CN107335788B - A kind of electric furnace tapping goes out the weighing technique of iron in the process - Google Patents
A kind of electric furnace tapping goes out the weighing technique of iron in the process Download PDFInfo
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- CN107335788B CN107335788B CN201710362424.6A CN201710362424A CN107335788B CN 107335788 B CN107335788 B CN 107335788B CN 201710362424 A CN201710362424 A CN 201710362424A CN 107335788 B CN107335788 B CN 107335788B
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- iron
- angle
- tapping
- electric furnace
- burner hearth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
- B22D2/003—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the level of the molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
Abstract
The present invention relates to the weighing techniques for going out iron during electric furnace tapping a kind of in casting technology field, the threedimensional model of burner hearth cavity is mainly established by three-dimensional software, then the quality that molten iron to different angle calculates remaining molten iron is toppled over by beveling threedimensional model simulation, it is carried out curve fitting again using dump angle and remaining molten steel quality as input variable and obtains the calculation formula of matched curve, utilize the calculation formula of the matched curve, when electric furnace topples over tapping, sensor for measuring electric furnace inclination angle is installed outside electric furnace, to measure the angle that electric furnace is toppled in due course, the angle is substituted into the formula of matched curve, directly calculate the quality of remaining electric water in electric furnace, and tapping flow can be further calculated, the tapping dynamic parameter such as iron out, to instruct the current-following inoculation technique at scene.
Description
Technical field
The present invention relates to casting technology field, in particular to electric furnace goes out iron and tapping flow velocity after a kind of molten casting iron melting
Measurement method.
Background technique
During electric furnace tapping, the tapping of some casting breeds job requirement as tapping carries out, and inovulant is needed with stream
The time for being uniformly added into molten iron, and being added must not be less than the 70% of entire tapping duration.Inovulant aequum is generally according to casting
In type depending on iron liquid weight, can the additional amount and addition speed of inovulant directly affect in proportion with tapping flow control
Pregnant effect and cost.Can automatic inoculation device accurately control incubation time, innoculant adding quantity and speed is added, and depend on
Can tapping weight and the data of tapping flow velocity accurately obtain.
In the prior art, during common tapping there are mainly two types of the weighing techniques of weight of molten iron.A kind of method be
Furnace bottom installs weighing sensor, obtains tapping weight and tapping flow velocity by electric furnace remaining weight.The patent of similar approach
Such as " the molten steel weighing mechanism for metallurgy conticaster " of Daye Special Steel Co., Ltd, application No. is
201410461533.X；" continuous casting ladle molten steel weighing apparatus " of Yancheng Asanuo Weighing Technology Co., Ltd., application No. is
200620069365.0；" the hot metal ladle car on-line molten iron desulphurization pretreatment system of Beijing Shougang International Engineering Technology Co., Ltd
System ", application No. is 200910081140.5；A kind of " the molten iron weighing casting device " of Anqing Supreme Being's Burger thatch cylinder sleeve Co., Ltd,
Application No. is 201520543772.X etc..Another method is to install in reception device (such as electri forklift) or transloading equipment bottom
Weighing sensor, directly calculating tapping cumulative weight and tapping flow velocity.The patent of similar approach such as George's Fischer automobile product
" a kind of liquid iron balling during fork truck weighing system " of (Kunshan) Co., Ltd, application No. is 201520257313.5.
Through practical application and test, weighed using first method, in electric furnace body and molten iron totality deviation of gravity center
When smaller, weighing and sensing data are relatively accurate.But when larger with tapping process totality deviation of gravity center, weighing and sensing data error
Larger, by taking 5 tons of furnaces as an example, maximum deviation is 1.4 tons or so, and data can not be applied.Second method is in weighing pilot process
Data are relatively steady, but at the end of tapping starts with tapping and during tapping molten iron flow rates fluctuation it is larger when, weighing pass
Sense data can be changed greatly as the impact of molten iron is fluctuated, and data can only be measured as tapping total weight, can not be used as
Process control variable is used cooperatively with automatic inoculation device.
Summary of the invention
The present invention is big for molten iron weighing method fluctuating error during tapping in the prior art, and weighing accuracy is low to ask
Topic provides a kind of electric furnace tapping weighing technique of iron out in the process, in order to angle during tapping, toppled over according to electric furnace
Degree, accurately obtains out the dynamic data of iron, tapping flow velocity.
The object of the present invention is achieved like this, and a kind of electric furnace tapping goes out the weighing technique of iron in the process, respectively includes
Following process:
A) burner hearth cavity size three-dimensional models: obtaining burner hearth cavity according to original plan sheet or direct measurement method
Then three-dimensional dimension establishes the threedimensional model of hearth body by engineering software；
B) residual volume data acquisition in simulated hearth toppling process；Change of pitch angle mistake in simulated hearth toppling process
Journey starts successively to chamfer threedimensional model using three-dimensional software along the corresponding angle point of the corresponding tapping hole of the threedimensional model, beveling
Corresponding threedimensional model volume is to topple over the volume of remaining molten iron in above-mentioned mis-cut angle rear hearth below face, mis-cut angle be from
1 °~90 ° of the corresponding angle point of tapping hole is successively angularly incremented by value；The corresponding residual body of each mis-cut angle of list records respectively
Product value；
C) burner hearth dump angle is with remaining molten steel quality half interval contour fitting: each mis-cut angle that B) process is obtained is corresponding
Residual body product value calculates the quality of remaining molten iron multiplied by molten iron density, and records B) in table listed by process, then pass through engineering
Software is carried out curve fitting using burner hearth dump angle and remaining molten steel quality as input variable respectively, it is bent to select suitable fitting
Line computation formula；
D) the measurement of burner hearth dump angle: the horizontal position mounted angle sensor in burner hearth outer, with real-time measurement furnace
The dump angle of body relative level；
E) go out the calculating of weight of iron: the flip angle angle value measured during D) substituted into C) the obtained matched curve meter of process
Formula is calculated, the remaining molten steel quality M and tapping flow velocity V when different dump angles are calculated separately.
The weighing technique for going out iron during electric furnace tapping of the invention, three-dimensional modeling is combined with curve matching, mould
The variation of remaining iron water amount in the burner hearth toppling process of quasi- three-dimensional modeling obtains dump angle and remaining iron in flake hearth-tapping toppling process
The fit curve equation of water quality；During realizing electric furnace tapping by the fit curve equation, by electric furnace dump angle
Timely monitor, calculate the weight of remaining molten iron in flake hearth-tapping, and further calculate electric furnace and go out iron and tapping flow velocity, thus
The dynamic data that electric furnace goes out iron and tapping flow velocity is accurately and quickly obtained, the current-following inoculation technique at scene is instructed.
It is matched curve during raising measurement accuracy, the C) according to engineer application accuracy requirement, selects quadratic regression
Matched curve or cubic regression matched curve.
During the precision for improving matched curve, the B), the incremental spacing of the mis-cut angle is 1 °.
To compensate in burner hearth service life, the variation of burner hearth cavity cavity volume because of charging impact and caused by wearing, institute
The service life period for stating burner hearth is n times, and the every melting of burner hearth is using once, and the increase of burner hearth cavity volume is V, then n-th
When melt iron, the correction value of remaining molten steel quality is M in burner hearthAmendment, MAmendment=(n-1) * V*(90- dump angle) ρ/90 *, then
Real surplus iron water amount is MIt is practical=M+MAmendment。
For the running parameter that can reflect iron when guaranteeing electric furnace tapping in time, the obliquity sensor and data
Processing module connection, the data processing module are connect with output module, and the data processing module is according to dump angle and intends
The calculation formula for closing curve calculates remaining iron water amount and in due course tapping flow velocity in burner hearth, and the output module is for exporting flip angle
Degree, remaining molten steel quality, tapping flow velocity and iron out.
To be further reduced measurement error, when calculating remaining iron water amount, in unit time 1s, the obliquity sensor every
10ms value is primary, is averaging after abnormal value elimination, which is substituted into matched curve calculation formula and obtains current residual iron
Water quality.
Because the molten iron flow after melting is poor, it is poor there are the regular hour that molten iron is flow in casting ladle from the tapping hole of electric furnace,
It therefore, is ▽ t seconds when molten iron starts to be poured onto molten iron to reach the time of ladle, then molten iron claims in T when calculating tapping speed
The tapping speed at moment are as follows: the remaining iron water amount of remaining iron water amount-(T-▽ t) second of (T-(▽ t+1)) second.
Detailed description of the invention
Fig. 1 is the axial section of burner hearth.
Fig. 2 is that electric furnace tilts tapping process schematic.
Fig. 3 is the Quadratic Regression Fitting curve graph that electric furnace tilts remaining weight of molten iron and tilt angle during tapping.
Fig. 4 is the cubic regression matched curve figure that electric furnace tilts remaining weight of molten iron and tilt angle during tapping.
Specific embodiment
With reference to the accompanying drawing and the specific embodiment method that the present invention will be described in detail.
Go out the detailed process of the weighing technique of iron during the electric furnace tapping of the present embodiment are as follows:
A) 1 inner cavity size three-dimensional of burner hearth is modeled: the shape of the electric stove hearth 1 as shown in Figure 1, upper section is elongated cylinder,
Lower section is round estrade, and bottom is spheroid, specifically can obtain burner hearth cavity according to original plan sheet or direct measurement method
Three-dimensional dimension, the threedimensional model of the hearth body is then established by engineering software；
B) residual volume data acquisition in simulated hearth toppling process；As shown in Figure 1, using three-dimensional software, simulated hearth
Change of pitch angle process in toppling process starts successively edge and level along the corresponding angle point of the corresponding tapping hole of above-mentioned threedimensional model
Threedimensional model is chamfer at 1 °~90 ° of directions, corresponding threedimensional model volume is after tilting above-mentioned mis-cut angle below scarf
The volume of remaining molten iron in burner hearth, mis-cut angle are incremented by 1 ° every time, and the corresponding residual body of each mis-cut angle of list records respectively
Product value is as described in Table 1, tilt angle when above-mentioned mis-cut angle i.e. burner hearth are toppled over；Then C is carried out) burner hearth of process topples over
Angle and remaining molten steel quality half interval contour fitting: the corresponding residual body product value of each mis-cut angle that B) process is obtained is multiplied by molten iron
The empirical value of density calculates the quality of remaining molten iron, and the empirical value of the present embodiment molten iron density takes 6.9g/cm3Value, and record
In table 1, then by minitab engineering software, respectively using burner hearth dump angle and remaining molten steel quality as input variable into
Row curve matching, Quadratic Regression Fitting curve and curve equation and cubic regression matched curve and curve equation in the present embodiment
As shown in Figure 3 and Figure 4, the shape of the curve and the specific form size of burner hearth are closely related, can be according to setting in practical application
Standby configuration and measurement accuracy demand select suitable matched curve calculation formula；D during), the measurement of burner hearth tilt angle,
As shown in Fig. 2, the measurement of 1 dump angle of burner hearth is generally inclined in the horizontal position installation of burner hearth outer during live melting tapping
Angle transducer 2, with the dump angle of real-time measurement furnace body relative level；E during), according to above-mentioned matched curve, by D)
The flip angle angle value measured in the process substitutes into matched curve calculation formula, burner hearth when calculating tilt angles different when electric furnace tapping
The quality of interior residue molten iron, the parameters such as tapping flow and out iron.Within period actual life of electric furnace, every time to burner hearth
Interior charging process, the furnace lining surface in burner hearth can be rough and uneven in surface because of the impact that raw material are added, and brinelling is gradually deepened, often
After secondary high melt, the volume of burner hearth can slightly increase.According to previous experiences data, the safe and effective access times N of furnace lining is
In life cycle, the difference of the maximum capacity for taking burner hearth last to use and the maximum capacity used for the first time has divided by the safety of furnace lining
Access times N is imitated, obtains molten iron of every melting, burner hearth increases cubical content, which is evenly distributed to 1 ° -90 ° equal again
It is even to topple over, according to the corrected parameter of above-mentioned principle available one remaining molten iron volume, it is above-mentioned which is participated in into substitution
Theoretical fitting curve calculation formula is to get to actual remaining iron water amount calculation formula.The calculation method of corrected parameter are as follows: burner hearth
The service life period be n times, the every melting of burner hearth is using primary, and the increase of burner hearth cavity volume is V, then n-th smelting iron
When water, the correction value of remaining molten steel quality is M in burner hearthAmendment, MAmendment=(n-1) * V*(90- dump angle) * ρ/90, ρ be molten iron
Density, then real surplus iron water amount is MIt is practicalRemaining molten steel quality+the M of=theoryAmendment。
For the calculating that above-mentioned parameter is rapidly completed convenient for scene, above-mentioned calculating process can be handled by data processing module
And export, obliquity sensor 2 is connect with data processing module, data processing module is connect with output module, the data processing
Module according to the calculation formula of matched curve after tilt angle and amendment calculate remaining iron water amount in burner hearth, in due course tapping flow velocity and
Iron out, and dump angle, remaining molten steel quality, tapping flow velocity and site techniques such as iron out are exported by output module in due course
Parameter.When calculating remaining iron water amount, in unit time 1s, obliquity sensor is every in a 10ms inclination angle value of reading, 1s
Value 10 times altogether, is averaging inclination angle value after abnormal value elimination, which is substituted into revised matched curve and calculates public affairs
Formula obtains current residual molten steel quality.During practical tapping, because the molten iron flow after melting is poor, tapping of the molten iron from electric furnace
It is poor there are the regular hour in casting ladle that mouth is flow to, and therefore, when calculating tapping speed, reaches molten iron when molten iron starts to be poured onto molten iron
The time of packet is ▽ t seconds, and the value of the ▽ t is live according to the height distance of tap hole of electric furnace to ladle, real according to casting
Border is generally 1~3 second, and in practical casting, value 2 seconds, then molten iron claims the tapping speed at moment in T are as follows: the residue of (T -3) second
The remaining iron water amount of iron water amount-(T -2) second.
Go out the weighing technique of iron, the inclination of directly measured quantities and electric furnace during above-mentioned electric furnace tapping through the invention
Angle is closely related, is not influenced by reasons such as weighing deviation of gravity center, reception device or transloading equipment impact fluctuations, realizes scene
In tapping casting, tilt angle that is quick, accurately obtaining electric furnace goes out iron, the parameters such as tapping flow velocity, and passes through output equipment
Intuitive display output, measurement accuracy is high, goes out iron with the acquisition of in time, the dynamic data of tapping flow pours for scene
The current-following inoculation technique of note process provides reliable reference frame.
Claims (7)
1. going out the weighing technique of iron during a kind of electric furnace tapping, which is characterized in that respectively include following process:
A) burner hearth cavity size three-dimensional models: the three-dimensional of burner hearth cavity is obtained according to original plan sheet or direct measurement method
Then size establishes the threedimensional model of hearth body by engineering software；
B) residual volume data acquisition in simulated hearth toppling process；Change of pitch angle process in simulated hearth toppling process, benefit
With three-dimensional software, start successively to chamfer threedimensional model along the corresponding angle point of the corresponding tapping hole of the threedimensional model, under scarf
The corresponding threedimensional model volume in side is to topple over the volume of remaining molten iron in above-mentioned mis-cut angle rear hearth, and mis-cut angle is from tapping
Corresponding 1 °~90 ° of the angle point of mouth is successively angularly incremented by value；The corresponding residual body product value of each mis-cut angle of list records respectively；
C) burner hearth dump angle and remaining molten steel quality half interval contour fitting: the corresponding residue of each mis-cut angle that B) process is obtained
Bulking value calculates the quality of remaining molten iron multiplied by molten iron density, and records B) in table listed by process, then by engineering software,
It carries out curve fitting respectively using burner hearth dump angle and remaining molten steel quality as input variable, selects suitable matched curve and calculate
Formula；
D) the measurement of burner hearth dump angle: the horizontal position mounted angle sensor in burner hearth outer, with real-time measurement furnace body phase
To the dump angle of horizontal plane；
E) go out the calculating of weight of iron: the flip angle angle value measured during D) substituted into C) the obtained matched curve of process calculate it is public
Formula calculates separately remaining molten steel quality M and tapping flow velocity V when different dump angles.
2. going out the weighing technique of iron during electric furnace tapping according to claim 1, which is characterized in that the C) mistake
Matched curve selects Quadratic Regression Fitting curve or cubic regression matched curve according to engineer application accuracy requirement in journey.
3. going out the weighing technique of iron during electric furnace tapping according to claim 1, which is characterized in that the B) process
In, the incremental spacing of the mis-cut angle is 1 °.
4. going out the weighing technique of iron during electric furnace tapping according to claim 1-3, which is characterized in that institute
The service life period for stating burner hearth is n times, and the every melting of burner hearth is using once, and the increase of burner hearth cavity volume is V, then n-th
When melt iron, the correction value of remaining molten steel quality is M in burner hearthAmendment,
MAmendment=(n-1) * V*(90- dump angle) ρ/90 *, then real surplus iron water amount is MIt is practical=M+MAmendment, ρ is that molten iron is close in formula
Degree.
5. going out the weighing technique of iron during electric furnace tapping according to claim 4, which is characterized in that the inclination angle passes
Sensor is connect with data processing module, and the data processing module is connect with output module, and the data processing module is according to inclining
Chamfer angle and the calculation formula of matched curve calculate remaining iron water amount and in due course tapping flow velocity, the output module in burner hearth and are used for
Export dump angle, remaining molten steel quality, tapping flow velocity and iron out.
6. going out the weighing technique of iron during electric furnace tapping according to claim 5, which is characterized in that the E) mistake
Journey, when calculating remaining iron water amount, in unit time 1s, the obliquity sensor is primary every 10ms value, after abnormal value elimination
It averages, which is substituted into matched curve calculation formula and obtains current residual molten steel quality.
7. going out the weighing technique of iron during electric furnace tapping according to claim 5, which is characterized in that the E) mistake
Journey is ▽ t seconds when molten iron starts to be poured onto molten iron to reach the time of ladle, then molten iron is at the T moment when calculating tapping speed
Tapping flow velocity are as follows: the remaining iron water amount of remaining iron water amount-(T-▽ t) second of (T-(▽ t+1)) second.
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| CN110930344B (en) * | 2018-08-29 | 2023-05-05 | 杭州海康威视数字技术股份有限公司 | Target quality determination method, device and system and electronic equipment |
| CN113834471A (en) * | 2021-10-18 | 2021-12-24 | 冠联工业互联网有限公司 | Online monitoring system for steel remaining amount of alloy furnace |
| CN114210961B (en) * | 2022-02-22 | 2022-06-14 | 秦皇岛秦冶重工有限公司 | Molten iron tipping control method, control system and molten iron tipping device |
| CN114626151A (en) * | 2022-02-23 | 2022-06-14 | 中冶南方工程技术有限公司 | Method for realizing design of tilting process of constant-flow tapping of pig casting machine |
| CN115178730B (en) * | 2022-08-05 | 2023-06-16 | 北京北方恒利科技发展有限公司 | Quantitative pouring device and method for copper alloy intermediate frequency furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6896032B1 (en) * | 2002-09-26 | 2005-05-24 | Hayes Lemmerz International, Inc. | Stopper-poured molten metal casting vessel with constant head height |
| CN102430725A (en) * | 2011-12-26 | 2012-05-02 | 大冶特殊钢股份有限公司 | Pouring speed indicating method and device for steel die casting |
| CN102909361A (en) * | 2012-11-14 | 2013-02-06 | 北京首钢国际工程技术有限公司 | Hot-metal bottle tipping device with weighing |
| CN104190883B (en) * | 2014-07-11 | 2016-01-13 | 共享装备股份有限公司 | A kind of electric furnace taps a blast furnace automatic stream inoculation device and current-following inoculation method automatically |
| CN204052823U (en) * | 2014-07-11 | 2014-12-31 | 宁夏共享装备有限公司 | A kind of electric furnace taps a blast furnace automatic stream inoculation device |
| CN106144653A (en) * | 2016-07-29 | 2016-11-23 | 侯马市东鑫机械铸造有限公司 | The automatic-feeding metered device in stokehold |
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