韶钢松山股份有限公司 | Online repairing method for converter body perforation |
-
2008
- 2008-10-06 CN CN2008102007955A patent/CN101380674B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106312032A (en) * | 2015-06-23 | 2017-01-11 | 宝山钢铁股份有限公司 | Online ladle safety residual thickness marking method and corresponding ladle |
| CN106312032B (en) * | 2015-06-23 | 2018-07-06 | 宝山钢铁股份有限公司 | Online ladle residual thick marker method safely |
| CN106424692A (en) * | 2016-10-26 | 2017-02-22 | 舞阳钢铁有限责任公司 | Constructing and repairing method for minor repair or mend of steel ladle of electric furnace |
| CN107414066A (en) * | 2017-09-18 | 2017-12-01 | 北京利尔高温材料股份有限公司 | A kind of carbon-free ladle wall subsidizes technique |
| CN109974456A (en) * | 2019-03-15 | 2019-07-05 | 首钢集团有限公司 | A kind of vaccum sensitive stove crucible repairing method |
| CN110653450A (en) * | 2019-08-01 | 2020-01-07 | 广东韶钢松山股份有限公司 | Online repairing method for converter body perforation |
| CN110653450B (en) * | 2019-08-01 | 2021-06-25 | 广东韶钢松山股份有限公司 | Online repairing method for converter body perforation |
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| Publication number | Publication date |
|---|---|
| CN101380674B (en) | 2011-03-23 |
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