CN106588045A - Tundish for continuous casting - Google Patents
Tundish for continuous casting Download PDFInfo
- Publication number
- CN106588045A CN106588045A CN201611111527.7A CN201611111527A CN106588045A CN 106588045 A CN106588045 A CN 106588045A CN 201611111527 A CN201611111527 A CN 201611111527A CN 106588045 A CN106588045 A CN 106588045A
- Authority
- CN
- China
- Prior art keywords
- calcium
- working lining
- continuous casting
- layer
- magnesium
- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to tundish for continuous casting. The tundish comprises a first working layer, a second working layer, a third working layer, a permanent layer, a thermal-insulation layer and a steel shell which are sequentially stacked from inside to outside. The tundish has the advantages that the tundish adopts three working layers, the calcium content of the three working layers is different and changes in a stepped manner, molten steel can be purified effectively, scouring and corrosion by molten steel and slag can be resisted, slag adhering can be avoided, and tundish tilting can be performed easily; the permanent layer is high in strength and long in service life, and the thermal-insulation layer is good in thermal-insulation effect.
Description
Technical field
The present invention relates to field of steel-making, and in particular to a kind of continuous casting tundish.
Background technology
Tundish is the refractory material containers used in mini-mill steelmaking, receives from ladle to pour the steel for getting off first
Water, is then assigned in each crystallizer by middle water containing opening again.Tundish is the intermediate link of STEELMAKING PRODUCTION flow process, and
It is the connecting points that continuous operation is turned to by intermittently operated.Tundish is improve output of steel and quality important as metallurgical reaction
One ring.With Tapping Temperature of Bof raising, the application of various ladle refining techniques, and middle continuous cast crystallizer number pour the time with even
Improve constantly, the pressure that middle ladle-lining is subject to constantly increases, and working environment becomes more severe.Effect in view of middle bag (subtracts
Pressure, current stabilization, go to be mingled with, store and shunt molten steel), it is necessary to centering ladle-lining is optimized design, reasonable selection refractory material.Mesh
Before, it is all using traditional heat-insulation layer+permanent layer+working lining or permanent layer+working lining that domestic existing tundish liner body is most of
Build form by laying bricks or stones, heat-insulation layer typically adopts refractory fibre, permanent layer to adopt magnesia painting using clay or high alumina castable, working lining
Material.The combination of these materials be present, if do not adopted heat-insulation layer, liner body heat insulation effect is poor, and thermal loss is big；Using resistance to
The heat-insulation layer of fiery fiber, the easy efflorescence of life-time service, causes cavity, there is potential safety hazard；Permanent layer service life is low；Working lining is used
Magnesia coating have that smear is bad, have the problem of secondary pollution to molten steel.
The content of the invention
The technical problem to be solved is to provide a kind of high insulating effect, can purify molten steel and long-lived company
Casting tundish.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of continuous casting tundish, including from the inside to the outside according to
First working lining of secondary stacking, the second working lining, the 3rd working lining, permanent layer, heat-insulation layer and box hat,
First working lining is built by laying bricks or stones by high-calcium type calcium and magnesium matter skinning loam and is formed, and high-calcium type calcium and magnesium matter skinning loam includes following
Each composition of percentage by weight：10%～20% calcium oxide, 50%～70% magnesium oxide, 15%～20% resinoid bond, 3%
～5% paper fiber and 2%～5% carbon fiber；
Second working lining is built by laying bricks or stones by middle calcium type calcium and magnesium matter skinning loam and is formed, and middle calcium type calcium and magnesium matter skinning loam includes following
Each composition of percentage by weight：5%～10% calcium oxide, 60%～80% magnesium oxide, 10%～15% silicon powder, 0%～5%
Explosion-proof fiber and 5%～10% phenol-formaldehyde resin modified；
3rd working lining is built by laying bricks or stones by low calcium type calcium and magnesium matter skinning loam and is formed, and low calcium type calcium and magnesium matter skinning loam includes following
Each composition of percentage by weight：1%～5% calcium oxide, 90%～95% magnesium oxide, 1%～3% boron oxide, 2%～3% aluminum
Powder and 1%～2% sodium tripolyphosphate；
The permanent layer is formed by high alumina castable cast, and the high alumina castable includes following percentage by weight
Each composition：85%～90% aluminium sesquioxide, 5%～8% silicon dioxide, 2%～3% organic fiber, 3%～5% hydration silicon
Hydrochlorate and 0%～2% other impurities；
The heat-insulation layer is made up of aluminosilicate property fiber felt.
The invention has the beneficial effects as follows：A kind of continuous casting of present invention tundish adopts three layers of working lining, and three layers of working lining
Calcareous content it is different, in stepped change, can effectively purify molten steel, be resistant to washing away and corroding for molten steel and slag, together
When non-sticky slag, be easy to turn over bag；Permanent layer intensity is high, long service life, the high insulating effect of heat-insulation layer.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, the thickness of the heat-insulation layer is 10～20mm.
Further, the bulk density of the permanent layer is more than or equal to 2.45g/cm under the conditions of 110 DEG C × 24h3。
Further, the compressive resistance of the permanent layer is more than or equal to 20MPa under the conditions of 110 DEG C × 24h.
Further, the compressive resistance of the permanent layer is more than or equal to 60MPa under the conditions of 1350 DEG C × 3h.
Further, the rupture strength of the permanent layer is more than or equal to 6MPa under the conditions of 110 DEG C × 24h.
Further, the rupture strength of the permanent layer is more than or equal to 12MPa under the conditions of 1350 DEG C × 3h.
Further, the thickness of first working lining is more than the thickness of second working lining, second working lining
Thickness more than the 3rd working lining thickness.
Description of the drawings
Fig. 1 is a kind of structural representation of continuous casting tundish of the invention.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, a working lining, the 2, second working lining, the 3, the 3rd working lining, 4, permanent layer, 5, heat-insulation layer, 6, box hat.
Specific embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
It is non-for limiting the scope of the present invention.
As shown in figure 1, a kind of continuous casting tundish, works including the first working lining 1, second for stacking gradually from the inside to the outside
The 2, the 3rd working lining 3 of layer, permanent layer 4, heat-insulation layer 5 and box hat 6,
First working lining 1 is built by laying bricks or stones by high-calcium type calcium and magnesium matter skinning loam and is formed, the high-calcium type calcium and magnesium matter skinning loam include with
Each composition of lower percentage by weight：10%～20% calcium oxide, 50%～70% magnesium oxide, 15%～20% resinoid bond,
3%～5% paper fiber and 2%～5% carbon fiber；
Second working lining 2 is built by laying bricks or stones by middle calcium type calcium and magnesium matter skinning loam and is formed, the middle calcium type calcium and magnesium matter skinning loam include with
Each composition of lower percentage by weight：5%～10% calcium oxide, 60%～80% magnesium oxide, 10%～15% silicon powder, 0%～
5% explosion-proof fiber and 5%～10% phenol-formaldehyde resin modified；
3rd working lining 3 is built by laying bricks or stones by low calcium type calcium and magnesium matter skinning loam and is formed, the low calcium type calcium and magnesium matter skinning loam include with
Each composition of lower percentage by weight：1%～5% calcium oxide, 90%～95% magnesium oxide, 1%～3% boron oxide, 2%～3%
Aluminium powder and 1%～2% sodium tripolyphosphate；
The permanent layer 4 is formed by high alumina castable cast, and the high alumina castable includes following percentage by weight
Each composition：85%～90% aluminium sesquioxide, 5%～8% silicon dioxide, 2%～3% organic fiber, 3%～5% hydration
Silicate, 0%～2% other impurities；
The heat-insulation layer 5 is made up of aluminosilicate property fiber felt.
The thickness of the heat-insulation layer 5 be 10～20mm, you can think 10mm, can be 20mm, can also for 10 to 20 it
Between any value, such as 15mm.
The bulk density of the permanent layer 4 is more than or equal to 2.45g/cm under the conditions of 110 DEG C × 24h3。
The compressive resistance of the permanent layer 4 is more than or equal to 20MPa under the conditions of 110 DEG C × 24h.
The compressive resistance of the permanent layer 4 is more than or equal to 60MPa under the conditions of 1350 DEG C × 3h.
The rupture strength of the permanent layer 4 is more than or equal to 6MPa under the conditions of 110 DEG C × 24h.
The rupture strength of the permanent layer 4 is more than or equal to 12MPa under the conditions of 1350 DEG C × 3h.
The thickness of first working lining 1 is more than the thickness of second working lining 2, the thickness of second working lining 2
Thickness of the degree more than the 3rd working lining 3.
In specific examples below：
First working lining 1 is built by laying bricks or stones by high-calcium type calcium and magnesium matter skinning loam and is formed, the high-calcium type calcium and magnesium matter skinning loam include with
Each composition of lower percentage by weight：
The content of calcium oxide can be 10%, or 20%, can also be any value between 10% to 20%, example
Such as 15%；
The content of magnesium oxide can be 50%, or 70%, can also be any value between 50% to 70%, example
Such as 60%；
The content of resinoid bond can be 15%, or 20%, can also be arbitrary between 15% to 20%
Value, such as 18%；
The content of paper fiber can be 3%, or 5%, can also be any value between 3% to 5%, for example
4%；
The content of carbon fiber can be 2%, or 5%, can also be any value between 2% to 5%, for example
3%.
Second working lining 2 is built by laying bricks or stones by middle calcium type calcium and magnesium matter skinning loam and is formed, the middle calcium type calcium and magnesium matter skinning loam include with
Each composition of lower percentage by weight：
The content of calcium oxide can be 5%, or 10%, can also be any value between 5% to 10%, for example
7.5%；
The content of magnesium oxide can be 60%, or 80%, can also be any value between 60% to 80%, example
Such as 70%；
The content of silicon powder can be 10%, or 15%, can also be any value between 10% to 15%, example
Such as 12.5%；
The content of explosion-proof fiber can be 0%, or 5%, can also be any value between 0% to 5%, for example
2.5%；
The content of phenol-formaldehyde resin modified can be 5%, or 10%, can also be arbitrary between 5% to 10%
Value, such as 7.5%.
3rd working lining 3 is built by laying bricks or stones by low calcium type calcium and magnesium matter skinning loam and is formed, the low calcium type calcium and magnesium matter skinning loam include with
Each composition of lower percentage by weight：
The content of calcium oxide can be 1%, or 5%, can also be any value between 1% to 5%, for example
2%；
The content of magnesium oxide can be 90%, or 95%, can also be any value between 90% to 95%, example
Such as 92%；
The content of boron oxide can be 1%, or 3%, can also be any value between 1% to 3%, for example
2%；
The content of aluminium powder can be 2%, or 3%, can also be any value between 2% to 3%, for example
2.5%；
The content of sodium tripolyphosphate can be 1%, or 2%, can also be any value between 1% to 2%, example
Such as 1.5%.
The permanent layer 4 is formed by high alumina castable cast, and the high alumina castable includes following percentage by weight
Each composition：
The content of aluminium sesquioxide can be 85%, or 90%, can also be arbitrary between 85% to 90%
Value, such as 87%；
The content of silicon dioxide can be 5%, or 8%, can also be any value between 5% to 8%, for example
6%；
The content of organic fiber can be 2%, or 3%, can also be any value between 2% to 3%, for example
2%；
The content of hydrosilicate can be 3%, or 5%, can also be any value between 3% to 5%, example
Such as 4%；
The content of other impurities can be 0%, or 3%, can also be any value between 0% to 2%, for example
1%.
A kind of continuous casting of present invention tundish adopts three layers of working lining, and the calcareous content of three layers of working lining is different, in rank
The change of ladder type, can effectively purify molten steel, be resistant to washing away and corroding for molten steel and slag, while non-sticky slag, being easy to turn over bag；Forever
Long layer intensity is high, long service life, the high insulating effect of heat-insulation layer.
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (8)
1. a kind of continuous casting tundish, it is characterised in that：Including the first working lining for stacking gradually from the inside to the outside, the second work
Layer, the 3rd working lining, permanent layer, heat-insulation layer and box hat,
First working lining is built by laying bricks or stones by high-calcium type calcium and magnesium matter skinning loam and is formed, and high-calcium type calcium and magnesium matter skinning loam includes following weight
Each composition of percentage ratio：10%～20% calcium oxide, 50%～70% magnesium oxide, 15%～20% resinoid bond, 3%～
5% paper fiber and 2%～5% carbon fiber；
Second working lining is built by laying bricks or stones by middle calcium type calcium and magnesium matter skinning loam and is formed, and middle calcium type calcium and magnesium matter skinning loam includes following weight
Each composition of percentage ratio：5%～10% calcium oxide, it is 60%～80% magnesium oxide, 10%～15% silicon powder, 0%～5% explosion-proof
Fiber and 5%～10% phenol-formaldehyde resin modified；
3rd working lining is built by laying bricks or stones by low calcium type calcium and magnesium matter skinning loam and is formed, and low calcium type calcium and magnesium matter skinning loam includes following weight
Each composition of percentage ratio：1%～5% calcium oxide, 90%～95% magnesium oxide, 1%～3% boron oxide, 2%～3% aluminium powder and
1%～2% sodium tripolyphosphate；
The permanent layer by high alumina castable cast form, the high alumina castable include following percentage by weight it is each into
Point：85%～90% aluminium sesquioxide, 5%～8% silicon dioxide, 2%～3% organic fiber, 3%～5% hydrosilicate
With 0%～2% other impurities；
The heat-insulation layer is made up of aluminosilicate property fiber felt.
2. a kind of continuous casting tundish according to claim 1, it is characterised in that：The thickness of the heat-insulation layer be 10～
20mm。
3. a kind of continuous casting tundish according to claim 1 and 2, it is characterised in that：The bulk density of the permanent layer
It is more than or equal to 2.45g/cm under the conditions of 110 DEG C × 24h3。
4. a kind of continuous casting tundish according to claim 1 and 2, it is characterised in that：The compressive resistance of the permanent layer
It is more than or equal to 20MPa under the conditions of 110 DEG C × 24h.
5. a kind of continuous casting tundish according to claim 1 and 2, it is characterised in that：The compressive resistance of the permanent layer
It is more than or equal to 60MPa under the conditions of 1350 DEG C × 3h.
6. a kind of continuous casting tundish according to claim 1 and 2, it is characterised in that：The rupture strength of the permanent layer
It is more than or equal to 6MPa under the conditions of 110 DEG C × 24h.
7. a kind of continuous casting tundish according to claim 1 and 2, it is characterised in that：The rupture strength of the permanent layer
It is more than or equal to 12MPa under the conditions of 1350 DEG C × 3h.
8. a kind of continuous casting tundish according to claim 1 and 2, it is characterised in that：The thickness of first working lining
Degree is more than the thickness of second working lining, and the thickness of second working lining is more than the thickness of the 3rd working lining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611111527.7A CN106588045A (en) | 2016-12-06 | 2016-12-06 | Tundish for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611111527.7A CN106588045A (en) | 2016-12-06 | 2016-12-06 | Tundish for continuous casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106588045A true CN106588045A (en) | 2017-04-26 |
Family
ID=58595938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611111527.7A Pending CN106588045A (en) | 2016-12-06 | 2016-12-06 | Tundish for continuous casting |
Country Status (1)
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| CN (1) | CN106588045A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111644607A (en) * | 2020-07-07 | 2020-09-11 | 鞍钢股份有限公司 | Method for preventing molten steel from recarburizing in ultra-low carbon steel production process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111644607A (en) * | 2020-07-07 | 2020-09-11 | 鞍钢股份有限公司 | Method for preventing molten steel from recarburizing in ultra-low carbon steel production process |
| CN111644607B (en) * | 2020-07-07 | 2021-12-24 | 鞍钢股份有限公司 | Method for preventing molten steel from recarburizing in ultra-low carbon steel production process |
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