KR910006546Y1 - Control system for charging material to the blast furnace - Google Patents

Abstract

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Description

Raw material loading control system in blast furnace

Figure 1 is a schematic diagram of the blast furnace raw material charging apparatus applied to the present invention.

2 is a block diagram of the present invention control system.

3 is a block diagram of a conventional control system.

* Explanation of symbols for main parts of the drawings

2, 8, 17: classification screen 24: sounding

25: chute 26: lower seal valve

27: flow control gate 31: upper seal valve

51: data entry and display 52: processor computer

53: Data transfer and graphic controller 55, 74: I / O module

90, 120: program logic search unit 110: memory unit

100, 130: blast furnace control unit 140: non-particle size charging control unit

The present invention relates to a blast furnace raw material charging control system, and in particular, it is easy to handle the excess small sintered ore generated in the sintered ore classification screen when the particle size is charged, and the screen screen separately when the mutual change between the particle size input and non-particle size charging system. It relates to a reactor charging control system in a blast furnace that does not require replacement work.

In general, there are two methods for charging sintered ore into the blast furnace, there are charging methods by particle size and charging method by specific particle size.

The non-particle size charging method can be easily understood from the particle size charging method which will be described below.

As shown in Fig. 1, the charging method by particle size is divided into coke coke and coke coke by the classification screen (2) by coke stored in a plurality of cokes bin (1). The belt conveyors 3 and 4 are stored in the Goke coke weighing tank 5 and the bun coke storage tank 6.

On the other hand, the sintered ore stored in the sintered ore 7 is divided into allied sintered and small sintered ores by the classification screen 8, and the allied ore is passed through the allied sintered ore metering tank 9, and then, by the belt conveyor 10, the sintered ore is It is stored in the relay tank 11, the small sintered ore is sequentially stored in the small sintered ore bin 16 through the belt conveyor (12, 13, 14, 15).

In this case, since the classification screen 8 is arranged for each of the 13mm trees, the particle size of the sintered ore stored in the allied sintered ore intermediate beam 11 is 13 mm or more and the lower quadrant of the classification screen 8 has a particle size of 13 mm or less. do.

In addition, the small sintered light stored in the small sintered light bin 16 is divided by the classification screen 17, the small sintered light having a particle diameter of 5 mm or more is stored in the small sintered light weighing tank 19 via the belt conveyor 18, and the classification screen The bottom portion of (17) is returned to the sintering plant via the belt conveyors 20 and 21 and the sintered semi-reflective storage tank 12.

However, at the time of charging by specific size, the belt conveyor 13 proceeds to the right direction in the drawing, and the lower part of the classification screen 8 is conveyed directly to the sintering plant by the belt conveyor 20.

On the other hand, the coarse coke (CⅠ, CII) of the Goke coke weighing tank (5) and the allotropic sintered light (OLI, OLII) of the coarse sintering light casting tank 11 and the small sintered light (SS) of the small sintered light weighing tank 19 are As shown in FIG. 3, the belt conveyor 23 is sequentially transported by the zezer system as shown in FIG. 3, and then the blast furnace (28) is made in the order of cost (CI, CII), allelic sinter (OLI, OLII), and small sintered ore (SS). It is charged in).

This will be described in more detail as follows.

In Fig. 3, the various input light quantity setting data input to the data input and display 51 are displayed on the data input and display 51 by the data transmission and graphic controller 53.

In addition, the data transmission and graphic controller 53 is controlled by the processor computer 52, and when the basis weight of the raw material in the basis weight controller 54 transmits the execution signal to the second input force module 74.

On the other hand, the data transmission via the first input and output module 55 and the output data of the graphic controller 53 is the program logic search unit 90 to search for errors in the control program.

Here, the fiber type selector 56 determines whether there is only one light type selected in one batch, and generates an error signal er if not one.

The top import raw material compatibility determiner 57 determines whether the second raw material going to the same top hopper is the same as the first raw material, and generates an error signal if it is different.

The top hopper selector 68 generates an error signal when two top hoppers are selected at the same time.

The swing chute rotation limiter 59 generates an error signal if the total number of revolutions of the chute is programmed outside the 3-20 revolution range.

The swing chute rotation speed finder 60 searches whether the rotation speed of the chute is the same in the same light type and the same amount, and generates an error signal if it is different.

The dump selector 61 determines whether a dump is selected for the second batch going to the same hopper on the program input display, and generates an error signal if not selected.

In this way, the data searched by the program logic search unit 90 is stored in the first and second hopper memories 62 and 63 of the memory unit 110, respectively, and according to the control signal of the first input / output module, the blast furnace control unit 100 Will send the work order.

In the blast furnace control unit 100, when the raw material is discharged from the relay discharge controller 64 of each raw material according to the second input / output module 74, the raw material programmed by the raw material tracking controller 65 is tracked and the top hopper controller 66 Will be controlled.

Thereafter, the charging is completed in the blast furnace by the sequential execution of the charge dump controller 67, the drive unit controller 68, and the flow control gate controller 69.

When the charging is completed in the blast furnace, since the tracking signal is generated from the level tracking signal generator 71 by the charge dump completion detector 70, the charge dump controller 67 of the next raw material is controlled by the level detector 73. .

On the other hand, the output data of the flow control gate controller 69 and the level tracking signal generator 71 is provided to the raw material request controller 72 to transmit the raw material request signal through the first I / O module 55 and the graphic controller 53. Will be exported.

In such a conventional blast furnace raw material loading control system, firstly, the processing of excess small sintered ore is difficult and thus the waste is large.

In other words, if there are 8 classification screens, the trees are appropriately placed in 8-13mm size, and the amount of small sintered ore required for blast furnace loading and the amount of small sintered sintered in the lower part of the sintered ore screen are used to maintain equilibrium. Since the size of the pastoral wear increases as the life of the mat is proportional to the number of days of use, excessive sintering of the granules is required.

Therefore, it is necessary to replace the screen mat at a certain price, and during the screen mat replacement period, the work of conveying and re-sintering the excessive sintered sintered particles to the sintering plant is necessary, and at this time, the belt conveyor which carries the excessive small sintered ore There is a problem that is overloaded.

Second, because the screen bottom for charging by particle size, that is, small sintered ore is difficult to process, it becomes difficult to switch from the charging system by particle size to the charging system by non-particle size, and thirdly, the particle size by the non-particle loading system, which is the inverse of the second problem. When switching to a separate loading system, it is necessary to replace the screen mat according to the preplanning.

Fourth, in the case of particle size loading, the sintered ore sintered ore is separated from the hoppers A and B in the order of Goe coke-sintered ore. When the small sintered mineral is charged, the ratio is detected and loaded below the standard level of the blast furnace charge. As a result, Coke's imports and incomplete preparations for Coke result in a decrease in the reference level of the blast furnace and a poor distribution of coke in the blast furnace.

This, in turn, leads to an increase in fuel costs.

The present invention is intended to solve this problem, and it is possible to charge into the non-particle sized charge as a classification screen for different sized charges, to facilitate the treatment of excess small sintered ore, and also to add an early batch call system. Therefore, it is an object of the present invention to provide a raw material loading control system in the blast furnace that can prevent the blast furnace loading delay when entering by size.

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

As shown in FIG. 2, the data transfer and graphics controller controller 53 is mutually data-processed with the first and second input / output modules 55 and 74, the processor computer 52, and the data input and display 51. FIG. The input data passed through the first input / output module 55 is searched by the program logic search unit 90, and the normal program searched by the program logic search unit 90 is a first program of the memory unit 110. 2 is configured to be stored in the hopper memories 62 and 63.

The program logic search unit 90 is a variety selection searcher 56, mixed loading searcher 75, mixed feed dump selector 76, open import raw material determiner (57), open hopper selector (58) swing chute rotational speed The limiter 59 is constituted by a turning chute extra water searcher 60 and a dump selector 61.

The output data of the memory unit 110 is connected to control the blast furnace control unit 130 in sequence under the control of the first input and output module 55.

The blast furnace control unit 1300 is a relay tank discharge controller 64, the raw material tracking controller 65, the hopper controller 66, the charge dump controller 67, the drive unit controller in accordance with the output of the second input and output module 74 68, the flow control gate controller 69, the charge dump completion detector 70, the level tracking signal generator 71, the raw material request controller 72 is sequentially controlled to feed the raw material request signal to the first input and output module 55 Configure the connection to send.

At this time, the output data of the raw material request eliminator 72 is connected by the batch line search signal generator 79 to be supplied to the charging signal generator 77 for each particle size and the charging signal generator 78 for each particle size. And the output data of the non-depth specific charge signal generators 77 and 78 are connected to the level detector 73 and the flow regulating gate controller 69, respectively.

In addition, the level tracking signal from the level tracking signal generator 71 is simultaneously passed to the charge dump controller 67 and the raw material request controller 72 through the level detector 73 together with the signal of the particle size loading signal generator. Configure the connection to be provided.

On the other hand, the output data of the second input and output module 74 is a non-particle size loading control unit consisting of a sintered optical hopper gate open controller 80, a hopper gate driver 81 and a raw material discharge completion detector 82 through a snap switch 34. And configured to be provided to 140.

Referring to the operation and effects of the present invention as described above are as follows.

In FIG. 2, the input program entering through the first input / output module 55 is the fiber selection unit 56 of the program logic search unit 90. If one is selected as one type selection for one batch, the raw material is imported. The conformity decision machine 57 determines the imported raw material, and if the selection of the species is not one, that is, the mixed loading, the mixed loading dump selector 76 searches for the correct selection of the dump through the mixed charging search 75. .

At this time, if the contents of the program and the contents of the processor computer 52 are different, an error signal er is generated to generate an error in the data input and display 51 through the first input / output module 55, the data transmission and the graphic controller 53. It will indicate the occurrence.

On the other hand, the mixed charge selector 76, the top import raw material determination machine 57, the top hopper selector 58, the swing chute speed limiter 59, the swing chute rotation speed finder 60, and the dump selector 61 If an error does not occur in the sequential processing), the program inputted from the data input and display 51 is stored for each hopper in the first and second hopper memories 62 and 63 of the memory unit 110, respectively.

The stored program data of the memory unit 110 is controlled by the processor computer 52 that has passed through the first input / output module 55, so that the blast furnace control unit 100 controls the loading of raw materials in the furnace.

That is, according to the control signal of the second input and output module 74, the relay is installed on the relay discharge controller 64, the sensor installed on the belt conveyor 23 to control the discharge of the relay and the weighing tank (5, 11, 19) Raw material tracking controller 65, hopper controller 66, charge dump controller 67, drive unit controller 68, flow control gate controller 69, charge dump completion detector 70, level trace signal generator ( 71 and the raw material request controller 72 are sequentially controlled by the memory unit 110 to provide the raw material request signal to the first input / output module 55.

Therefore, when the uppermost level of the charge in the first blast furnace 28 falls below the management standard due to the melting of the iron component at the bottom of the blast furnace, the sounding 24 rises → the turning chute 25 tilts and the lower seal valve ( 26) Open → Flow control gate (27) Opening degree → Completed discharge of A or B hopper hopper → Flow control gate (27) Close → Lower seal valve (21) Close and swing chute (25) Stop → Sounding (24) ) In accordance with the order of recommendation, the relay tank discharge of the raw material for import of the next top hopper will be made on the wounding 24, the starting point of the charging procedure.

That is, the batch line retrieval signal generator 79 which has passed through the level tracking signal generator 71 and the particle size loading signal generator 77 of FIG. And the raw material request controller 72 is provided at the same time.

Therefore, it is possible to prevent the loading time delay of the raw material at the time of charging by size.

Prior to this, in the belt conveyor 23 of FIG. 1, coke (CI, CII) allele sintered ore (OLI, OLII) and small sintered ore (SS) are normally loaded in sequence, but when the excess small sintered ore occurs, coke (CⅠ, CII), allele sintered light (OLI) + small sintered light (SS), allele of sintered light (OLII), small sintered light (SS) A, B) is stored in the above-described order, because the blast furnace control unit 130 properly controls the pivot chute 25, the lower seal valve 26, the flow control gate 27, the blast furnace 28 In the coke layer (CI + CII), the blast furnace side wall part is allergic sintered light + small sintered light (OLI + SS), the blast furnace center part is allergic sintered light (OLII), and the blast furnace side wall part generated by charging There is a small sintered ore (SS) is sequentially charged.

On the other hand, when switching from the particle size charging system to the non-particle size charging system by turning on the snap switch 34 does not require a separate classification screen replacement.

For this reason, the sintered optical hopper gate controller 80, the hopper gate driver 81, and the raw material discharge completion detector 82 in the non-particle size control unit 140 are sequentially controlled by the output data of the second input / output module 74. In addition, the flow rate control gate 69 is operated by the specific particle size charging signal generator 78 in the blast furnace control unit 130, and the specific particle size charging is performed according to the sequential operation executed thereafter.

The present invention as described above, the system switching between the size-by-size and the non-size-to-charge between each other is simply made without replacing the separate classification screen, the treatment of the excessive small sintered light generated at the time of charging by the particle size simply do.

In addition, it is easy to control the coke charge distribution in the blast furnace by preventing the charge delay after the small sintered mineral is charged, and there is a unique effect of bringing stability of the furnace sulfur, improvement of productivity and life extension of the blast furnace.

Claims (1)

In a blast furnace raw material loading system composed of data input and display, a processor computer, a data transmission and graphic controller, an input / output module, a program logic search unit, a memory unit and a blast furnace control unit, the program logic search unit has an error output of the fiber type selector 56. Through the mixed charge detector 75 and the mixed charge selector 76 and the normal output of the fiber type selector 56 to be provided to the imported raw material suitable determiner 57, and the pivot chute electric water detector 60 and The output of the dump selector 61 is ored to be output to the memory unit 110, and the blast furnace control unit has an output of the raw material controller 72 through the signal generators 77 and 78 for each particle size and each particle size. It is configured to be provided to the level detector 73 and the flow regulating gate controller 69, the output of the level tracking signal generator 71 and the particle size loading signal generator 77 through the level detector 73, the charge dump controller ( 67) and the raw material request controller 72, and the output of the second I / O module 74 through the snap switch 34 is the sintered optical hopper gate open controller 80, the hopper gate driver 81, the raw material Raw material loading control system in the blast furnace, characterized in that configured to be provided to the non-particle size charging control unit 140 composed of the discharge completion detector (82).