KR100381507B1 - Blast furnace bucket material real time batch call automatic control apparatus - Google Patents

Abstract

The present invention is a charging level measuring unit for measuring the level of the charge in the blast furnace to supply to the central control unit, and importing the raw material from the raw material discharged from the intermediate tank to the hopper, charging time for measuring the equalization, charging, back pressure time for each hopper The measurement unit, the raw material position detection unit that generates the discharge signal when the raw material is discharged from the relay tank and identifies and informs the location where the raw material is loaded at the charging cost, and the total process until the raw material is discharged from the intermediate tank and charged into the blast furnace. It provides a blast furnace charge real-time batch call automatic control device including a central control unit that performs the optimal real-time batch call time by calculating the data supplied from each relevant unit to perform the most optimal charging batch call monitoring.

Description

Blast furnace bucket material real time batch call automatic control apparatus

In the bell-less blast furnace, the raw material discharged from the relay tank to charge the blast furnace to calculate the charging time for each process until the charge in the blast furnace to calculate the total charging time and then to the relay tank It relates to a charge batch call for batching raw materials in real time, in particular, when one of the two top charging devices fails and only one hopper is charged. The present invention relates to an automatic blast furnace loading real-time batch call automatic control device that solves a problem of drastically reducing the charging speed and responds quickly when a fast charging is required due to the operation of a high payout ratio, a change in the charging method, or a decrease in the charging level.

The conventional charging device has two problems as follows.

First, when one of the top hoppers is used due to the failure of the top charging device or the repair work during operation. At this time, the one-sided operation using only one of the two hoppers will be carried out, but the charge-loading batch call system will make a batch call after the start of charging in the same way as the normal batch call system using two hoppers, and thus the charging capacity will be reduced by half. Productivity was reduced by drastically reducing the wind pressure (6000 → 4000 ~ 4500Nm ³ / min).

Second, blast furnace operations often change depending on the conditions of operation. Ore and coke ratios change from time to time, and the charging method is also composed of coke → alternative ore → small ore charges. However, the existing batch call system is programmed with sufficient stability against time based on the basic charging method. Therefore, there is a problem that can not match the charging ability for various charging methods.

That is, the existing charge batch call system is applied to the one-side charging operation in the same manner as when two charge hoppers are normally used, so that the top hopper makes a batch call and starts to call raw materials. Therefore, after the raw material is charged to the blast furnace, the raw material discharged to the middle of the blast furnace is waiting for the import of the raw material for about 424 seconds per charge, so that the raw material is not charged quickly and the amount of charging time is consumed. In the charging system, the average charging time of the blast furnace is delayed a lot, and the delay of the overall blast furnace work occurs.

Accordingly, the present invention is to solve the problem that the charging level is lowered due to the one-sided operation or the change of the charging method over the top of the top charging device, the batch call system of the existing blast furnace charging device to start the charging of the top charging hopper (mcg open) Real-time batch call system to batch call the next species at the point of time. Raw materials are loaded in the blast furnace and charged into the blast furnace in the shortest time, so that they can cope with various charging methods without blasting. The purpose is to provide a control device.

The blast furnace charge real-time batch call automatic control device according to the present invention for achieving the above object is a charge level measuring unit for measuring the level of charge in the blast furnace to supply to the central control unit, and from the raw material discharged from the relay tank to the hopper A feed time measuring unit that imports raw materials, measures the equalization, charging and back pressure times by hopper, and generates a discharge signal when discharging the raw materials in the transit tank, and locates and informs the location where the raw materials are loaded at the loading cost. The central part that performs the optimal real-time batch call time by calculating the data supplied from each part to monitor the total process until the raw material is discharged from the relay tank and charged to the blast furnace to perform the most optimal charge batch call. Characterized in that it comprises a control unit.

The present invention calculates the time from the top of the blast furnace to the top of the blast furnace and the time imported from the top of the blast furnace to the top hopper, and the time from the top of the hopper to the pressure equalization, the time from the completion of the hopper equalization to charging, the total charged in the blast furnace By calculating the time for each type of batch call, solved the problem of waiting for a long time after the batch call while the raw material is charged before.

1 is a high-precision charging of the bell-less blast furnace for analysis of the present invention.

Figure 2 is a schematic diagram showing the top charging hopper and the auxiliary device.

Figure 3 is a block diagram of a charge real-time batch call automatic control device of the present invention.

Figure 4 is a flow chart of the operation of the automatic charging device real-time batch call of the present invention.

<Description of the symbols for the main parts of the drawings>

10. Bel-Less Blast Furnace 10-1. Wind mouth

10-2. Flap chute 10-3. Head chute

11,11 '. Charging hopper

11-1, 11-2. Hopper seal valve

12-1, 12-2. Lead and material flow control valve

13-1, 13-2. Hopper lower seal valve

14-1, 14-2. Primary equalizing valve

14-3, 14-4. Secondary equalizing valve

14-5, 14-6. Relief valve

14-7, 14-8. Dust dump valve

14-9. Gas recovery valve

15. Rotation chute

16. Charging belt conveyor

16-a. Head pulley 16-b. Tail pulley

16-1. Coke Charge 16-2. Allele charge

16-3. Small particle primary charge 16-4. Central Coke Charge

17. Coke Storage Tanks (8) 17-1. Coke particle size screen

17-2. Coke Transfer Belt Conveyor

17-3. Min Coke Transfer Belt Conveyor

17-4, 17-5. Coke weighing hopper

18. Sintering machine 18-1. Sintered Ore Feeder

20. Allelic light manufacturing machine (8 pieces) 20-1. 8 raw material storage tanks

20-2. Allele particle size sorter 20-3. A feedstock feeder

20-4. Ore large hopper

20-6. Allele Transport Belt Conveyor

20-7, 20-8, 20-9. Small particle conveying conveyor belt

30-3, 30-4. Ore large surge hopper

32. Exit gate 35. Small size ore reservoir (2)

36. Particle particle size sorter (screen) 37. Particle particle conveying conveyor belt

38. Spectroscopic Belt Conveyor 38-1. Spectroscopy reservoir

39. ore small weighing hopper

40. Charging level measuring unit 40-1. Charge level tracking device

50. Electric signal control line 51. Automatic hopper selector

60. Raw material position detection unit

60-1. Belt Conveyor on Charge Detector (1)

60-2. Belt Conveyor on Charge Detector (2)

61. Charging speed counter 70. Charging time measuring unit

70-1. Charging time measuring device 70-2. Equalization time measuring device

70-3. Charging time measuring device 70-4. Back pressure time measuring device

70-5. Charge time setting and setting device for each type

80. Programmable logic controller (PLC)

80-1. Trip charge matrix 80-2. Dump level comparator

80-3. Charging time calculating device 80-4. Charge gap control device

90. Raw Material PLC

90-1. First coke emission signal simulator

90-2. 2nd coke emission signal simulator

90-3. 1st opposed light emission signal simulator

90-4. 2nd opposed light emission signal simulator

90-5. Small particle emission signal simulator

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a high-precision charging of the bell-less blast furnace for the analysis of the present invention, Figure 2 is a schematic diagram showing the top-loading hopper and the auxiliary device, Figure 3 is a block diagram of an automatic loading arrangement control device of the present invention 4 is an operation flowchart of an automatic charge batch call control device according to the present invention.

First, the charging accuracy of the bell-less blast furnace for the analysis of the present invention of Figure 1, the schematic diagram showing the top-loading hopper and the auxiliary device of Figure 2, reference numeral 10 is a bell-less blast furnace, 10-1 is a tuyere, 10 -2 represents a transfer chute, 10-3 represents a head chute, 11 and 11 'represents a topless loading hopper, and 11-1 and 11-2 represent a hopper upper seal valve. In addition, 12-1 and 12-2 are lead, raw material loading control valves, 13-1 and 13-2 are hopper lower seal valves 14-1 and 14-2 are primary pressure reducing valves 14-3 and 14-4 are 2 Represent each of the differential pressure valves. In addition, 14-5 and 14-6 are back pressure valves 14-7 and 14-8 are dust injection valves 14-9 are gas recovery valves 15 are charging turning chutes, 16 are charging belt conveyors, and 16-a are head pulleys 16- b is the tail pulley 16-1 is the coke primary 16-2 is the primary light primary, 16-3 is the small primary light 16-4 is the primary coke primary. In addition, 17 is a coke storage tank (8), 17-1 is a coke particle size sorter, 17-2 is a coke conveying belt conveyor, 17-3 is a coke conveying belt conveyor, 17-4, 17-5 is a coke webbing hopper. Indicates. 18 is a sintering machine 18-1, a sintered ore supply machine, 20 is an allelic light manufacturing machine (8 pieces), 20-1. Substock Storage Tanks (8), 20-2. Allele particle size sorter, 20-3 represents a feedstock feeder, 20-4 represents an allele weighing hopper, 20-6 represents an allele transport belt conveyor, 20-7, 20-8, 20-9 represents a small particle transport conveyor belt . In addition, 30-3 and 30-4 are all-optical surge hoppers, 32 are discharge gates, 35 are small particle storage tanks, 36 are small particle size sorters, 37 are small particle transfer conveyor belts, and 38 are spectroscopic belt conveyors. , 38-1 is a spectral reservoir, and 39 is a small particle weighing hopper, respectively. 40-1 indicates a charge level tracking device.

3 is a configuration diagram of an automatic charging device for batch real-time batch call of the present invention, wherein the charging level measuring unit 40 is an apparatus 40-1 for measuring the charge level in the blast furnace, and is at the same level as the blast furnace gearbox. It is installed in the blast furnace, which is composed of a motor, a reducer, and a drum, and a steel wire is wound inside the drum. The blast furnace load measurement is always tracked except when the charge is loaded into the blast furnace, and the blast furnace charge level is measured and the measured value is supplied to the central controller 80 through the electric signal control line 50. The charging time measuring unit 70 is configured as follows.

First, the raw material discharged from the relay tank from the raw material import time measuring device (70-1) is loaded at the charging time, and the time of the import hopper full base at the loading load detector 1 (60-1) is set. The average time out of the three charges for each kind is supplied to the central control unit (80).

Second, as the equalization time measuring device (70-2), the raw material is imported to the hopper, and then the first and second equalizing valves 14-1 and 2 are opened to open the blast furnace pressure in the hopper. The time until the equalization completion time becomes the same, and the time obtained by averaging three charges for each kind is supplied to the central controller 80.

Thirdly, as a charging time measuring device (70-3), a device for measuring the time from completion of equalization pressure to completion of charging by type of sound, and the sounding measurement (40-2) is performed at the hopper position in the state where the pressure equalization is completed. On the other hand, the top charging device is operated so that the gear box 15-1 is lowered to the designated latch, the hopper lower seal valve 13-1, 2 is opened, and then the message 12-1, 2 is opened. ) Is opened by the specified angle and the raw material is charged into the furnace. When charging is completed and the chute 15 reaches the waiting position (parking), the average value of the three charges is calculated for each species and the central control unit 80 is supplied.

Fourth, as the back pressure time measuring device 70-4, all the valves of the charging device are closed after the raw material in the hopper is charged to the blast furnace, and the back pressure starts and the time until the hopper is ready to import the raw material. When the secondary pressure equalizing valve (14-3, 4), which is the device, and the back pressure valve (14-5, 6) are opened, and the pressure in the hopper reaches atmospheric pressure, the upper seal valve (11-1, 2) opens and the switching chute (10-2) refers to the time until the completion of the movement to the hopper, which is not related to the type of light, and calculates the average value of the three times the back pressure time of the whole process is supplied to the central control unit (80).

Fifthly, as a device for setting and adjusting the charging time according to the light type 70-5, the device can be arbitrarily set or decremented by the total charging time in each of the above four processes, that is, from the import of raw materials to the hopper back pressure. It is supplied to the central control unit 80 as a device that adjusts temporarily or at all times in consideration of the deviation or safety for each process that may occur during the operation process. In other words, the central control unit 80 comes from the total charging time plus all the light type time measured by the raw material import time measuring device, the equalization time measuring device, the charging time measuring device, the back pressure time measuring device and the light loading time deceleration setting device for each light type. The final loading time is determined by calculating the value.

The raw material position detection unit 60 has an encoder in the charging belt conveyor tail pulley 16-b and counts the number of revolutions of the pulley to generate a pulse signal to generate a distance at which the visi is moved. Generates. In addition, there is a gate signal generator for generating a signal that opens and closes the gates of the gate portions 90-1 to 5 of each of the five hoppers of the relay tone, and when the gate is opened, the discharge start signal is given and the gate closes to give the discharge completion signal. And load cell (load cell) to detect the weight on the lower part of the belt to check whether the top hopper was a condition for importing the raw material when the raw material reaches the point of charging head head (350m from the tail pulley at the charging time) The charge loading detector 2 (60-2) consisting of the following is installed, and when the raw material discharged from the relay tank is transferred from the tailing point to the M point at the charging part at the bottom of the belt to find the end of the raw material by weight, In order to detect the weight, a load loading detector 1 (60-1) composed of a load cell is installed.

The central control unit 80 includes a charging hopper selecting device 51 for checking the hopper use state, a dump level comparator 80-2 for enabling charging, and a charging time calculating device for calculating data from the charging time measuring unit. (80-3), a charge interval control device (80-4) for adjusting the interval between batch calls by outputting data from the raw material position detection device and a charge matrix setting device for setting the charging method of the basic blast furnace charge (80- It consists of 1).

First, the charging hopper selection device 51 is a device that checks whether there are two hoppers currently available among two open charging hoppers and uses one as a reference for the batch call. The dump level comparator 80-2 is a device that receives charging level measurement data raised from the charging level measuring unit 40, compares the dump level with the current charging level, and starts charging when the charging dump level is reached.

Then, the charging time calculating device 80-3 calculates the respective data raised from the charging time measuring unit 70. Raw material import time, equalization time, charging time, back pressure time are added to each coke, allele or small ore, and then the time set in the loading time deceleration setting device for each type is added or subtracted. After that, the final charging time for each type is calculated from the calculated time. This is calculated separately for each hopper and each species.

The charge gap control device 80-4 receives the raw material position and the discharge state from the raw material position detection unit 60 in the charge non-view 16 and maintains the gap between the charges for the minimum time required to receive the charges between the hoppers. Check if the loading hopper has reached the conditions for importing the raw materials, and if the loading conditions are not reached, set Vichy (16). It is a device that counts the time passed through 60-1) and starts a time count for the next batch call.

Therefore, the central control unit 80 receives all the data from the above device and finally controls to make a batch call.

Hereinafter, the operation and effect of the present invention (Fig. 3) will be described with reference to Fig. 4.

When the charging level drops during operation, the central control unit checks whether the current top hopper can use both or only one through the charging hopper selection device 51.

When the charging level measuring unit 40 measures the charging level and sends it to the central control unit, the central control unit compares the current charging level with the dump level and gives a charging instruction to the corresponding hopper when the charging level reaches the dump level. If the hopper is ready for charging, the order to start charging is immediately issued. If the hopper is not ready, check whether the batch call is out of the hopper. So if the batch call went out before then, the raw material is ready for import, and if the batch call does not go out, it is ready to make a batch call. The central control unit confirms which kind of light is the next batch call by the trip charge matrix 80-1. After that, the raw material import time, equalization time, charging time, back pressure time of the corresponding hopper for each coke, alleles and small ores is added, and then the time set in the charge type deceleration setting device 70-5 for each type is added or subtracted. The final charge time is then calculated by subtracting the time it takes for each mineral to reach charge loader 1 (60-1).

Then, the charge gap control device of the central control unit receives the relay tone gate signal transmitters 90-1 to 5 to determine whether the raw material is being discharged at the time of charging emergency 16 at the raw material position detection unit (80-4). If the raw material is in the charging cost, identify where it is located. The charging matrix 80-1 reads out whether the raw material discharged from the intermediate tank is two batch raw materials (coke, allel ore) or one batch raw material (small ore). Thereafter, if the batch material is one batch material, the time when the end of the batch material has passed the charge loader 1 (60-1), and if the batch material is batch 2, the end point of the batch terminal has passed the raw material loader 1 (60-1) Receives. Therefore, when the raw material passing time from the raw material position detection unit and the ore passing through the charge loader 1 are found in which hopper of the top and what kind of light has passed, the top loading matrix is read and the final time calculated by the charging time calculator Based on the time when the end of the charge of the previous batch has passed through the load loader 1 (60-1), the batch is given a batch call command to the raw material PLS 90 with an interval time.

As described above, according to the present invention, when one of the two top charging devices is broken and the charging is performed with only one hopper, the charging speed is significantly lower than that of the blast furnace loading chart. In order to solve the problem, it is possible to respond quickly to the need for fast charging due to the operation of the high cost, changing the charging method, lowering the charging level, etc., and thus, there is an excellent effect of coping with various charging methods without sensation.

The present invention described above can be variously substituted, modified and changed within the scope without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains and the accompanying drawings. It is not limited to.

Claims (4)

A charge level measuring unit for measuring the level of the charge in the blast furnace and supplying it to the central control unit; A charging time measuring unit for importing raw materials from the raw material discharged from the relay tank to the hopper and measuring the equalization, charging and backing time for each hopper; A raw material position detection unit for generating a discharge signal when discharging the raw material in the relay tank and identifying and informing the position at which the raw material is loaded at the charging ratio; The central control unit that performs the optimal real-time batch call time by calculating the data supplied from each unit to monitor the total process until the raw material is discharged from the relay tank and charged to the blast furnace to perform the most optimal charging batch call. Blast furnace charge real-time batch call automatic control device, characterized in that configured to include. The method of claim 1, The charging time measuring unit measures the raw material import time for supplying the central control unit with the time taken from the loading tank at the charging cost and averaging the time from the loading point of the loading hopper to the completion of the tripper hopper from the two points of each kind to the central control unit. Device, Equal pressure supplying the central controller to average time of three charges for each type of time from the time when the raw material is imported to the hopper and the first equalization valve and the second equalization valve are opened to make the pressure in the hopper equal to the blast furnace pressure. Time measuring device, A charging time measuring device for measuring the time from completion of the equalization to the completion of charging, After the raw material in the hopper is charged to the blast furnace, all the valves of the charging device are closed and back pressure starts. It means the time until the hopper completes the import of raw materials. Back pressure time measuring device supplied to the control unit, The blast furnace charges real-time batch call, characterized in that it comprises a charge and load setting device according to the type of light that can be arbitrarily set or decremented by the driver in the total charging time from the four processes, the raw material import to the hopper back pressure Automatic control device. The method of claim 1, The central control unit and a charging hopper selection device for checking the hopper use state, A dump level comparator that allows charging; A charging time calculating device for calculating data from a charging time measuring unit; Charge gap control device for adjusting the interval between batch calls through the data from the raw material position detection device, A blast furnace charge real-time batch call automatic control device comprising a charge matrix setting device for setting the charging method of the basic blast furnace charge. The method of claim 3, wherein The charging time calculating device calculates the raw material import time, equalization time, charging time, back pressure time by adding the respective time for each coke, allele or small ore, and then adding and subtracting the time set in the loading time for each type. Automatic calculation of the blast furnace chargeable batch call, characterized by calculating the final charging time for each type by subtracting the time it takes for each type to reach the load loader 1, but separately for each hopper and each type. Device.