CN113005254A

CN113005254A - Unmanned intelligent steelmaking system and steelmaking method

Info

Publication number: CN113005254A
Application number: CN202110200880.7A
Authority: CN
Inventors: 刘俊宝; 宁伟; 王强; 尚游; 李少帅; 高志滨; 康凤梅
Original assignee: Shandong Iron and Steel Co Ltd
Current assignee: Shandong Iron and Steel Co Ltd
Priority date: 2021-02-23
Filing date: 2021-02-23
Publication date: 2021-06-22

Abstract

The invention provides an unmanned intelligent steelmaking system and a steelmaking method, wherein the steelmaking system comprises a steelmaking process control subsystem, a converter smelting execution subsystem, a tapping subsystem, a slag pouring subsystem, a slag splashing subsystem, an alloy metering subsystem, an alloy weighing primary control system and an infrared slag discharging detection system, wherein the steelmaking process control subsystem sends instructions to the converter smelting execution subsystem, the smelting end point judgment subsystem, the tapping subsystem, the slag pouring subsystem, the slag splashing subsystem, the alloy metering subsystem and the alloy weighing primary control system and receives returned data; the steelmaking process control subsystem is also used for executing steelmaking material metering management, steelmaking test management and smelting end point judgment. The invention can realize the unmanned steelmaking, reduce the personnel allocation in the steelmaking workshop, standardize the steelmaking operation, reduce the influence of the manual misoperation on the steelmaking process, further improve the working environment of steelmaking operators and reduce the labor intensity of workers.

Description

Unmanned intelligent steelmaking system and steelmaking method

Technical Field

The invention relates to the technical field of steel making, in particular to an unmanned intelligent steel making system and an automatic steel making method.

Background

At present, steel enterprises adopt an operation mode of coordination and cooperation of a ground commander, a crown block driver and steel-making operators in steel-making workshops. The mode has the defects of low operation rate, irregular operation, frequent misoperation accidents caused by human factors, high labor cost, poor working environment and danger of field operators and the like.

Nowadays, the artificial intelligence technology is highly developed, and on the premise of ensuring production safety and smooth production, the unmanned automation of the steelmaking process can be completely realized, so that the production efficiency can be effectively improved, the personnel allocation of a steelmaking workshop is reduced, the steelmaking operation is standardized, the influence of manual misoperation on the steelmaking process is reduced, the working environment of steelmaking operators is improved, and the labor intensity of workers is reduced.

Therefore, it is necessary to provide an automatic steelmaking method to solve the above problems.

Disclosure of Invention

The invention aims to provide an unmanned intelligent steelmaking system and an automatic steelmaking method, the steelmaking method has high intelligent degree, reduces the labor intensity of workers, and can effectively avoid iron spilling accidents.

In order to achieve the purpose, the invention adopts the following technical scheme:

an unmanned intelligent steelmaking system comprises a steelmaking process control subsystem, a converter smelting execution subsystem, a smelting end point judgment subsystem, a tapping subsystem, a slag pouring subsystem, a slag splashing subsystem, an alloy metering subsystem, an alloy weighing primary control system and an infrared slag discharge detection system;

the steelmaking process control subsystem sends instructions to the converter smelting execution subsystem, the smelting end point judgment subsystem, the steel tapping subsystem, the slag pouring subsystem, the slag splashing subsystem, the alloy metering subsystem and the alloy weighing primary control system and receives returned data;

the steelmaking process control subsystem is also used for executing steelmaking material metering management, steelmaking test management and smelting end point judgment;

the converter smelting execution subsystem is used for controlling blowing, smoke hood lifting, oxygen gun lifting, slag scraping and furnace shaking in the converter smelting process;

the steel tapping subsystem is used for controlling steel tapping after the smelting of the converter is finished;

the slag pouring subsystem is used for controlling pouring of smelting slag in the converter after tapping of the converter is finished;

the slag splashing subsystem is used for controlling slag splashing furnace protection operation after tapping is finished;

the alloy metering subsystem is used for calculating the amount of alloy required to be added;

the alloy weighing primary control system is added into the molten smelting steel in the tapping process according to the alloy adding amount calculated by the alloy metering subsystem;

the infrared slag falling detection system is used for identifying the converter molten steel and the steel slag.

A steelmaking method based on the unmanned intelligent steelmaking system comprises the following steps:

s1: starting the heat;

s2: the steelmaking process control subsystem sends a smelting instruction to the converter smelting execution subsystem, and the converter smelting execution subsystem carries out blowing, smoke hood lifting, oxygen lance lifting, slag scraping and furnace shaking according to the steel grade to be smelted;

s3: after smelting starts, the steelmaking process control subsystem sends an alloy calculation instruction to the alloy metering subsystem, and after the alloy metering subsystem receives the instruction, an alloy adding mode is automatically selected according to the type of smelted steel and raw material loading information, and the alloy required to be added is automatically calculated and sent to the alloy weighing primary control system;

s4: when the end point of smelting is reached, according to the feedback data information, the steelmaking process control subsystem carries out sampling detection on the end point component of converter smelting, judges whether the detection result is qualified or not, and selects a tapping mode according to the judgment result;

s5: the steelmaking process control subsystem judges that the end point smelting components are qualified, and then the steelmaking process control subsystem sends an instruction to the steel subsystem to carry out tapping operation;

s6: in the tapping process, the steelmaking process control subsystem sends an alloy adding instruction to the alloy metering subsystem according to the type of steel to be smelted, and the alloy to be added is added into the molten steel;

s7: the infrared slag discharging detection system detects slag discharging of the steel tapping hole, sends an instruction to close the sliding plate and lifts the furnace to a zero position;

s8: after receiving the zero-position information, the steelmaking process control subsystem sends an instruction to the slag pouring subsystem to perform slag pouring operation;

s9: after the slag pouring is finished, feeding back data information to the steelmaking process control subsystem, and sending an instruction to the slag splashing subsystem by the steelmaking process control subsystem according to the fed back data information to carry out slag splashing furnace protection operation;

s10: and finishing the heat.

In the step S2, the smelting performed by the converter smelting performing subsystem according to the steel grade to be smelted may specifically include the following steps:

after the converter smelting execution subsystem receives the instruction sent by the steelmaking process control subsystem, the oxygen lance lifting mechanism controls the oxygen lance to descend to open oxygen and strike fire, and blowing is started; when the blowing time is 1 minute and 30 seconds, the smoke hood lifting mechanism lowers the smoke hood to the lower limit; blowing for 12min, and lifting the smoke hood to an upper limit position until the blowing is finished; after the blowing is finished, extracting the lance and shutting off oxygen; after the oxygen is closed for 4s, the oxygen lance is lifted to the lance position of the lance opening, and the oxygen purging furnace opening is opened; and after the furnace mouth is completely swept, the lance is lifted, the slag scraper is closed when the lance is lifted to a position above a waiting position, the lance is stopped when the lance is lifted to an upper limit position by the oxygen lance, and the slag scraper is opened at the moment.

In the step S4, the steelmaking process control subsystem performs component qualification determination, waits for 3min after an oxygen blowing end signal, and the alloy metering subsystem and the alloy weighing primary control system perform alloy calculation and weighing, and the four conditions are handled:

1) if the detection result of the sampling and measuring of the smelting components by the steelmaking process control subsystem is returned within 3min and the judgment is qualified, the steelmaking process control subsystem sends a direct tapping instruction to the tapping subsystem;

2) if the steel-making process control subsystem is within 3min, the detection result of sampling and measuring the smelting components is returned, but the judgment is unqualified, and manual steel tapping is carried out;

3) if waiting for 3min, the steelmaking process control subsystem samples and determines that the detection result of the smelting components does not return, then the manual judgment is qualified, and steel is tapped;

4) and if tapping is started, the steel-making process control subsystem samples and measures the detection result of the smelting components and returns, the operator judges that the components are unqualified, and the tapping is carried out manually.

In step S5, the tapping performed by the tapping subsystem may specifically include the following steps:

judging the steel tapping to be qualified, and starting a pump; -15 ° off slide; opening the sliding plate when the furnace is shaken to-85 ℃; opening the sliding plate at-60 degrees after the steel is placed; -15 ° furnace pause 5 s; and the pump is automatically turned off at zero position.

In step S8, the deslagging operation performed by the deslagging subsystem may specifically include the following steps:

after tapping is finished, lifting the furnace to a zero position and waiting for more than 4 seconds, and starting to execute an automatic furnace shaking and slag pouring program;

automatic furnace shaking and slag pouring procedure: when the slag is poured, the furnace is shut down when the furnace is shaken to be more than 100 degrees, the subsequent furnace shaking angle is 1 degree each time, and the time interval between each time of furnace shaking is 3 s; and lifting the furnace to the zero position after the slag pouring is finished.

In step S9, the slag splashing operation performed by the slag splashing subsystem may specifically include the following steps:

after the converter is shaken to the zero position, waiting for more than 4s, and starting to perform slag splashing; after slag splashing is finished, the gun is lifted and nitrogen is closed.

After the heat of the invention is finished, when the oxygen lance is lifted to a waiting position, the heat of the invention is manually turned on to finish a signal, and the next molten steel furnace is prepared for smelting.

In the invention, each step of S1-S10 is provided with emergency manual processing, and the program execution of each subsystem can be forcibly terminated.

The unmanned intelligent steelmaking system is based on the existing converter steelmaking process control subsystem, the converter smelting execution subsystem, the steel tapping subsystem, the slag dumping subsystem, the slag splashing subsystem, the alloy metering subsystem and the alloy weighing primary control system, and the systems are integrated in a unified manner through real-time data acquisition and transmission among the subsystems, so that the full-flow unmanned intelligent control and management of the converter steelmaking production are realized.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides an unmanned intelligent steelmaking system and an automatic steelmaking method, which realize unmanned intelligent steelmaking control, reduce personnel allocation in a steelmaking workshop, standardize steelmaking operation, reduce the influence of manual misoperation on a steelmaking process, effectively avoid iron spilling accidents, further improve the working environment of steelmaking operators and reduce the labor intensity of workers.

Drawings

FIG. 1 is a flow chart of the unmanned intelligent steelmaking method of the present invention.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments.

Example 1

An unmanned intelligent steelmaking system comprises a steelmaking process control subsystem, a converter smelting execution subsystem, a steel tapping subsystem, a slag pouring subsystem, a slag splashing subsystem, an alloy metering subsystem, an alloy weighing primary control system and an infrared slag discharging detection system;

the infrared slag detection system is used for identifying the molten steel and the steel slag of the converter, is a set of steel tapping steel slag identification and detection control system based on the thermal image principle, automatically identifies the molten steel and the steel slag by utilizing the difference of the thermal radiance of the molten steel and the steel slag in a specific far infrared band range, and gives out sound and light alarm when the content of the steel tapping steel slag is greater than a set value, and particularly can be a VD2000 infrared converter/electric furnace slag detection system.

The converter smelting execution subsystem can comprise converter tilting automatic control, ladle car operation positioning, ladle liquid level monitoring and the like.

All subsystems and functional modules of the converter production system are controlled in a unified operation mode, so that all process flows and equipment of converter steelmaking production are comprehensively controlled and managed, and unmanned intelligent steelmaking is achieved.

Hardware platform of unmanned intelligent steelmaking system:

PC Server, PC client, industrial Ethernet, PLC control system equipment.

A software platform:

windows Server 2016 Chinese Standard edition, Microsoft SQL Server 2016 Chinese Standard edition, KEP Server EX, Microsoft Visual studio 2017.

Example 2

As shown in fig. 1, an automated steelmaking method based on the system described in embodiment 1 includes the following steps:

firstly, starting a heat:

and after the charging of the converter is finished, the steelmaking process control subsystem selects the smelting mode of the converter according to the collected molten iron composition information.

Secondly, unmanned intelligent blowing (realized based on the existing converter smelting execution subsystem):

1. after the mode is selected, the steelmaking process control subsystem sends a smelting instruction to the converter smelting execution subsystem, and the oxygen lance lifting mechanism controls the oxygen lance to descend to open oxygen and strike fire to start blowing;

2. converting for 1min for 30s, and lowering the smoke cover to a lower limit by a smoke cover lifting mechanism;

3. and (4) converting for 12min, and lifting the smoke hood to an upper limit position by the smoke hood lifting mechanism until converting is finished.

4. In the smelting process, the alloy metering subsystem runs an alloy automatic calculation program, and the alloy weighing primary control system runs a weighing program.

5. The blowing process and the bulk material feeding mode are in a computer mode.

Thirdly, automatically calculating and weighing the alloy;

1. alloy base information management

Managing and maintaining the alloy basic information such as alloy types, components, absorptivity and the like.

2. Automatic calculation and confirmation of alloy addition

Automatically calculating the amount of alloy to be added according to the process standard and the production requirement of the smelting steel grade, and starting to execute the automatic alloy adding operation according to the process flow after the alloy is confirmed to be correct.

3. Alloy automatic weighing

After the addition amount of the alloy is confirmed, sequencing is carried out according to the time sequence of the blowing starting signals of each converter so as to obtain the use right of the alloy trolley.

And after the use right of the alloy trolley is obtained, automatically weighing the alloy trolley according to the adding amount of each alloy, and conveying the alloy trolley to a proper position through a belt to prepare for adding.

4. Automatic addition of alloy

And in the tapping process, automatically adding the added alloy into the steel ladle according to the process requirement.

Fourthly, automatically purging a furnace mouth and automatically scraping slag:

1. after the blowing is finished (an oxygen blowing end signal), lifting the lance and closing oxygen;

2. after the oxygen is closed for 4s, the oxygen lance is lifted to the lance position (7.5-8.5m, which can be maintained) of the lance opening, and the oxygen purging furnace opening is opened.

3. And after the furnace mouth is completely blown (after the oxygen is closed for 4s, the oxygen pressure returns to zero), the lance is lifted, the slag scraper is closed when the oxygen lance is lifted to a waiting position (a waiting position signal lamp is on), the lance is stopped when the oxygen lance is lifted to an upper limit position, and the slag scraper is opened at the moment.

Fifthly, automatic component judgment:

and at the smelting end point of the converter, automatically judging whether steel can be tapped or not according to the molten steel temperature and the carbon content measured value of the TSC and the TSO and the molten steel components managed by the test according to tapping standards.

Inputting data: the measured values of the temperature and the carbon content of the molten steel of the TSC and the TSO, and the tested value of the carbon and phosphorus content of the molten steel.

Outputting data: and (5) whether tapping is allowed or not.

And (4) automatically judging that the steel is allowed to be tapped, and automatically starting tapping when the steel tapping conditions such as alloy preparation, ladle car in-position and the like are complete.

And when the steel cannot be tapped is automatically judged, or the measured data and the test data are not up after blowing is finished for 3 minutes, manually judging whether tapping is allowed or not.

The alloy is not prepared, or the steel is not allowed to be tapped after manual judgment, and the steel is tapped manually.

Sixthly, automatic tapping (including an automatic deoxidation alloying procedure): specifically, the method and system for controlling automatic tapping of the converter can be referred to the published patent CN 107099637A.

1. Automatically judging that tapping is allowed, automatically shaking the furnace, and starting a sliding plate hydraulic pump;

2. turning off the sliding plate when the furnace is shaken to-15 degrees;

3. shaking to a set tapping inclination angle, opening a sliding plate, and starting tapping;

4. slag discharging at the furnace mouth is early warned, the furnace shaking is stopped, steel is continuously tapped, and the furnace shaking is restarted when the early warning signal disappears;

5. discharging slag from the steel tapping hole, closing the sliding plate and lifting the furnace after steel tapping is finished;

6. lifting the furnace to-60 ℃, opening a sliding plate and discharging the residual steel;

7. lifting the furnace to-15 degrees, pausing for 5 seconds, and checking a steel tapping hole by field production personnel;

8. and lifting the furnace to the zero position, and automatically closing the slide plate hydraulic pump.

The system also comprises the following sub-control systems:

1. tracking, positioning and running the buggy ladle;

2. automatically blowing argon to the ladle;

3. tracking the slag condition of a furnace mouth;

4. the tapping hole is slagged down, tracked and monitored, and the slag is automatically blocked;

5. tap hole slide control

6. Automatically controlling the tilting of the converter;

7. and (5) monitoring the liquid level.

Automatic deoxidation alloying operation:

the automatic deoxidation alloying in the steel discharging process is realized by utilizing the converter encoder control and the alloy chute electric limiting technology. When steel is placed to 1/3 and the furnace rocking angle is 90-91 degrees, the alloy chute automatically swings and automatically adds alloy after being aligned with steel flow, the fan-shaped valve is automatically closed after alloy automatic vibration is carried out for 30 seconds when alloy is fed, deoxidation alloying is realized, alloy agglomeration caused by inaccurate steel flow of the chute during alloying due to human factors is avoided, certain influence on the next procedure is generated, production practice of the next procedure is greatly saved, and uniformity and stability of high water content are improved.

Seventhly, automatic deslagging:

and after tapping, lifting the furnace to a zero position and waiting for more than 4 seconds, and starting to execute a furnace shaking and slag pouring program.

1. And (3) stopping the furnace when the slag is poured to more than 100 degrees (the angle of the furnace stopping can be maintained at not less than 100 degrees), wherein the subsequent angle of the furnace shaking is 1 degree each time, the time interval of the furnace shaking is 3s each time, and the slag pouring degree number of the furnace shaking and the retention time of each degree are shown in table 1.

2. And lifting the furnace to the zero position after deslagging is finished (the deslagging angle is required to be larger than 105 degrees, the angle can be maintained, and the furnace stays for 5 s).

TABLE 1 slag pouring degree of furnace rocking and staying time table of each degree

Degree/degree of rocking furnace	100	101	102	103	104	105	106	107
									Residence time per s at each angle	5	4	3	3	2	2	2	4

Eighthly, automatic slag splashing:

the oxygen lance encoder is used for controlling the lance position as a main measure, an automatic slag splashing furnace protection model is developed, the using effect is good, the furnace body maintenance effect is improved for the unified slag splashing operation standard, and an important effect is played. For specific information, reference is made to the published patent CN105821175A, a method for controlling slag splashing protection of a converter type.

(1) After tapping of the converter is finished, shaking the converter to a zero position of a converter body, automatically opening a nitrogen cut-off valve through program control operation of an oxygen lance encoder when the lance position is lowered to a reference lance position 4-6 m away from the furnace bottom, starting to purge nitrogen splash slag, continuously lowering the lance position to 0.7-2.5 m away from the furnace bottom in the purging process, and taking an interval of 0.7-2.5 m as an end point solid lance position of slag splash protection; wherein, the accurate gun position in the slag splashing furnace protection process is controlled according to the thickness of the furnace bottom and the change condition of the furnace shape;

when the trunnion, the molten pool, the furnace bottom and the steel tapping hole in the furnace lining are corroded, high-low lance position slag splashing is adopted; or the thickness of the slag layer at each key part of the furnace lining is moderate (the thickness is measured by a thickness gauge to be 500-700 mm), and high-low alternative gun position slag splashing is adopted; or, the slag layer of each part of the furnace lining is too thick (the thickness measured by a thickness gauge is more than 700mm), and the slag splashing of the whole low gun position is adopted;

(2) judging the slag splashing effect according to the condition of flaky or granular slag flying out from the furnace mouth, controlling the slag splashing time well, and lifting a gun to pour the slag after slag splashing is finished; the slag splashing effect standard is judged as follows: when the diameter of slag sheets of slag flying out of a furnace mouth in the slag splashing process is more than or equal to 30mm and the slag sheets are obviously separated, the slag splashing effect is normal; the diameter of slag sheets of the slag flying out of the furnace mouth in the slag splashing process is less than 30mm, and even when no obvious slag sheets appear, the slag splashing effect is poor; and when the flying-out slag sheets gradually decrease after the stage of more than 30mm until the flying-out slag sheets do not fly out of the furnace mouth any more, slag splashing can be finished.

The slag splashing of the high-low gun position mode takes 500mm as a basic interval and takes 30-60 seconds as a basic time interval, the height of the gun position is sequentially reduced from the reference gun position to perform gun descending operation, and the total distance required to be reduced is 3 m. The total slag splashing time is set to be 4-5 minutes.

The slag splashing of the high-low alternate gun positions takes 1500-3000 mm as a basic interval and takes 15-30 seconds as a basic time interval, the height of the gun positions is sequentially reduced from the reference gun position for splashing, and the total distance required to be reduced is 3 m. The total slag splashing time is set to be 3-4 minutes.

The low lance position slag splashing refers to that the lance position of the oxygen lance is lowered to 0.7m away from the furnace bottom, nitrogen is blown and splashed until the gas stripping lance is closed, the lance position is unchanged in the process, and the total slag splashing time is set within 3 minutes.

In the process of furnace shutdown waiting and steel tapping, the erosion conditions of the trunnion, the molten pool, the furnace bottom and the steel outlet hole in the furnace lining are detected by an operator to determine a shadow area, and a laser thickness gauge is used for accurately measuring to obtain the actual furnace lining thickness. Calculating according to 8-10 t of the weight of slag generated by smelting molten steel in a 120t converter, calculating the addition amount of a thickening agent by 10-30% of the amount of the slag, and calculating according to the amount of the generated slag by using the same proportion when the tonnage of the converter is increased; when high-low alternate gun position slag splashing is adopted, a thickening agent is selectively added according to the slag thickening condition, and the judgment standard is as follows: when the total iron content of the slag test is more than 18%, the addition amount of the thickening agent is calculated according to 20-30% of the weight of the slag, when the total iron content of the slag test is between 14-18%, the thickening agent is added according to 10-20% of the weight of the slag, and when the total iron content of the slag test is less than or equal to 14%, the thickening agent is not added; when the whole course of low-position slag splashing is adopted, no thickening agent is added.

Ninthly, finishing the heat: when the oxygen lance is lifted to a waiting position, manually lighting a heat ending signal;

in the smelting method, each step needs to be processed by emergency manual treatment, and the subsequent process of the method is automatically and forcibly terminated.

The automatic alloy adding program flow in automatic calculation and alloy weighing is as follows:

first, adding alloy step node (taking 4# furnace as an example)

1. Automatic running selecting furnace base of alloy trolley

After the blowing is started (an automatic oxygen starting signal), the alloy trolley automatically runs to the furnace No. 4. And if the alloy trolley is arranged on other furnace bases, sequencing according to time nodes when oxygen blowing of each furnace base is started, and moving the alloy trolley to the next furnace base after the alloy of the furnace number which starts to be blown firstly is discharged (the characteristic is that the alloy belt stops rotating). And when the automatic oxygen starting signal is received, the alloy automatic calculation program starts to run, and the alloy automatic weighing program starts to run after the alloy trolley reaches the specified furnace seat.

2. Alloy automatic calculation program

Calculation of silicon and manganese components:

and after the alloy trolley moves to the No. 4 furnace (the No. 4 furnace alloy trolley stops sending signals), starting to execute an alloy automatic weighing program. According to different alloy types, an alloy calculation program is divided into a plurality of modes, and the automatic alloy calculation method of each mode is explained as follows:

mode A: medium manganese

1. Calculating the manganese in Z according to the manganese target value, and returning to weighing:

manganese in Z (Tmanganese-0.07) 100M molten steel 1000/H manganese Mn/W manganese Mn;

2. calculating the medium manganese carburization amount, returning the value to the alloy weighing primary control system, and automatically starting a weighing program by the alloy weighing primary control system:

the carburetion amount of medium manganese is Z medium manganese H medium manganese Mn medium manganese W medium manganese C/M molten steel/1000/100.

And (3) mode B: high manganese + ferrosilicon

1. Calculating the Z-Si iron according to the silicon target value, and returning to weighing:

calculating the Z ferrosilicon (T silicon) 100M molten steel (1000/H ferrosilicon Si/W ferrosilicon Si);

2. calculating the Z-high manganese according to the manganese target value, and returning to weighing:

z high manganese (TMn-0.07) 100M molten steel 1000/H high manganese Mn/W high manganese Mn;

3. calculating the high manganese carburetion amount, returning the value to the alloy weighing primary control system, and automatically starting a weighing program by the alloy weighing primary control system:

high manganese carburetion Z high manganese H high manganese Mn W high manganese C/M molten steel/1000/100.

And mode C: medium manganese and ferrosilicon

Si-Fe-Z-Si 100-M molten steel 1000/Si-Fe-Si/W-Si;

2. calculating the manganese in Z according to the manganese target value, and returning to weighing:

3. calculating the medium manganese carburization amount, returning the value to the alloy weighing primary control system, and automatically starting a weighing program by the alloy weighing primary control system:

Mode D: manganese metal and ferrosilicon

Si-Fe-Z-Si 100-M molten steel 1000/Si-Fe-Si/W-Si;

2. calculating the Z metal manganese according to the manganese target value, and returning to weighing:

(Tmn-0.07) 100M molten steel 1000/H metal manganese Mn/W metal manganese Mn;

3. calculating the carburization amount of the manganese metal, returning the value to the alloy weighing primary control system, and automatically starting a weighing program by the alloy weighing primary control system:

the carburetion amount of the manganese metal is Z manganese metal H manganese metal Mn metal W manganese metal C/M molten steel/1000/100.

Mode E: silicomanganese + hypermanganese

1. Calculating Z silicon manganese according to the target silicon component (calculating alloy according to silicon for short), and returning to weigh:

z silicomanganese (T silicomanganese) 100M molten steel 1000/H silicomanganese (Si)/W silicomanganese (Si);

2. calculating the Z-Si-Mn-increasing ratio:

silicomanganese plus manganese (Z silicomanganese H silicomanganese Mn W silicomanganese Mn/M molten steel/1000/100;

3. calculating the Z high manganese according to the target difference value of the silicomanganese manganese increasing and the T manganese, and returning to weigh:

z high manganese (Tmanganese target-0.07-silicomanganese adding manganese) 100M molten steel 1000/H high manganese Mn/W high manganese Mn;

4. calculating the silicon-manganese carburetion:

silicon-manganese carburetion amount Z silicon-manganese H silicon-manganese Mn W silicon-manganese C/M molten steel/1000/100;

5. according to the high manganese carburetion:

high manganese carburetion amount is Z high manganese H high manganese Mn high manganese W high manganese C/M molten steel/1000/100;

6. calculating the amount of carburization of the alloy, and returning the numerical values to the table:

the carbureting amount of the alloy is the carbureting amount of silicomanganese plus the carbureting amount of high manganese.

And F: silicomanganese + medium manganese

1. Calculating Z silicon manganese according to the components of the target silicon (calculating alloy according to silicon for short), and returning to weigh:

2. calculating the Z-Si-Mn-increasing ratio:

3. calculating the manganese in Z according to the target difference value of the manganese increase of silicon and manganese and the manganese increase of T, and returning to weigh:

manganese in Z (Tmanganese target-0.07-silicomanganese adding manganese) 100M molten steel 1000/H manganese Mn in Mn/W manganese Mn in Mn;

4. calculating the silicon-manganese carburetion:

5. calculating the medium manganese carburetion:

medium manganese carburetion amount is Z medium manganese H medium manganese Mn medium manganese W medium manganese C/M molten steel/1000/100;

the carbureting amount of the alloy is the carbureting amount of silicomanganese plus the carbureting amount of medium manganese.

Mode G: silicomanganese + ferrosilicon

1. Calculating Z silicon manganese according to the components of the target manganese (alloy is calculated according to manganese for short), and returning to weighing:

z silicomanganese (TMn) 100M molten steel (1000/H silicomanganese Mn/W silicomanganese Mn);

2. calculating the silicon increase of Z silicon manganese:

silicomanganese plus silicon (Z silicomanganese H silicomanganese Si W silicomanganese Si/M molten steel/1000/100;

3. and (3) comparing the silicon-manganese silicon-increasing target with the T silicon target, calculating Z silicon iron, and returning to weigh:

Z-Si-Fe (T-Si target-Si-Mn-Si) 100M molten steel 1000/H-Si-Fe Si/W-Si-Fe-Si;

4. calculating the silicon-manganese carburetion:

5. calculating the alloy carburetion:

the carbureting amount of the alloy is the carbureting amount of silicomanganese.

Mode H: low phosphorus low carbon silicomanganese + high manganese

1. Calculating Z low-phosphorus low-carbon silicomanganese according to target silicon components (alloy is calculated according to silicon for short), and returning to weigh:

z low-phosphorus low-carbon silicomanganese (TSix100 Mmolten steel) 1000/H low-phosphorus low-carbon silicomanganese (Si)/W low-phosphorus low-carbon silicomanganese (Si);

2. calculating the Z low-phosphorus low-carbon silicomanganese manganese increasing:

low-phosphorus low-carbon silicomanganese manganese adding ═ Z low-phosphorus low-carbon silicomanganese ═ H low-phosphorus low-carbon silicomanganese Mn × (W) low-phosphorus low-carbon silicomanganese Mn/M molten steel/1000/100;

3. calculating the Z high manganese according to the target difference value of the low-phosphorus low-carbon silicomanganese manganese adding and the T manganese, and returning to weigh:

z high manganese (Tmanganese target-0.07-low phosphorus low carbon silicomanganese plus manganese) 100M molten steel 1000/H high manganese Mn/W high manganese Mn;

4. calculating the medium manganese carburetion:

5. calculating the amount of carburization of the alloy, and returning the numerical values to the table:

the carbureting amount of the alloy is the carbureting amount of medium manganese.

Mode I: low-phosphorus low-carbon silicomanganese + medium manganese

1. Calculating Z low-phosphorus low-carbon silicon-manganese according to the components of the target silicon (calculating alloy according to silicon for short), and returning to weigh:

manganese in Z (Tmanganese target-0.07-low-phosphorus low-carbon silicomanganese increasing manganese) 100M molten steel 1000/H manganese Mn in Mn/W manganese Mn in W;

4. calculating the medium manganese carburetion:

5. calculating the alloy carburetion amount, returning the value to the alloy weighing primary control system, and automatically starting a weighing program by the alloy weighing primary control system:

Mode J: low-phosphorus low-carbon silicomanganese + ferrosilicon

1. Calculating Z low-phosphorus low-carbon silicomanganese according to the components of the target manganese (alloy is calculated according to manganese for short), and returning to weigh:

2. calculating the silicon increase of Z low-phosphorus low-carbon silicomanganese:

low-phosphorus low-carbon silicomanganese silicon addition, (Z) low-phosphorus low-carbon silicomanganese (H), low-phosphorus low-carbon silicomanganese (Si), (W), low-phosphorus low-carbon silicomanganese (Si)/M molten steel (1000/100);

3. and (3) comparing the low-phosphorus low-carbon silicomanganese silicon-increasing target with the T silicon target, calculating Z silicon iron, and returning to weigh:

z ferrosilicon (T silicon target-low phosphorus low carbon silicomanganese silicon) 100M molten steel 1000/H ferrosilicon Si/W ferrosilicon Si; mode K: silicon manganese

2. calculating the amount of carburization of Si and Mn

3. calculating the amount of carburization of the alloy, and returning the numerical values to the table:

Calculation of ferrochrome

If the target steel grade contains Cr, calculating according to the requirement of the target steel grade T chromium target, wherein the calculation program uses different alloys according to the requirement, and the calculation method comprises the following steps:

mode L: low-carbon ferrochrome

1. And (3) calculating the Z low chromium when low-carbon ferrochrome is required to be used for chromium preparation, and returning to weighing:

z low chromium (T chromium) 100M molten steel (1000/H low chromium Cr/W low chromium Cr);

2. calculating Z low chromium recarburization:

low chromium carburetion amount Z low chromium H chromium C W low chromium C/M molten steel/1000/100;

and a mode M: medium carbon ferrochromium

1. And (3) calculating the chromium in Z and returning to weighing:

cr in Z is T Cr 100M molten steel is 1000/H Cr in Cr/W Cr in Cr;

2. calculating chromium recarburization in Z:

medium chromium carburetion amount Z medium chromium H chromium C medium chromium W medium chromium C/M molten steel/1000/100;

and a mode N: high carbon ferrochrome

1. And (3) requiring the high-carbon ferrochrome to be matched with chromium, calculating the Z high chromium, and returning to weighing:

z high chromium (T chromium) 100M molten steel (1000/H high chromium (Cr)/W high chromium (Cr);

2. calculating Z high chromium recarburization:

high chromium carburetion amount Z high chromium H chromium C W high chromium C/M molten steel/1000/100;

calculation of noble alloys

According to the requirement of the precious alloy components in the target steel grade, the precious alloy is calculated, and the calculation method comprises the following steps:

mode O: ferrocolumbium

Z ferrocolumbium (Tnbb) 100M molten steel (1000/H ferrocolumbium Nb/W ferrocolumbium Nb);

and (3) mode P: vanadium iron

Z ferrovanadium 100M molten steel 1000/H ferrovanadium V/W ferrovanadium V;

mode Q: vanadium nitrogen

Z vanadium nitrogen (Tvanadium) 100 (M) molten steel 1000/H ferrovanadium V/W ferrovanadium V;

and a mode R: ferromolybdenum

Z ferromolybdenum-100 Mo molten steel 1000/H ferromolybdenum-Mo/W ferromolybdenum-Mo;

and (2) mode S: copper particles

Z Cu Fe 100M molten steel 1000/H Cu grain Cu/W Cu grain Cu;

and a mode T: nickel plate

Z nickel plate 100M molten steel 1000/H nickel plate Ni/W nickel plate Ni.

The above calculation formula is described with respect to the symbol mark:

1. h + alloy name + elemental symbol: represents the recovery rate,%, of the element in the alloy;

example (c): h high manganese Mn is 90 percent, which represents that the recovery rate of Mn element in high manganese is 90 percent

2. W + alloy name + element symbol: represents the mass percent of the element contained in the alloy,%;

example (c): w silicomanganese Mn — 65.85, representing a mass content of Mn in silicomanganese of 65.85%.

W silicomanganese C1.61, representing a 1.61 mass% C content in silicomanganese.

3. M, molten steel: representing the steel tapping amount, and the calculation formula is as follows:

m molten steel (weight of collected molten iron + weight of collected scrap) is 90 percent, t;

the weight of molten iron and scrap steel is acquired in the secondary level of the sublance and is directly called.

4. T + element name + min: represents the lower limit of judgment required by the element in the target steel grade, and the mass percent;

example (c): t Mn min ═ 1.20, and indicates that the lower limit of Mn determination required in the target steel grade is 1.20%, and the value is called from the steel grade maintenance program.

5. T + element name + target: represents the target value of the element requirement in the target steel grade, and the mass percent;

example (c): the T manganese target is 1.30, indicating that the target for Mn in the target steel grade is 1.30%, the value recalled from the steel grade maintenance program.

6. Name of Z + alloy: the calculated addition of the alloy, kg, is shown.

Example (c): and when Z silicon manganese is 2000, the silicon manganese addition represents 2000kg for the heat calculation.

Compared with the related technology, the unmanned intelligent automatic steel-making method provided by the invention has the following beneficial effects:

the invention can realize the unmanned steelmaking, reduce the personnel allocation in the steelmaking workshop, standardize the steelmaking operation, reduce the influence of the manual misoperation on the steelmaking process, further improve the working environment of steelmaking operators and reduce the labor intensity of workers.

The invention carries out system analysis on each unit of the converter, establishes an intelligent steel-making system with no humanization in field operation according to a main line of a one-key process smelting-intelligent terminal point judgment-intelligent steel tapping-intelligent slag dumping-intelligent slag splashing flow of the converter, and realizes the unmanned operation of the whole flow of the converter by operating the operation of each step only at a user terminal (such as a computer).

The method can be realized by upper and lower limit values and interval values of intervals of process parameters (such as temperature, time and the like), and embodiments are not listed.

Conventional technical knowledge in the art can be used for the details which are not described in the present invention.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An unmanned intelligent steelmaking system is characterized in that the steelmaking system comprises a steelmaking process control subsystem, a converter smelting execution subsystem, a tapping subsystem, a slag pouring subsystem, a slag splashing subsystem, an alloy metering subsystem, an alloy weighing primary control system and an infrared slag discharging detection system;

2. An unmanned intelligent steelmaking method based on the unmanned intelligent steelmaking system of claim 1, the method comprising the steps of:

s1: starting the heat;

s10: and finishing the heat.

3. The unmanned intelligent steelmaking method of claim 2, wherein the alloy addition levels in the alloy metering subsystem are calculated using the following alloy addition modes:

mode A: medium manganese:

1) calculating the manganese in Z according to the manganese target value:

2) calculating the medium manganese carburetion:

and (3) mode B: high manganese + ferrosilicon:

1) calculating the Z-Si iron according to the silicon target value:

2) calculating the Z-high manganese according to the manganese target value:

3) calculating the high manganese carburetion amount, returning the value to the alloy weighing primary control system, and automatically starting a weighing program by the alloy weighing primary control system:

and mode C: medium manganese + ferrosilicon:

1) calculating the Z-Si iron according to the silicon target value:

Si-Fe-Z-Si 100-M molten steel 1000/Si-Fe-Si/W-Si;

2) calculating the manganese in Z according to the manganese target value:

3) calculating the medium manganese carburetion:

mode D: manganese metal + ferrosilicon:

1) calculating the Z-Si iron according to the silicon target value:

Si-Fe-Z-Si 100-M molten steel 1000/Si-Fe-Si/W-Si;

2) calculating the Z metal manganese according to the manganese target value:

(Tmn-0.07) 100M molten steel 1000/H metal manganese Mn/W metal manganese Mn;

3) calculating the carburization amount of the manganese metal:

the carburetion amount of the manganese metal is Z manganese metal H manganese metal Mn metal W manganese metal C/M molten steel/1000/100;

mode E: silicomanganese + high manganese:

1) calculating Z silicon manganese according to the target silicon composition:

2) calculating the Z-Si-Mn-increasing ratio:

3) calculating the Z high manganese according to the target difference value of the silicon-manganese increasing and the T manganese:

4) calculating the silicon-manganese carburetion:

5) according to the high manganese carburetion:

6) calculating the alloy carburetion:

the alloy carbureting amount is silicon-manganese carbureting amount plus high-manganese carbureting amount;

and F: silicomanganese + medium manganese:

1) calculating the ratio of Z silicon manganese according to the composition of target silicon:

2) calculating the Z-Si-Mn-increasing ratio:

3) and calculating the manganese in Z according to the target difference between the silicon-manganese increasing and the T manganese:

4) calculating the silicon-manganese carburetion:

5) calculating the medium manganese carburetion:

6) calculating the alloy carburetion:

the recarburization amount of the alloy is silicon-manganese recarburization amount plus medium manganese recarburization amount;

mode G: silicomanganese + ferrosilicon:

1) calculating the Z silicon manganese according to the target manganese composition:

2) calculating the silicon increase of Z silicon manganese:

3) comparing the silicon-manganese silicon increasing target with the T silicon target, calculating the Z silicon iron:

Z-Si-Fe (T-Si target-Si-Mn-Si) 100M molten steel 1000/H-Si-Fe Si/W-Si-Fe-Si;

4) calculating the silicon-manganese carburetion:

5) calculating the alloy carburetion:

the recarburization amount of the alloy is the recarburization amount of silicomanganese;

mode H: low-phosphorus low-carbon silicomanganese + high manganese:

1) calculating the Z low-phosphorus low-carbon silicomanganese according to the target silicon component:

2) calculating the Z low-phosphorus low-carbon silicomanganese manganese increasing:

3) calculating the Z high manganese according to the target difference value of low-phosphorus low-carbon silicomanganese manganese increasing and T manganese:

4) calculating the medium manganese carburetion:

5) calculating the alloy carburetion:

the recarburization amount of the alloy is equal to the recarburization amount of medium manganese;

mode I: low-phosphorus low-carbon silicomanganese + medium manganese:

1) calculating the Z low-phosphorus low-carbon silicomanganese according to the components of the target silicon:

4) calculating the medium manganese carburetion:

5) calculating the alloy carburetion:

mode J: low-phosphorus low-carbon silicomanganese + ferrosilicon:

1) calculating the Z low-phosphorus low-carbon silicomanganese according to the components of the target manganese:

2) calculating the silicon increase of Z low-phosphorus low-carbon silicomanganese:

3) comparing the low-phosphorus low-carbon silicomanganese silicon-increasing target with the T silicon target, calculating the Z silicon iron:

z ferrosilicon (T silicon target-low phosphorus low carbon silicomanganese silicon) 100M molten steel 1000/H ferrosilicon Si/W ferrosilicon Si;

mode K: silicon and manganese:

2) calculating the silicon-manganese carburetion:

3) calculating the alloy carburetion:

mode L: low-carbon ferrochrome:

1) and (3) calculating the Z low chromium content by using low-carbon ferrochrome for chromium matching:

2) calculating Z low chromium recarburization:

and a mode M: medium carbon ferrochrome:

1) and (3) calculating the chromium content in Z according to the requirement of matching the medium carbon chromium iron with the chromium:

cr in Z is T Cr 100M molten steel is 1000/H Cr in Cr/W Cr in Cr;

2) calculating chromium recarburization in Z:

and a mode N: high-carbon ferrochrome:

1) and if high-carbon ferrochrome is required to be matched with chromium, calculating the Z high-chromium:

2) calculating Z high chromium recarburization:

mode O: ferrocolumbium:

and (3) mode P: vanadium iron:

z ferrovanadium 100M molten steel 1000/H ferrovanadium V/W ferrovanadium V;

mode Q: vanadium nitrogen:

and a mode R: ferromolybdenum:

and (2) mode S: copper particles:

z Cu Fe 100M molten steel 1000/H Cu grain Cu/W Cu grain Cu;

and a mode T: nickel plate:

z nickel plate T nickel 100M molten steel 1000/H nickel plate Ni/W nickel plate Ni;

wherein,

1) h + alloy name + elemental symbol: represents the recovery rate,%, of the element in the alloy;

2) w + alloy name + element symbol: represents the mass percent of the element contained in the alloy,%;

3) m, molten steel: representing the steel tapping amount, and the calculation formula is as follows:

4) t + element name + min: represents the lower limit of judgment required by the element in the target steel grade, and the mass percent;

5) t + element name + target: represents the target value of the element requirement in the target steel grade, and the mass percent;

6) name of Z + alloy: the calculated addition of the alloy, kg, is shown.