CN107656900A - A kind of method at different stockline compensation angles during determination blast furnace material distribution - Google Patents

A kind of method at different stockline compensation angles during determination blast furnace material distribution Download PDF

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CN107656900A
CN107656900A CN201710780597.XA CN201710780597A CN107656900A CN 107656900 A CN107656900 A CN 107656900A CN 201710780597 A CN201710780597 A CN 201710780597A CN 107656900 A CN107656900 A CN 107656900A
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stockline
cloth
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CN107656900B (en
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陈令坤
邹祖桥
尹腾
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Wuhan Iron and Steel Co Ltd
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Abstract

The method that the present invention provides different stocklines compensation angles during a kind of determination blast furnace material distribution, belong to technical field of blast furnace process, this method is based on the angle position material flow track data measured during blow-on, by the rate of change at the cloth inclination angle corresponding to unit drop point abscissa, calculate when stockline changes as the specific chute inclination angle of the identical drop point abscissa of maintenance.The determination at present invention compensation angle has experimental data support, reduces human error, and the exact distributing that is reduced to of error is provided the foundation, and the degree of accuracy of adjustment is improved in the case where the working of a furnace has huge fluctuation, and cloth guarantee is provided for the timely recovery of the working of a furnace；Accurate placement rate can be greatly promoted by theoretical calculation, the patent provides different compensation angle positions for the stockline at 0.5 meter of interval, refinement compensation section, reduces the skew of furnace charge drop point, can control drop point radius error below 3%.

Description

A kind of method at different stockline compensation angles during determination blast furnace material distribution
Technical field
It is specific that a kind of different stockline compensation during determining blast furnace material distribution are provided the invention belongs to blast furnace material distribution technical field The method at angle.
Background technology
Blast furnace operating is to be matched by what top and the bottom operated to realize being smoothed out for blast furnace ironmaking process, under blast furnace Portion mainly completes aeration operation, has completed the loading of furnace charge in upper blast furnace, blast furnace relies primarily on two kinds of dresses since nearly half a century The addition for realizing furnace charge is put, one kind is clock-type distributing device, and one kind is non material bell cloth device, and " Zhou Chuandian is edited document, blast furnace refining Iron production technology handbook, metallurgical industry publishing house, 2002, P217~231." shown in without clock cloth because cloth is flexibly smart It is accurate and praised highly by contemporary ironmaking worker, have become a kind of distribution device of monopoly at present, it is possible to achieve monocyclic, more A variety of cloth forms such as ring, spiral, sector, fixed point.
The blast furnace normally produced forms stable burden distribution in furnace roof generally by burden distribution matrix, and burden distribution matrix is general By stockline (Sl), kind (Mcoke,More), weight (Wcoke,Wore), cloth angle (αi, the cloth of i=1 ... 11), in different angle positions Material number of rings (n α i), chute fascinate the information structures such as direction (Down, Up), and burden distribution refers to being formed rationally in normal charge level Shape of charge level and O/C than distribution.Determine that shape of charge level and O/C than distribution are furnace charge drop points in furnace roof, once furnace charge drop point Change the change for necessarily causing shape of charge level and O/C to be distributed, and can be caused again in stove by shape of charge level and the O/C change being distributed The change of gas fluid distrbution, so as to cause the change of operation of blast furnace state.
It is by parameter stockline (Sl), kind (M in normal cloth mediation processcoke,More), weight (Wcoke,Wore)、 Cloth angle (αi, the cloth number of rings of i=1 ... 11), in different angle positions, chute fascinate direction (Down, Up) combination come Realize the cloth regulation of specific stockline.In general, α when operation of blast furnace is normali, i=1 ... .11, it is fixed, but by In blast furnace be an internal volume up to 2000~6000m3Huge chemical reactor, sometimes smelting process can by some burst because The influence of element, such as type of furnace acute variation, big slag crust come off, big lubricating substance, big pipeline will be high once there is above-mentioned burst factor Stove operation will big ups and downs, when great fluctuation process occurs, actual charge level can seriously be less than normal charge level, the height normally produced Stove, which is set, controls charge level as Sl=1.0~1.5m, and abnormal stockline can be less than 10 meters in 2~5m, under extreme case, if this When also with same cloth angle (αi, i=1 ... 11) carries out cloth, stockline reduce after because of the extension of material flow track, furnace charge is in stove Interior drop point can change, shape of charge level can be caused to morph so that influence gas stream in the stove distribution and blast furnace process it is normal Carry out, blast-furnace process personnel and administrative staff wish stockline in 1~8 meter of space during actual blast furnace operating, chute cloth A probably stable shape of charge level can be formed after material, this just needs to be modified the cloth inclination angle under different stocklines.
" Zhang Shourong is edited document, the charging actual measurement of new No. 3 BF of WISCO blast furnace opening, Wuhan Iron and Steel Plant ironmaking 40 years (1958~1998), China Middle BJ Universithy of Polytech Press, P371~379." in provide 3 groups of cloth inclination angle (αi, i=1~11；Corresponding 0~2m, 2~4m, 4 ~6m stocklines), this compensation has stably played blast furnace some beneficial effects, but production practices show, stockline often declines 1 Rice, drop point will offset 200~300mm, and 400~600mm skew will occur for 2 meters of stocklines, for 3000m3Large blast furnace, stove Larynx radius only has 5.5 meters, has compared 2~3 cloth angles position poor with radius, it is left 10% that landing error is compared with blast furnace radius The right side, so this division is too coarse, cloth error is still too big.
The pertinent literature delivered at present, the method that cloth angle position is all compensated without offer, document " Zhang Shourong is edited, The charging actual measurement of new No. 3 BF of WISCO blast furnace opening, Wuhan Iron and Steel Plant ironmaking 40 years (1958~1998), publishing house of HUST, P371~ 379." in compensation angle be also a kind of estimation, accuracy lacks experiment and theoretical foundation, random too big.
The content of the invention
In order to solve the above problems, present invention aims at using the material flow track of actual measurement as support, there is provided determines blast furnace cloth The method at different stockline compensation angles during material, the degree of accuracy of adjustment is improved in the case where the working of a furnace has huge fluctuation.
The method that the present invention provides different stocklines compensation angles during a kind of determination blast furnace material distribution, with the angle measured during blow-on Based on the material flow track data of position, by the rate of change at the cloth inclination angle corresponding to unit drop point abscissa, stockline change is calculated It is the specific chute inclination angle of the identical drop point abscissa of maintenance during change.
Specifically, comprise the following steps：
1) intersecting point coordinate of each chute angle position furnace charge fall trajectory and benchmark stockline solves unit：
Using 0 meter of stock line level face of blast furnace as " X " axle, using the blast furnace center at 0 meter of stockline of blast furnace roof as the origin of coordinates, with Blast furnace center line is " Z " axle, and measurement 11 angles position material flow track is designated as in the drop point of 3 stocklines respectively：
Z0:x1,0；x2,0；x3,0；x4,0；x5,0；x6,0；x7,0；x8,0；x9,0；x10,0；x11,0
Z1:x1,1；x2,1；x3,1；x4,1；x5,1；x6,1；x7,1；x8,1；x9,1；x10,1；x11,1
Z2:x1,2；x2,2；x3,2；x4,2；x5,2；x6,2；x7,2；x8,2；x9,2；x10,2；x11,2
Wherein：Zi, i=0,1,2 corresponds to 0,1,2 meter of stockline
The abscissa of intersection point is expressed as：
(xi,j), i=1,2,3 ..., 11；J=0,1,2
Wherein：I=1,2,3 ..., 11 corresponding 11 material flow tracks,
J=0,1,2 corresponds to 0,1,2 meter of stockline；
Carried out curve fitting, tried to achieve according to the abscissa of the 11 angles position material flow track and 3 stockline intersection points that actually measure Each α of actual measurementi, material flow track curve corresponding to i=1-11, with biquadratic curve z=ax4+bx3+cx2+ dx+e carries out track plan Close；
Seek benchmark stockline (l0=1.5m) when, the intersecting point coordinate of each chute angle position furnace charge fall trajectory and benchmark stockline, Try to achieve 11 coordinate points (xi,l0), i=1,2 ..., 11, wherein x1,x2,…,x11It is the friendship of 11 major ingredient streams and benchmark stockline Point；
2) cloth Dip countion content element is determined：
According to the geometric locus for the different streams being fitted in step 1), different chute inclination angles pair in the case of different stocklines are determined The abscissa for the furnace charge drop point answered, i.e. corresponding coordinate matrix are corresponding with specific inclination angle, for different stockline 2m, 2.5m, 3m, 3.5m, 4m, 4.5m, 5m, 5.5m, 6m totally 9 absolute altitudes, try to achieve the abscissa corresponding with inclination angle matrix, i.e.,：
(x1,2,x2,2,,…,x11,2) corresponding to (α1,2,α2,2,α3,2,…,α11,2),
(x1,2.5,x2,2.5,,…,x11,2.5) corresponding to (α1,2.5,α2,2.5,α3,2.5,…,α11,2.5),
(x1,3,x2,3,,…,x11,3) corresponding to (α1,3,α2,3,α3,3,…,α11,3),
(x1,3.5,x2,3.5,,…,x11,3.5) corresponding to (α1,3.5,α2,3.5,α3,3.5,…,α11,3.5),
(x1,4,x2,4,,…,x11,4) corresponding to (α1,4,α2,4,α3,4,…,α11,4),
(x1,4.5,x2,4.5,,…,x11,4.5) corresponding to (α1,4.5,α2,4.5,α3,4.5,…,α11,4.5),
(x1,5,x2,5,,…,x11,5) corresponding to (α1,5,α2,5,α3,5,…,α11,5),
(x1,5.5,x2,5.5,,…,x11,5.5) corresponding to (α1,5.5,α2,5.5,α3,5.5,…,α11,5.5),
(x1,6,x2,6,,…,x11,6) corresponding to (α1,6,α2,6,α3,6,…,α11,6)；
Wherein：(αi,j), i=1,2,3 ..., 11；J=, 2,2.5,3,3.5,4,4.5,5,5.5,6；
3) sought common ground cloth inclination angle unit corresponding to an abscissa as different stocklines：
Tried to achieve using abscissa of 11 geometric locuses in different stocklines on same stockline corresponding to unit abscissa The rate of change at cloth inclination angle, the same intersection point abscissa on same geometric locus and benchmark stockline move to required stockline, asked The difference of former geometric locus and required geometric locus abscissa on required stockline is obtained, abscissa difference is subtracted using former cloth material inclination angle With the product of cloth change of pitch angle rate, you can try to achieve the new cloth inclination angle of required stockline, formula is as follows：
α(i,e)=αi-[(αi+1-αi)/(x(i+1,e)-x(i,e))]*(x(i,e)-xi)
Wherein：I=1,2 ..., 11,
E corresponds to different stockline depth, rice；
4) different stockline compensation cloth angle matrix calculation units：
By above-mentioned steps 3) the compensation cloth angle that is calculated forms the compensation cloth used during new actual cloth Angle；
5) cloth compensating unit：
By above-mentioned steps 4) in related data discretization, be stored in database, once roof material distributing PLC detects material Line is abnormal, will inquire about automatically from database corresponding to cloth inclination angle, perform burden distribution matrix, automatic realization height with new cloth inclination angle Stove cloth operates.
The beneficial effects of the present invention are one side using the material flow track surveyed to rely on, compensated foundation has experiment base Plinth, avoid and be manually set, substantially reduce human error, the exact distributing that is reduced to of error provides the foundation, deposited in the working of a furnace The degree of accuracy of adjustment is improved in the case of huge fluctuation, cloth guarantee is provided for the timely recovery of the working of a furnace；On the other hand it is logical Accurate placement rate can be greatly promoted by crossing theoretical calculation, and the patent provides different compensation angle positions for the stockline at 0.5 meter of interval, Refinement compensation section, reduces the skew of furnace charge drop point, can control drop point radius error below 3%.
Brief description of the drawings
Fig. 1 is material flow track distribution map；
Fig. 2 is the calculating figure at the different stockline compensation angles of the present invention；
Fig. 3 is that burden distribution matrix of the present invention implements block diagram.
Embodiment
With reference to accompanying drawing, embodiments of the invention are described in detail.
With a 3400m3Exemplified by blast furnace, the blast furnace is equipped without clock distribution device, 3.8 meters of chute length, chute diameter 750mm, by taking cloth coke as an example, altogether provided with 11 cloth angles position.Chute material flow track in 11 angles position cloth is as shown in Figure 1.
The intersecting point coordinate of each chute angle position furnace charge fall trajectory of step 1) and benchmark stockline solves unit：
As shown in table 1, the track drop point such as table 2 of cloth track actually measured during blow-on on 0,1,2,3 meter of stockline It is shown.
1 11 cloth angles of table position
1 2 3 4 5 6 7 8 9 10 11
α angles, ° 12 23.5 28 32 35.5 38 40.5 42.5 44 46 48.5
The track drop point of 2 11 angle displacement measurements of table
Above-mentioned real data is carried out curve fitting, tries to achieve each α of actual measurementi, material flow track song corresponding to i=1~11 Line, such as accompanying drawing 1.With 2 curve z=ax2+ bx+c carries out track fitting, the result of the parameter of each angle position homologous thread of gained As shown in table 3.
3 11 angles of table position matched curve parameter list
Angle position a b c
No. 1 Jiao Wei parameter of curve -0.2968 -4.4708 2.2446
No. 2 Jiao Wei parameters of curve -2.0065 -0.7843 2.2626
No. 3 Jiao Wei parameters of curve -4.9556 7.2098 -1.4783
No. 4 Jiao Wei parameters of curve -1.0641 -2.2567 5.8049
No. 5 Jiao Wei parameters of curve -9.2617 32.384 -28.239
No. 6 Jiao Wei parameters of curve -1.2233 0.4724 4.6409
No. 7 Jiao Wei parameters of curve -3.1524 12.619 -12.137
No. 8 Jiao Wei parameters of curve -4.9754 26.727 -35.851
No. 9 Jiao Wei parameters of curve -8.0641 53.726 -88.576
No. 10 Jiao Wei parameters of curve -1.7625 11.22 -17.222
No. 11 Jiao Wei parameters of curve -4.9102 39.73 -80.319
Step 2) determines cloth Dip countion content element：
The abscissa of 9 stocklines and the intersection point of 11 tracks is tried to achieve, as shown in table 4.
The abscissa of 49 stocklines of table and the intersection point of 11 tracks
1 2 3 4 5 6 7 8 9 10 11
2 meters of stocklines 0.89 1.27 1.52 1.84 2.22 2.53 2.89 3.32 3.93 4.40 Furnace wall
2.5 meters of stocklines 0.99 1.35 1.58 1.92 2.27 2.61 2.97 3.40 3.98 4.51 Furnace wall
3 meters of stocklines 1.09 1.43 1.64 2.01 2.32 2.69 3.05 3.46 4.02 Furnace wall Furnace wall
3.5 meters of stocklines 1.19 1.51 1.69 2.08 2.37 2.78 3.13 3.52 4.07 Furnace wall Furnace wall
4 meters of stocklines 1.28 1.58 1.74 2.15 2.41 2.85 3.19 3.58 4.11 Furnace wall Furnace wall
4.5 meters of stocklines 1.38 1.65 1.79 2.23 2.45 2.93 3.26 3.64 4.15 Furnace wall Furnace wall
5 meters of stocklines 1.47 1.71 1.84 2.29 2.49 3.01 3.32 3.69 4.19 Furnace wall Furnace wall
5.5 meters of stocklines 1.56 1.78 1.88 2.37 2.52 3.08 3.38 3.74 4.22 Furnace wall Furnace wall
6 meters of stocklines 1.66 1.84 1.92 2.43 2.56 3.15 3.44 3.79 4.26 Furnace wall Furnace wall
Step 3) is sought common ground cloth inclination angle unit corresponding to an abscissa as different stocklines：
α(i,e)=αi-[(αi+1-αi)/(x(i+1,e)-x(i,e))]*(x(i,e)-xi)
Wherein：I=1,2 ..., 11,
E corresponds to different stockline depth, rice；
Compensation angle position Computing Principle as shown in Fig. 2 different stocklines highly refer to furnace charge drop difference, that is, The height that furnace charge is accumulated in stove is different, and charge level height is different, and charge level is lower, and stockline is deeper, and blast furnace is using furnace throat absolute altitude as 0 meter Stockline, more deeper toward lower stockline, numerical value is bigger；Same abscissa refers to wishing that furnace charge is in the horizontal direction on different stocklines Drop is equally remote, and deep stockline, low-angle can reaches, and the present invention is just to solve for these angles and its change.
By taking 2 meters of stocklines as an example, above-mentioned formula is converted into：
α(i,2)=αi-[(αi+1-αi)/(x(i+1,2)-x(i,2))]*(x(i,2)-xi)
xi：Corresponding 0 meter of stockline data.
Calculating process is as follows, and 1, No. 11 Jiao Wei is due to huge close to center, edge interface effect in table, with reference to experience Value is chosen；Once x coordinate is more than radius R, then consequent α is taken(i,e)Go to substitute；Here α can not possibly occur<10 situation.
αi (αi+1-αi) (x(i+1,2)-x(i,2)) (x(i,2)-xi) α(i,2)
α2=23.5 (α3-α2)=4.5 (x(3,2)-x(2,2))=0.26 (x(2,2)-x2)=0.13 α(2,2)=21.5
α3=28 (α4-α3)=4 (x(4,2)-x(3,2))=0.31 (x(3,2)-x3)=0.20 α(3,2)=25.6
α4=32 (α5-α4)=3.5 (x(5,2)-x(4,2))=0.40 (x(4,2)-x4)=0.29 α(4,2)=29.6
α5=35.5 (α6-α5)=2.5 (x(6,2)-x(5,2))=0.30 (x(5,2)-x5)=0.30 α(5,2)=33
α6=38 (α7-α6)=2.5 (x(7,2)-x(6,2))=0.27 (x(6,2)-x6)=0.25 α(6,2)=35.4
α7=40.5 (α8-α7)=2 (x(8,2)-x(7,2))=0.56 (x(7,2)-x7)=0.60 α(7,2)=38
α8=42.5 (α9-α8)=1.5 (x(9,2)-x(8,2))=0.44 (x(8,2)-x8)=0.64 α(8,2)=40
α9=44 (α10-α9)=2 (x(10,2)-x(9,2))=0.56 (x(9,2)-x9)=0.58 α(9,2)=41.8
α10=46 (α11-α10)=2.5 (x(11,2)-x(10,2))=0.34 (x(10,2)-x10)=0.33 α(10,2)=43.8
The cloth inclination angle that different stocklines are tried to achieve using above-mentioned formula is as shown in table 5.
The cloth inclination angle of same x drop points under 5 different stocklines of table
The different stockline compensation cloth angle matrix calculation units of step 4)：
By the compensation cloth angle under the different stocklines tried to achieve in step 3), the burden distribution matrix in real process is formed.
Step 5) cloth compensating unit：
Above-mentioned data are saved in database, connect PLC, once roof material distributing PLC detects material Line is abnormal, will inquire about automatically from database corresponding to cloth inclination angle, perform burden distribution matrix, automatic realization height with new cloth inclination angle Stove cloth operates, as shown in Figure 3.
With reference to furnace throat radius and stock flow width, according to the result actually corrected, angle is compensated according to the determination difference stockline Method, drop point radius error are controlled below 3%.

Claims (2)

1. a kind of method at different stocklines compensation angles during determination blast furnace material distribution, it is characterised in that：With the angle measured during blow-on Based on the material flow track data of position, by the rate of change at the cloth inclination angle corresponding to unit drop point abscissa, stockline change is calculated It is the specific chute inclination angle of the identical drop point abscissa of maintenance during change.
2. the method at different stocklines compensation angles during determination blast furnace material distribution according to claim 1, it is characterised in that bag Include following steps：
1) intersecting point coordinate of each chute angle position furnace charge fall trajectory and benchmark stockline solves unit：
Using 0 meter of stock line level face of blast furnace as " X " axle, using the blast furnace center at 0 meter of stockline of blast furnace roof as the origin of coordinates, with blast furnace Center line is " Z " axle, and measurement 11 angles position material flow track is designated as in the drop point of 3 stocklines respectively：
Z0:x1,0；x2,0；x3,0；x4,0；x5,0；x6,0；x7,0；x8,0；x9,0；x10,0；x11,0
Z1:x1,1；x2,1；x3,1；x4,1；x5,1；x6,1；x7,1；x8,1；x9,1；x10,1；x11,1
Z2:x1,2；x2,2；x3,2；x4,2；x5,2；x6,2；x7,2；x8,2；x9,2；x10,2；x11,2
Wherein：Zi, i=0,1,2 corresponds to 0,1,2 meter of stockline
The abscissa of intersection point is expressed as：
(xi,j), i=1,2,3 ..., 11；J=0,1,2
Wherein：I=1,2,3 ..., 11 corresponding 11 material flow tracks,
J=0,1,2 corresponds to 0,1,2 meter of stockline；
Carried out curve fitting according to the abscissa of the 11 angles position material flow track and 3 stockline intersection points that actually measure, try to achieve actual measurement Each αi, material flow track curve corresponding to i=1-11, with biquadratic curve z=ax4+bx3+cx2+ dx+e carries out track fitting；
Seek benchmark stockline (l0=1.5m) when, the intersecting point coordinate of each chute angle position furnace charge fall trajectory and benchmark stockline, that is, try to achieve 11 coordinate points (xi,l0), i=1,2 ..., 11, wherein x1,x2,…,x11It is the intersection point of 11 major ingredient streams and benchmark stockline；
2) cloth Dip countion content element is determined：
According to the geometric locus for the different streams being fitted in step 1), determine in the case of different stocklines corresponding to different chute inclination angles The abscissa of furnace charge drop point, i.e. corresponding coordinate matrix are corresponding with specific inclination angle, for different stockline 2m, 2.5m, 3m, 3.5m, 4m, 4.5m, 5m, 5.5m, 6m totally 9 absolute altitudes, try to achieve the abscissa corresponding with inclination angle matrix, i.e.,：
(x1,2,x2,2,,…,x11,2) corresponding to (α1,2,α2,2,α3,2,…,α11,2),
(x1,2.5,x2,2.5,,…,x11,2.5) corresponding to (α1,2.5,α2,2.5,α3,2.5,…,α11,2.5),
(x1,3,x2,3,,…,x11,3) corresponding to (α1,3,α2,3,α3,3,…,α11,3),
(x1,3.5,x2,3.5,,…,x11,3.5) corresponding to (α1,3.5,α2,3.5,α3,3.5,…,α11,3.5),
(x1,4,x2,4,,…,x11,4) corresponding to (α1,4,α2,4,α3,4,…,α11,4),
(x1,4.5,x2,4.5,,…,x11,4.5) corresponding to (α1,4.5,α2,4.5,α3,4.5,…,α11,4.5),
(x1,5,x2,5,,…,x11,5) corresponding to (α1,5,α2,5,α3,5,…,α11,5),
(x1,5.5,x2,5.5,,…,x11,5.5) corresponding to (α1,5.5,α2,5.5,α3,5.5,…,α11,5.5),
(x1,6,x2,6,,…,x11,6) corresponding to (α1,6,α2,6,α3,6,…,α11,6)；
Wherein：(αi,j), i=1,2,3 ..., 11；J=, 2,2.5,3,3.5,4,4.5,5,5.5,6；
3) sought common ground cloth inclination angle unit corresponding to an abscissa as different stocklines：
The cloth on same stockline corresponding to unit abscissa is tried to achieve using abscissa of 11 geometric locuses in different stocklines The rate of change at inclination angle, the same intersection point abscissa on same geometric locus and benchmark stockline move to required stockline, try to achieve institute The difference of former geometric locus and required geometric locus abscissa on stockline is sought, abscissa difference and cloth are subtracted using former cloth material inclination angle Expect the product of change of pitch angle rate, you can try to achieve the new cloth inclination angle of required stockline, formula is as follows：
α(i,e)=αi-[(αi+1-αi)/(x(i+1,e)-x(i,e))]*(x(i,e)-xi)
Wherein：I=1,2 ..., 11,
E corresponds to different stockline depth, rice；
4) different stockline compensation cloth angle matrix calculation units：
The above-mentioned compensation cloth angle being calculated is formed to the burden distribution matrix used during new actual cloth；
5) cloth compensating unit：
Above-mentioned related data discretization is stored in database, will be from number once roof material distributing PLC detects stockline exception According to cloth inclination angle corresponding to automatic inquiry in storehouse, burden distribution matrix is performed with new cloth inclination angle, realizes that blast furnace material distribution operates automatically.
CN201710780597.XA 2017-09-01 2017-09-01 Method for determining compensation angles of different stocklines in material distribution process of blast furnace Active CN107656900B (en)

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