CN204111786U - A kind of nitrogen protection iron runner - Google Patents
A kind of nitrogen protection iron runner Download PDFInfo
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- CN204111786U CN204111786U CN201420533067.7U CN201420533067U CN204111786U CN 204111786 U CN204111786 U CN 204111786U CN 201420533067 U CN201420533067 U CN 201420533067U CN 204111786 U CN204111786 U CN 204111786U
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- pipe line
- gas pipe
- iron runner
- main body
- iron
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Abstract
The utility model provides a kind of nitrogen protection iron runner, comprises iron runner main body and pipeline gas injection device, and described pipeline gas injection device comprises gas pipe line, gas pipe line fixed mechanism and gas guide mechanism; Wherein: described iron runner main body is connected with last furnace shell, the furrow bank both sides of described iron runner main body are furnished with described gas pipe line respectively along ditch length direction; Described gas pipe line is provided with inlet pipe near iron notch end, and described gas pipe line is provided with air curtain forming portion; Described gas pipe line is connected with described last furnace shell with described iron runner main body respectively by described gas pipe line fixed mechanism, and each described gas pipe line is provided with described gas guide mechanism.Introduce nitrogen insulation blocking technology, in operculum colpi, introduce nitrogen mode by all adopting pipeline blowing method or all adopting or adopt pipeline to blow and protection that combined mode of ventilating in operculum colpi realizes iron runner refractory materials.
Description
Technical field
The utility model relates to the Long Life Technology of iron runner refractory materials, is specifically related to a kind of nitrogen protection iron runner.
Background technology
Iron runner refractory materials (is generally Al
2o
3-SiC-C matter) first erosion damage mechanism be in use that the C of material surface is by the O in air
2oxidation, causes the anti-slag penetrating power of material obviously to decline.Due to slag and carbon nonwetting, carbon is good anti-slag permeate substance, but carbon be at high temperature easy to oxidation, once oxidized, slag is just very easy to penetrate in refractory castable.Therefore the erosion of iron runner refractory materials is not only that slag in iron runner reacts with the refractory materials on surface, slag also can penetrate in refractory materials simultaneously, react with refractory materials component within the scope of certain depth and form the material of low melting point, cause the erosion to refractory materials.
In Practical Project, often by adding as Pure Silicon Metal, silicon nitride, norbide etc. to stop the oxidation of carbon in refractory materials at interior antioxidant in mould material, as adopt at present following several measure to improve iron runner the erosion-resisting characteristics of refractory materials that uses:
The first: is at original Al
2o
3a certain amount of Si is added on basis to-SiC-C matter iron runner castable
3n
4with metal Si, utilize reaction in－situ mechanism, obtain Sialon (Sialon) in conjunction with Al
2o
3-SiC-C matter iron runner castable.Its mechanism of slag resistance is: the Si first added
3n
4, Si and Al
2o
3reaction in－situ occurs and generates Sialon, material internal is combined more tight, and the Sialon activity generated is higher, gas is released in oxidation, stops the infiltration of slag; Secondly, Sialon dissolves in slag, and make slag become high silica glass containing N, viscosity increases; In addition, Al
2o
3react with the MgO of slag and generate MgAl
2o
4, form blocking layer, enhance Al to a certain extent
2o
3-SiC-C matter mould material impermeabilisation and erosion performance.
The second: by the Al of contrast different carbon source (as coke, pelletted pitch, carbon black etc.)
2o
3-SiC-C matter iron runner castable apparent porosity, anti-folding and ultimate compression strength, finally select coke as carbon source, obtain the mould material that apparent porosity is less, have certain anti-folding and ultimate compression strength.
The third: utilize natural quartz and coke as raw material, adopt CRN method to prepare Si
3n
4-SiC composite diphase material, it can be used as additive to join Al
2o
3in-SiC-C matter iron runner castable (add-on is about 6%), sample is after the thermal treatment of 1450 DEG C, strength at normal temperature is maximum reaches 11.63MPa, ultimate compression strength is maximum reaches 34.50MPa, Linear change rate is about 0.07%, and this material can stop slag to corrode the infiltration of mould material to a certain extent.
Can find out, existing thinking is often by improving Al
2o
3the impermeabilisation erosion performance of-SiC-C matter iron runner castable reaches the object improving iron runner work-ing life, and this is proposed extra high requirement to the material of mould material and performance.But from the viewpoint of the practical application of iron runner, even if refractory castable quality has reached higher even very high level, but along with the continuous increase of blast furnace casting amount, iron runner erosion degree still can obviously increase progressively, for making iron runner continuous firing, the later stage still must constantly to its gunning refractory.
Utility model content
The basic reason that iron runner castable impermeabilisation ability is lower is that C in material is by the O in air
2oxidation, and the oxidized essence of carbon is with the oxygen element in the air of mould material surface contact and the carbon in material is anti-raw reacts, to this, utility model people proposes such technical problem from another thinking: if can make, oxygen level the gas of contact iron runner refractory surface is very low does not even almost have oxygen, then can avoid the generation of oxidation of coal in mould material, at least can there is substantial delaying in the speed of this kinds of oxidation reaction.
In view of this, the utility model provides a kind of fire-resistant long-lived iron runner adopting nitrogen protection, is intended to, by adopting nitrogen protection slow down or stop the oxidation of coal in iron runner refractory materials, extend (carbonaceous or carbon containing refractory particularly Al
2o
3-SiC-C matter) work-ing life of iron runner refractory materials.
The technical solution adopted in the utility model is specially:
A kind of nitrogen protection iron runner, comprise iron runner main body and pipeline gas injection device, described pipeline gas injection device comprises gas pipe line, gas pipe line fixed mechanism and gas guide mechanism; Wherein: described iron runner main body is connected with last furnace shell, the furrow bank both sides of described iron runner main body are furnished with described gas pipe line respectively along ditch length direction; Described gas pipe line is provided with inlet pipe near iron notch end, and described gas pipe line is provided with air curtain forming portion; Described gas pipe line is connected with described last furnace shell with described iron runner main body respectively by described gas pipe line fixed mechanism, and each described gas pipe line is provided with described gas guide mechanism.
In above-mentioned nitrogen protection iron runner; described air curtain forming portion is be located at multiple spray orifices of described gas pipe line; described spray orifice is single or double layout along gas pipe line direction; the diameter of described spray orifice is 8-15mm; the spacing of adjacent described spray orifice is 50-150mm; the zero position distance iron notch 0.8-2m of described spray orifice, described spray orifice terminates in gas pipe line tail end.
In above-mentioned nitrogen protection iron runner, described air curtain forming portion is the slit arranged along gas pipe line direction, and the width of described slit is 2-5mm, and the zero position distance iron notch 0.8-2m of described slit, described slit terminates in gas pipe line tail end.
In above-mentioned nitrogen protection iron runner, described gas pipe line fixed mechanism comprises hinge and bearing, and the first end of described gas pipe line is located at by described hinge, and the second end of described gas pipe line is located at by described bearing; Described gas pipe line is connected with described last furnace shell by described hinge, described gas pipe line with described hinge for rotating shaft is rotated in the horizontal direction, described gas pipe line by described seat supports in described iron runner main body.
In above-mentioned nitrogen protection iron runner, described gas guide mechanism is flow deflector, and described flow deflector is smooth plate or cambered plate.
In above-mentioned nitrogen protection iron runner, the width of described smooth plate is 150-300mm, and the angle that described smooth plate and iron runner inner-wall surface are formed is 20-40 °.
In above-mentioned nitrogen protection iron runner, the surface-coated of described flow deflector has refractory materials.
In above-mentioned nitrogen protection iron runner; the nearly skimmer end of the operculum colpi of described iron runner is set to blind end, and the nearly iron notch end of described operculum colpi is set to semiclosed end, and described blind end is provided with nitrogen and passes into structure; described operculum colpi shrouds described iron runner main body, forms nitrogen container cavity.
The nitrogen protection method of above-mentioned nitrogen protection iron runner is specially: first nitrogen enters gas pipe line by inlet pipe, wherein the first end of gas pipe line is fixed on hinge, gas pipe line is that rotating shaft is rotated in the horizontal direction with hinge, the second end of gas pipe line by seat supports in iron runner main body; Enter the nitrogen of gas pipe line through the spray orifice near gas pipe line bottom side or slit ejection, and diversed plate guiding iron runner material surface, form nitrogen blanket on iron runner material surface.When being provided with operculum colpi, the nearly skimmer end of cleek operculum colpi is set to blind end, nearly iron notch end is set to semiclosed end, described operculum colpi shrouds described iron runner main body, form nitrogen container cavity, nitrogen has nitrogen to pass into structure to pass into nitrogen container cavity through blind end, and the nitrogen gas concn led in nitrogen container cavity remains on the level of preset value.
In Practical Project, above-mentioned pneumatic tube mode and add operculum colpi mode and can be used alone, also can conbined usage; Both can gas pipe line mode be used to protect by whole piece iron runner, full ditch also can be used to add operculum colpi mode and protect, can also closely iron notch end use pneumatic tube mode and closely the use of skimmer end add operculum colpi mode and protected.
The beneficial effect that the utility model produces is:
The utility model, by shrouding with the working face of nitrogen by iron runner, reduces the chance that the oxygen in air contacts with iron runner material to greatest extent, reaches the object delaying the oxidation of iron runner refractory materials.And nitrogen (purity is greater than 99.99%) belongs to oxygen byproduct in Iron And Steel Company, being generally excessive gas, is therefore also the effective utilization to nitrogen resource on the other hand.Technical scheme in the utility model, through apparent distortion, may be used for the protection against oxidation of carbonaceous refractory lining in other situations or carbon containing refractory equally.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, more completely the utility model can be understood better.Accompanying drawing described herein is used to provide further understanding of the present utility model, and embodiment and explanation thereof, for explaining the utility model, are not formed improper restriction of the present utility model.
Fig. 1 is the structural representation (when without operculum colpi) of a kind of nitrogen protection iron runner of the utility model;
Fig. 2 is the pipeline section schematic diagram of a kind of nitrogen protection iron runner of the utility model.
In figure:
1, last furnace shell 2, gas pipe line 3, flow deflector 4, iron runner 5, bearing 6, inlet pipe 7, hinge 8, slit.
Embodiment
Below in conjunction with drawings and Examples, the technical solution of the utility model is described in further detail.
A kind of nitrogen protection iron runner as shown in Figure 1, comprises iron runner main body and pipeline gas injection device, and pipeline gas injection device comprises gas pipe line 2, gas pipe line fixed mechanism and gas guide mechanism; Wherein: the furrow bank both sides of iron runner main body are furnished with gas pipe line 2 respectively along ditch length direction; The outside of each gas pipe line is provided with inlet pipe 6, and as shown in Figure 2, the position, close bottom side of each gas pipe line 2 is provided with air curtain forming portion to the pipeline section figure (bearing end) of nitrogen protection iron runner; The inlet end of gas pipe line 2 is connected with last furnace shell 1 by hinge 7, and the tail end of gas pipe line 2 is supported in iron runner main body 4 by bearing, each gas pipe line 2 is also provided with gas guide mechanism (flow deflector 3).Wherein:
Air curtain forming portion can be single or double equally distributed multiple spray orifice, and the diameter of spray orifice is 8-15mm, and adjacent spray orifice is along the spacing 50-150mm of duct orientation.Spray orifice zero position distance iron notch 0.8-2m, terminates in gas pipe line 2 tail end; Also can be arrange slit 8 along the pipe lengths of gas pipe line 2, the width of slit 8 be 2-5mm, and the zero position distance iron notch 0.8-2m of slit, terminates in gas pipe line 2 tail end.
Gas pipe line fixed mechanism comprises the hinge 7 of the first end (inlet end) being located at gas pipe line 2 and is located at the bearing 5 of the second end (tail end) of gas pipe line 2; Gas pipe line 2 is connected with last furnace shell 1 by hinge 7, and can rotate in the horizontal direction for rotating shaft with hinge 7, for the use later stage at iron runner, when ditch shape changes, by suitably rotating gas pipe line 2 to adapt to ditch deformation, guarantee that nitrogen can be sprayed onto on iron runner inwall effectively.Bearing 5 supports gas pipe line 2, makes it stand on iron runner main body 4;
Pipeline guiding mechanism is flow deflector 3, and flow deflector 3 can be smooth plate or cambered plate, and the surface of flow deflector 3 can also be coated with refractory materials.The material of flow deflector 3 is preferably heat-resistance stainless steel, and its width is 150-300mm, itself and iron runner inner-wall surface angle 20-40 °.
For the iron runner being provided with operculum colpi, the operculum colpi of iron runner nearly skimmer end is closed, and nitrogen is held thus and introduced in operculum colpi; The operculum colpi of nearly iron notch end is semiclosed, and operculum colpi shrouds all or part of of iron runner main body, forms nitrogen container cavity.
The nitrogen protection method of above-mentioned nitrogen protection cleek is specially: first nitrogen enters gas pipe line 2 by inlet pipe 6, the nitrogen entering gas pipe line 2 through near gas pipe line 2 bottom side go out air cleft or spray orifice 8 sprays and forms air curtain, the nitrogen air curtain of ejection is through flow deflector water conservancy diversion, shroud equably inside the furrow bank of iron runner main body, reach the protection to iron runner, this mode of supplying gas of blowing for pipeline; When being provided with operculum colpi, can pass into nitrogen from operculum colpi blind end in operculum colpi, making the nitrogen gas concn in operculum colpi remain on a high level (as more than 95%), reaching the protection to iron runner, this is the mode of supplying gas of ventilation in operculum colpi.
According to the practical situation of engineering site, the technical scheme in the utility model can be adopted flexibly, adopt nitrogen protection iron runner surface, slow down or stop carbon in iron runner material oxidized, realizing the protection to iron runner refractory materials, as:
A kind of mode can be: as shown in Figure 1, in ditch, hot side arranges the pipeline gas injection structure of two-tube two-way along its length, and the mode of being blown by pipeline is supplied gas, and forms nitrogen air curtain, realize the protection to iron runner on iron runner surface.
Another kind of mode can be: for the iron runner being provided with operculum colpi, the first half section (nearly iron notch) as iron runner main body adopts pipeline gas injection structure, and the mode of being jetted by tubular type protects iron runner; Second half section (nearly skimmer) arranges operculum colpi, nitrogen (passing into nitrogen in any way in lid) is passed into toward nitrogen container cavity, the nitrogen gas concn that operculum colpi shrouds part is made to remain on a high level, to slow down or to organize the oxidation of iron runner surface carbon, thus weaken the erosion of slag to refractory materials, play the effect extending iron runner work-ing life; Thus the combined mode of ventilation in the air blowing of employing pipeline and operculum colpi that achieves protects iron runner.
Certainly, also can ventilating mode in operculum colpi be adopted to be protected by whole piece iron runner.
Obviously, this technology can be used on the facilities such as the main Zhigou of blast furnace, Zhigou, slag runner and the residual iron runner similar with iron runner main body (tap drain) Working environment.Can play equally and delay material oxidation, extend the object of material lifetime.
As mentioned above; embodiment of the present utility model is explained; obviously, as long as do not depart from fact inventive point of the present utility model and effect, will be readily apparent to persons skilled in the art distortion, is also all included within protection domain of the present utility model.
Claims (8)
1. a nitrogen protection iron runner, is characterized in that, comprises iron runner main body and pipeline gas injection device, and described pipeline gas injection device comprises gas pipe line, gas pipe line fixed mechanism and gas guide mechanism; Wherein:
Described iron runner main body is connected with last furnace shell, and the furrow bank both sides of described iron runner main body are furnished with described gas pipe line respectively along ditch length direction;
Described gas pipe line is provided with inlet pipe near iron notch end, and described gas pipe line is provided with air curtain forming portion;
Described gas pipe line is connected with described last furnace shell with described iron runner main body respectively by described gas pipe line fixed mechanism, and each described gas pipe line is provided with described gas guide mechanism.
2. nitrogen protection iron runner according to claim 1; it is characterized in that; described air curtain forming portion is be located at multiple spray orifices of described gas pipe line; described spray orifice is single or double layout along gas pipe line direction; the diameter of described spray orifice is 8-15mm; the spacing of adjacent described spray orifice is 50-150mm, and the zero position distance iron notch 0.8-2m of described spray orifice, described spray orifice terminates in gas pipe line tail end.
3. nitrogen protection iron runner according to claim 1; it is characterized in that, described air curtain forming portion is the slit arranged along gas pipe line direction, and the width of described slit is 2-5mm; the zero position distance iron notch 0.8-2m of described slit, described slit terminates in gas pipe line tail end.
4. nitrogen protection iron runner according to claim 1, is characterized in that, described gas pipe line fixed mechanism comprises hinge and bearing, and the first end of described gas pipe line is located at by described hinge, and the second end of described gas pipe line is located at by described bearing; Described gas pipe line is connected with described last furnace shell by described hinge, described gas pipe line with described hinge for rotating shaft is rotated in the horizontal direction, described gas pipe line by described seat supports in described iron runner main body.
5. nitrogen protection iron runner according to claim 1, is characterized in that, described pipeline guiding mechanism is flow deflector, and described flow deflector is smooth plate or cambered plate.
6. nitrogen protection iron runner according to claim 5, is characterized in that, the width of described smooth plate is 150-300mm, and the angle that described smooth plate and iron runner inner-wall surface are formed is 20-40 °.
7. nitrogen protection iron runner according to claim 5, is characterized in that, the surface-coated of described flow deflector has refractory materials.
8. nitrogen protection iron runner according to claim 1; it is characterized in that; the nearly skimmer end of the operculum colpi of described iron runner is set to blind end; the nearly iron notch end of described operculum colpi is set to semiclosed end; described blind end is provided with nitrogen and passes into structure; described operculum colpi shrouds described iron runner main body, forms nitrogen container cavity.
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|---|---|---|---|
| CN201420533067.7U CN204111786U (en) | 2014-09-16 | 2014-09-16 | A kind of nitrogen protection iron runner |
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|---|---|---|---|
| CN201420533067.7U CN204111786U (en) | 2014-09-16 | 2014-09-16 | A kind of nitrogen protection iron runner |
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| CN204111786U true CN204111786U (en) | 2015-01-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104293995A (en) * | 2014-09-16 | 2015-01-21 | 北京联合荣大工程材料有限责任公司 | Nitrogen protection iron runner and nitrogen protection method thereof |
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2014
- 2014-09-16 CN CN201420533067.7U patent/CN204111786U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104293995A (en) * | 2014-09-16 | 2015-01-21 | 北京联合荣大工程材料有限责任公司 | Nitrogen protection iron runner and nitrogen protection method thereof |
| CN104293995B (en) * | 2014-09-16 | 2016-08-17 | 北京联合荣大工程材料有限责任公司 | A kind of nitrogen protection iron runner and nitrogen guard method thereof |
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| GR01 | Patent grant | ||
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Address after: 101400, No. 9, Long Yun Road, Jingwei Industrial Zone, North Housing Town, Huairou District, Beijing Patentee after: Beijing United Rong Da engineering materials Limited by Share Ltd Address before: 101400, No. 9, Long Yun Road, North Housing Development Zone, Huairou District, Beijing Patentee before: Beijing Allied Rongda Engineering Material Co., Ltd. |