CN109112240A - Method for determining reasonable oxygen enrichment rate of blast furnace - Google Patents
Method for determining reasonable oxygen enrichment rate of blast furnace Download PDFInfo
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- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 94
- 239000001301 oxygen Substances 0.000 title claims abstract description 94
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 claims abstract description 59
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910052742 iron Inorganic materials 0.000 claims abstract description 27
- 239000003245 coal Substances 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 8
- 230000009257 reactivity Effects 0.000 claims abstract description 7
- 239000002817 coal dust Substances 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 7
- 239000003610 charcoal Substances 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 239000008188 pellet Substances 0.000 claims description 5
- YFZOUMNUDGGHIW-UHFFFAOYSA-M p-chloromercuribenzoic acid Chemical compound OC(=O)C1=CC=C([Hg]Cl)C=C1 YFZOUMNUDGGHIW-UHFFFAOYSA-M 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- -1 or is made of sinter Substances 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 25
- 230000000694 effects Effects 0.000 abstract description 14
- 239000000571 coke Substances 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 17
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 238000003723 Smelting Methods 0.000 description 9
- 238000005728 strengthening Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 208000011580 syndromic disease Diseases 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000004836 empirical method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to a method for determining reasonable oxygen enrichment rate of a blast furnace, which aims at 450m applying an oxygen enrichment process3～6000m3In the daily production process of the blast furnace with the effective furnace volume, the blast furnace with the blast air volume, the coal injection ratio, the volatile content in the injected mixed coal powder, the granularity of the injected mixed coal powder, the iron content in the raw materials entering the furnace and the thermal state reactivity of the coke entering the furnace are taken as reference data to determine the reasonable oxygen enrichment rate of the blast furnace in the blast hot air. According to the method, the mathematical correlation between the operation indexes and the oxygen enrichment rate of the blast furnace is established according to the blast furnace operation indexes in different periods, the reasonable oxygen enrichment rate of hot air blown into the blast furnace is determined, the blast furnace is stable and smooth while the blast furnace production is strengthened, and meanwhile, the effects of reducing the fuel consumption and reducing the iron-making production cost can be realized.
Description
Technical field
The present invention relates to ironmaking technology field in steel and iron industry, in particular to the determination side of a kind of reasonable oxygen enrichment percentage of blast furnace
Method.
Background technique
Since country is for the more stringent of environmental requirement, the factors such as metallurgy industry regulation are restricted in addition, just at present
For, iron and steel enterprise cannot increase technological equipment newly, but at the same time, with the rapid development of our country's economy, for different use
The demand of the steel products on way is also growing day by day, in order to meet different industries for the needs of steel products rapid growth,
These iron and steel enterprises, it is necessary to utilize existing weaponry and equipment condition, sufficiently excavation self-ability, be needed with coping with ever-increasing market
It asks.And for iron-smelting process, the promotion of production capacity, under conditions of can not create blast furnace, it is meant that itself production capacity is wanted
Increase, that is to say, that promote smelting strength of blast furnace, accordingly to meet the needs for expanding production capacity.For at present, blast furnace smelting
The promotion for refining intensity, mainly there is following channel measure, and just like selecting under the conditions of existing, quality is preferably former to fire
Material is produced, or entered using the coke that cold and hot state is had excellent performance using raw tissues such as high-grade sinter, pellets
The purpose for increasing yield may be implemented for improving blast fumance condition in furnace；The second is using suitable blast furnace up-down portion
Adjustment system, by the optimizing regulation to bottom house vent area, upper blast furnace chute inclination angle etc., improve blast furnace process into
The effect for increasing yield also may be implemented in journey；Thirdly being exactly to establish the reasonable operation index of blast furnace itself, by taking to blast furnace
The stabilization of blast furnace, high yield, suitable is realized in the reasonable adjusting of the different operations indexs such as air quantity, wind pressure, press in daily production process
Row, to promote the yield of blast furnace itself；The fourth is using technologies such as high wind-warm syndrome and oxygen-enriched coal spray, by improving furnace fuel
Combustion state accelerates the reduction reaction speed in furnace, to reach the promotion of production capacity, increases furnace processor.But production capacity referred to herein
Promotion different measure, be in view of iron and steel enterprise's equipment running status, crude fuel condition and technique exploitativeness etc. are comprehensive
It, just can be using realization on the basis of conjunction factor influences.
Rich-oxygen of blast furnace technology has many decades in different Out By Iron And Steel Enterprises, it may be said that either from the work of oxygen processed
Skill equipment, or implement to the concrete application of blast furnace, it may be said that technique have been relatively mature, and realizes and promotes blast furnace production
It can, reduce the effect of fuel consumption.Therefore, in view of oxygen enrichment technology for the importance of blast fumance, oxygen-enriched quantity blasts heat
The determination of oxygen enrichment percentage in wind, just has a very important significance smelter.And in the daily production process of blast furnace, for
The determination of oxygen enrichment percentage generallys use following several ways, just like empirical method, for different effective heat size blast furnaces, according to passing
The blast furnace operating experience in period provides the oxygen-enriched level under the different working of a furnaces by blast furnace operating person, to meet intensification of smelting process in BF
It needs；The second is maximum Rich Oxygen Amount production, i.e., under the premise of existing oxygen production capacity and blast furnace can receive, using the oxygen-enriched number of the upper limit
Amount carries out tissue production, achievees the purpose that strengthening smelting；The third is in some special working of a furnace periods, such as furnace labour latter stage or furnace
Condition exception period can consider to stop oxygen or reduce oxygen-enriched measure, to realize blast furnace in the stable operation in this period.And blast fumance
It is secret operation, inside is that multiphase exists, and reaction process complexity is cumbersome, mutual restricted influence again between different factors, in addition
During operation of blast furnace, such as raw material and fuel quality, wind-warm syndrome, air quantity, injection coal amount, coal dust self component external condition constantly become
Dynamic, under present condition, the determination of oxygen enrichment percentage reasonable for the blast furnace gone out under different operation index carrys out blast furnace process worker
Say just still one of problem.At the same time, it is mutually restricted due to influencing each other between blast furnace operating parameter, also, this also says
The determination of rich-oxygen of blast furnace rate is illustrated, as soon as being the process comprehensively considered, rather than single provides an oxygen-enriched numerical value in production
It can solve.And the present invention program, just it is built upon different operation parametric interaction, in the basis of reality that conditions each other, it is comprehensive
Close property the considerations of production process in different operation parameter, propose corresponding solution.Reality due to promoting production capacity needs,
Different enterprises also more pay attention to oxygen-enriched strengthening smelting problem, and also on this basis, have developed related to this one
Serial new technology, although herein it should be noted that the relevant technologies here about oxygen processed, oxygen-enriched production are more, but it is right
In how on earth determine in the daily production of blast furnace be suitable for oxygen-enriched level technology, be still rarely reported at present.Its relevant skill
Art is concentrated mainly on the following aspects, about smelting system and the new process of oxygen enrichment system related fields (see Chinese patent " one
Kind rich-oxygen of blast furnace system and steelmaking furnace system " number of patent application: CN107641674A, " the energy saving oxygen enriching method of blast furnace ironmaking "
Number of patent application: CN102978308A, " the oxygen-enriched energy saving technique of blast furnace air and device " number of patent application: CN102776304A
Deng), such technology has reached process operation optimization, and achieve one by being transformed to existing enterprise's rich-oxygen of blast furnace technique
Determine in degree reaching reduce fuel consumption, strengthening smelting effect, but be noted that such technology although applying at the scene in
Certain effect is obtained, but is not mentioned to how oxygen enrichment percentage determines reasonable the relevant technologies among these.There are also be exactly about
Oxygen-enriched coal spray production aspect innovation and creation (see Chinese patent " blast furnace ironmaking oxygen-enriched coal spray for oxygen " number of patent application:
CN1467299, a kind of " blast furnace smelting method for reducing coke ratio and mentioning high-coal ratio " number of patent application: CN107641670A, " to oxygen
The method that blast furnace is blown into fine coal " number of patent application: CN106661640A etc.), such innovation and creation, using the spray in ironmaking production
Coal dust production technology and oxygen-enriched combined technology are blown, and in actual production, also achieves promotion yield, the effect of stable operation
Fruit, but be also required to explanation here, such technology in application process, also fails to enough to provide reasonable oxygen-enriched level, with point
Invention association is little.Still other is exactly the new technology in terms of operating parameter changes and blast furnace takes corresponding measure to cope with
(" see Chinese patent " compensation process of high furnace iron-making air blast system " number of patent application: CN1908193, a kind of " maintenance blast furnace convolution
The method of area's depth " number of patent application: CN104673950A, " a kind of for adjusting the calculation prediction technique of blast furnace operating " patent
Application number: CN102586519A etc.), such technology, by the high furnace parameters of different times adjust, thus for improve injecting coal quantity,
Blast furnace coefficient, longevity create conditions, and realize the optimization of blast furnace operating, but such technology also fails to height in daily production process
Furnace oxygen enrichment percentage, which is made, to be specifically described, therefore unrelated to the invention.In addition, being exactly that can find to obtain some documents and materials both at home and abroad
(see periodical " steel research journal " " blast furnace large-blowing coal and oxygen enrichment percentage reasonably combined " 2006,1 phase, 4；" steel " " reduces
Fuel ratio and raising oxygen enrichment percentage increase furnace processor " 2010,10 phases, 11；" packet header steel journal " is " rich under the conditions of different operation
Influence and its calculating of the oxygen rate to furnace processor " 1992,2 phases, 64 etc.), these documents have discussion to arrive rich under different condition
Influence of the oxygen coal powder injection to process of coal combustion also analyzes and reduces fuel ratio, improves the influence that oxygen enrichment percentage strengthens blast furnace, simultaneously
Under being operated to rich-oxygen of blast furnace, the corresponding institution adjustment of blast furnace is illustrated etc., there is certain guidance for actual production
Meaning.But here it must be emphasized that illustrating, although the discussion of such document is numerous, really for the oxygen enrichment percentage in actual production
It is fixed, again without providing clear saying, therefore just for real rich-oxygen of blast furnace technology, still have not been able to realization different operation index
Under the reasonable oxygen enrichment percentage of blast furnace determination, to reach the optimized production effect of blast furnace.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of determination method of the reasonable oxygen enrichment percentage of blast furnace, according to it is different when
The blast furnace operating index of phase, establishes the mathematical between operation index and rich-oxygen of blast furnace rate, determines that blast furnace blasts in hot wind
Reasonable oxygen enrichment percentage, reinforcing blast furnace production while, reach blast furnace stable smooth operation, at the same can also realize reduce fuel disappear
Consumption reduces the effect of ironmaking production cost.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of determination method of the reasonable oxygen enrichment percentage of blast furnace, for the 450m of application oxygen enriching process3~6000m3Effective heat size is high
Furnace, in daily production process, to blast air quantity, injection coal than the volatile matter content in, injecting mixed coal dust, injecting mixed coal
Iron content, feeding density charcoal hot reactivity carry out blast furnace using following formula as reference data in the granularity of powder, feed stock for blast furnace
The determination of oxygen enrichment percentage in production process:
FYLratio=W+y1×GRFL+y2×PCMB+y3×HFF+y4×MFLD+y5×THL+y6×FYX
Symbol in formula:
FYLratioFor rich-oxygen of blast furnace rate, %；
GRFL is that blast furnace blasts air quantity, m3/min；
PCMB is pulverized coal injection into blast furna ratio, kg/t；
HFF is the volatile matter content in blast furnace blowing mixed coal powder, %；
MFLD is that partial size is less than whole quality of pc percentage shared by 0.074mm, % in injecting mixed coal dust；
THL is iron content in feed stock for blast furnace, %；
FYX is feeding density charcoal hot reactivity, %；
W is constant, -8.1 × 10-2, %
y1For coefficient, value range is -3.8 × 10-6~-4.2 × 10-6, %min/m3；
y2For coefficient, value range is 7.60 × 10-4~7.84 × 10-4, %t/kg；
y3For coefficient, value range is -5.80 × 10-2~-6.16 × 10-2；.
y4For coefficient, value range is -0.95 × 10-3~-1.60 × 10-3；
y5For coefficient, value range is 1.01 × 10-1~-1.14 × 10-1；
y6For coefficient, value range is -1.61 × 10-1~-1.82 × 10-1。
The control range that the blast furnace blasts air quantity is 1500m3/ min~6500m3/min。
The control range of the pulverized coal injection into blast furna ratio is 80kg/t~240mkg/t.
Volatile matter content control range in the blast furnace blowing mixed coal powder is 12%~30%.
Partial size is less than whole quality of pc percentage control range shared by 0.074mm in the injecting mixed coal dust
40%~90%.
The feed stock for blast furnace is made of both sinter and pellet, or by sinter, pellet, lump ore three's structure
At the control range of iron content is 40%~62% in feed stock for blast furnace.
The control range of the feeding density charcoal hot reactivity is 17%~38%.
Compared with prior art, the beneficial effects of the present invention are:
Blast furnace operating index of the present invention according to different times, establishes the number between these operation indexs and rich-oxygen of blast furnace rate
Association is learned, may thereby determine that out that blast furnace blasts the reasonable oxygen enrichment percentage in hot wind, can be reached while reinforcing blast furnace produces
Blast furnace stable smooth operation, while can also realize reduction fuel consumption, reduce the effect of ironmaking production cost.
Specific embodiment
Below with reference to embodiment, the present invention is further described:
The present invention will be described in detail for following embodiment.These embodiments be only to preferred embodiment of the invention into
Row description, does not limit the scope of the present invention.
Embodiment 1
The effective heat size 450m of certain steel plant3Blast furnace, see Table 1 for details for the operating parameter in the daily production process of blast furnace；
Table 1: operating parameter in the daily production process of blast furnace
After optimizing and revising, see Table 2 for details for the variation of rich-oxygen of blast furnace rate；
Table 2: rear rich-oxygen of blast furnace rate comparison, % are optimized and revised
| Project | Numerical value |
| Former rich-oxygen of blast furnace rate, % | 1.52 |
| Optimize and revise rear rich-oxygen of blast furnace rate, % | 2..15 |
After optimizing and revising, see Table 3 for details by the blast furnace daily output, rate of fuel consumption and ton iron Cost comparisons；
Table 3: the blast furnace daily output, fuel consumption and the comparison of ton iron production cost
It is carried out in this way to effective heat size 450m3The determination of oxygen enrichment percentage in the daily production process of blast furnace, can be strong
While changing blast fumance, reach blast furnace stable smooth operation, blast furnace daily output 30t/d can be increased after implementation, reduces fuel consumption
Quantity 12kg/t reduces 14 yuan/ton of ton iron cost, realizes the optimized production effect of blast furnace.
Embodiment 2
The effective heat size 1080m of certain steel plant3Blast furnace, see Table 4 for details for the operating parameter in the daily production process of blast furnace；
Table 4: operating parameter in the daily production process of blast furnace
After optimizing and revising, see Table 5 for details for the variation of rich-oxygen of blast furnace rate；
Table 5: rear rich-oxygen of blast furnace rate comparison, % are optimized and revised
| Project | Numerical value |
| Former rich-oxygen of blast furnace rate, % | 1.86 |
| Optimize and revise rear rich-oxygen of blast furnace rate, % | 2.35 |
After optimizing and revising, see Table 6 for details by the blast furnace daily output, rate of fuel consumption and ton iron Cost comparisons；
Table 6: the blast furnace daily output, fuel consumption and the comparison of ton iron production cost
It is carried out in this way to effective heat size 1080m3The determination of oxygen enrichment percentage in the daily production process of blast furnace, can be strong
While changing blast fumance, reach blast furnace stable smooth operation, blast furnace daily output 42t/d can be increased after implementation, reduces fuel consumption
Quantity 9kg/t reduces 12 yuan/ton of ton iron cost, realizes the optimized production effect of blast furnace.
Embodiment 3
The effective heat size 2580m of certain steel plant3Blast furnace, see Table 7 for details for the operating parameter in the daily production process of blast furnace；
Table 7: operating parameter in the daily production process of blast furnace
After optimizing and revising, see Table 8 for details for the variation of rich-oxygen of blast furnace rate；
Table 8: rear rich-oxygen of blast furnace rate comparison, % are optimized and revised
| Project | Numerical value |
| Former rich-oxygen of blast furnace rate, % | 1.55 |
| Optimize and revise rear rich-oxygen of blast furnace rate, % | 1.97 |
After optimizing and revising, see Table 9 for details by the blast furnace daily output, rate of fuel consumption and ton iron Cost comparisons；
Table 9: the blast furnace daily output, fuel consumption and the comparison of ton iron production cost
It is carried out in this way to effective heat size 2580m3The determination of oxygen enrichment percentage in the daily production process of blast furnace, can be strong
While changing blast fumance, reach blast furnace stable smooth operation, blast furnace daily output 46t/d can be increased after implementation, reduces fuel consumption
Quantity 15kg/t reduces 20 yuan/ton of ton iron cost, realizes the optimized production effect of blast furnace.
Embodiment 4
The effective heat size 3200m of certain steel plant3Blast furnace, see Table 10 for details for the operating parameter in the daily production process of blast furnace；
Table 10: operating parameter in the daily production process of blast furnace
After optimizing and revising, see Table 1 for details 1 for the variation of rich-oxygen of blast furnace rate；
Table 11: rear rich-oxygen of blast furnace rate comparison, % are optimized and revised
| Project | Numerical value |
| Former rich-oxygen of blast furnace rate, % | 3.16 |
| Optimize and revise rear rich-oxygen of blast furnace rate, % | 3.50 |
After optimizing and revising, see Table 1 for details 2 by the blast furnace daily output, rate of fuel consumption and ton iron Cost comparisons；
Table 12: the blast furnace daily output, fuel consumption and the comparison of ton iron production cost
It is carried out in this way to effective heat size 3200m3The determination of oxygen enrichment percentage in the daily production process of blast furnace, can be strong
While changing blast fumance, reach blast furnace stable smooth operation, blast furnace daily output 53t/d can be increased after implementation, reduces fuel consumption
Quantity 7kg/t reduces 11 yuan/ton of ton iron cost, realizes the optimized production effect of blast furnace.
Embodiment 5
The effective heat size 4038m of certain steel plant3Blast furnace, see Table 1 for details 3 for operating parameter in the daily production process of blast furnace；
Table 13: operating parameter in the daily production process of blast furnace
After optimizing and revising, see Table 1 for details 4 for the variation of rich-oxygen of blast furnace rate；
Table 14: rear rich-oxygen of blast furnace rate comparison, % are optimized and revised
| Project | Numerical value |
| Former rich-oxygen of blast furnace rate, % | 3.80 |
| Optimize and revise rear rich-oxygen of blast furnace rate, % | 4.24 |
After optimizing and revising, see Table 1 for details 5 by the blast furnace daily output, rate of fuel consumption and ton iron Cost comparisons；
Table 15: the blast furnace daily output, fuel consumption and the comparison of ton iron production cost
It is carried out in this way to effective heat size 4038m3The determination of oxygen enrichment percentage in the daily production process of blast furnace, can be strong
While changing blast fumance, reach blast furnace stable smooth operation, blast furnace daily output 44t/d can be increased after implementation, reduces fuel consumption
Quantity 8kg/t reduces 14 yuan/ton of ton iron cost, realizes the optimized production effect of blast furnace.
Claims (7)
1. a kind of determination method of the reasonable oxygen enrichment percentage of blast furnace, which is characterized in that for the 450m of application oxygen enriching process3~6000m3
Effective heat size blast furnace, in daily production process, with blast air quantity, injection coal than in, injecting mixed coal dust volatile matter content,
Iron content, feeding density charcoal hot reactivity are as reference data in the granularity of injecting mixed coal dust, feed stock for blast furnace, using following public affairs
Formula carries out the determination of oxygen enrichment percentage in blast furnace production process:
FYLratio=W+y1×GRFL+y2×PCMB+y3×HFF+y4×MFLD+y5×THL+y6×FYX
Symbol in formula:
FYLratioFor rich-oxygen of blast furnace rate, %；
GRFL is that blast furnace blasts air quantity, m3/min；
PCMB is pulverized coal injection into blast furna ratio, kg/t；
HFF is the volatile matter content in blast furnace blowing mixed coal powder, %；
MFLD is that partial size is less than whole quality of pc percentage shared by 0.074mm, % in injecting mixed coal dust；
THL is iron content in feed stock for blast furnace, %；
FYX is feeding density charcoal hot reactivity, %；
W is constant, -8.1 × 10-2, %；
y1For coefficient, value range is -3.8 × 10-6~-4.2 × 10-6, %min/m3；
y2For coefficient, value range is 7.60 × 10-4~7.84 × 10-4, %t/kg；
y3For coefficient, value range is -5.80 × 10-2~-6.16 × 10-2；.
y4For coefficient, value range is -0.95 × 10-3~-1.60 × 10-3；
y5For coefficient, value range is 1.01 × 10-1~-1.14 × 10-1；
y6For coefficient, value range is -1.61 × 10-1~-1.82 × 10-1。
2. a kind of determination method of the reasonable oxygen enrichment percentage of blast furnace according to claim 1, which is characterized in that the blast furnace drum
The control range for entering air quantity is 1500m3/ min~6500m3/min。
3. a kind of determination method of the reasonable oxygen enrichment percentage of blast furnace according to claim 1, which is characterized in that the blast furnace spray
The control range for blowing coal ratio is 80kg/t~240mkg/t.
4. a kind of determination method of the reasonable oxygen enrichment percentage of blast furnace according to claim 1, which is characterized in that the blast furnace spray
Blowing the volatile matter content control range in mixed coal powder is 12%~30%.
5. a kind of determination method of the reasonable oxygen enrichment percentage of blast furnace according to claim 1, which is characterized in that the blowing is mixed
Closing partial size in coal dust to be less than whole quality of pc percentage control range shared by 0.074mm is 40%~90%.
6. a kind of determination method of the reasonable oxygen enrichment percentage of blast furnace according to claim 1, which is characterized in that described enters furnace original
Material is made of both sinter and pellet, or is made of sinter, pellet, lump ore three, iron content in feed stock for blast furnace
Control range be 40%~62%.
7. a kind of determination method of the reasonable oxygen enrichment percentage of blast furnace according to claim 1, which is characterized in that the feeding density
The control range of charcoal hot reactivity is 17%~38%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112176135A (en) * | 2020-09-15 | 2021-01-05 | 万洲电气股份有限公司 | Energy-saving optimization method and system based on blast furnace energy efficiency analysis |
| CN113569381A (en) * | 2021-06-24 | 2021-10-29 | 鞍钢股份有限公司 | Calculation method for indirect reduction rate of large-scale blast furnace burden and determination of coal injection quantity |
| CN113570108A (en) * | 2021-06-24 | 2021-10-29 | 鞍钢股份有限公司 | Calculation method for direct reduction rate of large-scale blast furnace burden and determination of charging coke ratio of large-scale blast furnace burden |
| CN115341060A (en) * | 2022-09-15 | 2022-11-15 | 中冶赛迪工程技术股份有限公司 | System, method, equipment and medium for determining oxygen enrichment rate of blast furnace |
-
2018
- 2018-09-05 CN CN201811031177.2A patent/CN109112240A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112176135A (en) * | 2020-09-15 | 2021-01-05 | 万洲电气股份有限公司 | Energy-saving optimization method and system based on blast furnace energy efficiency analysis |
| CN113569381A (en) * | 2021-06-24 | 2021-10-29 | 鞍钢股份有限公司 | Calculation method for indirect reduction rate of large-scale blast furnace burden and determination of coal injection quantity |
| CN113570108A (en) * | 2021-06-24 | 2021-10-29 | 鞍钢股份有限公司 | Calculation method for direct reduction rate of large-scale blast furnace burden and determination of charging coke ratio of large-scale blast furnace burden |
| CN113569381B (en) * | 2021-06-24 | 2023-12-15 | 鞍钢股份有限公司 | Indirect reduction rate of large blast furnace burden and calculation method for determining coal injection quantity |
| CN113570108B (en) * | 2021-06-24 | 2024-01-09 | 鞍钢股份有限公司 | Large blast furnace burden direct reduction rate and calculation method for determining charging coke ratio thereof |
| CN115341060A (en) * | 2022-09-15 | 2022-11-15 | 中冶赛迪工程技术股份有限公司 | System, method, equipment and medium for determining oxygen enrichment rate of blast furnace |
| CN115341060B (en) * | 2022-09-15 | 2023-12-26 | 中冶赛迪工程技术股份有限公司 | System, method, equipment and medium for determining oxygen enrichment rate of blast furnace |
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Application publication date: 20190101 |