CN201832967U - Slag weir made of composite material for continuous casting tundish - Google Patents
Slag weir made of composite material for continuous casting tundish Download PDFInfo
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- CN201832967U CN201832967U CN2010202095944U CN201020209594U CN201832967U CN 201832967 U CN201832967 U CN 201832967U CN 2010202095944 U CN2010202095944 U CN 2010202095944U CN 201020209594 U CN201020209594 U CN 201020209594U CN 201832967 U CN201832967 U CN 201832967U
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Abstract
The utility model relates to a slag weir made of a composite material and used for a continuous casting tundish. The longitudinal section of the slag weir is trapezoid-shaped. The slag weir consists of a slag weir body and two lifting lugs (3), wherein the two lifting lugs (3) are positioned at a position about 1/4 length on the left and the right sides of the upper part of the slag weir body respectively, the slag weir body consists of a slag weir lower part (1) and a slag weir upper part (2), the slag weir lower part (1) and the slag weir upper part (2) are formed by composite casting of different casting materials, and the thickness (m) of the slag weir ranges from 150 to 180 mm. The utility model also provides a manufacturing method and an installation process. The utility model prolongs the service life of the slag weir, improves the flow control and the slag-stopping effect of the whole continuous casting process, and avoids the fluctuation of quality of the casting blank during the late stage of application of the continuous casting tundish, so as to further improve the qualification rate of the continuous casting blank.
Description
Technical field
The utility model relates to a kind of continuous casting tundish slag blocking wall and preparation technology of composite, belongs to optimisation technique field, Ferrous Metallurgy continuous casting tundish flow field.
Background technology
At present, domestic many steel mills are in order to improve the flow field of molten steel in the continuous casting tundish, prolong the time of staying of molten steel in tundish, promote floating foreign and discharge, in the continuous casting tundish, flow control device is set, generally be used in combination, and the top of the bottom of slag blocking wall and dam to partly interlock, to reach better flow control effect by the slag blocking wall on top and the dam of bottom.Slag blocking wall, dam mainly adopt magnesia preform structure at present, the major defect that exists is, slag blocking wall is anti-erosion and washing away not, service life is low, general 6～8 hours, and along with aggravation is corroded in the bottom of slag blocking wall, lose the effect of control stream gradually, become the restriction continuous casting tundish bottleneck problem in service life.For the not anti-erosion that solves slag blocking wall with wash away problem, prior art has been taked the slag blocking wall of band steel outlet hole, still exist not enough: steel stream directly passes through from the steel outlet hole of slag blocking wall, rather than passes through from the staggered space of slag blocking wall and dam, and it promotes the effect reduction of inclusion floating; When simultaneously steel stream is by slag blocking wall, concentrate on steel outlet hole, aggravated the erosion of steel outlet hole and wash away, be restricted its service life, was generally 8～10 hours, not from dealing with problems in essence.
Summary of the invention
Utility model purpose of the present utility model is, problem at existing slag blocking wall technology existence, a kind of tundish slag blocking wall and preparation technology of composite are provided, this slag blocking wall has improved the control stream and the pushing off the slag effect of the continuous casting overall process of slag blocking wall, significantly improved the service life of slag blocking wall, reached more than 14 hours.The single Bao Lian that has improved tundish thus waters the stove number, has reduced the continuous casting production cost.
A kind of continuous casting tundish slag blocking wall of composite, its vertical section is trapezoidal, body and hanger by slag blocking wall are formed, two hangers are positioned at each 1/4 place about the body top of slag blocking wall, the body of slag blocking wall is made up of the bottom of slag blocking wall and the top of slag blocking wall, the bottom of slag blocking wall and the top of slag blocking wall are formed by the material feeding composite casting that waters of unlike material respectively, and the thickness m of slag blocking wall is 150～180mm.
Preferably, the continuous casting tundish slag blocking wall of described composite, its principal character is, and slag blocking wall adopts prefabricated component, and the bottom of slag blocking wall is formed by the corundum pouring material cast, and height h is 100～200mm, the top of slag blocking wall is watered the material feeding cast and is formed by magnesia.
The described corundum pouring material that is used for the continuous casting tundish slag blocking wall bottom of composite, form by following material by weight percentage: the fused white corundum 28～32% of 8～5mm granularity, the fused white corundum 10～14% of 3mm≤granularity＜5mm, the fused white corundum 14～18% of 1mm≤granularity＜3mm, 0.083mm the plate diamond spar 12～16% of＜granularity＜1mm, 180 purpose plate diamond spar fine powders 3.5～4.5%, 325 purpose plate diamond spar differential 5.0～6.0%, 325 purpose spinelle differential 2.5～3.5%, the aluminium oxide differential 3.5～5.0% of 325 purposes, silicon powder 0.5～1.5%, pure calcium aluminate cement 3.5～4.5%, 200 purpose fused magnesite fine powders 4.5～5.5%, sodium phosphate trimer 0.1～0.2%, explosion-proof fiber 0.03～0.05% all is weight percentage.
The preferred trade mark of pure calcium aluminate cement is the pure calcium aluminate cement of CA74.Described silicon powder, SiO
2Content 〉=92%, granularity is less than 5 μ m, and granularity accounts for 80～85% less than 2 μ m.
Preferably, the described corundum pouring material that is used for the continuous casting tundish slag blocking wall bottom of composite, form by following material by weight percentage: the fused white corundum 30% of 8～5mm granularity, the fused white corundum 12% of 3mm≤granularity＜5mm, the fused white corundum 16% of 1mm≤granularity＜3mm, 0.083mm the plate diamond spar 15% of＜granularity＜1mm, 180 purpose plate diamond spar fine powders 4.0%, 325 purpose plate diamond spar differential 6.0%, 325 purpose spinelle differential 3.0%, 325 purpose aluminium oxide differential 4.0%, silicon powder 1.0%, the trade mark are the pure calcium aluminate cement 4.0% of CA74,200 purpose fused magnesite fine powders 4.8%, sodium phosphate trimer 0.15%, explosion-proof fiber 0.05% all is weight percentage.
The described continuous casting tundish slag blocking wall top that is used for composite magnesia watered material feeding, form by following material by weight percentage: the highly-purity magnesite 20～24% of 8～5mm granularity, the highly-purity magnesite 10～15% of 3mm≤granularity＜5mm granularity, the highly-purity magnesite 14～18% of 1mm≤granularity＜3mm, 0.083mm the fused magnesite 18～21% of＜granularity＜1mm, 180 purpose fused magnesite fine powders 20～24%, silicon powder 3.0～4.5%, 325 purpose aluminum-spinel micro mists 3.0～5.0%, sodium phosphate trimer 0.2～0.5%, calgon 0.15～0.25%, explosion-proof fiber 0.08～0.15%, fire-resistant steel fibre 0.3～0.5% all is weight percentage.
Described silicon powder, SiO
2Content 〉=92%, granularity is less than 5 μ m, and granularity accounts for 80～85% less than 2 μ m.
Preferably, the described continuous casting tundish slag blocking wall top that is used for composite magnesia watered material feeding, form by following material by weight percentage: the highly-purity magnesite 22% of 8～5mm granularity, the highly-purity magnesite 12% of 3mm≤granularity＜5mm, the highly-purity magnesite 16% of＜1mm≤granularity＜3mm, 0.083mm the fused magnesite 19% of＜granularity＜1mm granularity, 180 purpose fused magnesite fine powders 22.4%, silicon powder 3.5%, 325 purpose aluminum-spinel micro mist 4.0%, sodium phosphate trimer 0.3%, calgon 0.2%, explosion-proof fiber 0.1%, fire-resistant steel fibre 0.5% all is weight percentage.
The utility model also provide described composite continuous casting tundish slag blocking wall the preparation method, comprise the following steps:
1) the first corundum pouring material of cast slag blocking wall bottom after the component material weighing with the corundum pouring material of described slag blocking wall, adds to do in the batch mixer and mixed 2～3 minutes, adds the water of material gross weight 4.5～5.5%, wet mixing 4～6 minutes, mixing;
2) corundum pouring material that mixes is put into loose tool, disposable reinforced thickness is no more than 150 millimeters, the limit vibrating head vibration moulding of feeding in raw material of this back;
That 3) pours into a mould slag blocking wall top (2) then magnesialy waters material feeding, described slag blocking wall magnesia watered the component material weighing of material feeding after, add to do in the batch mixer and mixed 2～3 minutes, add the water of material gross weight 5.5～6.0%, wet mixing 4～6 minutes, mixing;
What 4) will mix magnesialy waters material feeding and puts into the loose tool of pouring into a mould corundum pouring material, disposable reinforced thickness is no more than 150 millimeters, the limit vibrating head vibration moulding of feeding in raw material of this back, when no big bubble was emerged, the green compact of the slag blocking wall prefabricated component of composite were finished;
5) maintenance 1～2 day under 0～30 ℃ environment temperature;
6) baking and cooling, be divided into the next stage: heat up from 0～120 ℃ with 10 ℃/h programming rate (1), is warming up to 120～150 ℃; (2) at 120～150 ℃ of insulations, temperature retention time 12h; (3) heat up from 120～150 ℃ with 10 ℃/h programming rate again, be warming up to 250～300 ℃; (4) heat up from 250～300 ℃ with 15 ℃/h programming rate again, be warming up to 400～450 ℃, (5) truce is cooled off naturally, cool time 12～24h, the slag blocking wall of composite completes.
Preferably, step 5) maintenance 1～2 day under 15～25 ℃ of environment temperatures;
The mounting process of the continuous casting tundish slag blocking wall of described composite: pass through hanger, with driving lifting slag blocking wall, the bottom of slag blocking wall is 150～200mm to the working face distance C of tundish underwrite lining work, the slag blocking wall top is 30～50mm to the distance b on tundish bag edge, and the degree of depth a that two sides of slag blocking wall are imbedded the tundish underwrite lining work is 20～50mm.Reality is smeared with magnesia coating in gap between slag blocking wall and the tundish working lining, and slag blocking wall installs.
The beneficial effects of the utility model are:
1) the continuous casting tundish slag blocking wall of the composite high temperature that can bear high-temperature molten steel (1550～1650 ℃) washes away, good erosion resisting and thermal shock resistance are arranged, reach service life more than 14 hours, the single Bao Lian that has improved tundish thus waters the stove number, has reduced the continuous casting production cost.
2) the continuous casting tundish slag blocking wall of composite, anti-erosion, the scour resistance of slag blocking wall bottom have been improved, improve the control stream and the pushing off the slag effect of the continuous casting overall process of slag blocking wall, avoided the continuous casting tundish to use the slab quality fluctuation in later stage, further improved the continuous casting billet qualification rate.
The utility model is successful Application on the generous slab conticaster of Laiwu iron and steel group silver mountain shaped steel Co., Ltd steel mill single current tundish, two stream cut deal conticaster tundish, the continuous casting tundish slag blocking wall of composite was brought up to 14～16 hours by 6～8 hours service life, the control stream and the pushing off the slag effect of the continuous casting overall process of slag blocking wall have been improved simultaneously, avoided the continuous casting tundish to use the slab quality fluctuation in later stage, further improved the continuous casting billet qualification rate, reached more than 99.6%.
Description of drawings
Fig. 1 is the slag blocking wall structural representation of composite of the present utility model, the slag blocking wall front view,
Fig. 2 is the slag blocking wall structural representation of composite of the present utility model, the slag blocking wall sectional side view.
Fig. 3 is the mounting process schematic diagram of the slag blocking wall of the utility model composite.
Among the figure: 1-corundum matter slag blocking wall bottom; The magnesia slag blocking wall of 2-top; The 3-hanger; 4-tundish working lining; 5-tundish permanent liner.
The specific embodiment
Following examples are that the preparation technology to utility model further specifies, but the utility model is not limited thereto.
Embodiment 1:
As Fig. 1, Fig. 2, shown in Figure 3, the continuous casting tundish slag blocking wall of composite, its vertical section is trapezoidal, body and hanger 3 by slag blocking wall are formed, two hangers 3 are positioned at each 1/4 place about the body top of slag blocking wall, the body of slag blocking wall is by the bottom 1 of slag blocking wall and the top 2 of slag blocking wall, and the material feeding composite casting that waters by unlike material forms respectively, and the thickness m of slag blocking wall is 150mm.Slag blocking wall adopts prefabricated component, and the bottom 1 of slag blocking wall is formed by the corundum pouring material cast, and height h is 100mm, and the top 2 of slag blocking wall is watered the material feeding cast and formed by magnesia.
The described corundum pouring material that is used for the continuous casting tundish slag blocking wall bottom 1 of composite, form by following material by weight percentage: the fused white corundum 30% of 8～5mm granularity, the fused white corundum 12% of＜5～3mm granularity, the fused white corundum 16% of＜3～1mm granularity,＜1～＞plate diamond spar 15% of 0.083mm granularity, 180 purpose plate diamond spar fine powders 4.0%, 325 purpose plate diamond spar differential 6.0%, 325 purpose spinelle differential 3.0%, 325 purpose aluminium oxide differential 4.0%, silicon powder 1.0%, the trade mark is pure calcium aluminate cement 4.0%, the 200 purpose fused magnesite fine powder 4.8% of CA74, sodium phosphate trimer 0.15%, explosion-proof fiber 0.05% all is weight percentage.
The described continuous casting tundish slag blocking wall top 2 that is used for composite magnesia watered material feeding, form by following material by weight percentage: the highly-purity magnesite 22% of 8～5mm granularity, the highly-purity magnesite 12% of＜5～3mm granularity, the highly-purity magnesite 16% of＜3～1mm granularity,＜1～＞fused magnesite 19% of 0.083mm granularity, 180 purpose fused magnesite fine powders 22.4%, silicon powder 3.5%, 325 purpose aluminum-spinel micro mists 4.0%, sodium phosphate trimer 0.3%, calgon 0.2%, explosion-proof fiber 0.1%, fire-resistant steel fibre 0.5% all is weight percentage.
Described silicon powder, SiO
2Content 〉=92%, granularity is less than 5 μ m, and granularity accounts for 80～85% less than 2 μ m.
The continuous casting tundish slag blocking wall of described composite the preparation method, comprise the following steps:
1) the first corundum pouring material of cast slag blocking wall bottom 1 after the component material weighing with the corundum pouring material of described slag blocking wall, adds to do in the batch mixer and mixed 2～3 minutes, adds the water of material gross weight 5.0%, wet mixing 4～6 minutes, mixing;
2) corundum pouring material that mixes is put into loose tool, disposable reinforced thickness should not surpass 150 millimeters, after this answers and uses vibrating head vibration moulding while feeding in raw material;
That 3) pours into a mould slag blocking wall top 2 then magnesialy waters material feeding, described slag blocking wall magnesia watered the component material weighing of material feeding after, add to do in the batch mixer and mixed 2～3 minutes, add the water of material gross weight 5.5%, wet mixing 4～6 minutes, mixing;
What 4) will mix magnesialy waters material feeding and puts into the loose tool of pouring into a mould corundum pouring material, disposable reinforced thickness should be above 150 millimeters, after this answer while feeding in raw material and use vibrating head vibration moulding, when no big bubble was emerged, the green compact of the slag blocking wall prefabricated component of composite were finished;
5) maintenance 1 day under 15～25 ℃ of environment temperatures;
6) baking and cooling, be divided into the next stage: heat up from 10～120 ℃ with 10 ℃/h programming rate (1), is warming up to 120 ℃; (2) at 120 ℃ of insulations, time 12h; (3) heat up from 120 ℃ with 10 ℃/h programming rate again, be warming up to 250 ℃; (4) heat up from 250～300 ℃ with 15 ℃/h programming rate again, be warming up to 400 ℃, (5) truce is cooled off naturally, time 24h, and the slag blocking wall of composite completes.
The mounting process of the continuous casting tundish slag blocking wall of described composite: by hanger 3, with driving lifting slag blocking wall, the bottom of slag blocking wall is 150mm to the working face distance C of tundish underwrite lining work 4, the slag blocking wall top is 30mm to the distance b on tundish bag edge, and the degree of depth a that two sides of slag blocking wall are imbedded the tundish underwrite lining work is 20mm.Reality is smeared with magnesia coating in gap between slag blocking wall and the tundish working lining 4, and slag blocking wall installs.
Embodiment 2:
Other are with embodiment 1, and difference is:
The thickness m of slag blocking wall is 180mm, and the height h of bottom 1 corundum pouring material of slag blocking wall is 200mm.
The described corundum pouring material that is used for the continuous casting tundish slag blocking wall bottom 1 of composite, form by following material by weight percentage: the fused white corundum 30% of 8～5mm granularity, the fused white corundum 14% of＜5～3mm granularity, the fused white corundum 14% of＜3～1mm granularity,＜1～＞plate diamond spar 16% of 0.083mm granularity, 180 purpose plate diamond spar fine powders 3.5%, 325 purpose plate diamond spar differential 5.5%, 325 purpose spinelle differential 3.5%, 325 purpose aluminium oxide differential 3.5%, silicon powder 1.0%, the trade mark is pure calcium aluminate cement 4.0%, the 200 purpose fused magnesite fine powder 4.8% of CA74, sodium phosphate trimer 0.15%, explosion-proof fiber 0.05% all is weight percentage.
The described continuous casting tundish slag blocking wall top 2 that is used for composite magnesia watered material feeding, form by following material by weight percentage: the highly-purity magnesite 20% of 8～5mm granularity, the highly-purity magnesite 14% of＜5～3mm granularity, the highly-purity magnesite 16% of＜3～1mm granularity,＜1～＞fused magnesite 18% of 0.083mm granularity, 180 purpose fused magnesite fine powders 23.4%, silicon powder 3.5%, 325 purpose aluminum-spinel micro mists 4.0%, sodium phosphate trimer 0.3%, calgon 0.2%, explosion-proof fiber 0.1%, fire-resistant steel fibre 0.5% all is weight percentage.
The mounting process of the continuous casting tundish slag blocking wall of described composite: by hanger 3, with driving lifting slag blocking wall, the bottom of slag blocking wall is 200mm to the working face distance C of tundish underwrite lining work 4, the slag blocking wall top is 50mm to the distance b on tundish bag edge, and the degree of depth a that two sides of slag blocking wall are imbedded the tundish underwrite lining work is 50mm.
Claims (2)
1. the continuous casting tundish slag blocking wall of a composite, its vertical section is trapezoidal, body and hanger (3) by slag blocking wall are formed, two hangers (3) are positioned at each 1/4 place about the body top of slag blocking wall, the body of slag blocking wall is made up of the bottom (1) of slag blocking wall and the top (2) of slag blocking wall, the top (2) of bottom of slag blocking wall (1) and slag blocking wall is formed by the material feeding composite casting that waters of unlike material respectively, and the thickness of slag blocking wall (m) is 150～180mm.
2. the continuous casting tundish slag blocking wall of composite as claimed in claim 1, it is characterized in that slag blocking wall adopts prefabricated component, the bottom of slag blocking wall (1) is formed by the corundum pouring material cast, highly (h) is 100～200mm, and the top of slag blocking wall (2) are watered material feeding cast and formed by magnesia.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202095944U CN201832967U (en) | 2010-05-31 | 2010-05-31 | Slag weir made of composite material for continuous casting tundish |
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| CN2010202095944U CN201832967U (en) | 2010-05-31 | 2010-05-31 | Slag weir made of composite material for continuous casting tundish |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101869970A (en) * | 2010-05-31 | 2010-10-27 | 莱芜钢铁集团有限公司 | Continuous casting tundish slag blocking wall of composite material and production technology |
| CN102775158A (en) * | 2012-07-09 | 2012-11-14 | 郑州东方安彩耐火材料有限公司 | Ramming furnace cover of corundum electric arc furnace and production process of ramming furnace cover |
| CN103100676A (en) * | 2013-01-01 | 2013-05-15 | 北京利尔高温材料股份有限公司 | Continuous casting tundish current stabilizer and preparation method thereof |
| CN103736984A (en) * | 2014-01-11 | 2014-04-23 | 莱芜钢铁集团有限公司 | Hot-metal bottle slag stopper with hot metal flowing port and manufacturing method thereof |
| CN110885245A (en) * | 2019-12-04 | 2020-03-17 | 山东国茂冶金材料有限公司 | High-temperature-resistant material and preparation method thereof, tundish impact area combined prefabricated part and tundish impact area |
| CN111848189A (en) * | 2020-07-24 | 2020-10-30 | 湖南省娄底市宏冶炉料有限责任公司 | Novel scouring-resistant thermal shock-resistant impact brick, preparation method and current stabilizer |
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2010
- 2010-05-31 CN CN2010202095944U patent/CN201832967U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101869970A (en) * | 2010-05-31 | 2010-10-27 | 莱芜钢铁集团有限公司 | Continuous casting tundish slag blocking wall of composite material and production technology |
| CN101869970B (en) * | 2010-05-31 | 2011-12-07 | 莱芜钢铁集团有限公司 | Continuous casting tundish slag blocking wall of composite material and production technology |
| CN102775158A (en) * | 2012-07-09 | 2012-11-14 | 郑州东方安彩耐火材料有限公司 | Ramming furnace cover of corundum electric arc furnace and production process of ramming furnace cover |
| CN103100676A (en) * | 2013-01-01 | 2013-05-15 | 北京利尔高温材料股份有限公司 | Continuous casting tundish current stabilizer and preparation method thereof |
| CN103100676B (en) * | 2013-01-01 | 2016-05-18 | 北京利尔高温材料股份有限公司 | A kind of continuous casting pouring basket constant staticizer and preparation method thereof |
| CN103736984A (en) * | 2014-01-11 | 2014-04-23 | 莱芜钢铁集团有限公司 | Hot-metal bottle slag stopper with hot metal flowing port and manufacturing method thereof |
| CN110885245A (en) * | 2019-12-04 | 2020-03-17 | 山东国茂冶金材料有限公司 | High-temperature-resistant material and preparation method thereof, tundish impact area combined prefabricated part and tundish impact area |
| CN111848189A (en) * | 2020-07-24 | 2020-10-30 | 湖南省娄底市宏冶炉料有限责任公司 | Novel scouring-resistant thermal shock-resistant impact brick, preparation method and current stabilizer |
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Granted publication date: 20110518 Termination date: 20120531 |