CN1186148C - Air permeable upper downspout of pouring basket in continuous casting - Google Patents
Air permeable upper downspout of pouring basket in continuous casting Download PDFInfo
- Publication number
- CN1186148C CN1186148C CNB031108784A CN03110878A CN1186148C CN 1186148 C CN1186148 C CN 1186148C CN B031108784 A CNB031108784 A CN B031108784A CN 03110878 A CN03110878 A CN 03110878A CN 1186148 C CN1186148 C CN 1186148C
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- upper nozzle
- steel bushing
- charging opening
- water charging
- nozzle brick
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The present invention relates to an air permeable water charging opening of a continuous casting bakie, which comprises air permeable hollow truncated-conic bricks of the water charging opening, an upper steel jacket and a lower steel jacket, wherein slurry is brushed on the outer sides of airproof areas of the bricks of the water charging opening; the outer sides of the bricks of the water charging opening are provided with the upper steel jacket and the lower steel jacket, and clearances are formed among the outer side of the bricks of water charging opening and the inner sides of the upper steel jacket and the lower steel jacket; the outer sides of the bricks of the water charging opening and the inner sides of the upper steel jacket and the lower steel jacket are bonded by gumming dirt; the upper steel jacket and the lower steel jacket are connected by weld. Each brick of the water charging opening comprises the materials by the weight ratio: 25 to 30% of zirconite sand, 35 to 40% of compact corundum, and 30 to 35% of mullite powder. The present invention has the advantages that the water charging opening can bear the washout of high temperature steel liquid, the erosion resistance is favorable, the continuous pouring time number is not less than 13 times, the hole diameter melting loss is less than 1mm, the thermal shock resistance is good, microcrack is not generated in a preheating and pouring process, cold state crack is not generated after the water charging opening is used, and the air permeability is good. The water charging opening can effectively prevent the phenomenon that the aluminum oxide and other impurities in the steel liquid adhere on the inner cavity of the water charging opening; consequently, blockage caused by the reduction of the hole diameter can be prevented.
Description
Technical field
The present invention relates to the functional refractory product of a kind of large-scale continuous casting---purging upper nozzle for continuous casting tundish and manufacturing process thereof.
Background technology
Purging upper nozzle for continuous casting tundish is positioned at the tundish bottom, below join with three layers of slide plate and submersed nozzle, during use, metal hose by filling pipe end is blowing argon gas in molten steel continuously, alundum (Al in the subsidiary molten steel of argon gas microbubble and other impurity come-up, filling pipe end non-nodulating during with the assurance continuous casting, improve steel quality, existing tundish ventilating filling pipe end production technology falls behind, the highest company waters number of times and can only reach 8 times during use, in tundish preheating and casting process, be easy to generate micro-crack, use back cold conditions crackle many, internal orifice dimension enlarge to surpass 3mm, and the continuous casting number of times of steel mill is brought up to 13～14 times from 7～8 times, and existing ventilating filling pipe end can not adapt to.
Summary of the invention
The object of the present invention is to provide the more superior purging upper nozzle for continuous casting tundish of a kind of function.
The object of the present invention is achieved like this;
A kind of purging upper nozzle for continuous casting tundish, comprise ventilative hollow truncated cone upper nozzle brick, last steel bushing, following steel bushing, the airtight district of upper nozzle brick outside slurry, the upper nozzle brick outside is provided with steel bushing, following steel bushing, leave the gap between the upper nozzle brick outside and last steel bushing, the following steel bushing inboard, by clay the upper nozzle brick outside and last steel bushing, following steel bushing inboard are bondd, last steel bushing and following steel bushing are welded to connect.
Above-mentioned purging upper nozzle for continuous casting tundish, the raw material weight ratio of ventilative hollow truncated cone upper nozzle brick is: zircon sand 25～30%, compact alumina 35～40%, mullite powder 30～35%.
Above-mentioned purging upper nozzle for continuous casting tundish, its manufacturing process is:
1) premix: compact alumina and mullite powder are mixed by above-mentioned weight proportion;
2) grind altogether: above-mentioned mixed powder is levigate;
3) mix: above-mentioned powder and zircon sand add water and stir, and reaching can be agglomerating;
4) moulding: according to the shape need of upper nozzle brick, the back pug that will mix is put into the mold compression molding;
5) burn till: upper nozzle brick after the moulding is put into the high temperature kiln about 1600 ℃, burn till;
6) bore mill: repair to burning till the back upper nozzle brick;
7) swabbing: airtight district brushes slurry in the upper nozzle brick outside;
8) assembling: last steel bushing, following steel bushing are enclosed within the upper nozzle brick outside, fix with clay;
9) welding: go up steel bushing and following steel bushing and weld together.
Benefit of the present invention:
1) high temperature that can bear high-temperature molten steel (1550 ℃～1650 ℃) washes away, and good anti-erosion is arranged, and even waters number of times and is no less than 13 times, reaches 650 minutes the duration of pouring, guarantees that the molten steel more than 1500 tons passes through; The aperture melting loss is less than 1mm, and the material metamorphic layer is less than 2mm;
2) good thermal shock, non-microcracked in tundish preheating and casting process, use the no cold conditions crackle in back;
3) elevated temperature strength height can bear in the casting process stopper to the bump of filling pipe end;
4) permeability is good, can prevent effectively that alundum (Al and other impurity adhere at the filling pipe end inner chamber in the molten steel, thereby preventing that the aperture from dwindling causes obstruction;
5) be applicable to all steel kind.
6) apparent size precision height.
Description of drawings
Fig. 1 working state figure figure of the present invention
Fig. 2 structural representation of the present invention
The specific embodiment
Below in conjunction with drawings and Examples to the detailed description of the invention:
As shown in Figure 1, purging upper nozzle for continuous casting tundish 2 is positioned at tundish 3 bottoms, below join with three layers of slide plate 4 and submersed nozzle 5.Ventilating filling pipe end 2 tops are stoppers 1.
As shown in Figure 2, purging upper nozzle for continuous casting tundish, comprise ventilative hollow truncated cone upper nozzle brick 6, last steel bushing 7, following steel bushing 9, the airtight district of upper nozzle brick outside slurry is sealed pore, and there are last steel bushing 7, following steel bushing 9 in upper nozzle brick 6 outsides, leave the gap between upper nozzle brick 6 outsides and last steel bushing 7, following steel bushing 9 inboards, constitute the air flue 8 of ventilation, by clay 10 upper nozzle brick 6 outsides and last steel bushing 7, following steel bushing 9 inboards are bondd, last steel bushing 7 and following steel bushing 9 are welded to connect.
Above-mentioned purging upper nozzle for continuous casting tundish, the raw material weight ratio of ventilative hollow truncated cone upper nozzle brick is: zircon sand 30%, compact alumina 40%, mullite powder 30%.
Its manufacturing process is:
1) premix: compact alumina and mullite powder are mixed by above-mentioned weight proportion;
2) grind altogether: above-mentioned mixed powder is levigate;
3) mix: above-mentioned powder and zircon sand add water and stir, and reaching can be agglomerating;
4) moulding: according to the shape need of upper nozzle brick, the back pug that will mix is put into the mold compression molding;
5) burn till: upper nozzle brick after the moulding is put into the high temperature kiln about 1600 ℃, burn till;
6) bore mill: repair to burning till the back upper nozzle brick;
7) swabbing: airtight district brushes slurry in the upper nozzle brick outside;
8) assembling: last steel bushing, following steel bushing are enclosed within the upper nozzle brick outside, fix with clay;
9) welding: go up steel bushing and following steel bushing and weld together.
The purging upper nozzle for continuous casting tundish of making as stated above, the high temperature that can bear high-temperature molten steel (1550 ℃～1650 ℃) washes away, and good anti-erosion is arranged, and even waters number of times and is no less than 13 times, reaches 650 minutes the duration of pouring, guarantees that the molten steel more than 1500 tons passes through; The aperture melting loss is less than 1mm, and the material metamorphic layer is less than 2mm; Good thermal shock, non-microcracked in tundish preheating and casting process, use the no cold conditions crackle in back; The elevated temperature strength height can bear in the casting process stopper to the bump of filling pipe end; Permeability is good, can prevent effectively that alundum (Al and other impurity adhere at the filling pipe end inner chamber in the molten steel, thereby preventing that the aperture from dwindling causes obstruction; Be applicable to all steel kind.Apparent size precision height.
Claims (3)
1. purging upper nozzle for continuous casting tundish, it is characterized in that: comprise ventilative hollow truncated cone upper nozzle brick, last steel bushing, following steel bushing, the airtight district of upper nozzle brick outside slurry, the upper nozzle brick outside is provided with steel bushing, following steel bushing, leave the gap between the upper nozzle brick outside and last steel bushing, the following steel bushing inboard, by clay the upper nozzle brick outside and last steel bushing, following steel bushing inboard are bondd, last steel bushing and following steel bushing are welded to connect.
2. purging upper nozzle for continuous casting tundish according to claim 1 is characterized in that: the raw material weight ratio of ventilative hollow truncated cone upper nozzle brick is: zircon sand 25～30%, compact alumina 35～40%, mullite powder 30～35%.
3. the manufacturing process of the described purging upper nozzle for continuous casting tundish of claim 2 is characterized in that manufacturing process is:
1) premix: compact alumina and mullite powder are mixed by proportioning;
2) grind altogether: above-mentioned mixed powder is levigate;
3) mix: above-mentioned powder and zircon sand add water and stir, and reaching can be agglomerating;
4) moulding: according to the shape need of upper nozzle brick, the back pug that will mix is put into the mold compression molding;
5) burn till: upper nozzle brick after the moulding is put into the high temperature kiln about 1600 ℃, burn till;
6) bore mill: repair to burning till the back upper nozzle brick;
7) swabbing: airtight district brushes slurry in the upper nozzle brick outside;
8) assembling: last steel bushing, following steel bushing are enclosed within the upper nozzle brick outside, fix with clay;
9) welding: go up steel bushing and following steel bushing and weld together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031108784A CN1186148C (en) | 2003-01-17 | 2003-01-17 | Air permeable upper downspout of pouring basket in continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031108784A CN1186148C (en) | 2003-01-17 | 2003-01-17 | Air permeable upper downspout of pouring basket in continuous casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1431067A CN1431067A (en) | 2003-07-23 |
| CN1186148C true CN1186148C (en) | 2005-01-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031108784A Expired - Fee Related CN1186148C (en) | 2003-01-17 | 2003-01-17 | Air permeable upper downspout of pouring basket in continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1186148C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100410204C (en) * | 2005-06-17 | 2008-08-13 | 武汉科技大学 | Tundish permeable brick and its preparing process |
| CN101830718B (en) * | 2010-05-06 | 2013-02-20 | 广州市白云区石井特种耐火材料厂 | Manufacturing method of corundum zircon brick |
| CN105033232B (en) * | 2015-08-20 | 2018-01-09 | 乾丰自动化设备（深圳）有限公司 | Compound pony ladle and its production method |
| CN109482856A (en) * | 2018-12-15 | 2019-03-19 | 江苏盛耐新材料有限公司 | A kind of overall structure upper nozzle brick |
| CN110004305B (en) * | 2019-05-30 | 2024-06-14 | 岳阳鑫特热能工程技术有限公司 | Online refining device of molten aluminum |
-
2003
- 2003-01-17 CN CNB031108784A patent/CN1186148C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1431067A (en) | 2003-07-23 |
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