CN104399959A - Masonry construction capable of increasing service cycle of bottom of steel ladle - Google Patents
Masonry construction capable of increasing service cycle of bottom of steel ladle Download PDFInfo
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- CN104399959A CN104399959A CN201410712491.2A CN201410712491A CN104399959A CN 104399959 A CN104399959 A CN 104399959A CN 201410712491 A CN201410712491 A CN 201410712491A CN 104399959 A CN104399959 A CN 104399959A
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- thickness
- ladle
- ladle bottom
- impact zone
- steel ladle
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- 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
- B22D41/02—Linings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a steel ladle bottom structure capable of increasing the service cycle of the steel ladle. The steel ladle bottom structure is composed of an impact region, a transition region, a non-impact region, and a water outlet of the non-impact region, wherein the various regions of the bottom are constructed by use of magnesia-carbon bricks; the magnesia-carbon bricks different in thickness specification are applied to the impact region, the transition region and the non-impact region, in other words, the impact region is constructed with the thickness of not less than 280mm are applied to the impact region, while the non-impact region is constructed with the thickness of not less than 150mm, and the transition region is constructed with the thickness between the thickness of the impact region and that of the non-impact region; a castable protective layer is poured on the steel ladle bottom formed by use of the magnesia-carbon bricks different in thickness specification and a smooth slope is formed with the water outlet as the lowest point. According to the steel ladle bottom structure capable of increasing the service cycle of the steel ladle, the magnesia-carbon bricks different in thickness are laid in different regions of the steel ladle bottom and the castable protective layer is added so that the steel ladle bottom can be enabled to serve as long as a wrapping wall; the magnesia-carbon bricks are securely connected with the castable protective layer so that the safety of the steel ladle in operation can be improved; besides, liquid steel can be completely poured out and then the protective material is poured, and consequently, the safety accident of steel leakage due to serious erosion of the bottom bricks is eliminated.
Description
Technical field
The present invention relates to a kind of steelmaking equipment, belong to steel-making ladle particularly, definitely for the ladle bottom masonry construction of ladle life cycle can be improved.
Background technology
Have carbon ladle bottom, wall portion to build by laying bricks or stones by magnesia carbon brick to form.Because the factors such as molten steel when bottom brick is tapped washes away strongly exist, environment for use comparatively bag nogging is more severe, often causing because bottom brick etch is serious, being forced to premature removal to making ladle under normal circumstances at nogging.At present, the brick shape that the magnesia carbon brick that ladle bottom uses all adopts thickness specification to be 300mm, and its bottom surface is flat type.In actual use, when namely tapping, steel stream, slag directly can impact FX and the impact zone of ladle bottom, therefore, magnesia carbon brick in this regional extent is due to by steel stream, strongly the washing away of slag, etch, its etch rates is significantly higher than other position of ladle bottom, i.e. transition region and non-percussion district.When the magnesia carbon brick etch of impact zone is serious, as found not in time, the major accident of ladle bottom bleed-out can be caused, have a strong impact on production, and damage equipment; As found in time, ladle can only be forced to remove overhaul, occur that Ladle Bottom brick can not reach the requirement synchronous with the nogging life-span, namely ladle bottom life cycle is on average just scrapped at about 60 times, and the life cycle of steel ladle is defined in 110 times, therefore Ladle Bottom is once etch is serious, must scrap and change by overall ladle, causing ladle lining cost increase; The magnesia carbon brick separately used due to ladle bottom surface is same gauge brick, non-percussion district brick environment for use is better, and the residual brick thickness after ladle overhaul is all at more than 200mm, and security surplus capacity is bigger than normal, through technological improvement, can suitably reduce ladle lining consumption; Meanwhile, because ladle bottom surface is flat type, at the end of each cast steel, ladle bottom always has residue molten steel to retain, and causes waste, have impact on steel technology index, add ton steel cost.
Through retrieval, China Patent Publication No. is the document of CN201702360U, it discloses " a kind of is the ladle at the bottom of slope shape bag ", main description ladle bottom castable forms slope, when being convenient to cast steel, molten steel waters to the greatest extent, but there is ladle bottom brick and castable layering, in conjunction with untight problem, during cast steel, castable is easily peeled off, ladle bottom brick can not be solved and reach synchronous result with bag nogging life cycle; Chinese Patent Application No. is the document of CN200710052576, it discloses " a kind of ladle bottom construction method ", main description ladle bottom impact zone uses piling brick to add castable again, invented the installation method of ventilative cover brick simultaneously, but only there is subrange in piling brick, there is ladle bottom brick and castable layering, in conjunction with untight problem, during cast steel, castable is easily peeled off, ladle bottom brick can not be solved and reach synchronous result with bag nogging life cycle.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, there is provided that a kind of can to realize ladle bottom synchronous with the life cycle of bag wall refractory brick, the cast number of times of 110 times can be realized, and polycrystalline substance is reasonable, molten steel is poured out totally, maintain easily, eliminate the ladle bottom masonry construction that can improve ladle life cycle of the bleed-out security incident caused because bottom brick etch is serious.
Realize the measure of above-mentioned purpose:
A kind of ladle bottom structure that can improve ladle life cycle, be made up of impact zone, transition region, non-percussion district, the delivery port in non-percussion district, each district, bottom magnesia carbon brick, it is: at the magnesia carbon brick of impact zone, transition region, non-percussion district employing different-thickness specification, namely impact zone employing thickness is not thinner than 280mm specification, non-percussion district adopts thickness to adopt thickness not to be thinner than 150mm specification, and transition region adopts thickness specification between impact zone and non-percussion district; The ladle bottom surface casting formed at the magnesia carbon brick of different-thickness specification has castable protective layer, and with the mouth of a river of tapping for minimum point is formed level and smooth domatic.
It is: the castable protective layer of ladle bottom surface casting is not less than 10mm at the thickness on the magnesia carbon brick layer surface of impact zone.
It is: the magnesia carbon brick thickness difference between impact zone and non-percussion district is within the scope of 60 ~ 140mm.
It is: requiring with refractory matter physical and chemical index of described castable protective layer: Al
2o
3>=90%, through the baking of 3 hours at 1500 DEG C, its rupture strength>=12Mpa, and reheating linear change rate on reheating is ± 0.5 %, toasts bulk density>=3.1 g/cm of 24 hours at 110 DEG C
3corundum material.
The present invention compared with prior art, the magnesia carbon brick of different-thickness has been built by laying bricks or stones just because of the zones of different at ladle bottom, and it is reasonable in design, increase castable protective layer simultaneously, with impact zone magnesia carbon brick at the bottom of further protection package, make it reach the requirement synchronous with the bag wall magnesia carbon brick life-span, the cast number of times of 110 times can be realized; And make the connection of magnesia carbon brick and castable protective layer firm, improve the security of ladle running; And polycrystalline substance is reasonable, is poured out by molten steel totally; And be convenient to safeguard, during ladle light maintenance, according to the actual conditions of bag end etch, again can pour into a mould preservative, eliminate the bleed-out security incident caused because bottom brick etch is serious; Separately due to the brick shape of different parts different-thickness, brickmaking materials are obviously reduced, and ladle lining consumption can be made to reduce, and production cost reduces relatively.
Accompanying drawing explanation
Fig. 1 is the structural representation of ladle bottom of the present invention;
Fig. 2 is the longitudinal cross-section structural representation of Fig. 1;
In Fig. 1,2: 1-impact zone, 2-transition region, 3-non-percussion district, 4-tapping mouth of a river, 5-castable protective layer.
Detailed description of the invention
Below the present invention is described in detail:
Embodiment 1
A kind of ladle bottom structure that can improve ladle life cycle, be made up of impact zone 1, transition region 2, non-percussion district 3, tapping hole 4, it adopts the magnesia carbon brick of different-thickness specification in impact zone 1, transition region 2, non-percussion district 3, namely impact zone 1 adopts thickness to be 300mm specification, non-percussion district 3 adopts thickness to be 180mm specification, and transition region 2 adopts thickness to be 240mm specification; The ladle bottom surface casting formed at the magnesia carbon brick of different-thickness specification has castable protective layer 5, and with tapping hole 4 for minimum point is formed level and smooth domatic; Castable protective layer 5 is 10mm at the thickness on the magnesia carbon brick layer surface of impact zone 1.
The use castable physical and chemical index of described castable protective layer 5 is: Al
2o
3be 90%, through the baking of 3 hours at 1500 DEG C, its rupture strength is 12Mpa, and reheating linear change rate on reheating is 0.45 %, and the bulk density of toasting 24 hours at 110 DEG C is 3.1 g/cm
3corundum material.
After 50 times on probation; find impact zone 1 place refractory protection 5 some is hit and damaged when light maintenance; continue to use through again pouring into a mould after refractory protection 5 is repaired; reach the effect that ladle bottom brick is synchronous with bag nogging life cycle, the entirety of namely carrying out after the cast number of times of 110 times scraps replacing.
Embodiment 2
A kind of ladle bottom structure that can improve ladle life cycle, be made up of impact zone 1, transition region 2, non-percussion district 3, tapping hole 4, it adopts the magnesia carbon brick of different-thickness specification in impact zone 1, transition region 2, non-percussion district 3, namely impact zone 1 adopts thickness to be 280mm specification, non-percussion district 3 adopts thickness to be 150mm specification, and transition region 2 adopts thickness to be 215mm specification; The ladle bottom surface casting formed at the magnesia carbon brick of different-thickness specification has castable protective layer 5, and with tapping hole 4 for minimum point is formed level and smooth domatic; Castable protective layer 5 is 12mm at the thickness on the magnesia carbon brick layer surface of impact zone 1.
The use castable physical and chemical index of described castable protective layer 5 is: Al
2o
3be 90%, through the baking of 3 hours at 1500 DEG C, its rupture strength is 12Mpa, and reheating linear change rate on reheating is 0.23 %, and the bulk density of toasting 24 hours at 110 DEG C is 3.21 g/cm
3corundum material.
After 55 times on probation; find impact zone 2 place refractory protection 5 some is hit and damaged when light maintenance; continue to use through again pouring into a mould after refractory protection 5 is repaired; reach the effect that ladle bottom brick is synchronous with bag nogging life cycle, the entirety of namely carrying out after the cast number of times of 110 times scraps replacing.
Embodiment 3
A kind of ladle bottom structure that can improve ladle life cycle, be made up of impact zone 1, transition region 2, non-percussion district 3, tapping hole 4, it adopts the magnesia carbon brick of different-thickness specification in impact zone 1, transition region 2, non-percussion district 3, namely impact zone 1 adopts thickness to be 350mm specification, non-percussion district 3 adopts thickness to be 280mm specification, and transition region 2 adopts thickness to be 315mm specification; The ladle bottom surface casting formed at the magnesia carbon brick of different-thickness specification has castable protective layer 5, and with tapping hole 4 for minimum point is formed level and smooth domatic; Castable protective layer 5 is 14mm at the thickness on the magnesia carbon brick layer surface of impact zone 1.
The use castable physical and chemical index of described castable protective layer 5 is: Al
2o
3be 90%, through the baking of 3 hours at 1500 DEG C, its rupture strength is 12Mpa, and reheating linear change rate on reheating is 0.15 %, and the bulk density of toasting 24 hours at 110 DEG C is 3.36 g/cm
3corundum material.
After 50 times on probation; find impact zone 1 place refractory protection 5 some is hit and damaged when light maintenance; continue to use through again pouring into a mould after refractory protection 5 is repaired; reach the effect that ladle bottom brick is synchronous with bag nogging life cycle, the entirety of namely carrying out after the cast number of times of 110 times scraps replacing.
Embodiment 4
A kind of ladle bottom structure that can improve ladle life cycle, be made up of impact zone 1, transition region 2, non-percussion district 3, tapping hole 4, it adopts the magnesia carbon brick of different-thickness specification in impact zone 1, transition region 2, non-percussion district 3, namely impact zone 1 adopts thickness to be 320mm specification, non-percussion district 3 adopts thickness to be 240mm specification, and transition region 2 adopts thickness to be 280mm specification; The ladle bottom surface casting formed at the magnesia carbon brick of different-thickness specification has castable protective layer 5, and with tapping hole 4 for minimum point is formed level and smooth domatic; Castable protective layer 5 is 12mm at the thickness on the magnesia carbon brick layer surface of impact zone 1.
The use castable physical and chemical index of described castable protective layer 5 is: Al
2o
3be 90%, through the baking of 3 hours at 1500 DEG C, its rupture strength is 12Mpa, and reheating linear change rate on reheating is 0.12 %, and the bulk density of toasting 24 hours at 110 DEG C is 3.35 g/cm
3corundum material.
After 55 times on probation; find impact zone 1 place refractory protection 5 some is hit and damaged when light maintenance; continue to use through again pouring into a mould after refractory protection 5 is repaired; reach the effect that ladle bottom brick is synchronous with bag nogging life cycle, the entirety of namely carrying out after the cast number of times of 110 times scraps replacing.
Embodiment 5
A kind of ladle bottom structure that can improve ladle life cycle, be made up of impact zone 1, transition region 2, non-percussion district 3, tapping hole 4, it adopts the magnesia carbon brick of different-thickness specification in impact zone 1, transition region 2, non-percussion district 3, namely impact zone 1 adopts thickness to be 320mm specification, non-percussion district 3 adopts thickness to be 220mm specification, and transition region 2 adopts thickness to be 270mm specification; The ladle bottom surface casting formed at the magnesia carbon brick of different-thickness specification has castable protective layer 5, and with tapping hole 4 for minimum point is formed level and smooth domatic; Castable protective layer 5 is 11mm at the thickness on the magnesia carbon brick layer surface of impact zone 1.
The use castable physical and chemical index of described castable protective layer 5 is: Al
2o
3be 90%, through the baking of 3 hours at 1500 DEG C, its rupture strength is 12Mpa, and reheating linear change rate on reheating is 0.1 %, and the bulk density of toasting 24 hours at 110 DEG C is 3.3 g/cm
3corundum material.
After 53 times on probation; find impact zone 2 place refractory protection 5 some is hit and damaged when light maintenance; continue to use through again pouring into a mould after refractory protection 5 is repaired; reach the effect that ladle bottom brick is synchronous with bag nogging life cycle, the entirety of namely carrying out after the cast number of times of 110 times scraps replacing.
Above-described embodiment is only the best and exemplifies, and is not the restriction to embodiments of the present invention.
Claims (4)
1. one kind can be improved the ladle bottom structure of ladle life cycle, be made up of impact zone, transition region, non-percussion district, the delivery port in non-percussion district, each district, bottom magnesia carbon brick, it is characterized in that: at the magnesia carbon brick of impact zone, transition region, non-percussion district employing different-thickness specification, namely impact zone employing thickness is not thinner than 280mm specification, non-percussion district adopts thickness to adopt thickness not to be thinner than 150mm specification, and transition region adopts thickness specification between impact zone and non-percussion district; The ladle bottom surface casting formed at the magnesia carbon brick of different-thickness specification has castable protective layer, and with the mouth of a river of tapping for minimum point is formed level and smooth domatic.
2. a kind of ladle bottom structure that can improve ladle life cycle as claimed in claim 1, is characterized in that: the castable protective layer of ladle bottom surface casting is not less than 10mm at the thickness on the magnesia carbon brick layer surface of impact zone.
3. a kind of ladle bottom structure that can improve ladle life cycle as claimed in claim 1, is characterized in that: the magnesia carbon brick thickness difference between impact zone and non-percussion district is within the scope of 60 ~ 140mm.
4. a kind of ladle bottom structure that can improve ladle life cycle as claimed in claim 1 or 2, is characterized in that: requiring with refractory matter physical and chemical index of described castable protective layer: Al
2o
3>=90%, through the baking of 3 hours at 1500 DEG C, its rupture strength>=12Mpa, and reheating linear change rate on reheating is ± 0.5 %, toasts bulk density>=3.1 g/cm of 24 hours at 110 DEG C
3corundum material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712491.2A CN104399959B (en) | 2014-12-02 | 2014-12-02 | A kind of masonry construction that can improve ladle bottom life cycle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712491.2A CN104399959B (en) | 2014-12-02 | 2014-12-02 | A kind of masonry construction that can improve ladle bottom life cycle |
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| Publication Number | Publication Date |
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| CN104399959A true CN104399959A (en) | 2015-03-11 |
| CN104399959B CN104399959B (en) | 2016-07-06 |
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| CN201410712491.2A Active CN104399959B (en) | 2014-12-02 | 2014-12-02 | A kind of masonry construction that can improve ladle bottom life cycle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107116208A (en) * | 2017-04-11 | 2017-09-01 | 营口辰兴耐火材料有限公司 | A kind of building method of ladle composite fire liner |
| CN110449568A (en) * | 2019-08-27 | 2019-11-15 | 北京利尔高温材料股份有限公司 | A kind of compound packet bottom construction technology of ladle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03238162A (en) * | 1990-02-14 | 1991-10-23 | Kobe Steel Ltd | Method for lining and repairting molten steel ladle |
| US20040108637A1 (en) * | 2001-04-13 | 2004-06-10 | North American Refractories Co. | Refractory lining for metallurgical vessel |
| CN202199765U (en) * | 2011-08-25 | 2012-04-25 | 武汉钢铁集团精鼎工业炉有限责任公司 | Novel ladle bottom liner structure |
| CN103433472A (en) * | 2013-08-09 | 2013-12-11 | 黑龙江建龙钢铁有限公司 | Expansion ladle |
| CN203401074U (en) * | 2013-08-28 | 2014-01-22 | 武汉钢铁集团精鼎工业炉有限责任公司 | Thermal state repairing device for steel ladle ventilating brick cup |
| CN203401073U (en) * | 2013-08-16 | 2014-01-22 | 武汉钢铁集团精鼎工业炉有限责任公司 | Steel ladle bottom-covering work layer masonry construction |
-
2014
- 2014-12-02 CN CN201410712491.2A patent/CN104399959B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03238162A (en) * | 1990-02-14 | 1991-10-23 | Kobe Steel Ltd | Method for lining and repairting molten steel ladle |
| US20040108637A1 (en) * | 2001-04-13 | 2004-06-10 | North American Refractories Co. | Refractory lining for metallurgical vessel |
| CN202199765U (en) * | 2011-08-25 | 2012-04-25 | 武汉钢铁集团精鼎工业炉有限责任公司 | Novel ladle bottom liner structure |
| CN103433472A (en) * | 2013-08-09 | 2013-12-11 | 黑龙江建龙钢铁有限公司 | Expansion ladle |
| CN203401073U (en) * | 2013-08-16 | 2014-01-22 | 武汉钢铁集团精鼎工业炉有限责任公司 | Steel ladle bottom-covering work layer masonry construction |
| CN203401074U (en) * | 2013-08-28 | 2014-01-22 | 武汉钢铁集团精鼎工业炉有限责任公司 | Thermal state repairing device for steel ladle ventilating brick cup |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107116208A (en) * | 2017-04-11 | 2017-09-01 | 营口辰兴耐火材料有限公司 | A kind of building method of ladle composite fire liner |
| CN110449568A (en) * | 2019-08-27 | 2019-11-15 | 北京利尔高温材料股份有限公司 | A kind of compound packet bottom construction technology of ladle |
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| Publication number | Publication date |
|---|---|
| CN104399959B (en) | 2016-07-06 |
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Effective date of registration: 20180115 Address after: 430083 Qingshan District, Hubei, Wuhan factory before the door No. 2 Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: Wuhan Iron & Steel (Group) Corp. |
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