CN110343795A - A kind of active quantization signifying method of blast furnace crucibe - Google Patents
A kind of active quantization signifying method of blast furnace crucibe Download PDFInfo
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- CN110343795A CN110343795A CN201910694721.XA CN201910694721A CN110343795A CN 110343795 A CN110343795 A CN 110343795A CN 201910694721 A CN201910694721 A CN 201910694721A CN 110343795 A CN110343795 A CN 110343795A
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Abstract
The present invention provides a kind of blast furnace crucibe activity to quantify characterizing method, is based on slag iron flow resistance coefficient fL, slag iron is flowed in and out into resistance suffered by cupola well process, is respectively defined as the resistance coefficient f that slag iron flows into cupola wellL‑inThe resistance coefficient f of cupola well is flowed into slag ironL‑out, and cupola well activated state corresponding to three kinds of situations is analyzed and merged, new activity index of hearth NHA is constructed, is realized to the active quantization signifying of cupola well.The case where traditional cupola well activity calculates calculated result distortion is overcome, can be realized and fast and accurately calculate activity index of hearth, provide more scientific judgment basis for quantitatively evaluating cupola well activated state.
Description
Technical field
The present invention relates to technical field of blast furnace ironmaking, and in particular to a kind of active quantization signifying method of blast furnace crucibe.
Background technique
The operation steady in a long-term of modern blast furnace is the key factor that iron and steel enterprise obtains greatest benefit, and cupola well activity like
Blast furnace " heart " maintains the sound development of blast fumance.In recent years, due to material quality deterioration, quantity of slag increase, stopping furnace
Frequently, the reasons such as operating concept is unsound lead to the not normal Frequent Accidents of blast furnace crucibe activity, bring great peace to production process
Full hidden danger and economic loss.Therefore, the active quantization signifying of cupola well is current blast furnace ironmaking critical issue urgently to be resolved.
In the prior art, University of Science & Technology, Beijing proposes activity index of hearthPractice
It proves, this method can be very good description cupola well activity when conditions of blast furnace is normal.But occur in Active hearth condition not normal
When, the calculated result and actual conditions of this method are not inconsistent, and there are distortion phenomenons, cannot be used again.Therefore, for existing
Method there are the problem of, there is an urgent need to develop a kind of new blast furnace crucibe activity to quantify characterizing method.
Summary of the invention
The invention aims to make up prior art defect, a kind of blast furnace crucibe activity quantization characterizing method is provided, it is real
Now to active point of situation quantization signifying of blast furnace crucibe.
To achieve the above object, the present invention is achieved by following scheme:
The present invention provides a kind of blast furnace crucibe activity to quantify characterizing method, is based on slag iron flow resistance coefficient fL, by slag
Iron flows in and out resistance suffered by cupola well process, is respectively defined as the resistance coefficient f that slag iron flows into cupola wellL-inWith slag iron stream
Enter the resistance coefficient f of cupola wellL-out, and cupola well activated state corresponding to three kinds of situations is analyzed and merged, it constructs new
Activity index of hearthIt realizes to the active quantization signifying of cupola well.
Preferably, slag iron flow resistance coefficient
In formula: ε is the voidage of cupola well coke stock column,For the form factor of cokes in hearth, dpFor cokes in hearth
Diameter, top take 0.02m, and lower part takes 0.018m；μ is the viscosity of liquid in cupola well, and ρ is fluid density in cupola well, v0For liquid
Across cupola well section mean flow rate, g is acceleration of gravity, and D is cupola well diameter, and H is slag iron layer thickness when starting to slag tap tapping.
Preferably, it is f that slag iron, which flows into the resistance coefficient of cupola well,L-in, the resistance coefficient that slag iron flows into cupola well is fL-out。
Preferably, three kinds of situations are as follows: fL-in=fL-out、fL-in<fL-outAnd fL-in>fL-out。
Preferably,When, the cupola well working of a furnace is normal；When, the cupola well working of a furnace is abnormal.
The beneficial effects of the present invention are:
Compared with prior art, the working of a furnace has normally been carried out refinement and analyzed by the method for the present invention with abnormal situation, Ke Yiji
Calculate the activity index of hearth under the different working of a furnaces.When the working of a furnace is normal, that is, work asWhen, activity index of hearth will be with
FL-inAnd fL-outIncrease and reduce, also with fL-inWith fL-outThe increase of absolute value of the difference and reduce；When working of a furnace exception,
Work asWhen, activity index of hearth also can be with fL-inAnd fL-outIncrease and reduce, with fL-inWith fL-out
The increase of absolute value of the difference reduces, and declines faster.Calculated result is calculated the present invention overcomes traditional cupola well activity to lose
Genuine situation, can be realized and fast and accurately calculate activity index of hearth, provide more for quantitatively evaluating cupola well activated state
The judgment basis of science.
Detailed description of the invention
Fig. 1 is that the activity index of hearth of the entire working of a furnace fluctuation of 4747m3 blast furnace and recovery process calculates knot in embodiment
Fruit.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution of the present invention is clearly and completely described, it is clear that institute
The embodiment of description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
All other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this hair
The range of bright protection.
A kind of blast furnace crucibe activity quantization characterizing method, is based on slag iron flow resistance coefficient fL, slag iron is flowed in and out
Resistance suffered by cupola well process is respectively defined as the resistance coefficient f that slag iron flows into cupola wellL-inThe resistance of cupola well is flowed into slag iron
Coefficient fL-out, and cupola well activated state corresponding to three kinds of situations is analyzed and merged, it constructs new Active hearth condition and refers to
NumberIt realizes to the active quantization signifying of cupola well.
Slag iron flow resistance coefficient
In formula: ε is the voidage of cupola well coke stock column,For the form factor of cokes in hearth, dpFor cokes in hearth
Diameter, top take 0.02m, and lower part takes 0.018m；μ is the viscosity of liquid in cupola well, and ρ is fluid density in cupola well, v0For liquid
Across cupola well section mean flow rate, g is acceleration of gravity, and D is cupola well diameter, and H is slag iron layer thickness when starting to slag tap tapping.
The resistance coefficient that slag iron flows into cupola well is fL-in, the resistance coefficient that slag iron flows into cupola well is fL-out。
Three kinds of situations are as follows: work as fL-in=fL-outWhen, this is comparatively ideal state, under conditions of blast furnace continuous tapping, furnace
While cylinder lower part smoothly flows out slag iron, the slag iron that vacating space receives top cohesive zone to generate, and cupola well lower part liquid level is basic
It keeps constant；Work as fL-in<fL-outWhen, state that this is undesirable, the blast furnace of normal operation is not in this state, this meaning
Slag iron can be trapped in cupola well, the normal production of blast furnace will be destroyed, generally outside furnace accident or cupola well seriously accumulate, cupola well
Occur in the case where freezing；Work as fL-in>fL-outWhen, this is the state of usual blast furnace, and cupola well lower part is in " waiting " top slag iron
Into.In the case, the absolute value of the difference of the two is smaller, shows that Active hearth condition degree is higher.
When, the cupola well working of a furnace is normal；When, the cupola well working of a furnace is abnormal.
The method of the present invention is installed into certain 4747m at home3On blast furnace two-level computer system, carries out data offline and acquire
And calculating, quantization signifying is carried out to cupola well activity as needed.
4747m3Blast furnace Mr. Yu carries out 72 hours annual overhauls on November 11, to November 13, and working of a furnace monolithic stability is suitable before damping down
Row, but due to being influenced by air port and cooling wall breakage leak factor, cupola well Warm status stability is poor, furnace temperature fluctuation, pressure difference
Occasionally have and stands out.Activity index of hearth fluctuates between 1.8~1.9, and cupola well activated state is generally in normal level, but data
Whole that downward trend is presented, cupola well activated state just has begun downslide before showing damping down, and table 1 is 4747m3On blast furnace November
Ten days main economic and technical indices mean value.
1 4747m of table3Blast furnace early November technical-economic index mean value
After November 14 furnace compound wind, the working of a furnace starts to deteriorate, air quantity than it is normal when atrophy 150~200m3·min-1, pressure difference
It frequently stands out, wide ruler slide rule phenomenon increases, and starts apparent pipeline trip occur, and cool after tapping furnace temperature is first hot, fluctuation is violent, furnace
Cylinder Warm status loss of stability.Activity index of hearth drops to 1.6~1.7 level, and minimum is the 1.58 of November 25,
Cupola well activity is not normal, and table 2 is 4747m3Blast furnace mid or late November main economic and technical indices mean value.
2 4747m of table3Blast furnace mid or late November technical-economic index mean value
At the beginning of 12 months, by taking improvement raw material and fuel quality, reduce coke load, the measures such as anxious amount in increase, cupola well is lived
Property has obtained apparent improvement.Activity index of hearth is improved to 1.7~1.8 level, and conditions of blast furnace tends to normally, Ge Xiangjing
Ji index is improved.Table 3 is 4747m3The technical-economic index mean value of blast furnace early and middle ten days in December.
3 4747m of table3Blast furnace early and middle ten days in December technical-economic index mean value
The activity index of hearth calculated result of entire working of a furnace fluctuation and recovery process is as shown in Figure 1.It was verified that this hair
Bright proposition cupola well activity quantization characterizing method can really react cupola well activated state, effectively help blast furnace operating person and
When hold cupola well activity, when cupola well activity decline or it is not normal when, can first time find and carry out operation intervention as early as possible, and
When avoid because cupola well activity deteriorate caused by loss, keep blast furnace it is steady in a long-term in terms of play a positive role.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, also do not limit the specific embodiment of the invention.Obviously, according to the content of this specification, can make very much
Modifications and variations.These embodiments are chosen and specifically described to this specification, be principle in order to better explain the present invention and
Practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only wanted by right
Ask the limitation of book and its full scope and equivalent.
Claims (5)
1. a kind of blast furnace crucibe activity quantifies characterizing method, which is characterized in that be based on slag iron flow resistance coefficient fL, by slag iron stream
Enter and flow out resistance suffered by cupola well process, is respectively defined as the resistance coefficient f that slag iron flows into cupola wellL-inFurnace is flowed into slag iron
The resistance coefficient f of cylinderL-out, and cupola well activated state corresponding to three kinds of situations is analyzed and merged, construct new cupola well
Enliven sex indexIt realizes to the active quantization signifying of cupola well.
2. blast furnace crucibe activity according to claim 1 quantifies characterizing method, which is characterized in that the slag iron flow resistance
Coefficient
In formula: ε is the voidage of cupola well coke stock column,For the form factor of cokes in hearth, dpFor the straight of cokes in hearth
Diameter, top take 0.02m, and lower part takes 0.018m；μ is the viscosity of liquid in cupola well, and ρ is fluid density in cupola well, v0It is worn for liquid
Cupola well section mean flow rate is crossed, g is acceleration of gravity, and D is cupola well diameter, and H is slag iron layer thickness when starting to slag tap tapping.
3. blast furnace crucibe activity according to claim 1 quantifies characterizing method, which is characterized in that the slag iron flows into cupola well
Resistance coefficient be fL-in, slag iron flow into cupola well resistance coefficient be fL-out.
4. blast furnace crucibe activity according to claim 1 quantifies characterizing method, which is characterized in that three kinds of situations are as follows:
FL-in=fL-out, fL-in<fL-out and fL-in>fL-out.
5. blast furnace crucibe activity according to claim 1 quantifies characterizing method, which is characterized in thatWhen, cupola well
The working of a furnace is normal；When, the cupola well working of a furnace is abnormal.
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Application publication date: 20191018 |