CN101942537B - On-line detection method of blast furnace slag quantity - Google Patents
On-line detection method of blast furnace slag quantity Download PDFInfo
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- CN101942537B CN101942537B CN2010102787738A CN201010278773A CN101942537B CN 101942537 B CN101942537 B CN 101942537B CN 2010102787738 A CN2010102787738 A CN 2010102787738A CN 201010278773 A CN201010278773 A CN 201010278773A CN 101942537 B CN101942537 B CN 101942537B
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Abstract
The invention provides an on-line detection method of blast furnace slag quantity, which aims to indirectly measure the blast furnace slag quantity by using current variation of a dehydration drum under variable frequency control of a blast furnace wheel method water granulated slag disposal system. In the invention, as current of the dehydration drum is proportional to grain slag and slag-washing water in the drum within a certain range, a current signal of a frequency converter of the dehydration drum of the furnace-process slag disposal system is transferred to a blast furnace PLC system by network or a point-to-point communication manner and then transferred to a process computer system for statistics, calculation and display through the PLC system; and a process computer performs real-time statistics of measurement of current, actual tapping quantity and weight of a transport slag pot car for a period of time, and different current of the dehydration drum is subject to data analysis to indirectly obtain the actual slag quantity of a blast furnace.
Description
Technical field
The present invention relates to the online test method that goes out the quantity of slag that a kind of ferrous metallurgy blast furnace ironmaking produces.
Background technology
The steady direct motion of blast furnace operating is the key that blast furnace is produced, and that grasps in time that blast furnace ironmaking produces goes out quantity of slag situation, in time understands and grasp the harmony of tapping a blast furnace, for improving blast furnace permeability and smooth operation of furnace production has significance.The online quantity of slag that detects helps effectively judging conditions of blast furnace, also is beneficial to safety and taps a blast furnace and the maintenance of iron mouth.The tap cinder quantity measuring method has three kinds usually at present: the one, on the grain slag travelling belt, weighing belt is installed, and this Measuring and testing has higher requirement to installation environment, and maintenance is bigger; The 2nd, through transportation tank car metering, this mode is because serious lag can not in time reflect the blast furnace casting situation of slagging tap; The 3rd, rely on experienced shift foreman's range estimation, this artificial judgement randomness error is big, is unfavorable for the become more meticulous production and the standardized operation of blast furnace.
Summary of the invention
The present invention seeks to overcome the problems referred to above, provide a kind of electric current of the dehydration tumbler of blast furnace wheel method grain slag treatment system VFC that utilizes to change the next tap cinder of measurement indirectly amount, the tap cinder amount online test method of convenient foundation directly perceived is provided for judging conditions of blast furnace.
The inventive method is:
(1) when the blast furnace casting slagging, the high-temperature slag that produces in the smelting process flows in the pelletizer of wheel method grain slag treatment system through slag runner, makes the abundant Quench granulation of slag, and the grain slag particle of Quench and flushing cinder water flow into and filters in the dehydration tumbler and promote.
Electric current and grain slag in the rotating cylinder and the proportional within the specific limits relation of flushing cinder water because of dehydration tumbler:
Q
si＝k×k
jz(I
ti-I
t0) (1)
In the formula: Q
SiBe i grain slag amount constantly, unit is t/min; I
TiBe i rotating cylinder electric current constantly, unit is A; I
T0Be the electric current sum of rotating cylinder no-load current and flushing cinder water consumption, unit is A; K is a gain factor; k
JzBe IC; I=1,2 ... N is i collection period of computer statistics calculating.
Then go out the quantity of slag: Q at every turn
s=∑ Q
Si(2)
(2) dehydration tumbler dewaters to grain slag in lifting process, and the grain slag after the dehydration is delivered to by rotary conveyor through chute and deposited the slag field.
(3) signal such as electric current, rotating speed that will take turns method grain slag treatment system dehydration tumbler frequency transformer is delivered to the PLC system of blast furnace through network or point-to-point communication form, reaches process computer (L2) system by the PLC system again and carries out conversion Calculation, statistics and demonstration.
The dehydration tumbler frequency transformer adopts siemens MICROMASTER MM440, and blast furnace PLC adopts siemens S7 series, and process computer is selected IBM x3850 for use.
(4) utilize the weight metering of the electric current of process computer (L2) real-time statistics for some time (being not less than 15 days), the actual amount of tapping a blast furnace and transportation slag car; Binding isotherm scum ratio, the theory amount of tapping a blast furnace, theory go out under the quantity of slag and the different quantity of slag situation workman to the adjusting strategy of rotating speed; Corresponding different dehydration tumbler electric currents carry out data analysis, calculate the electric current sum I of segmentation numerical value, rotating cylinder no-load current and the flushing cinder water consumption of the gain factor k in the formula (1)
T0, regulate the load variations of bringing with compensating rotational speed.
(5) process computer (L2) calculates according to formula (1) and (2) and goes out quantity of slag Q at every turn
s, the actual slag car metering of binding isotherm scum ratio, the actual amount of tapping a blast furnace and for some time, adjustment k
JzValue makes it minimum with actual deviation.
k
JzValue can be carried out artificial adjustment through the man-machine interface HMI of computer system: the quantity of slag and actual of calculating that counts nearest for some time in (as 15 days) goes out the quantity of slag, k
JzValue is the ratio of actual value with calculated value.k
JzValue also can be revised at computer background automatically: the theory that counts nearest for some time in (as 15 days) goes out the quantity of slag and calculates the quantity of slag, k
JzValue is the ratio of theoretical value with calculated value.Theory goes out the quantity of slag=actual amount of tapping a blast furnace * ton scum ratio.
The present invention utilizes the frequency-variable controller of blast furnace wheel method grain slag treatment system dehydration tumbler and the computer system of blast furnace; Through network and point-to-point communication form the inverter current signal is sent to the blast furnace computer system; Calculate thus and instantaneously go out the quantity of slag and the total quantity of slag when at every turn tapping a blast furnace; Through the online demonstration in computer operator station interface, realize real-time follow-up to the tap cinder amount, for the blast furnace section chief judges tap cinder situation and conditions of blast furnace convenient, directly perceived, active data foundation is provided.The present invention can be because of receiving condition restriction such as environment, can't installing under the situation of blast furnace granulated slag measuring belt scale; A kind of online indirect measurement method that goes out the quantity of slag is provided; Change to rely on and estimate the big situation of artificial judgement randomness error, and utilize the computer statistics function, revise k
JzValue and It
0
Description of drawings
Fig. 1 is a data transmission scheme of the present invention.
Embodiment
The inventive method is at the 1800m of Taiyuan Iron & Steel Group Co., Ltd.
3Use on the blast furnace.Blast furnace operation and equipment are various, and the grain slag system belongs to the blast furnace peripheral auxiliary equipment, and blast-furnace body computer system and grain slag dehydration tumbler frequency transformer do not have direct data gathering and get in touch.Therefore adopt the multi-stage data load mode, the current signal of grain slag dehydration tumbler frequency transformer finally is sent to the blast furnace process computer system calculates and show.
Grain slag rotary drum frequency transformer is delivered to grain slag PLC system through network with data such as electric currents; Grain slag PLC system is through point-to-point (also can adopt network) form; Data are delivered to blast-furnace body PLC system; Blast-furnace body PLC system sends data into the blast furnace process computer system, carries out conversion Calculation, statistics and demonstration.Concrete grammar is:
(1) in (lectotype selection: siemens MM-440) increase the PROFIBUS communication board, data such as the running status of rotary drum motor, electric current, speed, torque are sent into grain slag PLC (lectotype selection: system siemens S7-300) through the PROFIBUS-DP bus of grain slag rotary drum frequency transformer.The mailing address identical with grain slag PLCS7-300 is set on the PROFIBUS communication board of frequency transformer side, and it is following that messaging parameter is set:
The P918=4 mailing address;
It is status word that P2051.0=0052 sends first word to S7-300;
It is speed actual value that P2051.1=0021 sends second word to S7-300;
It is that status word is the torque actual value that P2051.2=0031 sends the 3rd word to S7-300;
It is that status word is a current actual value that P2051.3=0027 sends the 4th word to S7-300;
(2) grain slag PLC is carried out hardware configuration, in the Profibus of grain slag PLC DP bus, add frequency conversion equipment, the mailing address of frequency transformer is set, the communication zone of configuration MM440, the affirmation communication type is PPO1, that is:
The data of frequency transformer and 6 bytes of S7-300 exchange, wherein first word is the status word of frequency transformer, and second word is a speed, and the 3rd word is torque, and the 4th word is electric current.A state of the corresponding frequency transformer of each of status word therefrom can be differentiated the state of frequency transformer, and the value of 2-4 word is from the corresponding 0-ratings of 0-32678.
Programmed process is according to this sent into blast-furnace body PLC (lectotype selection: the analogue input template of system siemens S7-400) with data such as the speed of rotary drum motor, electric current, torques through the analog quantity output template.Grain slag PLC analog quantity output template address PQW320, PQW324, blast-furnace body PLC analogue input template address PIW2920, PIW2924.
(3) blast-furnace body PLC reads electric current, the tach signal of the rotary drum motor that grain slag PLC sends here; Through (the lectotype selection: IBM xSeries 3650), send into process control computer (L2) (lectotype selection: IBM x3850) of basic automatization (L1) I/O server with the OPC communications protocol.
(4) sampling period of assignment procedure control computer is 5 seconds, calculates the grain slag amount according to formula (1) and formula (2), the actual slag car metering of binding isotherm scum ratio, the actual amount of tapping a blast furnace and for some time, adjustment kjz value and It
0
Actual computation: formula (1) Qsi=k * kjz (Iti-It
0) and formula (2) Qs=∑ Qsi in, get IC kjz=0.1428, k, It
0Span such as following table:
| I ti-I t?0(A) | k | I t0(A) |
| ≤0 | 0 | |
| 0～5 | 227.4～179.3 | 132 |
| 5～20 | 179.3～101.6 | 132 |
| 20～40 | 101.6～57.5 | 132 |
| 40～68 | 57.5～38.6 | 132 |
| ≥68 | 38.6 | 132 |
System adjusts IC according to the deviation between calculated value and the actual computation value in one period.Can surplus, the rate variation trend of tapping a blast furnace and slag tap be shown with graphics mode through computer operator station, make things convenient for the section chief that the output of iron and slag is carried out analysis and judgement.
Claims (5)
1. tap cinder amount online test method is characterized in that:
(1) when the blast furnace casting slagging, the high-temperature slag that produces in the smelting process flows in the pelletizer of wheel method grain slag treatment system through slag runner, makes the abundant Quench granulation of slag, and the grain slag particle of Quench and flushing cinder water flow into and filters in the dehydration tumbler and promote;
Electric current and grain slag in the rotating cylinder and the proportional within the specific limits relation of flushing cinder water because of dehydration tumbler:
Q
si＝k×k
jz(I
ti-I
t0) (1)
In the formula: Q
SiBe i grain slag amount constantly, unit is t/min; I
TiBe i rotating cylinder electric current constantly, unit is A; I
T0Be the electric current sum of rotating cylinder no-load current and flushing cinder water consumption, unit is A; K is a gain factor; k
JzBe IC; I=1,2 ... N is i collection period of computer statistics calculating;
Go out the quantity of slag: Q at every turn
s=∑ Q
Si(2)
(2) dehydration tumbler dewaters to grain slag in lifting process, and the grain slag after the dehydration is delivered to by rotary conveyor through chute and deposited the slag field;
(3) current signal that will take turns method grain slag treatment system dehydration tumbler frequency transformer is delivered to the PLC system of blast furnace through network or point-to-point communication form, reaches process computer by the PLC system again and adds up, calculates and show;
(4) utilize the process computer real-time statistics to go out the weight metering of the electric current in for some time, the actual amount of tapping a blast furnace and transportation slag car, this section period should be not less than 15 days; Binding isotherm scum ratio, the theory amount of tapping a blast furnace, theory go out under the quantity of slag and the different quantity of slag situation workman to the adjusting strategy of rotating speed; Corresponding different dehydration tumbler electric currents carry out data analysis, calculate the electric current sum I of segmentation numerical value, rotating cylinder no-load current and the flushing cinder water consumption of the gain factor k in the formula (1)
T0, regulate the load variations of bringing with compensating rotational speed;
(5) process computer calculates according to formula (1) and (2) and goes out quantity of slag Q at every turn
s, binding isotherm scum ratio, the actual amount of tapping a blast furnace and the actual slag car of for some time measure adjusts k
JzValue makes it minimum with actual deviation.
2. tap cinder amount online test method as claimed in claim 1 is characterized in that k
JzThe man-machine interface HMI of value through computer system carries out artificial adjustment: the quantity of slag and actual of calculating that counts in nearest for some time goes out the quantity of slag, k
JzValue goes out the quantity of slag and the ratio that calculates the quantity of slag for actual.
3. tap cinder amount online test method as claimed in claim 1 is characterized in that k
JzValue is revised at computer background automatically: the theory that counts in nearest for some time goes out the quantity of slag and calculates the quantity of slag, k
JzValue goes out the quantity of slag and the ratio that calculates the quantity of slag for theory; Theory goes out the quantity of slag=actual amount of tapping a blast furnace * ton scum ratio.
4. according to claim 1 or claim 2 tap cinder amount online test method is characterized in that for some time of adding up usefulness was advisable with 15 days.
5. tap cinder amount online test method as claimed in claim 1 is characterized in that the dehydration tumbler frequency transformer adopts siemens MICROMASTER MM440, and blast furnace PLC adopts siemens S7 series, and process computer is selected IBM x3850 for use.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102787738A CN101942537B (en) | 2010-09-09 | 2010-09-09 | On-line detection method of blast furnace slag quantity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102787738A CN101942537B (en) | 2010-09-09 | 2010-09-09 | On-line detection method of blast furnace slag quantity |
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| CN101942537B true CN101942537B (en) | 2012-05-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102492795B (en) * | 2011-12-15 | 2014-06-18 | 武汉钢铁(集团)公司 | Control system for pulverized coal making of pulverized coal injection |
| CN102660656B (en) * | 2012-04-19 | 2014-08-06 | 中冶南方工程技术有限公司 | Speed control system and speed control method for granulating and dewatering rotary drum of blast furnace |
| CN103642958B (en) * | 2012-11-09 | 2015-07-01 | 中冶南方工程技术有限公司 | Method for controlling temperature of slag flushing water at cooling tower outlet in blast furnace slag treating system |
| CN104020796A (en) * | 2013-03-02 | 2014-09-03 | 山西太钢不锈钢股份有限公司 | Blast furnace water slag deslagging rotary drum torque signal control method |
| CN103993113B (en) * | 2014-06-04 | 2015-11-04 | 中冶南方工程技术有限公司 | A kind of tap cinder amount online test method |
| CN104131126B (en) * | 2014-08-07 | 2016-06-29 | 中冶南方工程技术有限公司 | Blast furnace cinder flow rate testing methods based on fuzzy model |
| CN109142239A (en) * | 2018-07-23 | 2019-01-04 | 合肥金星机电科技发展有限公司 | The matte control system of falling slag |
| CN110283956A (en) * | 2019-07-25 | 2019-09-27 | 马鞍山钢铁股份有限公司 | Whether go out most devices and methods therefor for rational judgment Blast furnace slag |
| TWI700372B (en) * | 2019-09-11 | 2020-08-01 | 中國鋼鐵股份有限公司 | Blast furnace facility and monitoring method for liquid level of slag of blast furnace |
| CN110938727B (en) * | 2019-12-17 | 2022-06-21 | 中冶南方工程技术有限公司 | Method for weighing converter slag remaining amount |
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| CN101240357A (en) * | 2008-03-05 | 2008-08-13 | 山西太钢不锈钢股份有限公司 | Oversized blast furnace iron slag discharge monitoring method and hearth iron slag quantity monitoring method |
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