CN101962696B - Method for blowing furnace washing agent by using air inlet of blast furnace - Google Patents
Method for blowing furnace washing agent by using air inlet of blast furnace Download PDFInfo
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- CN101962696B CN101962696B CN 201010525647 CN201010525647A CN101962696B CN 101962696 B CN101962696 B CN 101962696B CN 201010525647 CN201010525647 CN 201010525647 CN 201010525647 A CN201010525647 A CN 201010525647A CN 101962696 B CN101962696 B CN 101962696B
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000007664 blowing Methods 0.000 title abstract description 7
- 238000005406 washing Methods 0.000 title abstract 8
- 239000000843 powder Substances 0.000 claims abstract description 93
- 239000002893 slag Substances 0.000 claims abstract description 60
- 239000003245 coal Substances 0.000 claims abstract description 47
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical group [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 41
- 239000010436 fluorite Substances 0.000 claims abstract description 40
- 239000000203 mixture Substances 0.000 claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000009825 accumulation Methods 0.000 claims abstract description 14
- 239000010439 graphite Substances 0.000 claims abstract description 13
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 13
- 239000002817 coal dust Substances 0.000 claims abstract description 12
- 238000002347 injection Methods 0.000 claims description 47
- 239000007924 injection Substances 0.000 claims description 47
- 239000000571 coke Substances 0.000 claims description 37
- 230000008569 process Effects 0.000 claims description 27
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 26
- 229910052748 manganese Inorganic materials 0.000 claims description 26
- 239000011572 manganese Substances 0.000 claims description 26
- 230000004907 flux Effects 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 208000011580 syndromic disease Diseases 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 abstract 7
- 229910001655 manganese mineral Inorganic materials 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 238000009826 distribution Methods 0.000 description 11
- 230000003068 static effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 7
- 235000012771 pancakes Nutrition 0.000 description 7
- 230000035699 permeability Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000003034 coal gas Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VASIZKWUTCETSD-UHFFFAOYSA-N oxomanganese Chemical compound [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- -1 and many places Substances 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
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- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The invention discloses a method for blowing a furnace washing agent by using the air inlet of a blast furnace, and aims to rapidly solve the problems of adhesion on the lower part of the blast furnace and hearth accumulation. The method comprises the following steps of: feeding high-pressure fluidized furnace washing agent powder into a coal dust blowing pipeline according to the proportion; and blowing the furnace washing agent powder and the coal dust into the hearth of the blast furnace together from the air inlet by a blast furnace coal blowing device, wherein 2.0 to 15kg of the furnace washing agent is added into one ton of Fe; and the furnace washing agent powder is fluorite powder, manganese mineral powder or mixture of the two. In the method of the invention, the furnace washing agent and the coal dust are blown into the furnace together from the air inlet of the blast furnace, so that the furnace washing agent directly acts on a high-viscosity slag accumulation part; and by improving the fluidity of the slag and reacting the slag with graphite carbon, the adhesion of the slag to the furnace wall on the lower part and the hearth accumulation are reduced and eliminated, the hearth center is activated, and proper operation furnace profile is maintained.
Description
Technical field
The present invention relates to a kind of ironmaking technology, particularly utilize the blast-furnace tuyere device antiscales of in blast furnace, jetting, eliminate the method that bottom house bonding and cupola well are piled up, genus smelting iron and steel technical field.
Background technology
The blast furnace ironmaking process; Because the slag viscosity is big; Cooling intensity does not match with it; Cause bottom house slag bonding furnace wall (as shown in Figure 1), or (like Fig. 2, shown in Figure 3) piled up in the too high slag property accumulation that causes of the accumulation of slag iron property, basicity of slag that causes because of the temperature of the furnace hearth deficiency, the graphite that the high Basicity Operation of high silicon causes.Because furnace wall bonding and cupola well are piled up and had influence on the rational operation type of furnace, and then have influence on the distribution of coal gas stream, the furnace condition disorder that causes.The treatment process that the problems referred to above are traditional is to add antiscales in blast furnace edge to carry out prepurging, and adopts concentrated clean Jiao that adds, and cooperates low basicity slag making, eliminates bonding and eliminates accumulation.This method shortcoming is following: in the starting stage that cohesive zone forms; Antiscales gets into first slag, and is the purpose that reaches the prepurging slag, and many places, cloth position are in the blast furnace edge; Influenced by the interior interactional ununiformity of furnace charge of stove, cause it upwards to have ununiformity in blast furnace week.Be formed at the middle slag of cohesive zone bottom; Via the coke slit, finally come together in cupola well, the effect that reduces the slag viscosity is embodied in cohesive zone self and dropping zone position comparatively significantly; But the bigger slag of viscosity for center in the bottom bonding that has existed, the cupola well; And graphite is piled up and action effect is limited, and the smelting cycle nearly that lags behind action time, is difficult to play the purpose of enlivening cupola well.
Summary of the invention
The present invention be used to overcome the defective of prior art and provide a kind of action time piece, effectively eliminate the blast-furnace tuyere winding-up antiscales method that bottom house bonding and cupola well are piled up.
The alleged problem of the present invention is solved by following technical scheme:
A kind of blast-furnace tuyere winding-up antiscales method; Its special feature is: will allocate the coal injection pipeline in proportion into through high pressure fluidizing antiscales powder; Through the pulverized coal injection device antiscales powder is sprayed in the blast furnace hearth by the air port with coal dust, said antiscales adding proportion is 2.0～15kg/tFe, and said antiscales powder is the mixture of fluorite powder, manganese ore powder or said two devices; Requiring antiscales powder degree is-200 orders>40%, greater than 80 orders < 5%.
Above-mentioned blast-furnace tuyere winding-up antiscales method; It is specific as follows to spray into method according to the conditions of blast furnace antiscales: eliminate furnace wall bottom bonding and adopt winding-up fluorite powder to handle; Fluorite powder straying quatity is 2.0-5kg/tFe; The binary basicity of slag of the ore of being packed into by furnace roof, flux, coke and coal injection decision is controlled at 1.05-1.10, jets to return to normal level to the cooling wall temperature and end; Eliminate cupola well and pile up and adopt winding-up fluorite powder to handle, fluorite powder straying quatity press 5-10kg/tFe, and the binary basicity of slag of ore, flux, coke and the coal injection decision of being packed into by furnace roof is controlled at 1.02-1.12, jet to the acceptable normal air quantity of blast furnace only; Eliminate the graphite accumulation that the high Basicity Operation of high silicon causes; Adopt winding-up manganese ore powder or winding-up manganese ore powder and fluorite powder mixture to handle; Winding-up manganese ore powder winding-up amount is pressed 10-15kg/tFe; The binary basicity of slag of the ore of being packed into by furnace roof, flux, coke and coal injection decision is controlled at 1.00-1.05, jets to return to normal level to the acceptable air quantity of blast furnace and end; Winding-up manganese ore powder and fluorite powder mixture winding-up amount are pressed 10-15kg/tFe; The binary basicity of slag that ore, flux, coke and the coal injection of being packed into by furnace roof determines is controlled at 1.03-1.07; The ratio of manganese ore powder is 50%-80% in the mixture, jets to return to normal level to the acceptable air quantity of blast furnace and end.
Above-mentioned blast-furnace tuyere winding-up antiscales method, winding-up antiscales process coal injection inlet pressure >=blast-furnace hot-air pressure 0.08 Mpa; Winding-up antiscales powder at the pressure >=coal injection of coal powder injection divider front end at coal powder injection divider inlet forefront pressure 0.03-0.08Mpa.
Above-mentioned blast-furnace tuyere winding-up antiscales method is characterized in that: winding-up antiscales process, and according to antiscales addition 1Kg/tFe, corresponding raising wind-warm syndrome 4 oC; Or antiscales addition 1Kg/tFe, improve 1 ‰ air blast oxygen level, improve comprehensive coke ratio 0.8 Kg/tFe simultaneously.
The present invention is directed to the blast furnace furnace roof with addition of the traditional method of antiscales or flux prepurging slag lag behind action time one more than the smelting cycle, action effect relatively slowly problem improve; Pulverized coal injection divider front end in proportion in coal injection with addition of the antiscales powder; From blast-furnace tuyere antiscales and coal dust are jetted in the lump in stove, make antiscales directly act on high viscosity slag and accumulation position, through improving slag fluidity; And react with the graphite charcoal; Reduction is also eliminated slag bonding, the cupola well of bottom furnace wall is piled up, and enlivens the cupola well center, keeps the rational operation type of furnace.Have the following advantages with existing compared with techniques: 1. the simple coal injection of more former blast-furnace tuyere can reach the purpose of enlivening the cupola well center more; 2. more former in blast furnace edge the prepurging method with addition of antiscales and flux, action time is fast, slag composition is more even; 3. can be directed against the different working of a furnaces, adopt injection method flexibly, reach reduction slag melting temperature, improve slag fluidity, eliminate the purpose that cupola well is piled up.
Description of drawings
Fig. 1 is a bottom house bonding synoptic diagram;
Fig. 2 is that synoptic diagram is piled up at the cupola well edge;
Fig. 3 is that synoptic diagram is piled up at the cupola well center;
Fig. 4 is the present invention's antiscales synoptic diagram of jetting.
Label is represented as follows in the accompanying drawing: 1. blast furnace; 2. air port; 3. the bottom bonds; 4. the edge is piled up; 5. pile up at the center; 6. antiscales stores up the powder jar; 7. antiscales powder spraying pot; 8. mixing tank; 9. coal powder injection divider; 10. blast furnace air inlet straight tube; 11. coal dust pipeline; 12. source of the gas.
Embodiment
Referring to Fig. 4; Antiscales storage powder jar 6, antiscales powder spraying pot 7 and the source of the gas 12 of the present invention through being provided with; The coal dust that the antiscales powder is carried at coal powder injection divider 9 and coal dust pipeline 11 through mixing tank 8 mixes, via the pulverized coal injection device with antiscales with coal dust by blast furnace air inlet straight tube 10 in the air port sprays into blast furnace hearth, wind speed and the blast energy of flow velocity and the kinetic energy that utilizes pulverized coal injection during, the characteristic of impelling zone of combustion to develop in depth much larger than full coke for smelting; Under the prerequisite that initially the coal gas generating capacity is constant; Make liquid fluorite affact the dead material district at blast furnace center to the center depth, add blowing device along the circumferential uniform distribution of blast furnace, the homogeneity that acts on cupola well is guaranteed; Can reach the rapid dilution slag, enliven the dp at cupola well center; For because furnace wall bottom bonding and cupola well are piled up the working of a furnace fluctuation that produces, can shorten the furnace condition recovery time greatly, more obvious on recovery effects.
The inventive method mechanism of action is following: below the reflowing band; Slag compiles to cupola well through the coke slit, is positioned at the inlet horizontal position at cupola well; Mix with liquid antiscales; Slag composition is able to reconfigure, the effect of the Calcium Fluoride (Fluorspan) performance dilution slag in the antiscales fluorite, and manganese ore generates the manganese monoxide performance and eliminates the effect that graphite carbon is piled up in the antiscales after reacting; The slag that viscosity is bigger, STRENGTH ON COKE is higher at the sepage Capability Requirement of high-temperature zone, requires coke to maintain bigger granularity in the high-temperature zone; To guarantee enough big porosity; Comparatively open infiltration space is provided, and sprays into antiscales, can reduce the slag viscosity from the air port; Improve the flowability of slag, thereby reduced to a certain extent for the specification of quality of going into oven coke; Antiscales itself is not participated in combustion gasification reaction, and proportion is bigger, and inertia is strong, spray in the stove with coal dust after, its own inertial makes it not only act on the blast furnace edge, is tending towards the blast furnace central position simultaneously, reaches and enlivens cupola well, evenly the effect of slag composition.
The inventive method antiscales is allocated breeze blowing into according to 2.0～15kg/tFe, to the different working of a furnaces, can flexibly select injection method, does not influence the operation of normal coal injection, below the inventive method is detailed:
1. furnace wall bottom bonding: furnace wall bottom bonding, when influence blanking, change coal gas and distribute, cause permeability of stock column to descend, pressure reduction rising in bottom too urgently possibly cause bigger slag crust and comes off but handle, and causes furnace temperature to fluctuate widely, and the working of a furnace is further worsened.According to furnace wall bonding degree winding-up fluorite powder; The winding-up amount is pressed 2.0-5kg/tFe; The binary basicity of slag that ore, flux, coke and the coal injection of being packed into by furnace roof determines is controlled at 1.05-1.10, and the winding-up stand-by time returns to normal level with the cooling wall temperature and is as the criterion;
2. cupola well is piled up: cupola well is piled up, and causes the furnace cylinder working volume to diminish, and in the time of original coal air-flow maldistribution, the acceptable air quantity of blast furnace descends, and combustion intensity reduces.The too high slag property accumulation that causes of slag iron property accumulation that the temperature of the furnace hearth deficiency causes and basicity of slag.According to cupola well accumulation degree winding-up fluorite powder; The winding-up amount is pressed 5-10kg/tFe; The binary basicity of slag that ore, flux, coke and the coal injection of being packed into by furnace roof determines is controlled at 1.02-1.12, and the time that stops to jet returns to normal level with the acceptable air quantity of blast furnace and is as the criterion.Graphite for the high Basicity Operation of high silicon causes is piled up; According to cupola well accumulation degree winding-up manganese ore powder; The winding-up amount is pressed 10-15kg/tFe; The binary basicity of slag that ore, flux, coke and the coal injection of being packed into by furnace roof determines is controlled at 1.00-1.05, and the winding-up stand-by time returns to normal level with the acceptable air quantity of blast furnace and is as the criterion.The graphite that the high Basicity Operation of above-mentioned high silicon causes is piled up and also can be adopted winding-up manganese ore powder and fluorite powder mixture to handle; The ratio of manganese ore powder is advisable with 50%-80% in the mixture; Degree according to the cupola well accumulation; The winding-up amount is pressed 10-15kg/tFe, and the binary basicity of slag that ore, flux, coke and the coal injection of being packed into by furnace roof determines is controlled at 1.03-1.07, and the acceptable air quantity of winding-up time blast furnace returns to normal level and is as the criterion;
3. for making the antiscales and the coal dust thorough mixing of winding-up, winding-up antiscales powder exceeds 0.03-0.08Mpa than coal injection at coal powder injection divider inlet forefront pressure at the pressure of coal powder injection divider front end;
4. in winding-up antiscales powder process; Reduced the theoretical combustion temperature before the air port, should adopt the measure that replenishes its fusion power consumption, kept theoretical combustion temperature at 2100-2400 oC; Concrete grammar is: according to antiscales addition 1Kg/tFe, and corresponding raising wind-warm syndrome 4 oC; Or, in the air blast oxygen level of raising 1 ‰, improve comprehensive coke ratio 0.8 Kg/tFe according to antiscales addition 1Kg/tFe.
Several concrete embodiment below are provided:
Embodiment 1: the blast furnace ironmaking process is from the blast furnace static pressure distribution; The bottom house drag losses rises, and full furnace pressure difference raises, and permeability of stock column descends; Air quantity than the normal water pancake low 7%; And cooling wall temperature bottom, bottom cooling wall temperature variation is little, can judge, has formed slag iron in the cupola well and has piled up.Adopt winding-up fluorite powder to handle, fluorite powder straying quatity is 5.0kg/tFe, and the binary basicity of slag of ore, flux, coke and the coal injection decision of being packed into by furnace roof is controlled at 1.02, jet to air quantity return to normal till.Winding-up fluorite powder process improves wind-warm syndrome 20 oC.
Embodiment 2: the blast furnace ironmaking process, and from the blast furnace static pressure distribution, the bottom house drag losses rises; Full furnace pressure difference raises, and permeability of stock column descends, air quantity than the normal water pancake low 8%; And bottom cooling wall temperature variation is little, can judge, forms slag iron in the cupola well and piles up.Adopt winding-up fluorite powder to handle, fluorite powder straying quatity is 6.0kg/tFe, and the binary basicity of slag of ore, flux, coke and the coal injection decision of being packed into by furnace roof is controlled at 1.06, jet to air quantity return to normal till.Winding-up fluorite powder process improves wind-warm syndrome 24 oC.
Embodiment 3: the blast furnace ironmaking process, and from the blast furnace static pressure distribution, the bottom house drag losses rises; Full furnace pressure difference raises, and permeability of stock column descends, air quantity than the normal water pancake low 9%; And bottom cooling wall temperature variation is little, can judge, has formed slag iron in the cupola well and has piled up.Adopt winding-up fluorite powder to handle, fluorite powder straying quatity is 10kg/tFe, and the binary basicity of slag of ore, flux, coke and the coal injection decision of being packed into by furnace roof is controlled at 1.12, jet to air quantity return to normal till.Winding-up fluorite powder process improves comprehensive coke ratio 8 Kg/tFe in the air blast oxygen level of raising 10 ‰.
Embodiment 4: the blast furnace ironmaking process, and from static pressure distribution, the bottom house drag losses raises; Cupola well partial sidewalls temperature reduces more than 10 ℃, and the acceptable air quantity of blast furnace is low by 6% than the normal water pancake, can judge to have the graphite carbon build-up in the stove; Adopt winding-up manganese ore powder to handle; Manganese ore powder winding-up amount is 10/tFe, and the binary basicity of slag of the ore of being packed into by furnace roof, flux, coke and coal injection decision is controlled at 1.00, jet all return to normal level to blast furnace bottom drag losses and air quantity till; Winding-up manganese ore powder process improves comprehensive coke ratio 8 Kg/tFe in the air blast oxygen level of raising 10 ‰.Improve wind-warm syndrome 40oC.
Embodiment 5: the blast furnace ironmaking process, and from static pressure distribution, the bottom house drag losses raises; Cupola well partial sidewalls temperature reduces more than 13 ℃, and the acceptable air quantity of blast furnace is low by 7% than the normal water pancake, can judge to have the graphite carbon build-up in the stove; Adopt winding-up manganese ore powder to handle; Manganese ore powder winding-up amount is 12/tFe, and the binary basicity of slag of the ore of being packed into by furnace roof, flux, coke and coal injection decision is controlled at 1.05, jet all return to normal level to blast furnace bottom drag losses and air quantity till; Winding-up manganese ore powder process improves comprehensive coke ratio 9.6 Kg/tFe in the air blast oxygen level of raising 12 ‰.Improve wind-warm syndrome 48oC.
Embodiment 6: the blast furnace ironmaking process, and from static pressure distribution, the bottom house drag losses raises; Cupola well partial sidewalls temperature reduces more than 15 ℃, and the acceptable air quantity of blast furnace is low by 9% than the normal water pancake, can judge to have the graphite carbon build-up in the stove; And accumulating amount is bigger; Adopt winding-up manganese ore powder and fluorite powder mixture to handle, the ratio of manganese ore powder is 80% in the mixture, and mixture winding-up amount is 15/tFe; The binary basicity of slag that ore, flux, coke and the coal injection of being packed into by furnace roof determines is controlled at 1.03; Jet all return to normal level to blast furnace bottom drag losses and air quantity till, the winding-up process improves comprehensive coke ratio 12Kg/tFe when improving 15 ‰ air blast oxygen level.
Embodiment 7: the blast furnace ironmaking process, and from static pressure distribution, the bottom house drag losses raises; Cupola well partial sidewalls temperature reduces more than 10 ℃, and the acceptable air quantity of blast furnace is low by 8% than the normal water pancake, can judge to have the graphite carbon build-up in the stove; Be attended by the possibility that slag iron is piled up; Adopt winding-up manganese ore powder and fluorite powder mixture to handle, the ratio of manganese ore powder is 50% in the mixture, and mixture winding-up amount is 13/tFe; The binary basicity of slag that ore, flux, coke and the coal injection of being packed into by furnace roof determines is controlled at 1.07; Jet all return to normal level to blast furnace bottom drag losses and air quantity till, the winding-up process improves comprehensive coke ratio 10.4Kg/tFe when improving 13 ‰ air blast oxygen level.
Embodiment 8: the blast furnace ironmaking process; See that from static pressure distribution the drag losses of bottom house rises, permeability of stock column is whole to descend; Restoration of lower stack cooling wall temperature descends more than 5 ℃; Can judge there is furnace wall bottom bonding in the stove that adopt winding-up fluorite powder to handle, fluorite powder straying quatity is 2kg/tFe; The binary basicity of slag that ore, flux, coke and the coal injection of being packed into by furnace roof determines is controlled at 1.05, and jet paramount furnace charge post ventilation property and cooling wall temperature return to till the normal level.Winding-up fluorite powder process improves comprehensive coke ratio 1.6Kg/tFe in the air blast oxygen level of raising 2 ‰.
Embodiment 9: the blast furnace ironmaking process; See that from static pressure distribution the drag losses of bottom house rises, permeability of stock column is whole to descend; Restoration of lower stack cooling wall temperature descends more than 8 ℃; Can judge there is furnace wall bottom bonding in the stove that adopt winding-up fluorite powder to handle, fluorite powder straying quatity is 3kg/tFe; The binary basicity of slag that ore, flux, coke and the coal injection of being packed into by furnace roof determines is controlled at 1.07, and jet paramount furnace charge post ventilation property and cooling wall temperature return to till the normal level.Winding-up fluorite powder process improves wind-warm syndrome 12 oC.
Embodiment 10: the blast furnace ironmaking process; See that from static pressure distribution the drag losses of bottom house rises, permeability of stock column is whole to descend; Restoration of lower stack cooling wall temperature descends more than 10 ℃; Can judge there is furnace wall bottom bonding in the stove that adopt winding-up fluorite powder to handle, fluorite powder straying quatity is 5kg/tFe; The binary basicity of slag that ore, flux, coke and the coal injection of being packed into by furnace roof determines is controlled at 1.10, and jet paramount furnace charge post ventilation property and cooling wall temperature return to till the normal level.Winding-up fluorite powder process improves wind-warm syndrome 20 oC.
Claims (2)
1. blast-furnace tuyere winding-up antiscales method; It is characterized in that: will allocate the coal injection pipeline in proportion into through high pressure fluidizing antiscales powder; Through the pulverized coal injection device antiscales powder is sprayed in the blast furnace hearth by the air port with coal dust, said antiscales adding proportion is 2.0～15kg/tFe, and said antiscales powder is the mixture of fluorite powder, manganese ore powder or said two devices; Antiscales powder degree is-200 orders＞40%, greater than 80 orders＜5%;
According to conditions of blast furnace; It is specific as follows that antiscales sprays into method: eliminate furnace wall bottom bonding and adopt winding-up fluorite powder to handle; Fluorite powder straying quatity is 2.0-5kg/tFe; The binary basicity of slag of the ore of being packed into by furnace roof, flux, coke and coal injection decision is controlled at 1.05-1.10, jets to return to normal level to the cooling wall temperature and end; Eliminate cupola well and pile up and adopt winding-up fluorite powder to handle, fluorite powder straying quatity press 5-10kg/tFe, and the binary basicity of slag of ore, flux, coke and the coal injection decision of being packed into by furnace roof is controlled at 1.02-1.12, jet to the acceptable normal air quantity of blast furnace only; Eliminate the graphite accumulation that the high Basicity Operation of high silicon causes; Adopt winding-up manganese ore powder or winding-up manganese ore powder and fluorite powder mixture to handle; Winding-up manganese ore powder winding-up amount is pressed 10-15kg/tFe; The binary basicity of slag of the ore of being packed into by furnace roof, flux, coke and coal injection decision is controlled at 1.00-1.05, jets to return to normal level to the acceptable air quantity of blast furnace and end; Winding-up manganese ore powder and fluorite powder mixture winding-up amount are pressed 10-15kg/tFe; The binary basicity of slag that ore, flux, coke and the coal injection of being packed into by furnace roof determines is controlled at 1.03-1.07; The ratio of manganese ore powder is 50%-80% in the mixture, jets to return to normal level to the acceptable air quantity of blast furnace and end;
Winding-up antiscales process coal injection inlet pressure >=blast-furnace hot-air pressure 0.08MPa; Winding-up antiscales powder at the pressure >=coal injection of coal powder injection divider front end at coal powder injection divider inlet forefront pressure 0.03-0.08MPa.
2. blast-furnace tuyere winding-up antiscales method according to claim 1 is characterized in that: winding-up antiscales process, and according to antiscales addition 1kg/tFe, corresponding raising wind-warm syndrome 4
oC; Or antiscales addition 1kg/tFe, improve 1 ‰ air blast oxygen level, improve comprehensive coke ratio 0.8 kg/tFe simultaneously.
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| CN 201010525647 CN101962696B (en) | 2010-11-01 | 2010-11-01 | Method for blowing furnace washing agent by using air inlet of blast furnace |
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| CN 201010525647 CN101962696B (en) | 2010-11-01 | 2010-11-01 | Method for blowing furnace washing agent by using air inlet of blast furnace |
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| CN101962696B true CN101962696B (en) | 2012-06-13 |
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|---|---|---|---|---|
| CN102534064A (en) * | 2012-01-31 | 2012-07-04 | 安徽朗斯特复合材料科技有限公司 | Composite blast furnace slag viscosity regulator and application thereof |
| CN104060007B (en) * | 2013-06-14 | 2016-05-04 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method of vanadium titano-magnetite blast furnace process |
| CN106154868B (en) * | 2015-03-26 | 2018-11-23 | 上海梅山钢铁股份有限公司 | A kind of blast-furnace tuyere coke size hierarchical control method |
| CN105886681A (en) * | 2016-05-19 | 2016-08-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for removing accumulation of center of blast furnace hearth |
| CN110305999B (en) * | 2019-07-16 | 2021-03-26 | 山东钢铁股份有限公司 | Metallized furnace charge for treating blast furnace hearth accumulation and using method thereof |
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| CN1042238C (en) * | 1995-03-15 | 1999-02-24 | 宝山钢铁(集团)公司 | Combustion adjuvant and adding method for sprayed coal powder of blast furnace |
| CN1884588A (en) * | 2006-06-14 | 2006-12-27 | 刘凯平 | Manganese pellet ore and associated method of production |
| CN101775451B (en) * | 2010-03-26 | 2012-07-04 | 中南大学 | Blast-furnace smelting method for vanadium titano-magnetite |
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