CN203595398U - Sealing system of molten drop furnace - Google Patents
Sealing system of molten drop furnace Download PDFInfo
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- CN203595398U CN203595398U CN201320815120.8U CN201320815120U CN203595398U CN 203595398 U CN203595398 U CN 203595398U CN 201320815120 U CN201320815120 U CN 201320815120U CN 203595398 U CN203595398 U CN 203595398U
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- molten drop
- flange
- sealing
- drop stove
- furnace tube
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Abstract
The utility model relates to a sealing system of a molten drop surface. The sealing system comprises a water seal device, a connecting flange and a seal flange, wherein the water seal device comprises an upper steel tube and an annular water tank, the upper steel tube is connected with a graphite seal head, and the annular water tank is fixed to a support of the molten drop furnace through the flange. The radius of the upper steel tube is set between the inner diameter of the annular water tank and the outer diameter of the annular water tank. An annular pit is formed in the inner side of the upper portion of the connecting flange, the connecting flange is connected with a combustion chamber pipe of the molten drop furnace, and a connecting hole of the connecting flange is connected with the side wall of a combustion chamber channel of the molten drop furnace. The inner side of the seal flange is in a stepped type, a first step of the inner side of the seal flange is connected with the lower end of the combustion chamber pipe of the molten drop furnace, a second step of the inner side of the seal flange is connected with a graphite base of the molten drop furnace, an upper connecting hole of the seal flange is connected with a shell of the molten drop furnace, and a lower connecting hole of the seal flange is connected with a material receiving box of the molten drop furnace. The sealing system improves the seal performance of the molten drop furnace.
Description
Technical field
The utility model relates to reduction of iron ore soft heat performance test device, relates in particular to a kind ofly can solve easily the leak gas molten drop stove sealing system of problem of molten drop stove furnace tube junction.
Background technology
Molten drop stove is the device of measuring reduction of iron ore soft heat performance, this device adopts heating reduction loading softening method of testing, the ore effect of the reducing gases of suffered heating cycle, loading system and composition variation from top to bottom in analog blast furnace, reproducibility, the property of softening and the melting drippage property of synthesis measuring ore.
Heat up according to heating schedule control molten drop stove, temperature in thermocouple induction stove, logical N when furnace temperature reaches 500 ℃
2gas protection, is warming up to after 900 ℃ and changes and lead to the carbon monoxide reducing gas and the specimen reaction that contain percent by volume 30%, and light exhaust outlet coal gas, and molten drop stove operating temperature is 900-1550 ℃.
Due to test condition analog blast furnace actual conditions, therefore, measurement result relatively approaches actual.
Softening and the melting drippage characteristic of iron ore, can be evaluated by sample shrinkage factor curve and bed of material air-flow differential curve.Their index has:
T 0, T10---shrinkage factor is 0 and temperature when l0%, represents softening beginning;
Temperature when T40---shrinkage factor is 40%, represents that fusing starts;
Temperature when Ts---differential pressure curve skyrockets suddenly, ℃;
TD---liquid phase starts the temperature of drippage, ℃;
△ Pmax---the maximum differential pressure value in differential pressure curve, kPa;
These indexs are all closely related with the overall air-tightness of molten drop stove.
Existing molten drop stove mainly leaks gas and is a little:
1, molten drop hearthstone China ink seal head and the interchannel sealing of burner hearth
Because each test operation all needs to open molten drop stove, sample enters from molten drop stove top, and existing molten drop stove all adopts graphite grazing head to become sealing device in the form of piston with burner hearth tunnel-shaped; Sealing mode cannot form real tight confined space, air-flow still can be overflowed from the gap between graphite grazing head and burner hearth passage, not only affect result of the test, form potential safety hazard, and graphite grazing head and burner hearth passage all easily adsorb tiny foreign material, cause graphite grazing head in process of the test block and cause experiment to proceed.
2, the sealing between furnace tube upper end and body of heater
Furnace tube operating temperature is higher, and the effect of expanding with heat and contract with cold is extremely strong, must reserved enough spaces between furnace tube epimere and body of heater, and guarantee that furnace tube can free-extension in the time of work, but left like this hidden danger of poorly sealed and gas leak; Sealing between existing furnace tube upper end and body of heater is connected and is realized by flange, between flange and furnace tube gap, fill out encapsulant and coat curing agent, because the effect of expanding with heat and contract with cold of encapsulant and curing agent is asynchronous with furnace tube, very easily occur coming off loosening, cause gas leakage.
3, the sealing between furnace tube lower end and body of heater
Sealing between furnace tube lower end and body of heater is connected and is realized by flange, sealing gasket coat curing agent on the pad between flange and furnace tube and graphite base; Furnace tube operating temperature is higher, and sealing gasket and curing agent, after repeatedly expanding with heat and contract with cold, very easily occur coming off loosening, cause gas leakage, not only affect experimental test result, have also caused potential safety hazard; Meanwhile, in experimentation, air enters and will increase the weight of the oxidation of graphite crucible and graphite base.
Because molten drop stove operating temperature is up to more than 1500 ℃, sealing except between pulp-collecting box and body of heater is in low-temperature space, the sealing of furnace tube and graphite and body of heater is all in high-temperature region, the effect of expanding with heat and contract with cold is stronger, encapsulant easily occurs that loose or dislocation even burns, and this just requires encapsulant to have good hot properties.
In sum, we are in the urgent need to a kind of device that can solve molten drop stove furnace tube junction air-tightness problem, to draw test result accurately.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of molten drop stove sealing system that can solve molten drop stove furnace tube junction air-tightness problem, to guarantee the accuracy of reduction of iron ore soft heat performance test.
The technical scheme that the utility model adopts is: a kind of molten drop stove sealing system, and it comprises water seal arrangement, adpting flange and sealing flange; Described water seal arrangement comprises steel cylinder and annular water tank, and described upper steel cylinder is connected with graphite grazing head, and described annular water tank is fixed on by flange on the support of molten drop stove, and the radius of upper steel cylinder is between the internal diameter and external diameter of annular water tank; Described adpting flange upper inner has circular pit, and described adpting flange is connected with the furnace tube of molten drop stove, and the connecting hole of adpting flange is connected with the sidewall of the burner hearth passage of molten drop stove; The inner side of described sealing flange is notch cuttype, first ladder of sealing flange inner side is connected with the lower end of the furnace tube of molten drop stove, second ladder is connected with the graphite base of molten drop stove, and the upper connecting hole of described sealing flange is connected with the furnace shell of molten drop stove, the lower connecting hole of sealing flange is connected with the pulp-collecting box of molten drop stove.
Press such scheme, between the first ladder of the lower end of described furnace tube and sealing flange, be provided with seal washer.
Press such scheme, between the second ladder of the lower end of described graphite base and sealing flange, be provided with seal washer.
Press such scheme, described seal washer is made up of Zirconium oxide fibre cotton.
Press such scheme, the outside of described sealing flange is notch cuttype.
Press such scheme, the upper surface of described furnace tube is lower than the upper surface of adpting flange.
Press such scheme, between described adpting flange and furnace tube, be provided with encapsulant and curing agent.
Press such scheme, the outside of described adpting flange is notch cuttype.
The problem that the utility model cannot really seal for molten drop stove feed(raw material)inlet place, adopt the way at the water seal of passage outer setting and expansion passage, solve graphite grazing head and burner hearth interchannel and revealed the problem of coal gas, significantly improve the sealing property of molten drop stove burner hearth, eliminated the problem of potential safety hazard and passage jam.
Easily there is the problem of loose or dislocation for the sealing between furnace tube upper end and body of heater in the utility model, adopt the adpting flange with circular pit, in the time that furnace tube expands with heat and contract with cold, not therefore loose or dislocation of encapsulant, has solved the sealing problem between furnace tube upper end and body of heater.
Easily there is the problem of loose or dislocation for the sealing between furnace tube lower end and body of heater in the utility model, adopt stair-stepping sealing flange, two flanges that in the past connected respectively furnace tube and graphite base are merged into a flange, the joint face of flange and body of heater is reduced to 2 by 4, reduce the possibility of furnace tube gas leakage, the possibility that has simultaneously reduced graphite base oxidation, has reduced the consumption of graphite.
Easily there is for the sealing of high-temperature region the problem that loose or dislocation even burns in the utility model, adopts Zirconium oxide fibre cotton to make the seal washer of ring-type, solved the easily problem of damage of high-temperature region encapsulant.
The beneficial effects of the utility model are: in the water seal of passage outer setting, adopt Novel connection acting flange in furnace tube upper end, adopt novel seal flange in furnace tube lower end, be aided with the seal washer that Zirconium oxide fibre cotton is made, significantly improve the sealing property of molten drop stove, eliminated the problem of potential safety hazard and passage jam.The utility model has solved the problem of graphite grazing head and body of heater interchannel leakage coal gas.Extend the cycle of changing graphite base, alleviated labour intensity.Simple in structure, be convenient to promote.The outside design of adpting flange and sealing flange is to notch cuttype, not only saves material, and make installation become convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of molten drop stove.
Fig. 2 is the structural representation of water sealing device.
Fig. 3 is the profile of adpting flange.
Fig. 4 is the profile of sealing flange.
Fig. 5 is the structural representation of seal washer.
Fig. 6 is the use reference diagram of sealing flange and packing ring.
In figure: 1-, depression bar, 2, pressure head, 3, water seal arrangement, 4, adpting flange, 5, exhaust outlet, 6, furnace tube, 7, furnace shell, 8, graphite crucible, 9, graphite base, 10, sealing flange, 11, pulp-collecting box, 12, air intake, 13, burner hearth passage, 14, upper steel cylinder, 15, annular water tank, 16, graphite grazing head, 17, connecting hole, 18, circular pit, 19, upper connecting hole, 20, lower connecting hole, 21, seal washer.
The specific embodiment
Further illustrate embodiment of the present utility model below in conjunction with accompanying drawing.
Comprise depression bar 1-, pressure head 2, exhaust outlet 5, furnace tube 6, furnace shell 7, graphite crucible 8, graphite base 9, pulp-collecting box 11 and air intake 12 referring to Fig. 1, a kind of molten drop stove.
Referring to Fig. 1-Fig. 6, a kind of molten drop stove sealing system, it comprises water seal arrangement 3, adpting flange 4 and sealing flange 10, described water seal arrangement comprises steel cylinder 14 and annular water tank 15, described annular water tank 15 is equipped with water, and the inwall of annular water tank 15 forms burner hearth passage 13; Upper steel cylinder 14 is connected with graphite grazing head 10, and annular water tank 15 is fixed on by flange on the support of molten drop stove; The radius of upper steel cylinder 14, between the internal diameter and external diameter of annular water tank 15, is convenient to, in water that steel cylinder 14 inserts annular water tank 15, form enclosure space; Described adpting flange 4 upper inner have circular pit 18, and adpting flange 4 is connected with the top of the furnace tube 6 of molten drop stove, and the connecting hole 17 of adpting flange 4 is connected with the sidewall of the burner hearth passage 13 of molten drop stove; The inner side of described sealing flange 10 is notch cuttype, first ladder of sealing flange 10 inner sides is connected with the lower end of the furnace tube 5 of molten drop stove, second ladder of sealing flange 10 inner sides is connected with the graphite base 9 of molten drop stove, and the upper connecting hole 19 of sealing flange 10 is connected with the furnace shell 6 of molten drop stove, the lower connecting hole 20 of sealing flange 10 is connected with the pulp-collecting box 11 of molten drop stove.
In the utility model, in order to reach better sealing effectiveness, the seal washer 21 of being made up of Zirconium oxide fibre cotton can be set between furnace tube 6 lower ends and the first ladder of sealing flange 10, the seal washer 21 of being made up of Zirconium oxide fibre cotton is set between the lower end of graphite base 9 and the second ladder of sealing flange 10.
In the utility model, in order to reach better sealing effectiveness, can make the upper surface of furnace tube 6 lower than the upper surface of adpting flange 4, and between adpting flange 4 and furnace tube 6, encapsulant and curing agent are set.
In the utility model, in order to save material and adpting flange 4 and sealing flange 10 to be better installed, notch cuttype can be made in the outside of adpting flange 4 and sealing flange 10.
The utility model installs the steel cylinder of upper and lower interlock additional in depression bar 1 outside, below by double-deck steel cylinder makeup ring shape water tank, annular water tank is welded on the support of molten drop stove, burner hearth passage aligns with furnace tube, top steel cylinder and graphite grazing head link together, in test, upper steel cylinder, along with depression bar declines and declines, when upper steel cylinder touches the water surface in annular water tank, forms sealing system; Expand burner hearth passage simultaneously, in guaranteeing sealing property, eliminated the possibility that graphite grazing head contacts with burner hearth passage, in guarantee test process, graphite grazing head is unobstructed descending.
Adpting flange of the present utility model is on common flange, to process a circular pit, between furnace tube and flange, form an annulus, fill out encapsulant and curing agent in this space, on have the extruding of body of heater, under have lifting of flange pit, encapsulant and curing agent do not expand with heat and contract with cold with furnace tube and loosening.
Sealing flange of the present utility model adopts the mode of ladder on ring flange, and two concentric circular platforms are set, and connects respectively furnace tube and graphite base, and the joint face of flange and body of heater is reduced to 2 by 4, has reduced the possibility of furnace tube gas leakage.
Lower end at furnace tube and graphite base arranges seal washer, and sealing packing ring, for the sealing between furnace tube lower end and body of heater and the sealing between graphite base and body of heater, has improved the sealability of system.
The weight of furnace tube or graphite base compresses seal washer, seal washer do not expand with heat and contract with cold with furnace tube and loose or dislocation also can not burnt by high temperature.This is because Zirconium oxide fibre is a kind of long-term docrystalline oxide refractory fibrous material using under superhigh temperature atmosphere that can meet more than 1600 ℃.Due to itself high-melting-point and other high temperature good characteristic, make Zirconium oxide fibre there is the serviceability temperature higher than other refractory fibres and better heat-proof quality, and high temeperature chemistry stable in properties, and Zirconium oxide fibre cotton can be processed into ring washer easily as required.
Within 2013, the utility model is installed on molten drop stove by Wuhan Iron and Steel Plant research institute, and molten drop stove is again without revealing the descending problem such as not smooth of coal gas and graphite grazing head, more than the system pressure of molten drop stove is brought up to 20kpa.
Claims (8)
1. a molten drop stove sealing system, is characterized in that: it comprises water seal arrangement, adpting flange and sealing flange; Described water seal arrangement comprises steel cylinder and annular water tank, and described upper steel cylinder is connected with graphite grazing head, and described annular water tank is fixed on by flange on the support of molten drop stove, and the radius of upper steel cylinder is between the internal diameter and external diameter of annular water tank; Described adpting flange upper inner has circular pit, and described adpting flange is connected with the furnace tube of molten drop stove, and the connecting hole of adpting flange is connected with the sidewall of the burner hearth passage of molten drop stove; The inner side of described sealing flange is notch cuttype, first ladder of sealing flange inner side is connected with the lower end of the furnace tube of molten drop stove, second ladder is connected with the graphite base of molten drop stove, and the upper connecting hole of described sealing flange is connected with the furnace shell of molten drop stove, the lower connecting hole of sealing flange is connected with the pulp-collecting box of molten drop stove.
2. molten drop stove sealing system as claimed in claim 1, is characterized in that: between the first ladder of the lower end of described furnace tube and sealing flange, be provided with seal washer.
3. molten drop stove sealing system as claimed in claim 1, is characterized in that: between the second ladder of the lower end of described graphite base and sealing flange, be provided with seal washer.
4. molten drop stove sealing system as claimed in claim 2 or claim 3, is characterized in that: described seal washer is made up of Zirconium oxide fibre cotton.
5. as the molten drop stove sealing system of claim 1,2 or 3 as described in arbitrary, it is characterized in that: the outside of described sealing flange is notch cuttype.
6. molten drop stove sealing system as claimed in claim 1, is characterized in that: the upper surface of described furnace tube is lower than the upper surface of adpting flange.
7. molten drop stove sealing system as claimed in claim 1, is characterized in that: between described adpting flange and furnace tube, be provided with encapsulant and curing agent.
8. as the molten drop stove sealing system of claim 1,6 or 7 as described in arbitrary, it is characterized in that: the outside of described adpting flange is notch cuttype.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320815120.8U CN203595398U (en) | 2013-12-12 | 2013-12-12 | Sealing system of molten drop furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320815120.8U CN203595398U (en) | 2013-12-12 | 2013-12-12 | Sealing system of molten drop furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203595398U true CN203595398U (en) | 2014-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320815120.8U Expired - Fee Related CN203595398U (en) | 2013-12-12 | 2013-12-12 | Sealing system of molten drop furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203595398U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268998A (en) * | 2016-09-29 | 2017-01-04 | 山东钢铁股份有限公司 | A kind of iron mine molten drop crucible device |
| CN111707101A (en) * | 2020-06-24 | 2020-09-25 | 中南大学 | Melt and drip stove |
-
2013
- 2013-12-12 CN CN201320815120.8U patent/CN203595398U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268998A (en) * | 2016-09-29 | 2017-01-04 | 山东钢铁股份有限公司 | A kind of iron mine molten drop crucible device |
| CN111707101A (en) * | 2020-06-24 | 2020-09-25 | 中南大学 | Melt and drip stove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170717 Address after: 430083, Gate No. 2, Qingshan District, Hubei, Wuhan Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: Wuhan Iron & Steel (Group) Corp. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140514 Termination date: 20191212 |