CN105436495A - Tundish and tundish water gap impervious steel installing method - Google Patents
Tundish and tundish water gap impervious steel installing method Download PDFInfo
- Publication number
- CN105436495A CN105436495A CN201510852018.9A CN201510852018A CN105436495A CN 105436495 A CN105436495 A CN 105436495A CN 201510852018 A CN201510852018 A CN 201510852018A CN 105436495 A CN105436495 A CN 105436495A
- Authority
- CN
- China
- Prior art keywords
- ramming
- river
- mouth
- tundish
- water gap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 28
- 239000010959 steel Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000011449 brick Substances 0.000 claims abstract description 37
- 238000010276 construction Methods 0.000 claims abstract description 19
- 239000007767 bonding agent Substances 0.000 claims abstract description 9
- 238000011049 filling Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 36
- 238000009434 installation Methods 0.000 claims description 14
- NACUKFIFISCLOQ-UHFFFAOYSA-N [Mg].[Cr] Chemical compound [Mg].[Cr] NACUKFIFISCLOQ-UHFFFAOYSA-N 0.000 claims description 7
- QRRWWGNBSQSBAM-UHFFFAOYSA-N alumane;chromium Chemical compound [AlH3].[Cr] QRRWWGNBSQSBAM-UHFFFAOYSA-N 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 7
- 239000005011 phenolic resin Substances 0.000 claims description 5
- 229920001568 phenolic resin Polymers 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 238000009749 continuous casting Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001051 Magnalium Inorganic materials 0.000 description 1
- DNXNYEBMOSARMM-UHFFFAOYSA-N alumane;zirconium Chemical group [AlH3].[Zr] DNXNYEBMOSARMM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention discloses a tundish and a tundish water gap impervious steel installing method. The tundish water gap impervious steel installing method comprises the step of brick cup fixing, the step of water gap positioning and the step of ramming construction. The step of ramming construction comprises the procedures that firstly, the outer surface of a water gap positioned at the water gap installing position is evenly coated with a layer of bonding agent, and the water gap and a ramming mass can be better combined conveniently; and secondly, the periphery of the water gap is filled with the ramming mass, a tamper is used for performing impacted tamping every time filling of the ramming mass with the thickness of 20-40 mm is achieved, and the process is repeated many times till the ramming mass layer construction is finished. The tundish is further disclosed. The tundish comprises a brick cup, the water gap and a ramming mass layer. The ramming mass layer is closely combined to the periphery of the water gap through the ramming construction step in the tundish water gap impervious steel installing method. According to the method and the device, a penetrating gap between a traditional water gap and a brick cup can be blocked, and seepage of molten steel is effectively blocked.
Description
Technical field
The present invention relates to a kind of continuous-casting steel pouring device, refer to a kind of tundish and middle water containing opening steel impermeable installation method especially.
Background technology
The 1950's, the Development of Continuous Casting Technique as steel and iron industry revolution mark gets up, and be characterized in that process speed is fast, investment is concentrated, and technology is gradually improved.Compared with traditional die casting, continuous casting has the superiority improving recovery rate of iron and reduce energy ezpenditure.The realization of sequence casting makes STEELMAKING PRODUCTION operation simplify, and flow process shortens, and production efficiency significantly improves.
Tundish is the intermediate link of STEELMAKING PRODUCTION flow process, is the connecting points being turned to continued operation by intermittently operated.Tundish is generally made up of inclusion, clad, the mouth of a river, flow control structure etc.As shown in Fig. 1 ~ 2, middle water containing opening is generally arranged in the perforate bottom inclusion by brick cup.Inclusion is three-decker, is respectively steel plate 7, permanent layer 6 and working lining 2 from outside to inside.Brick cup 3 is arranged on the bottom of inclusion, and its underpart is connected with steel plate 7, and top is lined with working lining 2.The mouth of a river 5 is passed brick cup 3 and is fixed in brick cup 3 by joint filler 1.Brick cup 3, joint filler 1 generally select the material corresponding with the mouth of a river 5, and as aluminium chromium matter or magnesium chromium matter, working lining is generally magnesia.
Because the mouth of a river and brick cup are respectively two independently entirety, when run into coordinate imprecision between them time, the gap that easy formation runs through, although be filled with joint filler therebetween, but molten steel still often occurs permeate along between the mouth of a river and brick cup, time serious even there is security incident in impact casting.
Summary of the invention
The object of the present invention is to provide and a kind ofly effectively can block the middle water containing opening steel impermeable installation method of the infiltration of molten steel between the mouth of a river and brick cup and adopt the tundish of this steel impermeable installation method.
For achieving the above object, middle water containing opening steel impermeable installation method designed by the present invention, comprise the step at the step of fixing brick cup, the mouth of a river, location, and the step of ramming construction, the step of described ramming construction is: 1) will be positioned at mouth of a river outer surface uniform application one deck bonding agent of installation site, the mouth of a river, is convenient to the mouth of a river and ramming mass better combines.2) around the mouth of a river, ramming mass is filled, tight with beater ramming after often filling the thick ramming mass of 20 ~ 40mm, repeatedly until the construction of the ramming bed of material is complete.According to the difference of mouth of a river installation form, the order of above-mentioned fixing brick cup, the mouth of a river, location, ramming construction has certain difference.For fitted outside, erection sequence is: first locate the mouth of a river, and next carries out ramming construction, finally installs and fixes brick cup.For built-in type, erection sequence is: first install and fix brick cup, and next locates the mouth of a river, finally carries out ramming construction.In follow-up baking and use procedure, the ramming bed of material can be sintered together with the mouth of a river, seamless generation.
Preferably, the material of described ramming mass is the aluminium chromium matter corresponding with mouth of a river material or magnesium chromium matter, and wherein Homogeneous phase mixing has bonding agent.Concrete selection aluminium chromium matter or magnesium chromium matter, determine according to the content of aluminium in the mouth of a river or magnesium.If the content of aluminium is higher in the mouth of a river, then aluminium chromium matter selected by ramming mass, if the content of magnesium is higher, then selects magnesium chromium matter.The material corresponding to the mouth of a river selected by ramming mass, the sintering at ramming mass and the mouth of a river can be promoted on the one hand, making the mouth of a river consistent with the expansion character of ramming mass on the other hand, avoiding not mating because expanding in use procedure causing the ramming bed of material to be separated with the mouth of a river and producing gap.Anti-molten steel can be played to the erosion of refractory material and infiltration containing chromium.
Preferably, described step 1), step 2) in bonding agent be phenolic resins, add the sintering strength that phenolic resins adds the ramming bed of material.
The present invention discloses a kind of tundish, comprise brick cup, the mouth of a river and the ramming bed of material, the described ramming bed of material adopts the step of ramming construction in aforementioned middle water containing opening steel impermeable installation method to combine closely in the periphery at the mouth of a river.The present invention only relates to the steel impermeable design of middle water containing opening to the improvement of tundish, and other parts of tundish adopt known features.
Preferably, the ramming bed of material along the thickness of mouth of a river axis be 100mm and more than, entirety can be formed with the mouth of a river, play the effect significantly blocking infiltration.Further, according to steel mill's mouth of a river length and liner in dundish thickness, ramming mass layer thickness controls at 100 ~ 250mm.
Alternatively, the described mouth of a river is fitted outside, and the described ramming bed of material is positioned at the below of brick cup.
Alternatively, the described mouth of a river is built-in type, and the inside of described brick cup is stairstepping, in the cavity that the described ramming bed of material is formed between the ladder upper strata and the mouth of a river of brick cup, is embedded in this cavity by ramming construction.
Preferably, the junction at described brick cup and the mouth of a river is filled with joint filler.
The invention has the beneficial effects as follows: the present invention adds the certain thickness ramming bed of material of one deck by ramming construction at mouth of a river skin, because the ramming bed of material and mouth of a river outer surface are in conjunction with closed seamless gap, and there is certain extrusion stress to the mouth of a river, therefore, it is possible to block traditional mouth of a river and brick cup run through gap, effectively block the infiltration of molten steel.
Accompanying drawing explanation
Fig. 1 is the structural representation of fitted outside tundish in prior art.
Fig. 2 is the structural representation of built-in type tundish in prior art.
The structural representation of the fitted outside tundish of Fig. 3 designed by the present invention.
The structural representation of the built-in type tundish of Fig. 4 designed by the present invention.
Wherein: joint filler 1, working lining 2, brick cup 3, the ramming bed of material 4, the mouth of a river 5, permanent layer 6, steel plate 7
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Middle water containing opening steel impermeable installation method provided by the present invention, comprise the step of fixing brick cup, the step at the mouth of a river, location and the step of ramming construction, the step of described ramming construction is: 1) will be positioned at the mouth of a river 5 outer surface uniform application one deck thermoset phenolic resin of installation site, the mouth of a river as bonding agent; 2) around the mouth of a river 5, ramming mass is filled, tight with beater ramming after often filling the thick ramming mass of 25mm, repeatedly until the ramming bed of material 4 is constructed complete.The material of ramming mass is the aluminium chromium matter corresponding with the mouth of a river 5 material or magnesium chromium matter, and wherein Homogeneous phase mixing has thermoset phenolic resin as bonding agent.
As Fig. 1 ~ 2 are depicted as tundish of the prior art, its structure is described in background technology part, repeats no more in this.
As shown in Figure 3, the tundish designed by the present invention, comprises brick cup 3, the mouth of a river 5, the ramming bed of material 4, and brick cup 3 is filled with joint filler 1 with the junction at the mouth of a river 5.The ramming bed of material 4 adopts the step of ramming construction in preceding method to combine closely in the periphery at the mouth of a river 5.In figure, the mouth of a river 5 is fitted outside, and the thickness of the ramming bed of material 4 is 200mm, and the ramming bed of material 4 is positioned at the below of brick cup 3, the top of steel plate 7.The material at the mouth of a river is magnalium carbonaceous, and magnesium chromium matter selected by ramming mass.The top of brick cup 3 is provided with working lining 2, and working lining 2 makes top, the mouth of a river and neighbouring liner in dundish keep smooth, and working lining is magnesia coating.
As shown in Figure 4, in another embodiment, the mouth of a river 5 is built-in type, and the thickness of the ramming bed of material 4 is 120mm, and the inside of brick cup 3 is stairstepping, in the toroidal cavity that the ramming bed of material 4 is formed between the ladder upper strata and the mouth of a river 5 of brick cup 3.The material at the mouth of a river is aluminium zirconium matter, ramming mass aluminium chromium matter.The bottom of brick cup 3 is arranged on steel plate 7, and the top of brick cup 3 and the ramming bed of material 4 is provided with working lining 2, and working lining 2 makes top, the mouth of a river and neighbouring liner in dundish keep smooth, and working lining is magnesia coating.
Claims (8)
1. a middle water containing opening steel impermeable installation method, comprise the step of fixing brick cup and the step at the mouth of a river, location, it is characterized in that, also comprise the step of ramming construction, the step of described ramming construction comprises: 1) will be positioned at the mouth of a river (5) outer surface uniform application one deck bonding agent of installation site, the mouth of a river; 2) around the mouth of a river (5), ramming mass is filled, tight with beater ramming after often filling the thick ramming mass of 20 ~ 40mm, repeatedly until the ramming bed of material (4) is constructed complete.
2. middle water containing opening steel impermeable installation method according to claim 1, is characterized in that: the material of described ramming mass is the aluminium chromium matter corresponding with the mouth of a river (5) material or magnesium chromium matter, and wherein Homogeneous phase mixing has bonding agent.
3. middle water containing opening steel impermeable installation method according to claim 2, is characterized in that: described bonding agent is phenolic resins.
4. a tundish, comprise brick cup (3) and the mouth of a river (5), it is characterized in that: also comprise the ramming bed of material (4), the described ramming bed of material (4) adopts the step of the construction of the ramming according to any one of claims 1 to 3 to combine closely in the periphery of the mouth of a river (5).
5. tundish according to claim 4, is characterized in that: the thickness of the described ramming bed of material (4) is 100 ~ 250mm.
6. the tundish according to claim 4 or 5, is characterized in that: the described mouth of a river (5) are fitted outside, and the described ramming bed of material (4) is positioned at the below of brick cup (3).
7. the tundish according to claim 4 or 5, it is characterized in that: the described mouth of a river (5) are built-in type, the inside of described brick cup (3) is stairstepping, and the described ramming bed of material (4) is positioned at the cavity formed between the ladder upper strata of brick cup (3) and the mouth of a river (5).
8. the tundish according to claim 4 or 5, is characterized in that: described brick cup (3) is filled with joint filler (1) with the junction at the mouth of a river (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510852018.9A CN105436495B (en) | 2015-11-26 | 2015-11-26 | Tundish and middle water containing opening steel impermeable installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510852018.9A CN105436495B (en) | 2015-11-26 | 2015-11-26 | Tundish and middle water containing opening steel impermeable installation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105436495A true CN105436495A (en) | 2016-03-30 |
| CN105436495B CN105436495B (en) | 2018-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510852018.9A Active CN105436495B (en) | 2015-11-26 | 2015-11-26 | Tundish and middle water containing opening steel impermeable installation method |
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| Country | Link |
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| CN (1) | CN105436495B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111644608A (en) * | 2019-11-22 | 2020-09-11 | 首钢京唐钢铁联合有限责任公司 | Tundish water feeding port structure and mounting method thereof |
| CN111719037A (en) * | 2019-03-21 | 2020-09-29 | 本钢板材股份有限公司 | Method for increasing number of continuous casting furnaces of double-flow plate blank tundish |
| CN114378290A (en) * | 2021-12-13 | 2022-04-22 | 首钢京唐钢铁联合有限责任公司 | Tundish water feeding port installation method |
| CN114932214A (en) * | 2022-06-13 | 2022-08-23 | 山西太钢不锈钢股份有限公司 | Masonry method for preventing steel infiltration of stainless steel continuous casting tundish nozzle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112517900A (en) * | 2020-11-17 | 2021-03-19 | 天工爱和特钢有限公司 | Technology for manufacturing water gap of powder making tundish |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5348275A (en) * | 1993-07-26 | 1994-09-20 | Magneco/Metrel, Inc. | Tundish nozzle assembly block |
| JPH10338578A (en) * | 1997-06-06 | 1998-12-22 | Toshiba Ceramics Co Ltd | Ramming material, insertion-type immersion nozzle fixed with that material, and fixing method of insertion-type immersion nozzle |
| CN102151822A (en) * | 2011-05-24 | 2011-08-17 | 莱芜钢铁集团有限公司 | Continuous casting tundish and manufacturing method thereof |
| CN202479459U (en) * | 2012-02-24 | 2012-10-10 | 宝山钢铁股份有限公司 | Automatic cast-on tube device for continuous casting tundish |
-
2015
- 2015-11-26 CN CN201510852018.9A patent/CN105436495B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5348275A (en) * | 1993-07-26 | 1994-09-20 | Magneco/Metrel, Inc. | Tundish nozzle assembly block |
| JPH10338578A (en) * | 1997-06-06 | 1998-12-22 | Toshiba Ceramics Co Ltd | Ramming material, insertion-type immersion nozzle fixed with that material, and fixing method of insertion-type immersion nozzle |
| CN102151822A (en) * | 2011-05-24 | 2011-08-17 | 莱芜钢铁集团有限公司 | Continuous casting tundish and manufacturing method thereof |
| CN202479459U (en) * | 2012-02-24 | 2012-10-10 | 宝山钢铁股份有限公司 | Automatic cast-on tube device for continuous casting tundish |
Non-Patent Citations (2)
| Title |
|---|
| 中国工程建设标准化协会工业炉砌筑专业委员会编: "《筑炉工程手册》", 31 January 2007, 冶金工业出版社 * |
| 沈明科等: "钢包座砖和中间包水口周围填充用刚玉质捣打料的研制", 《耐火材料》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719037A (en) * | 2019-03-21 | 2020-09-29 | 本钢板材股份有限公司 | Method for increasing number of continuous casting furnaces of double-flow plate blank tundish |
| CN111644608A (en) * | 2019-11-22 | 2020-09-11 | 首钢京唐钢铁联合有限责任公司 | Tundish water feeding port structure and mounting method thereof |
| CN111644608B (en) * | 2019-11-22 | 2022-01-18 | 首钢京唐钢铁联合有限责任公司 | Tundish water feeding port structure and mounting method thereof |
| CN114378290A (en) * | 2021-12-13 | 2022-04-22 | 首钢京唐钢铁联合有限责任公司 | Tundish water feeding port installation method |
| CN114378290B (en) * | 2021-12-13 | 2024-03-19 | 首钢京唐钢铁联合有限责任公司 | Tundish water feeding port installation method |
| CN114932214A (en) * | 2022-06-13 | 2022-08-23 | 山西太钢不锈钢股份有限公司 | Masonry method for preventing steel infiltration of stainless steel continuous casting tundish nozzle |
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| Publication number | Publication date |
|---|---|
| CN105436495B (en) | 2018-06-19 |
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Effective date of registration: 20180413 Address after: No. 1, Qingshan District, Hubei Province, Wuhan City, Hubei Applicant after: Wuhan Iron & Steel (Group) Corp. Address before: 15 Wuchang, Wuhan Friendship Avenue, No. 999, block A, layer (Wuhan Iron and steel science and technology innovation department), No. 430080, Applicant before: Wuhan Iron & Steel (Group) Corp. |
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