CN106228011A - The evaluation methodology of coke quality steady - Google Patents
The evaluation methodology of coke quality steady Download PDFInfo
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Abstract
The invention discloses the evaluation methodology of a kind of coke quality steady, belong to technical field of blast furnace process.This evaluation methodology comprises the steps: 1) choose the coke indices in base period, 2) the most every coke index probability X beyond base period is calculated, 3) the stability index Z of coke quality is calculated, 4) in units of the moon, use described step 3) computing formula calculated coke stability factor index Z and each phases of the moon should period blast furnace coke ratio carry out regression analysis, find out the span of control of coke stability factor index Z in conjunction with coal blending cost.The present invention is by setting up coke quality steady index, reflect the fluctuation situation of blast fumance coke quality, provide a kind of can the simple and effective evaluation methodology to blast fumance coke quality steady, the problem that compensate for relying on empirical evaluation to be forbidden in the past, being difficult to quantify.
Description
Technical field
The invention belongs to technical field of blast furnace process, more particularly to the evaluation methodology of a kind of coke quality steady.
Background technology
The quality of coke quality is the key factor affecting smooth operation of furnace and technical-economic index, along with blast furnace technology
Development, the requirement of Coke Quality is more and more higher, does not require nothing more than coke quality and disclosure satisfy that the demand of blast fumance, also requirement
Coke quality has certain stability.
The evaluation index of present stage coke quality mainly includes the ash of coke, fugitive constituent, sulfur, moisture content, fixed carbon, cold
The indexs such as state intensity, hot strength.Along with the development of Coal Blending Technology, the indices of coke quality the most gradually improves, and reaches
A kind of higher level, can meet the needs of blast fumance, but in actual production process, is affected normal by various factors
The quality of coke often can be caused to fluctuate, affect the stability of coke quality, thus affect the stability of blast fumance.And show
The stability of stage blast fumance is most important to smooth operation of furnace and the reduction technical-economic index such as coke ratio, fuel ratio, therefore existing
Blast fumance is just particularly important by the stability of stage coke quality.
Chinese invention patent application (application publication number: CN102851417A, Shen Qing Publication day: 2013-01-02), open
A kind of controlling the method for blast furnace feeding butt coke quality steady, Apparatus and system, the method is mainly by stable coke body
Long-pending, and then realize stably entering the purpose of stove butt coke quality.
Chinese invention patent application (application publication number: CN103901179A, Shen Qing Publication day: 2014-07-02), open
A kind of method evaluating coke Blending Efficiency of Blending and coke quality steady, the method is mainly by considering coke moisture and ash
The impact that brings of fluctuation evaluate the coefficient of stabilization into factory's coke quality and the coefficient of stabilization of feeding density carbonaceous amount, thus realize improving
The stability of feeding density carbonaceous amount, improves blast-furnace technique economic indicator.
Magazine " is smelted iron ", 2015.Feb.Vol.34, No.1, it was recently reported that coke quality is to capital Tang 5500m3Blast furnace coke ratio
Impact, this article analyzes 2 5500m of capital Tang3The composition of blast fumance coke, granularity, cold-performance and hot performance
The impact of Coke Rate, it is believed that for 2 5500m of capital Tang3Blast furnace, coke M40When maintaining more than 91%, coke ratio can be the most steady
Be scheduled on reduced levels, coke CRI and CSR control respectively less than 22% and more than 71% time, coke ratio can exist steadily in the long term
Below 320kg/t.
Above-mentioned document report in steel industry, the evaluation of coke quality fluctuation is simply confined to a certain index, as cold
The impact on blast fumance such as the fluctuation of intensity, calorific intensity etc..But in actual production, the coke of different times is carried out quality inspection
Surveying, the indices of coke all changes occurring, and is not the change of single index, every for different times coke quality
How the combined influence of blast fumance is evaluated by index fluctuation, and current domestic steel industry does not has index of correlation.Ironmaking work
The combined influence of person's Coke Quality indices fluctuation can only rely on experience to carry out simple evaluation, operating difficulties, and mutually
Between there is no comparability, therefore explore a kind of new coke quality index stability for overall merit blast furnace coke quality
Significant.
Summary of the invention
It is an object of the invention to, disclose the evaluation methodology of a kind of coke quality steady.This evaluation methodology characterizes
The fluctuation of the coke quality indices combined influence to blast fumance under existing working condition, not only changes in the past by experience
Evaluate and forbidden, be difficult to the phenomenon that quantifies, and to improving the stability of feeding density carbonaceous amount, improve blast-furnace technique economic indicator meaning
Justice is great.
The evaluation methodology of a kind of coke quality steady, comprises the steps:
1) choosing the coke indices in base period: under the existing working condition of blast furnace, finding out present stage disclosure satisfy that
Smooth operation of furnace, and reach higher limit or the lower limit of every coke index of technical-economic index, as every coke index
Base period；
2) calculate the most every coke index and meet following Mathematical Formula beyond the probability X:X of base period: X=(M1÷M2)
× 100%；
Wherein, M1The number of times of base period is exceeded for the most every coke index；
M2Detection number of times for the most every coke index；
3) the stability index Z:Z calculating coke quality meets following Mathematical Formula:
Z=100%-K1×XAsh-K2×XFugitive constituent-K3×XSulfur-K4×XMoisture content-K5×XM40÷ 2-K5×XM10÷ 2-
K6×XCSR÷ 2-K6×XCRI÷2；
Wherein, K1To K6Weight coefficient blast fumance affected for every coke index；
XAsh、XFugitive constituent、XSulfur、XMoisture content、XM40、XM10、XCSRAnd XCRIBe satisfied by described step 2) in computing formula；
4) in units of the moon, described step 3 is used) computing formula calculated coke stability factor index Z and each phases of the moon
The period of answering, the coke ratio of blast furnace carried out regression analysis.
Further, described step 2) in, when the coke index detected is without departing from base period, it is considered as not fluctuating,
When the coke index detected is beyond base period, it is recorded as fluctuating once.
Yet further, described step 3) in, 0.05≤K1≤ 0.15,0.05≤K2≤ 0.1,0.05≤K3≤ 0.15,
0.05≤K4≤ 0.1,0.3≤K5≤ 0.4,0.3≤K6≤0.4。
Further, the fluctuation of present stage a certain coke index is big on blast fumance impact, this coke index desirable
The higher limit of corresponding weight coefficient, if the fluctuation of present stage a certain coke index is little on blast fumance impact, desirable this
The lower limit of the weight coefficient that coke index is corresponding.
Further, described blast furnace is a 3200m3Level blast furnace.
The operation principle of the evaluation methodology of the present invention is:
Set up a kind of new coke quality evaluation index coke quality steady index Z, reflect blast fumance coke
The fluctuation situation of quality, the calculating process of this coke quality steady index Z is: first according to disclosure satisfy that smooth operation of furnace and technology
The minimum requirements of every coke index that economic indicator is optimum, as the base period of every coke index, then calculates the most each
Coke index is beyond the probability X of base period, then X substitutes into the computing formula of the stability index Z of coke quality, the most then
Answer the coke ratio of blast furnace in period to carry out regression analysis according to coke stability factor index Z with each phases of the moon, find out coke in conjunction with coal blending cost
The span of control of stability index Z.
The beneficial effect of the invention is:
The present invention, by setting up a kind of new coke quality evaluation index coke quality steady index, reflects that blast furnace is raw
The fluctuation situation of product coke quality；By characterizing under existing working condition, the fluctuation of coke quality indices is raw to blast furnace
The combined influence produced, before changing, the evaluation of Coke Quality fluctuation is simply confined in a certain index, have also been changed simultaneously
Rely on empirical evaluation to be forbidden in the past, be difficult to the phenomenon that quantifies.This evaluation methodology is possible not only to simple and effective to blast fumance use
The stability of coke quality is evaluated, and provides directive significance for improving blast-furnace technique economic indicator.
Accompanying drawing explanation
Fig. 1 is the regression analysis structural representation of embodiment coke stability factor index and coke ratio.
Detailed description of the invention
The invention provides the evaluation methodology of a kind of coke quality steady, comprise the steps:
1) choosing the coke indices in base period: under the existing working condition of blast furnace, finding out present stage disclosure satisfy that
Smooth operation of furnace, and reach higher limit or the lower limit of every coke index of technical-economic index, as every coke index
Base period；
Technology as the present invention is preferred, is selected to meet smooth operation of furnace and every coke of technical-economic index optimum
Index, as every coke index of base period.
2) calculate the most every coke index and meet following Mathematical Formula beyond the probability X:X of base period: X=(M1÷M2)
× 100%；
Wherein, M1The number of times of base period is exceeded for the most every coke index；
M2Detection number of times for the most every coke index；
Preferably, when the coke index detected is without departing from base period, the least on blast fumance impact, it is considered as non-ripple
Dynamic, when the coke index detected is beyond base period, blast fumance is had certain negative effect, is recorded as fluctuating once,
Then the like.
3) the stability index Z:Z calculating coke quality meets following Mathematical Formula:
Z=100%-K1×XAsh-K2×XFugitive constituent-K3×XSulfur-K4×XMoisture content-K5×XM40÷ 2-K5×XM10÷ 2-
K6×XCSR÷ 2-K6×XCRI÷2；
Wherein, K1To K6Weight coefficient blast fumance affected for every coke index；And 0.05≤K1≤ 0.15,
0.05≤K2≤ 0.1,0.05≤K3≤ 0.15,0.05≤K4≤ 0.1,0.3≤K5≤ 0.4,0.3≤K6≤0.4；It is typically based on and adopts
Coke resource characteristic and existing working condition under coke the impact of blast fumance is selected K1、K2、K3、K4、K5Or K6Take
Value；Such as, the fluctuation of present stage a certain coke index is big on blast fumance impact, the weight system that this coke index desirable is corresponding
The higher limit of number, if the fluctuation of present stage a certain coke index is little on blast fumance impact, this coke index desirable is corresponding
The lower limit of weight coefficient.
Such as, the fluctuation of ash is relatively big to the stability influence of blast fumance, then K1=0.15, the fluctuation of ash is to blast furnace
The stability influence produced is less, then K1=0.05.
Meanwhile, XAsh、XFugitive constituent、XSulfur、XMoisture content、XM40、XM10、XCSRAnd XCRIBe satisfied by described step 2) in computing formula；
4) in units of the moon, described step 3 is used) computing formula calculated coke stability factor index Z and each phases of the moon
The period of answering, the coke ratio of blast furnace carried out regression analysis.
Further, described step 2) in, when the coke index detected is without departing from base period, it is considered as not fluctuating,
When the coke index detected is beyond base period, it is recorded as fluctuating once.
Yet further, described step 3) in, 0.05≤K1≤ 0.15,0.05≤K2≤ 0.1,0.05≤K3≤ 0.15,
0.05≤K4≤ 0.1,0.3≤K5≤ 0.4,0.3≤K6≤0.4。
Further, the present invention chooses a 3200m of Wuhan Iron and Steel Plant group3As a example by blast furnace, coke used is this group
The 6 meters of coke produced.
Embodiment 1
A kind of evaluation methodology of coke quality steady, it is characterised in that: comprise the steps:
1) coke indices in base period is chosen:
3200m to this iron company3The creation data of level blast furnace is added up, and is drawn by statistical analysis, present stage
Coke fugitive constituent is stable 1.1%～1.3%；Moisture content is stable (does not include coke wet quenching) below 0.5%；Ash is stablized
Less than 12.5%；When sulfur is stablized below 0.75%, blast-furnace technique economic indicator is optimum.Referred to by the hot and cold intensity of coke
Mark is learnt with blast-furnace technique economic indicator coke ratio, the regression analysis of fuel ratio, under the existing working condition of iron company, and cold strength
Stable at M40>=88%, M10≤ 6%；Calorific intensity index is stable when CRI≤22%, CSR >=66%, and blast-furnace technique economy refers to
Mark optimum.
By every coke index in November is weighed, obtain the inspection of every coke index as shown in table 1
Survey number of times and the number of times beyond base period；
2) calculate the most every coke index and meet following computing formula beyond the probability X:X of base period: X=(M1÷M2)
× 100%；
Computing formula in conjunction with table 1 and X, it can be deduced that, in November, XAsh=0, XFugitive constituent=3.33, XSulfur=0, XMoisture content=
0、XM40=13.33, XM10=26.66, XCSR=0, XCRI=12.5
Table 1 every coke in November index is beyond the probability of base period
| Title | XAsh | XFugitive constituent | XSulfur | XMoisture content | XM40 | XM10 | XCSR | XCRI |
| Beyond standard number | 0 | 1 | 0 | 0 | 4 | 8 | 0 | 1 |
| Detection number of times | 30 | 30 | 30 | 30 | 30 | 30 | 8 | 8 |
| Beyond ratio X/% | 0 | 3.33 | 0 | 0 | 13.33 | 26.66 | 0 | 12.5 |
3) the stability index Z of coke quality is calculated: the probability X that every coke index exceeds base period brings the meter of Z into
Calculate in formula, obtained following computing formula:
Z=100%-K1×XAsh-K2×XFugitive constituent-K3×XSulfur-K4×XMoisture content-K5×XM40÷ 2-K5×XM10÷ 2-
K6×XCSR÷ 2-K6×XCRI÷2；
K1、K2、K3、K4、K5And K6Represent that coke indices is to 3200m respectively3The weight coefficient of level blast fumance impact,
Wherein the fluctuation of cold strength index is big on blast fumance impact, therefore K5=0.4, and fugitive constituent, moisture content and the fluctuation of calorific intensity index
Little on blast fumance impact, then K2=0.05, K4=0.05, K6=0.3；And ash, sulfur have a certain impact, then take K1=
0.1, K3=0.1.
By K1、K2、K3、K4、K5And K6, and XAsh、XFugitive constituent、XSulfur、XMoisture content、XM40、XM10、XCSRAnd XCRISubstitute into above-mentioned step simultaneously
Rapid 3) computing formula of Z, is calculated Z=89.96%, and meanwhile, the coke ratio of the blast furnace in this period is 303.50kg/t.
Embodiment 2
The probability X and the stability index Z of coke quality of base period is exceeded according to the every coke index described in embodiment 1
Computing formula, calculate the coke stability factor index of a year, and combine this 3200m in each period3The coke ratio that level blast furnace is corresponding,
Arrive table 2:
Table 2 1～December coke stability factor index and monthly corresponding coke ratio
| Month | Coke stability factor index Z (%) | Coke ratio (kg/t) |
| 1 | 91.23 | 300.40 |
| 2 | 96.15 | 298.50 |
| 3 | 87.85 | 312.40 |
| 4 | 86.97 | 314.20 |
| 5 | 93.52 | 299.20 |
| 6 | 86.13 | 317.60 |
| 7 | 86.54 | 315.90 |
| 8 | 87.20 | 313.80 |
| 9 | 88.53 | 307.40 |
| 10 | 87.75 | 309.90 |
| 11 | 89.96 | 303.50 |
| 12 | 87.14 | 313.20 |
Again with coke stability factor index Z as abscissa, coke ratio is that vertical coordinate carries out regression analysis, has obtained Fig. 1:
As can be seen from Figure 1 when stability index >=91% of coke, along with the raising of coke stability factor index, coke ratio
Decline slow；When stability index≤91% of coke, along with the raising of coke stability factor index, the decline of coke ratio is very
Hurry up.
In view of the raising of coke stability factor index, need to improve the use ratio of high-quality caking coal, coal blending can be caused to become
This raising, therefore for this 3200m3For level blast fumance coke, control the stability index of coke >=91%
Time, Financial cost is optimum.
Above example is only optimal citing, and is not the restriction to embodiments of the present invention.Except above-described embodiment
Outward, the present invention also has other embodiments.The technical scheme that all employing equivalents or equivalent transformation are formed, all falls within the present invention
The protection domain required.
Claims (5)
1. the evaluation methodology of a coke quality steady, it is characterised in that: comprise the steps:
1) choosing the coke indices in base period: under the existing working condition of blast furnace, finding out present stage disclosure satisfy that blast furnace
Direct motion, and reach higher limit or the lower limit of every coke index of technical-economic index, as the base of every coke index
Meet the deadline；
2) calculate the most every coke index and meet following Mathematical Formula beyond the probability X:X of base period: X=(M1÷M2)×
100%；
Wherein, M1The number of times of base period is exceeded for the most every coke index；
M2Detection number of times for the most every coke index；
3) the stability index Z:Z calculating coke quality meets following Mathematical Formula:
Z=100%-K1×XAsh-K2×XFugitive constituent-K3×XSulfur-K4×XMoisture content-K5×XM40÷ 2-K5×XM10÷ 2-K6×
XCSR÷ 2-K6×XCRI÷2；
Wherein, K1To K6Weight coefficient blast fumance affected for every coke index；
XAsh、XFugitive constituent、XSulfur、XMoisture content、XM40、XM10、XCSRAnd XCRIBe satisfied by described step 2) in computing formula；
4) in units of the moon, described step 3 is used) calculated coke stability factor index Z is seasonable with each phases of the moon for computing formula
The coke ratio of phase blast furnace carries out regression analysis.
The evaluation methodology of coke quality steady the most according to claim 1, it is characterised in that: described step 2) in, when
When the coke index detected is without departing from base period, it is considered as not fluctuating, when the coke index detected is beyond base period, note
Record is for fluctuation once.
The evaluation methodology of coke quality steady the most according to claim 1, it is characterised in that: described step 3) in,
0.05≤K1≤ 0.15,0.05≤K2≤ 0.1,0.05≤K3≤ 0.15,0.05≤K4≤ 0.1,0.3≤K5≤ 0.4,0.3≤K6
≤0.4。
The evaluation methodology of coke quality steady the most according to claim 3, it is characterised in that: present stage, a certain coke referred to
Target fluctuation is big on blast fumance impact, and the higher limit of the weight coefficient that this coke index desirable is corresponding, if present stage is a certain
The fluctuation of coke index is little on blast fumance impact, the lower limit of the weight coefficient that this coke index desirable is corresponding.
The evaluation methodology of coke quality steady the most according to claim 1, it is characterised in that: described blast furnace is one
3200m3Level blast furnace.
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| CN110036351A (en) * | 2016-12-07 | 2019-07-19 | 株式会社日立制作所 | Quality management device and method for quality control |
| CN110119783A (en) * | 2019-05-16 | 2019-08-13 | 联想(北京)有限公司 | Prediction of coke quality method, apparatus and computer equipment |
| CN111581598A (en) * | 2020-04-09 | 2020-08-25 | 宣化钢铁集团有限责任公司 | Method for quantitatively evaluating working state of lower part of blast furnace |
| CN112749856A (en) * | 2019-10-30 | 2021-05-04 | 吉林炭素有限公司 | Quantitative sorting method for judging quality of graphite electrode test |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110036351A (en) * | 2016-12-07 | 2019-07-19 | 株式会社日立制作所 | Quality management device and method for quality control |
| CN109063358A (en) * | 2018-08-16 | 2018-12-21 | 马鞍山钢铁股份有限公司 | A kind of method of novel blast-furnace direct motion evaluation |
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| CN112749856A (en) * | 2019-10-30 | 2021-05-04 | 吉林炭素有限公司 | Quantitative sorting method for judging quality of graphite electrode test |
| CN112749856B (en) * | 2019-10-30 | 2024-04-02 | 吉林炭素有限公司 | Quantitative sequencing method for judging quality of graphite electrode test |
| CN111581598A (en) * | 2020-04-09 | 2020-08-25 | 宣化钢铁集团有限责任公司 | Method for quantitatively evaluating working state of lower part of blast furnace |
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