CN102305803A - Experiment device and method for studying blast furnace hearth and bottom carbon brick annular crack mechanism - Google Patents
Experiment device and method for studying blast furnace hearth and bottom carbon brick annular crack mechanism Download PDFInfo
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- CN102305803A CN102305803A CN201110130720A CN201110130720A CN102305803A CN 102305803 A CN102305803 A CN 102305803A CN 201110130720 A CN201110130720 A CN 201110130720A CN 201110130720 A CN201110130720 A CN 201110130720A CN 102305803 A CN102305803 A CN 102305803A
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Abstract
The invention relates to an experiment device and an experiment method for studying a blast furnace hearth and bottom carbon brick annular crack mechanism. The experiment device comprises a carbon monoxide generation device, a resistance furnace and tail gas treatment equipment, wherein the carbon monoxide generation device is communicated with the resistance furnace and the tail gas treatment equipment in turn; and a heating device and a sample carbon brick are arranged in the resistance furnace. The specific temperature gradient required by studying the annular crack mechanism is achieved, and temperature distribution is detected in the experiment process, so the sample carbon brick is experimented. By the experiment device and the experiment method, the blast furnace hearth carbon brick annular crack forming process can be simulated, the carbon brick annular crack forming mechanism is analyzed, the effect of alkali metal in the form of a gas phase, solid phase or liquid phase in the carbon brick annular crack process is revealed, and the effect of the temperature gradient in the carbon brick annular crack process is revealed.
Description
Technical field
The present invention relates to a kind of experimental provision and method of studying blast furnace hearth and bottom brick fuel ring crack mechanism, belong to the emtallurgy research technical field.
Technical background
Cupola well brick fuel ring crack is meant that the cupola well brick fuel is corroded seam by a kind of annular and is divided into inside and outside two parts, form erosion seam back and hinder the conduction of cupola well heat, thereby the acceleration brick fuel corrodes, and reduces generation furnace service life.Thereby the ring crack mechanism of cupola well brick fuel is studied is very necessary, help clear and definite in cupola well the origin cause of formation of different circumferential welds, be theoretical support that provide the necessary technical of the technological transformation of cupola well from now on, it is long-lived theoretical to enrich blast furnace.
In the blast furnace hearth and bottom zone be temperature up to 2000 ℃, pressure is up to the environment of 3～4atm; Whole process of production is totally-enclosed form; Its inner condition of production almost can not directly be observed by the external world; When abnormal conditions appear in blast furnace hearth and bottom, be difficult to analyze its reason, give metallargist's problem analysis, deal with problems and cause difficulty.
For a long time, opinions vary always to the origin cause of formation of brick fuel ring crack seam.The blast furnace production practices show that alkaline metal and zinc are to destroy brick fuel, make its main cause that forms the ring crack seam, but very not clear and definite to its erosion mechanism.Domestic and foreign literature had report at alkaline metal aspect the harm of blast furnace; Part report lays particular emphasis on alkaline metal circulation enrichment Study on Theory; Part report lays particular emphasis on alkaline metal to blast furnace crude fuel Effect on Performance; A part lays particular emphasis on the erosion of alkaline metal to the sa fire resistive material; Also there is document that the composition in the blast furnace crucibe ring crack seam is detected and analyzes; But all can accurately simulate the cupola well internal environment, more not disclose the formation reason that alkaline metal causes the brick fuel ring crack through experiment contrast to brick fuel less than relevant experimental provision.
Summary of the invention
In order to overcome the deficiency of prior art; The present invention provides a kind of experimental provision of simple and easy to do research blast furnace hearth and bottom brick fuel ring crack mechanism; The present invention also provides a kind of method of utilizing above-mentioned experimental provision to experimentize; With collection correlation technique data, and binding data is analyzed the circumferential weld origin cause of formation of blast furnace crucibe brick fuel.The present invention not only can analog blast furnace cupola well brick fuel the ring crack process, and a cover experimental provision can realize the kinds of experiments function, is convenient to analyze the multiple technologies problem.
Summary of the invention:
Facts have proved: the pressure of blast furnace crucibe is about 3 atmospheric pressures; Stove steel liquid steel temperature is about about 1550 ℃, and the interior temperature of brick fuel ring crack seam that occurs near the position about furnace shell 400mm is 800～900 ℃; With brick fuel ring crack seam is the boundary, and the brick fuel of ring crack both sides still remains intact, and brick fuel destroys fully in the ring crack seam; The intact brick fuel in ring crack both sides characterized respectively be higher than 900 ℃ be lower than 800 ℃ of temperature ranges; Through the material in the ring crack seam is carried out chemical composition analysis, be not difficult to find, there are many alkali metal oxides.Based on practical data, introduce alkaline metal potassium in the experimental technique of the present invention, make its one of environmental factor in the analog blast furnace cylinder in experimentation: the alkaline metal factor.
Based on the analytic solution of carat Pei Long-Clausius equation, when environmental pressure was 1.5atm～3.5atm, the boiling point of potassium was about 800～900 ℃, exceeds 50～150 ℃ than the potassium boiling point under the normal pressure (759 ℃).When environment temperature was higher than 900 ℃, the potassium metal was a gaseous state, and when environment temperature was lower than 800 ℃, the potassium metal was a solid state.In conjunction with facts have proved, gaseous state potassium and solid-state potassium all can not destroy brick fuel under the blast furnace environment, and there is the possibility of destroying brick fuel in liquid potassium.Therefore can simulate the environment in the cupola well, utilize alkaline metal potassium and brick fuel to experimentize just to have become to study the main path of the ring crack mechanism of cupola well brick fuel.
Thermodynamic analysis confirm to have only in the blast furnace crucibe potassium vapor can stable existence (compound of potassium can not stable existence), so the present invention earlier through the temperature in the controlling resistance stove, make the potassium metal volatilize potassium vapor, with the environment in the analog blast furnace cupola well; Then with the temperature stabilization in the resistance furnace at 800～900 ℃, scattered potassium steam becomes liquid state once more, obtains liquid potassium through experiment and makes the cupola well brick fuel form the vaild evidence of ring crack.
The chemical reaction that takes place in the resistance furnace:
(a) K
(s)=K
(g)(in depositing the crucible of potassium, taking place); K
(g)=K
(l)(in the potassium vapor diffusion admittance, taking place)
(b)2K
(l)+CO＝K
2O+C；
(c)2K
(l)+3CO＝K
2CO
3+2C。
Detailed Description Of The Invention:
Concrete technical scheme of the present invention is following,
A kind of experimental provision of studying blast furnace hearth and bottom brick fuel ring crack mechanism; It is characterized in that; It comprises carbon monoxide generating means, resistance furnace and tail gas treatment device; The carbon monoxide generating means links to each other with the air intake opening of resistance furnace; The gas outlet of resistance furnace links to each other with tail gas treatment device, and heating arrangement and sample brick fuel are arranged in the described resistance furnace;
Described sample brick fuel appearance profile is a rectangular parallelepiped, and its physical dimension is (350～400) mm * (100～200) mm * (150～200) mm (length * wide * height); A rectangular parallelepiped cavity is arranged at sample brick fuel top, and its physical dimension is (250～350) mm * (50～80) mm * (40～60) mm, and a gland bonnet that adapts with its physical dimension is set in this cavity.In said sealing cap aside 3
through hole, carbon brick wall in the sample set aside a
through hole, through holes are installed with a thermocouple.In above several position thermopair is installed, effect is for the temperature of monitoring sample brick fuel in real time, and with resistance furnace and heating arrangement associating temperature adjustment, guarantee the temperature environment that the analog blast furnace cupola well is interior.
It is coupled logical below described rectangular parallelepiped cavity, to be provided with diffusion admittance, and its physical dimension is (250～300) mm * (50～80) mm * (40～60) mm.The effect that diffusion admittance is set is that guiding gaseous state potassium evenly spreads, and prepares for follow-up simulation brick fuel is subjected to the corrosion of liquid potassium.
It is coupled logical that the crucible groove is set below described diffusion admittance, and its physical dimension is (100～150) mm * (40～50) mm * (40～50) mm, and its length direction is parallel with the Width of diffusion admittance.The purpose that the crucible groove is set is to be used for holding solid potassium metal in order in groove, to place crucible.
Be provided with 2～3 air holes in the bottom of described crucible groove and be communicated with crucible groove and sample brick fuel outside, the profile of air hole is a diameter: (10～20) mm, height: (30～40) mm's is cylindrical.The effect of the air hole of crucible trench bottom setting is to supply CO gas turnover sample brick fuel, in the sample brick fuel, builds the blast furnace crucibe environment.
Preferably, also the material with the sample brick fuel is identical for the material of described gland bonnet.
Preferably, described heating arrangement is positioned at the bottom of sample brick fuel, and heating arrangement is an electric resistance heater.Adopting electric resistance heater is in order to regulate the temperature in the resistance furnace at any time accurately, the environment temperature in the accurate analog blast furnace cupola well.
Utilize the method for above-mentioned experimental provision research blast furnace hearth and bottom brick fuel ring crack mechanism, step is following:
1) choose a fissureless sample brick fuel in surface and place resistance furnace to toast, baking temperature is 105～115 ℃, and stoving time is 22～24h;
2) empty stove experiment: the air intake opening of opening resistor stove and gas outlet; In resistance furnace, feed CO gas; The flow of CO gas is 16～35 liters/min; Ventilate and close the gas outlet of resistance furnace after 3 minutes; Continuation feeds CO gas to resistance furnace; When the air pressure of CO gas in the resistance furnace reaches 3～4 atmospheric pressure, close the air intake opening of resistance furnace; Heating arrangement in the opening resistor stove heats the sample brick fuel, when temperature in the stove reaches 800 ℃, keeps this temperature 60 minutes; Continue heating, when temperature in the stove reaches 1000 ℃, kept this temperature 60 minutes, the temperature of 4 thermopairs of brick fuel Temperature Distribution measured in record, in order to follow-up resistance furnace temperature adjustment; After heating finishes, take out the sample brick fuel, new crack occurs, numbered mark, take pictures in the new crack that occurs on the sample brick fuel like the sample brick fuel; The electric thermo-couple temperature of record crack institute correspondence position, directly the fracture to the crack carries out morphology analysis.Here, only feed CO and do not put into metallic potassium, its purpose be exactly distinguish thermal stress, mechanical stress causes rupturing and potassium corrodes the difference that causes fracture, does contrast test with the alkaline metal corrosion crack that forms in the step 6).
3) get a fissureless sample brick fuel in surface in addition, place solid potassium metal within it in the crucible groove of portion, the quality of solid potassium metal is 0.1-0.6kg; The sample brick fuel is put into resistance furnace; The air intake opening of opening resistor stove and gas outlet; CO gas feeds resistance furnace through air intake opening; The flow of CO gas is 16～35 liters/min; Ventilate and close the gas outlet of resistance furnace after 3 minutes; Continuation feeds CO gas to resistance furnace, when the air pressure of CO gas in the resistance furnace reaches 3～4 atmospheric pressure, closes the air intake opening of resistance furnace;
4) heating arrangement in the opening resistor stove heats the sample brick fuel, when temperature in the stove is between 800～900 ℃, keeps this heated condition 70-74h;
5) Remove the sample carbon brick, as no new cracks in the diffusion layer at the bottom of the bottom and the closure cap carve artificial cracks and the position of the thermocouple is set corresponding to the position, (described here corresponds to the means nearest the corresponding thermocouple and thermocouple fractures and cracks, so that cracks in the recording when the corresponding thermocouple, thermocouple, and according to the position relationship between fracture correspondence) crack width of 1 ~ 2mm, fracture orientation the sample width direction carbon bricks, open resistance furnace heating means for heating the sample carbon bricks, when the furnace temperature is between 800 ~ 900 ℃, maintaining the heated state 94 ~ 98h; any new cracks , proceed to step 6);
6) the sample brick fuel is cooled to room temperature after, the crack is carried out XRD analysis, fracture apperance analysis and is recorded in the electric thermo-couple temperature of when heating crack institute correspondence position.
Interpretation; The sample brick fuel is corroded the criterion forms ring crack by liquid potassium: during fracture that (1) sample brick fuel is caused by thermal stress, do not have other filling material in the middle of the crack, and break to form afterwards mechanical stress or thermal stress discharges rapidly; Sample can not produce other crack, so the crack is narrower.When sample causes fracture by the liquid potassium erosion, tangible metamorphic layer and sediment are arranged between the crack, this point can distinguish that intuitively mechanical breaking, thermal stress fracture form rupture different with the alkali erosion on experimental result; (2) if the abnormal deposition thing is arranged at the place, crack; Through the sediment of XRD analysis at the place, crack; If sediment is unsetting charcoal and kali or sal tartari (sediment of actual blast furnace ring crack seam is consistent); Confirming then that the crack is corroded by liquid potassium causes, and the fracture that thermal stress or mechanical stress cause does not have sediment.
Terminological interpretation:
XRD analysis: through material is carried out X-ray diffraction, analyze its diffracting spectrum, the research means of information such as the structure of composition, material internal atom or the molecule of acquisition material or form.
The present invention can analog blast furnace cupola well brick fuel ring crack forming process; Help analyzing the formation mechanism of brick fuel ring crack; Help disclosing alkaline metal with gas phase, solid phase, liquid phase role in brick fuel ring crack process, help disclosing thermograde in brick fuel ring crack process role.
Description of drawings
Fig. 1 is the perspective view of sample brick fuel;
Fig. 2 is the structural representation of sample brick fuel when not having gland bonnet;
Experimental provision shown in Fig. 1-2 mainly comprises: 1, crucible groove; 2, diffusion admittance; 3, the rectangular parallelepiped cavity at sample brick fuel top; 4, air hole; 5, thermopair; 6, gland bonnet.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further, but is not limited thereto.
Embodiment 1,
A kind of experimental provision of studying blast furnace hearth and bottom brick fuel ring crack mechanism; It is characterized in that; It comprises carbon monoxide generating means, resistance furnace and tail gas treatment device; The carbon monoxide generating means links to each other with the air intake opening of resistance furnace; The gas outlet of resistance furnace links to each other with tail gas treatment device, and heating arrangement and sample brick fuel are arranged in the described resistance furnace;
Described sample brick fuel appearance profile is a rectangular parallelepiped, and its physical dimension is 350mm * 100mm * 150mm (length * wide * height); A rectangular parallelepiped cavity 3 is arranged at sample brick fuel top, and its physical dimension is 300mm * 50mm * 40mm, and a gland bonnet 6 that adapts with its physical dimension is set in this cavity 3.
6 in said closure cap aside 3
through hole, carbon brick wall in the sample set aside a
through hole, through hole mounting a thermocouple 5 respectively.In above several position thermopair is installed, effect is for the temperature of monitoring sample brick fuel in real time, and with resistance furnace and heating arrangement associating temperature adjustment, guarantee the temperature environment that the analog blast furnace cupola well is interior.
It is coupled logical below described rectangular parallelepiped cavity 3, to be provided with diffusion admittance 2, and its physical dimension is 250mm * 50mm * 40mm.The effect that diffusion admittance 2 is set is that guiding gaseous state potassium evenly spreads, and prepares for follow-up simulation brick fuel is subjected to the corrosion of liquid potassium.
It is coupled logical that crucible groove 1 is set below described diffusion admittance 2, and its physical dimension is 100mm * 50mm * 40mm, and its length direction is parallel with the Width of diffusion admittance 2.The purpose that crucible groove 1 is set is to be used for holding solid potassium metal in order in groove, to place crucible.
Be provided with 3 air holes 4 in the bottom of described crucible groove 1 and be communicated with crucible groove 1 and sample brick fuel outside, the profile of air hole 4 is diameter: 10mm, and height: 30mm's is cylindrical.The effect of the air hole 4 that crucible groove 1 bottom is provided with is to supply CO gas turnover sample brick fuel, in the sample brick fuel, builds the blast furnace crucibe environment.
Preferably, also the material with the sample brick fuel is identical for the material of described gland bonnet 6.
Preferably, described heating arrangement is positioned at the bottom of sample brick fuel, and heating arrangement is an electric resistance heater.Adopting electric resistance heater is in order to regulate the temperature in the resistance furnace at any time accurately, the environment temperature in the accurate analog blast furnace cupola well.
Utilize the method for the experimental provision research blast furnace hearth and bottom brick fuel ring crack mechanism of embodiment 1, step is following:
Charge into nitrogen in the experiment forward resistance stove, its purpose is, gets rid of unnecessary oxygen in the stove.
1) choose a fissureless sample brick fuel in surface and place resistance furnace to toast, baking temperature is 105～115 ℃, and stoving time is 22～24h;
2) empty stove experiment: the air intake opening of opening resistor stove and gas outlet; In resistance furnace, feed CO gas; The flow of CO gas is 16～35 liters/min; Ventilate and close the gas outlet of resistance furnace after 3 minutes; Continuation feeds CO gas to resistance furnace; When the air pressure of CO gas in the resistance furnace reaches 3～4 atmospheric pressure, close the air intake opening of resistance furnace; Heating arrangement in the opening resistor stove heats the sample brick fuel, when temperature in the stove reaches 800 ℃, keeps this temperature 60 minutes; Continue heating, when temperature in the stove reaches 1000 ℃, kept this temperature 60 minutes, the temperature of 4 thermopairs of brick fuel Temperature Distribution measured in record, in order to follow-up resistance furnace temperature adjustment; After heating finishes, take out the sample brick fuel, new crack occurs, numbered mark, take pictures in the new crack that occurs on the sample brick fuel like the sample brick fuel; The electric thermo-couple temperature of record crack institute correspondence position, directly the fracture to the crack carries out morphology analysis.Here, only feed CO and do not put into metallic potassium, its purpose be exactly distinguish thermal stress, mechanical stress causes rupturing and potassium corrodes the difference that causes fracture, does contrast test with the alkaline metal corrosion crack that forms in the step 6).
3) get a fissureless sample brick fuel in surface in addition, place solid potassium metal within it in the crucible groove of portion, the quality of solid potassium metal is 0.1-0.6kg; The sample brick fuel is put into resistance furnace; The air intake opening of opening resistor stove and gas outlet; CO gas feeds resistance furnace through air intake opening; The flow of CO gas is 16～35 liters/min; Ventilate and close the gas outlet of resistance furnace after 3 minutes; Continuation feeds CO gas to resistance furnace, when the air pressure of CO gas in the resistance furnace reaches 3～4 atmospheric pressure, closes the air intake opening of resistance furnace;
4) heating arrangement in the opening resistor stove heats the sample brick fuel, when temperature in the stove is between 800～900 ℃, keeps this heated condition 70-74h;
5) Remove the sample carbon brick, as no new cracks in the diffusion layer at the bottom of the bottom and the closure cap carve artificial cracks and the position of the thermocouple is set corresponding to the position, (described here corresponds to the means nearest the corresponding thermocouple and thermocouple fractures and cracks, so that cracks in the recording when the corresponding thermocouple, thermocouple, and according to the position relationship between fracture correspondence) crack width of 1 ~ 2mm, fracture orientation the sample width direction carbon bricks, open resistance furnace heating means for heating the sample carbon bricks, when the furnace temperature is between 800 ~ 900 ℃, maintaining the heated state 94 ~ 98h; any new cracks , proceed to step 6);
6) the sample brick fuel is cooled to room temperature after, the crack is carried out XRD analysis, fracture apperance analysis and is recorded in the electric thermo-couple temperature of when heating crack institute correspondence position.
Interpretation; The sample brick fuel is corroded the criterion forms ring crack by liquid potassium: during fracture that (1) sample brick fuel is caused by thermal stress, do not have other filling material in the middle of the crack, and break to form afterwards mechanical stress or thermal stress discharges rapidly; Sample can not produce other crack, so the crack is narrower.When sample causes fracture by the liquid potassium erosion, tangible metamorphic layer and sediment are arranged between the crack, this point can distinguish that intuitively mechanical breaking, thermal stress fracture form rupture different with the alkali erosion on experimental result; (2) if the abnormal deposition thing is arranged at the place, crack; Through the sediment of XRD analysis at the place, crack; If sediment is unsetting charcoal and kali or sal tartari (sediment of actual blast furnace ring crack seam is consistent); Confirming then that the crack is corroded by liquid potassium causes, and the fracture that thermal stress or mechanical stress cause does not have sediment.
Like embodiment 1 described experimental provision, difference is, the physical dimension of described sample brick fuel: 400mm * 150mm * 200mm; Sample brick fuel top is provided with a rectangular parallelepiped cavity, and specification is 350mm * 70mm * 60mm.
Below described rectangular parallelepiped cavity, be provided with diffusion admittance, its specification is 300mm * 70mm * 60mm.
The specification of crucible groove is 100mm * 40mm * 40mm, and the profile of air hole 4 is diameter: 10mm, and height: 40mm's is cylindrical.
Like embodiment 1 described experimental provision, difference is, the physical dimension of described sample brick fuel: 300mm * 150mm * 150mm; Sample brick fuel top is provided with a rectangular parallelepiped cavity, and specification is 270mm * 70mm * 40mm.
Below described rectangular parallelepiped cavity, be provided with diffusion admittance, its specification is 250mm * 70mm * 40mm.
The specification of crucible groove is 100mm * 40mm * 40mm.
Claims (4)
1. experimental provision of studying blast furnace hearth and bottom brick fuel ring crack mechanism; It is characterized in that; It comprises carbon monoxide generating means, resistance furnace and tail gas treatment device; The carbon monoxide generating means links to each other with the air intake opening of resistance furnace; The gas outlet of resistance furnace links to each other with tail gas treatment device, and heating arrangement and sample brick fuel are arranged in the described resistance furnace;
Described sample brick fuel appearance profile is a rectangular parallelepiped, and its physical dimension is (350～400) mm * (100～200) mm * (150～200) mm; A rectangular parallelepiped cavity is arranged at sample brick fuel top, and its physical dimension is (250～350) mm * (50～80) mm * (40～60) mm, and a gland bonnet that adapts with its physical dimension is set in this cavity;
In said sealing cap aside 3
through hole, carbon brick wall in the sample set aside a
through hole, through holes were installed with a thermocouple;
It is coupled logical below described rectangular parallelepiped cavity, to be provided with diffusion admittance, and its physical dimension is (250～300) mm * (50～80) mm * (40～60) mm;
It is coupled logical that the crucible groove is set below described diffusion admittance, and its physical dimension is (100～150) mm * (40～50) mm * (40～50) mm, and its length direction is parallel with the Width of diffusion admittance;
Be provided with 2～3 air holes in the bottom of described crucible groove and be communicated with crucible groove and sample brick fuel outside, the profile of air hole is a diameter: (10～20) mm, height: (30～40) mm's is cylindrical.
2. experimental provision as claimed in claim 1 is characterized in that, the material of the described gland bonnet also material with the sample brick fuel is identical.
3. experimental provision as claimed in claim 1 is characterized in that described heating arrangement is positioned at the bottom of sample brick fuel, and heating arrangement is an electric resistance heater.
4. utilize the method for the described experimental provision research of claim 1 blast furnace hearth and bottom brick fuel ring crack mechanism, step is following:
1) choose a fissureless sample brick fuel in surface and place resistance furnace to toast, baking temperature is 105～115 ℃, and stoving time is 22～24h;
2) empty stove experiment: the air intake opening of opening resistor stove and gas outlet; In resistance furnace, feed CO gas; The flow of CO gas is 16～35 liters/min; Ventilate and close the gas outlet of resistance furnace after 3 minutes; Continuation feeds CO gas to resistance furnace; When the air pressure of CO gas in the resistance furnace reaches 3～4 atmospheric pressure, close the air intake opening of resistance furnace; Heating arrangement in the opening resistor stove heats the sample brick fuel, when temperature in the stove reaches 800 ℃, keeps this temperature 60 minutes; Continue heating, when temperature in the stove reaches 1000 ℃, kept this temperature 60 minutes, the temperature of 4 thermopairs of brick fuel Temperature Distribution measured in record, in order to follow-up resistance furnace temperature adjustment; After heating finishes, take out the sample brick fuel, new crack occurs, numbered mark, take pictures in the new crack that occurs on the sample brick fuel like the sample brick fuel; The electric thermo-couple temperature of record crack institute correspondence position, directly the fracture to the crack carries out morphology analysis;
3) get a fissureless sample brick fuel in surface in addition, place solid potassium metal within it in the crucible groove of portion, the quality of solid potassium metal is 0.1-0.6kg; The sample brick fuel is put into resistance furnace; The air intake opening of opening resistor stove and gas outlet; CO gas feeds resistance furnace through air intake opening; The flow of CO gas is 16～35 liters/min; Ventilate and close the gas outlet of resistance furnace after 3 minutes; Continuation feeds CO gas to resistance furnace, when the air pressure of CO gas in the resistance furnace reaches 3～4 atmospheric pressure, closes the air intake opening of resistance furnace;
4) heating arrangement in the opening resistor stove heats the sample brick fuel, when temperature in the stove is between 800～900 ℃, keeps this heated condition 70-74h;
5) take out the sample brick fuel; As there is not a newly-increased crack; Then carve the crack in diffusion layer bottom and gland bonnet bottom manual work; The position in crack is corresponding with the position that is provided with at thermopair; The width in crack is 1～2mm, and fracture orientation is consistent with the Width of sample brick fuel, and the heating arrangement in the opening resistor stove heats the sample brick fuel; When temperature in the stove is between 800～900 ℃, keep heated condition 94～98h; If any newly-increased crack, directly carry out step 6);
6) the sample brick fuel is cooled to room temperature after, the crack is carried out XRD analysis, fracture apperance analysis and is recorded in the electric thermo-couple temperature of when heating crack institute correspondence position.
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|---|---|---|---|
| CN 201110130720 CN102305803B (en) | 2011-05-19 | 2011-05-19 | Experiment device and method for studying blast furnace hearth and bottom carbon brick annular crack mechanism |
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| CN102305803B CN102305803B (en) | 2013-04-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181188A (en) * | 2014-08-14 | 2014-12-03 | 江苏科技大学 | Device and method for testing influence of sub-dry type cooling condition on surface quality of material |
| CN109536877A (en) * | 2018-12-29 | 2019-03-29 | 河南中汇新材科技有限公司 | The dedicated charging tray support of nitriding furnace for increasing nitriding furnace working efficiency |
| CN109780870A (en) * | 2018-12-29 | 2019-05-21 | 河南中汇新材科技有限公司 | It is paved on the level land all-in-one oven brick of Bottom of Heating Furnace |
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| JPS53126007A (en) * | 1977-04-12 | 1978-11-02 | Shinagawa Refractories Co | Method of laying firebricks |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181188A (en) * | 2014-08-14 | 2014-12-03 | 江苏科技大学 | Device and method for testing influence of sub-dry type cooling condition on surface quality of material |
| CN109536877A (en) * | 2018-12-29 | 2019-03-29 | 河南中汇新材科技有限公司 | The dedicated charging tray support of nitriding furnace for increasing nitriding furnace working efficiency |
| CN109780870A (en) * | 2018-12-29 | 2019-05-21 | 河南中汇新材科技有限公司 | It is paved on the level land all-in-one oven brick of Bottom of Heating Furnace |
| CN109536877B (en) * | 2018-12-29 | 2023-09-01 | 河南诺兰特新材科技有限公司 | Material tray support special for nitriding furnace for increasing working efficiency of nitriding furnace |
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| CN102305803B (en) | 2013-04-24 |
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