CN207564653U - A kind of zirconia-corundum refractory brick riser head heat-preserving structure - Google Patents
A kind of zirconia-corundum refractory brick riser head heat-preserving structure Download PDFInfo
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- CN207564653U CN207564653U CN201721762464.1U CN201721762464U CN207564653U CN 207564653 U CN207564653 U CN 207564653U CN 201721762464 U CN201721762464 U CN 201721762464U CN 207564653 U CN207564653 U CN 207564653U
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- riser
- sand mold
- zirconia
- refractory brick
- corundum refractory
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Abstract
The utility model is related to a kind of zirconia-corundum refractory brick riser head heat-preserving structures,Technical solution is,Including incubator and the sand mold mould being arranged in incubator,Filled with heat preservation sand between the inner wall of incubator and the outer wall of sand mold mould,The sand mold mould is the hollow integral structure of upper opening being made of the brick body sand mold of lower part and the riser sand mold on top,The inner cavity of brick body sand mold forms the brick body molding space of zirconia-corundum refractory brick,The inner cavity of riser sand mold forms feeding space,The upper oral part of riser sand mold is covered with expansion type insulating layer,Expansion type insulating layer is the two-layer composite being made of the mineral wool layer of lower part and the expanded graphite layer on top,By covering expansion type insulating layer in riser upper oral part after the utility model casting,Heat preservation is thermally shielded to riser,Extend the liquid time in riser,So as to improve the unit weight of no shrinkage cavity casting fused cast refractories,The process of exhaust is eliminated in casting cycle simultaneously,Technique is simplified,It is easy to use,Effect is good.
Description
Technical field
The utility model is related to glass furnace electro-melting zircon corundum brick field, particularly a kind of zirconia-corundum refractory brick
Riser head heat-preserving structure.
Background technology
Zirconia-corundum refractory brick is built by laying bricks or stones for the kiln pond of glass furnace, and raw material is the high-quality zirconium for having Australian import
Sand, domestic alumina powder and micro soda ash are raw material, and electric arc furnaces is added in after mixing and passes through 2000 DEG C or more high temperature meltings, finally
By oxygen blast, refining casting sand mold molding, the later stage needs insulation annealing, and blank brick finishes, is pre-assembled, is completed to packaging delivery
The fused cast refractories that zirconium content is 33 ﹪, 36%, 41% are made according to the allotment of zirconium content for entire production procedure, zirconia-corundum refractory brick,
According to the Demand Design of glass furnace at different positions.With the constantly improve of zirconia-corundum refractory brick production technology, from molding
The stabilization of rate to ingredient can make fused cast refractories best in quality, our domestic fused cast refractories in terms of glass furnace performance with
Joint brand " West Beijing is general " " Shandong Asahi Glass " compares the gap for the defects of unique showing service life.And only exist
Without shrinkage cavity brick difference, no shrinkage cavity brick be exactly as its name suggests in brick centering portions without loose, excellent without shrinkage cavity, smooth consistency, close
Money brand is done more outstanding in this respect, therefore the fused cast refractories of joint brand occupy domestic high-end glass industry, and reason is just
Be no shrinkage cavity brick interior solid degree it is good, the service life of glass furnace can be extended, and be the steady production of glass furnace
Bring guarantee.
The unit weight standard of no shrinkage cavity fused cast refractories is that 33# is not less than 3.95 not less than 3.75,41#, and domestic fused cast refractories can
Accomplish this standard, but joint brand without shrinkage cavity fused cast refractories unit weight will exceed this mark 0.05 to 0.1.
By taking tank block specification 300mmx400mmx1500mm as an example, after fused cast refractories pyrosol casting cavity, cavity is contacted
Part be normal temperature state, pyrosol can quickly solidify on surface layer, form a hard shell, and the change dramatically of temperature leads to heat expansion
Contraction is rapidly completed on fused cast refractories surface layer, that is, the volume of fused cast refractories has been shaped during this period；But in fused cast refractories
Between position also in the condition of high temperature of liquid, process of expansion and contraction is far from terminating, also carry out, then brick body centre
Due to expanding with heat and contract with cold, the gap to be formed needs the solution at riser position to supplement, with the extension of time, solution is from height in riser
Temperature constantly declines to low temperature, and shrinkage cavity is not supplemented when solution temperature drops to when viscosity increases to a certain degree in riser.
33# tank blocks specification be 300mmx400mmx1500mm weight about 675kg, unit weight 3.75.When brick weighs 685, hold
Weight is 3.8, and unit weight is 3.85 when brick weighs 693 kilograms, i.e., current 33# pool walls fused cast refractories are to reaching joint brand fused cast refractories
Unit weight need the riser to be to brick body make-up solution weight persistently：10kg to 18kg.
Thermal insulation material of the fused cast refractories in incubator after casting is silica sands of the 3mm to 8mm granularities mostly, at riser to
On specification for 500mmx600mm, due to there is exhaust process after casting, exhaust process about needs 30 minutes, it is therefore an objective to auxiliary
Solution feeding brick body in riser is helped, by observing for many years and the internal structure of brick illustrates that the method cannot reach in fused cast refractories
The ideal effect of portion's densification.And amount of heat is caused to be lost in above riser, shortens the time for becoming solid from liquid.So as to
It draws a conclusion：Extend the liquid time of solution in riser, the time of loose feeding is most effective to solution to brick body in extension riser
Raising fused cast refractories consistency method.
Utility model content
For the above situation, to overcome the defect of the prior art, the purpose of the utility model is just to provide a kind of fused alumina zirconia
Fused cast refractories riser head heat-preserving structure and casting heat preserving method, can effectively solve to extend in riser the feed liquid feeding time, improve fused cast refractories
The problem of unit weight.
The technical solution that the utility model solves is a kind of zirconia-corundum refractory brick riser head heat-preserving structure, including incubator and
The sand mold mould being arranged in incubator, filled with heat preservation sand, the sand between the inner wall of incubator and the outer wall of sand mold mould
Pattern tool is the hollow integral structure of upper opening that is made of the brick body sand mold of lower part and the riser sand mold on top, brick body sand mold
Inner cavity form the brick body molding space of zirconia-corundum refractory brick, the inner cavity of riser sand mold forms feeding space, riser sand mold it is upper
For oral area covered with expansion type insulating layer, expansion type insulating layer is made of the mineral wool layer of lower part and the expanded graphite layer on top
Two-layer composite.
A kind of zirconia-corundum refractory brick casting heat preserving method, includes the following steps：
（1）, sand mold mould is placed in incubator, heat preservation is filled between the inner wall of incubator and the outer wall of sand mold mould
Sand starts to cast melted zirconia-corundum refractory brick feed liquid to sand mold mould；
（2）, after the completion of casting, expansion type insulating layer cover type is placed on to the upper oral part of sand mold mould in 3min,
The expansion type insulating layer is the bilayer being made of the mineral wool layer 31 of lower part and the expanded graphite layer 32 on top
Composite construction；
The mineral wool layer is made of mineral wool；
The expanded graphite layer be by expanded graphite 1000g, floating bead 300g, thermite 200g, high mould waterglass 100g and
Made of water 100g；
By the low mould waterglass of the two-sided sprinkling of mineral wool, moisture state is reached；
Expanded graphite, floating bead, thermite are stirred 3 minutes in blender, then Jiang Shui mixed with high mould waterglass after plus
Enter blender, be stirred for mixture being made in 3 minutes；
Mixture is uniformly layered on mineral wool and struck off up to expansion type insulating layer；
（3）, after 7-14 days outlet form removal up to zirconia-corundum refractory brick.
The utility model mould structure novel and unique, advantages of simple is easy to operate, easily produce, it is at low cost, after casting by
Riser upper oral part covers expansion type insulating layer, and heat preservation is thermally shielded to riser, extends the liquid time in riser, so as to improve
The unit weight of no shrinkage cavity casting fused cast refractories, while the process of exhaust is eliminated in casting cycle, technique is simplified, user
Just, effect is good, is the innovation in fused cast refractories production.
Description of the drawings
Fig. 1 is the sectional front view of the utility model.
Fig. 2 is the sectional view of the utility model expansion type insulating layer.
Specific embodiment
Specific embodiment of the present utility model is described in further detail below in conjunction with attached drawing.
As shown in Figs. 1-2, the utility model includes incubator 4 and the sand mold mould being arranged in incubator, incubator 4
Filled with heat preservation sand 5 between inner wall and the outer wall of sand mold mould, the sand mold mould is by the brick body sand mold 1 of lower part and top
The hollow integral structure for the upper opening that riser sand mold 2 is formed, the inner cavity of brick body sand mold 1 form the brick body of zirconia-corundum refractory brick into
Type space, the inner cavity of riser sand mold 2 form feeding space, and the upper oral part of riser sand mold 2 is covered with expansion type insulating layer 3, expansion
Formula insulating layer 3 is the two-layer composite being made of the mineral wool layer 31 of lower part and the expanded graphite layer 32 on top.
For ensure using effect, the mineral wool layer 31 be mineral wool, thickness 5-8mm；The expanded graphite
The thickness of layer 32 is 15mm.
Heat preservation sand between the lower face of the sand mold mould and the bottom surface of incubator 4 is at least 200mm.
Zirconia-corundum refractory brick feed liquid 6 is filled in brick body molding space and feeding space.
A kind of zirconia-corundum refractory brick casting heat preserving method, includes the following steps：
（1）, sand mold mould is placed in incubator 4, fill and protect between the inner wall of incubator 4 and the outer wall of sand mold mould
Warm sand 5 starts to cast melted zirconia-corundum refractory brick feed liquid to sand mold mould；
（2）, after the completion of casting, 3 cover type of expansion type insulating layer is placed on to the upper oral part of sand mold mould in 3min,
The expansion type insulating layer 3 is the bilayer being made of the mineral wool layer 31 of lower part and the expanded graphite layer 32 on top
Composite construction；
The mineral wool layer 31 is made of mineral wool；
The expanded graphite layer 32 is by expanded graphite 1000g, floating bead 300g, thermite 200g, high mould waterglass 100g
Made of water 100g；
By the low mould waterglass of the two-sided sprinkling of mineral wool, moisture state is reached；
Expanded graphite, floating bead, thermite are stirred 3 minutes in blender, then Jiang Shui mixed with high mould waterglass after plus
Enter blender, be stirred for mixture being made in 3 minutes；
Mixture is uniformly layered on mineral wool and struck off up to expansion type insulating layer；
（3）, after 7-14 days outlet form removal up to zirconia-corundum refractory brick.
The modulus of the low mould waterglass is 2.2 to 2.6, and the modulus of the high mould waterglass is 3.0 to 3.3.
The thickness of the mineral wool layer is 15mm；The thickness of the expanded graphite layer 32 is 15mm.
The thermite is formed for aluminium and di-iron trioxide.
By the above situation it should be apparent that the utility model in riser upper oral part by covering expansion type insulating layer,
Heat preservation is thermally shielded to riser, extends the liquid time in riser, expanded graphite layer expands in temperature-rise period, at 1000 DEG C
Expansion is complete, 200 times or more when swelling volume can reach initial, and graphite worm is known as after expansion, is become from former flakey
The very low vermiform of density forms an extraordinary heat insulation layer, so as to extend the feed liquid liquid time in riser, mineral wool
Layer 31 provides one for expanded graphite layer and supports well, while while preventing expanded graphite layer from being contacted with the feed liquid in riser pollutes
Solution in riser through actual use, achieves good technique effect：
By taking 300mmx400mmx1500mm specifications are without shrinkage cavity tank block as an example：
Riser specification is before improvement：500mm wide x600mm long x700mm high, emit it is salty：672kg, riser unit weight 3.2；Brick
Weight：675kg, brick body unit weight 3.75；
Riser specification is after improvement：500mm wide x600mm long x700mm high, emit it is salty：654kg, riser unit weight 3.10；Brick
Weight：693kg, brick body unit weight 3.85；
Reduce the improvement result of riser：500mmx600mmx600mm, it is 3.0 that riser weight, which is 540kg, riser unit weight, brick
Weight 685kg, brick unit weight are 3.80.
By the above situation it should be apparent that being protected after the utility model casting by covering expansion type in riser upper oral part
Warm layer is thermally shielded riser heat preservation, extends the liquid time in riser, so as to improve the appearance of no shrinkage cavity casting fused cast refractories
If weight using riser is reduced, makes tank block riser weight remain able to reach standard unit weight after reducing about 132kg, riser is pressed
The 10 yuan of calculating of cost price per kilogram, one piece of tank block save 1320 yuan, if using same specification riser, tank block unit weight structural reform
0.1, effect is fairly obvious, and importantly, eliminating the process of exhaust in casting cycle, technique is simplified,
There is good social and economic benefit.
Claims (5)
1. a kind of zirconia-corundum refractory brick riser head heat-preserving structure, including incubator（4）With the sand mold mould being arranged in incubator, protect
Incubator（4）Inner wall and sand mold mould outer wall between filled with heat preservation sand（5）, which is characterized in that the sand mold mould be by
The brick body sand mold of lower part（1）With the riser sand mold on top（2）The hollow integral structure of the upper opening of composition, brick body sand mold（1）
Inner cavity form zirconia-corundum refractory brick brick body molding space, riser sand mold（2）Inner cavity form feeding space, riser sand mold
（2）Upper oral part covered with expansion type insulating layer（3）, expansion type insulating layer（3）It is the mineral wool layer by lower part（31）And top
Expanded graphite layer（32）The two-layer composite of composition.
2. zirconia-corundum refractory brick riser head heat-preserving structure according to claim 1, which is characterized in that the mineral wool layer
（31）For mineral wool, thickness 5-8mm.
3. zirconia-corundum refractory brick riser head heat-preserving structure according to claim 1, which is characterized in that the expanded graphite layer
（32）Thickness be 15mm.
4. zirconia-corundum refractory brick riser head heat-preserving structure according to claim 1, which is characterized in that under the sand mold mould
End face and incubator（4）Bottom surface between heat preservation sand be at least 200mm.
5. zirconia-corundum refractory brick riser head heat-preserving structure according to claim 1, which is characterized in that brick body molding space
With in feeding space be filled with zirconia-corundum refractory brick feed liquid（6）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721762464.1U CN207564653U (en) | 2017-12-18 | 2017-12-18 | A kind of zirconia-corundum refractory brick riser head heat-preserving structure |
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| CN201721762464.1U CN207564653U (en) | 2017-12-18 | 2017-12-18 | A kind of zirconia-corundum refractory brick riser head heat-preserving structure |
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| CN207564653U true CN207564653U (en) | 2018-07-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107856166A (en) * | 2017-12-18 | 2018-03-30 | 郑州远东耐火材料有限公司 | A kind of zirconia-corundum refractory brick riser head heat-preserving structure and casting heat preserving method |
| CN109759692A (en) * | 2019-01-21 | 2019-05-17 | 武汉大学 | A kind of method of outdoor welding aluminium busbar under cold environment |
-
2017
- 2017-12-18 CN CN201721762464.1U patent/CN207564653U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107856166A (en) * | 2017-12-18 | 2018-03-30 | 郑州远东耐火材料有限公司 | A kind of zirconia-corundum refractory brick riser head heat-preserving structure and casting heat preserving method |
| CN107856166B (en) * | 2017-12-18 | 2023-06-27 | 郑州远东耐火材料有限公司 | Insulating structure and casting insulating method for riser of zirconia-corundum fused brick |
| CN109759692A (en) * | 2019-01-21 | 2019-05-17 | 武汉大学 | A kind of method of outdoor welding aluminium busbar under cold environment |
| CN109759692B (en) * | 2019-01-21 | 2020-11-17 | 武汉大学 | Method for outdoor welding of aluminum bus in cold environment |
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