CN113832276A - Automatic control method for intelligent iron blocking port of blast furnace tapping - Google Patents
Automatic control method for intelligent iron blocking port of blast furnace tapping Download PDFInfo
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- CN113832276A CN113832276A CN202010578474.XA CN202010578474A CN113832276A CN 113832276 A CN113832276 A CN 113832276A CN 202010578474 A CN202010578474 A CN 202010578474A CN 113832276 A CN113832276 A CN 113832276A
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- taphole
- tapping
- mud
- blast furnace
- automatic control
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/12—Opening or sealing the tap holes
- C21B7/125—Refractory plugging mass
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2300/00—Process aspects
- C21B2300/04—Modeling of the process, e.g. for control purposes; CII
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses an automatic control method for intelligent iron blocking of blast furnace tapping, which comprises the following steps: performing automatic mud adding operation; detecting a signal of the iron flow; detecting a splashing state signal of the taphole; judging the opportunity of blocking the tap hole according to the empirical data, the tap hole splashing state signal and the tapping time; executing the lifting, advancing and retreating of the cover moving machine; and executing the iron notch blocking operation when the detection interlocking condition is met. The invention can combine historical data and empirical data to control the process of the taphole plugging of the blast furnace by using an intelligent judgment means and an automatic control means.
Description
Technical Field
The invention relates to a steel smelting control process, in particular to an intelligent automatic control method for a blast furnace tapping iron blocking hole.
Background
In blast furnace smelting, iron ore charged into a furnace is reduced into liquid molten iron (the part insoluble in the molten iron becomes slag) by using coke (part is replaced by coal powder, natural gas and the like), and the generated molten iron and slag are discharged through a taphole duct. At present, the existing time for plugging at home and abroad is judged by the experience of operators, plugging operation is realized by manually controlling a remote controller or a field control handle to operate a cover moving machine, a mud gun and the like step by step, and intelligent control means combining automatic detection and expert experience is not adopted to realize intelligent tapping plugging operation.
The existing blast furnace plugging operation flow is as follows: and after the gun head of the clay gun is cooled, cleaning operation is carried out, and after the cleaning operation is finished, the gun charging of the clay gun is carried out manually. When an operator judges the opportunity of blocking the taphole by manual experience, the remote controller is used for operating the mud gun test run and the cover moving machine test run step by step, purging the taphole, moving the A cover and the B cover out, rotating the mud gun, mud beating aiming at the taphole, maintaining pressure and pulling out the gun.
The Chinese patent CN201910625583.X, a temporary iron notch blocking device and an iron notch blocking method thereof disclose that the iron notch blocking operation is completed under the condition that a hydraulic mud gun fails to act, but the invention discloses a non-intelligent iron notch blocking operation method.
The chinese patent cn201721809082.x, blast furnace emergency taphole plugging tool, discloses a blast furnace emergency taphole plugging tool, but it is not an intelligent taphole plugging control method.
Therefore, although the prior art discloses a plurality of aspects in the steel smelting process, the prior art does not relate to an automatic iron notch blocking control method for intelligently controlling blast furnace tapping equipment.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide an intelligent automatic control method for a taphole of a blast furnace.
In order to achieve the purpose, the invention adopts the following technical scheme:
an intelligent automatic control method for a taphole of a blast furnace tapping comprises the following steps: performing automatic mud adding operation; detecting a signal of the iron flow; detecting a splashing state signal of the taphole; judging the opportunity of blocking the tap hole according to the empirical data, the tap hole splashing state signal and the tapping time; executing the lifting, advancing and retreating of the cover moving machine; and executing the iron notch blocking operation when the detection interlocking condition is met.
Further, performing an automatic mud adding operation includes: the mud gun is in a standby position; moving the AGV trolley to a framing position; the guide rail brake is opened, the mud adding robot trolley moves to a working position, and the guide rail brake is closed; detecting the position of the clay gun and the position of the clay basket; the mud adding robot grabs the stemming and rotates to the mud muzzle; filling the stemming until the stemming is full to a set value; returning the robot of the mud adding machine to the original position; the piston of the mud gun advances.
Further, detecting the taphole sputtering state signal comprises: and detecting the temperature presenting range around the taphole by using high-temperature infrared thermal imaging equipment to judge the splashing state of the taphole.
Further, the step of judging the moment of plugging the iron notch comprises the following steps: detecting the temperature of a hearth of the blast furnace; judging the tapping time, the emergency blocking condition and the current slag flow state of the previous tapping of the tapping hole; and (6) plugging an iron notch.
Further, the step of performing the lifting of the cover mover includes: reading a pressure change feedback signal of a hydraulic system in the lifting process of the blast furnace cover moving machine; the overflow valve installed in the hydraulic pipe detects the feedback of pressure change, if the detected pressure is reduced to the pressure raised in place
Judging that the cover moving machine is in place to lower the signal; and if the pressure change feedback pressure rises to a certain specific value (1.8MPa) and touches a mechanical limit, judging that the lifting signal of the cover moving machine is in place.
Further, the step of executing the advancing and retreating of the cover moving machine comprises the following steps: reading signals of a sensor arranged at the far end of the cover moving machine, wherein the sensor is connected with the oil cylinder, so that accurate positioning and signal detection can be realized; and whether the cover moving machine advances or retreats in place can be judged according to the sensor signal at the far end of the cover moving machine.
Further, the interlock conditions include: the automatic mud adding operation is finished, the tapping machine is in a standby position, the cover moving machine is in a standby position, and the position state of the mud gun is achieved.
Further, the taphole plugging operation comprises: the interlocking condition is satisfied; the cover moving machine is lifted to the right position and then retreated to the standby position; the mud gun is rotated forwards and operated to a preset position; mud is beaten, and the propelling quantity of a mud gun reaches a set value; keeping the pressure of the clay gun; closing the dust removal system; the water granulated slag stops running.
In the technical scheme, the method can be used for controlling the process of blocking the blast furnace taphole by combining historical data and empirical data and utilizing an intelligent judgment means and an automatic control means.
Drawings
FIG. 1 is a flow chart of the automatic control method for intelligent iron blocking port of blast furnace tapping;
FIG. 2 is a flow chart for performing an automatic mud adding operation;
FIG. 3 is a flow chart for determining the timing of plugging the taphole;
FIG. 4 is a flow chart for performing a lid mover raising and lowering operation;
FIG. 5 is a flow chart for performing a move operation of the canopy removing machine;
fig. 6 is a flowchart of the taphole plugging operation.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to fig. 1, the invention discloses an intelligent automatic control method for a taphole of a blast furnace. The method of the invention realizes the intelligent blocking operation of the blast furnace taphole by means of intelligent signal identification, intelligent blocking operation, automatic control and the like, and mainly comprises the following steps:
step 1: performing automatic mud adding operation;
step 2: detecting a signal of the iron flow;
and step 3: detecting a splashing state signal of the taphole;
and 4, step 4: judging the opportunity of blocking the tap hole according to the empirical data, the tap hole splashing state signal and the tapping time;
and 5: executing the lifting, advancing and retreating of the cover moving machine;
step 6: and executing the iron notch blocking operation when the detection interlocking condition is met.
Referring to fig. 2, in step 1, performing an automatic mud adding operation includes:
step 1.1: the mud gun is in a standby position;
step 1.2: after the taphole sends a taphole plugging signal and reaches a set time interval, a control program executes intelligent inspection, and when the interlocking conditions that the mud gun is in a standby position, the piston is retreated to the standby position, the robot trolley is in the standby position, the AGV trolley is in the standby position, no fault exists in signal detection, no fault exists in equipment, no operation action exists in other equipment at the taphole and the like are judged to be met, the AGV trolley runs to a framing position;
step 1.3: the guide rail brake is opened, the mud adding robot trolley moves to a working position, and the guide rail brake is closed;
step 1.4: detecting the position of the clay gun and the position of the clay basket;
step 1.5: the mud adding robot grabs the stemming and rotates to the mud muzzle;
step 1.6: loading stemming until the stemming is filled to a set value, executing automatic stemming adding operation according to the set stemming adding amount (the automatic stemming adding machine has an infrared detection signal to judge the residual clearance of the stemming added mud cylinder), stopping the stemming adding operation after the inherent control program of the automatic stemming adding machine judges that the stemming is added to the set value or the upper limit of the residual clearance of the mud cylinder,
step 1.7: returning the robot of the mud adding machine to the original position;
step 1.8: the piston of the mud gun advances.
In the step 1, an automatic mud adding machine control system for executing the automatic mud adding operation is controlled by an independent PLC, and the automatic mud adding operation of the mud gun is mainly completed. The control system comprises an automatic mode of the mud adding machine, a manual mode of the mud adding machine, a pause mode, an automatic start mode, an automatic pause mode, a fault alarm and reset processing mode, a centralized control room operation mode, a field operation mode and other operation modes; the method comprises the steps of detecting signals such as AGV electric quantity, AGV car number, opener angle, mud gun angle, oil quantity, pressure, mud jacking distance, mud loading height, mud adding quantity, mud gun piston position, communication, signal input and output control, automatic interlocking conditions and the like, and setting mud adding quantity and inputting an AGV route window; the manual control mode comprises a robot action instruction, a mud adding machine action instruction, a shedding machine action instruction, an AGV action instruction and the like.
As a preferred embodiment of the invention, the automatic mud feeder control system fault alarming and resetting processing diagnosis module for executing automatic mud feeding operation can check fault conditions and reasons, solutions, reset to normal and the like in real time.
In the step 2, the state of the slag flow is detected through the torque load of a rotary drum of the slag flushing system, and the state of the iron flow is measured through a rail weighbridge.
And 3, detecting whether the iron notch is sprayed or not by adopting high-temperature infrared thermal imaging equipment, and detecting the temperature presentation range around the iron notch by utilizing the high-temperature infrared thermal imaging equipment to judge the sputtering state of the iron notch. The high-temperature infrared thermal imaging equipment does not need a mechanical structure, can adjust the visual angle and is arranged on the air port platform supporting beam.
Referring to fig. 3, in step 4, the step of determining the iron notch plugging timing includes:
step 4.1: detecting the temperature of a hearth of the blast furnace;
step 4.2: judging the tapping time, the emergency blocking condition and the current slag flow state of the previous tapping of the tapping hole;
step 4.3: and sending an iron notch blocking instruction.
In step 4, the step of judging the moment of blocking the taphole integrates the empirical data, a program is compiled to intelligently judge the moment of blocking the taphole according to the video detection result of the taphole splashing state and the tapping time, and when the interlocking conditions (including the completion of the automatic mud adding operation, the standby position of the tapping machine, the standby position of the cover moving machine, the position state of the mud gun and the like) are detected according to the judgment result, a blocking control program is automatically executed. And the plugging control program calls an automatic control program of the cover moving machine and an automatic control program of the clay gun.
Referring to fig. 4 and 5, in step 5, performing the lifting operation of the cap mover includes the steps of:
step 5.1: reading a pressure change feedback signal of a hydraulic system in the lifting process of the blast furnace cover moving machine;
step 5.2: the overflow valve installed in the hydraulic pipe detects the feedback of pressure change, if the detected pressure is reduced to the pressure raised in place
And judging that the cover moving machine puts down signals in place.
Step 5.3: and if the pressure change feedback pressure rises to a certain specific value (1.8MPa) and touches a mechanical limit, judging that the lifting signal of the cover moving machine is in place.
Besides the lifting operation, the step 5 further executes the walking of the cover moving machine, namely the advancing and retreating of the cover moving machine, and mainly comprises the following steps:
step 5.4: reading signals of a sensor arranged at the far end of the cover moving machine, wherein the sensor is connected with the oil cylinder, so that accurate positioning and signal detection can be realized;
step 5.5: and whether the cover moving machine advances or retreats in place can be judged according to the sensor signal at the far end of the cover moving machine.
The automatic control system of the cover moving machine is controlled by a PLC (programmable logic controller), and the control system comprises operation modes such as automatic operation, manual operation, emergency stop, centralized control room operation, field operation and the like; detecting a state signal, an oil way pressure signal and an automatic interlocking condition signal of the cover moving machine; the manual control mode is realized by adopting a step control mode through an HMI system and comprises a step action instruction of the cover moving machine.
The automatic control system of the clay gun is controlled by a PLC and is mainly responsible for the automatic operation of the clay gun. The control system comprises operation modes such as automatic operation, manual operation, emergency stop, centralized control room operation, field operation and the like; detecting pressure signals, position signals, oil circuit pressure, automatic interlocking condition signals and the like; the manual control mode is realized through an HMI system and comprises a mud gun step action instruction.
Referring to fig. 6, in step 6, the taphole plugging operation includes:
step 6.1: judging that the interlocking condition is met;
step 6.2: the cover moving machine is lifted to the right position and then retreated to the standby position;
step 6.3: the mud gun is operated to a preset position;
step 6.4: the clay gun rotating oil cylinder rotates forwards until the rotating pressure of the clay gun is in place, the clay gun is pushed until the pushing amount reaches a set value,
step 6.5: the mud gun hydraulic system keeps pressure;
step 6.6: closing the dust removal system;
step 6.7: after about 5 minutes, the granulated slag stopped running.
In step 6, the automatic iron notch plugging control system for executing the iron notch plugging operation is controlled by a PLC (programmable logic controller), and realizes linkage of actions between the cover moving machine and the mud gun. The control system comprises automatic, manual and emergency stop operation modes; and (4) judging interlocking conditions, including mud adding ending, a cover moving machine signal, a mud gun piston signal, a mud gun pressure signal and the like. And if the pressure of the hydraulic oil of the mud gun is not in place, executing a gun retreating instruction.
As a preferred embodiment of the invention, the automatic control program of the invention comprises an automatic control system of a cover moving machine, an automatic control system of a mud gun and an automatic control system of a taphole, wherein the signal results detected by a sensor, an encoder, laser, infrared camera shooting and the like are connected into a PLC of a controller of a field opening, a taphole and a single equipment control program in a hard wiring or network communication mode, the program in the PLC carries out various logic function operations through detection signals and expert instructions, and has yes and no feedback, when yes is met, the relevant equipment is controlled to be linked, and if no is fed back, relevant alarm pictures and fault conditions are automatically popped up to guide an operator to remove faults. Through signal detection and various logic operations and 'yes' and 'no' feedback, closed-loop accurate control can be achieved.
As another preferred embodiment of the invention, the automatic mud adding machine and the mud cannon are both provided with sound-light alarms, and before the intelligent execution action, the sound-light alarms are firstly sent out to remind surrounding personnel of evacuating.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (8)
1. An intelligent automatic control method for a taphole of a blast furnace tapping is characterized by comprising the following steps:
performing automatic mud adding operation;
detecting a signal of the iron flow;
detecting a splashing state signal of the taphole;
judging the opportunity of blocking the tap hole according to the empirical data, the tap hole splashing state signal and the tapping time;
executing the lifting, advancing and retreating of the cover moving machine;
and executing the iron notch blocking operation when the detection interlocking condition is met.
2. The automatic control method for the intelligent iron blocking port of the blast furnace tapping as claimed in claim 1, wherein the performing of the automatic mud adding operation comprises:
the mud gun is in a standby position;
moving the AGV trolley to a framing position;
the guide rail brake is opened, the mud adding robot trolley moves to a working position, and the guide rail brake is closed;
detecting the position of the clay gun and the position of the clay basket;
the mud adding robot grabs the stemming and rotates to the mud muzzle;
filling the stemming until the stemming is full to a set value;
returning the robot of the mud adding machine to the original position;
the piston of the mud gun advances.
3. The intelligent automatic control method for the taphole for the tapping of the blast furnace as claimed in claim 1, wherein the detecting the taphole splash status signal comprises:
and detecting the temperature presenting range around the taphole by using high-temperature infrared thermal imaging equipment to judge the splashing state of the taphole.
4. The intelligent automatic control method for the taphole for tapping the blast furnace according to claim 1, wherein the step of determining the taphole plugging time comprises:
detecting the temperature of a hearth of the blast furnace;
judging the tapping time, the emergency blocking condition and the current slag flow state of the previous tapping of the tapping hole;
and sending an iron notch blocking instruction.
5. The intelligent automatic control method for the taphole for tapping of the blast furnace according to claim 1, wherein the step of performing the lifting of the moving cover machine comprises:
reading a pressure change feedback signal of a hydraulic system in the lifting process of the blast furnace cover moving machine;
the overflow valve installed in the hydraulic pipe detects the feedback of pressure change, if the detected pressure is reduced to the pressure raised in place
Judging that the cover moving machine is in place to lower the signal;
and if the pressure change feedback pressure rises to a certain specific value (1.8MPa) and touches a mechanical limit, judging that the lifting signal of the cover moving machine is in place.
6. The intelligent automatic control method for the taphole of the blast furnace tapping as set forth in claim 1, wherein the step of executing the advancing and retreating of the moving cover machine comprises:
reading a signal of a sensor arranged at the far end of the cover moving machine, wherein the sensor is connected with an oil cylinder;
and judging whether the cover moving machine advances or retreats in place according to a sensor signal at the far end of the cover moving machine.
7. The intelligent automatic control method for the taphole of the blast furnace tapping as set forth in claim 1, wherein the interlocking condition comprises:
the automatic mud adding operation is finished, the tapping machine is in a standby position, the cover moving machine is in a standby position, and the position state of the mud gun is achieved.
8. The intelligent automatic control method for the taphole for tapping the blast furnace according to claim 1, wherein the taphole plugging operation comprises:
the interlocking condition is satisfied;
the cover moving machine is lifted to the right position and then retreated to the standby position;
the mud gun is rotated forwards and operated to a preset position;
mud is beaten, and the propelling quantity of a mud gun reaches a set value;
keeping the pressure of the clay gun;
closing the dust removal system;
the water granulated slag stops running.
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Cited By (3)
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| CN115198046A (en) * | 2022-08-12 | 2022-10-18 | 马鞍山钢铁股份有限公司 | Method for automatically starting and stopping blast furnace stokehole slag flushing equipment |
| CN115505659A (en) * | 2022-09-14 | 2022-12-23 | 山西太钢不锈钢股份有限公司 | Method for improving blast furnace front tapping |
| CN115595388A (en) * | 2022-10-14 | 2023-01-13 | 合肥视展光电科技有限公司（Cn） | Blast furnace tapping operation control method based on molten iron flowing state and electronic equipment |
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| CN115505659A (en) * | 2022-09-14 | 2022-12-23 | 山西太钢不锈钢股份有限公司 | Method for improving blast furnace front tapping |
| CN115595388A (en) * | 2022-10-14 | 2023-01-13 | 合肥视展光电科技有限公司（Cn） | Blast furnace tapping operation control method based on molten iron flowing state and electronic equipment |
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