KR101696736B1 - Apparatus for transferring supplementary raw material in electric furnace - Google Patents

Apparatus for transferring supplementary raw material in electric furnace Download PDF

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Publication number
KR101696736B1
KR101696736B1 KR1020150130082A KR20150130082A KR101696736B1 KR 101696736 B1 KR101696736 B1 KR 101696736B1 KR 1020150130082 A KR1020150130082 A KR 1020150130082A KR 20150130082 A KR20150130082 A KR 20150130082A KR 101696736 B1 KR101696736 B1 KR 101696736B1
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South Korea
Prior art keywords
belt conveyor
hopper
hearth
transported
sub
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KR1020150130082A
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Korean (ko)
Inventor
조길동
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주식회사 포스코
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
    • B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G65/00—Loading or unloading
    • B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
    • B65G65/32—Filling devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2812/00—Indexing codes relating to the kind or type of conveyors
    • B65G2812/01—Conveyors composed of several types of conveyors
    • B65G2812/012—Conveyors composed of several types of conveyors for conveying material successively by a series of conveyors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Conveyors (AREA)

Abstract

A submaterial transport apparatus is disclosed. A sub-material transporting apparatus according to an embodiment of the present invention includes a hearth hopper for providing a sub-raw material to a converter, a ground hopper for storing a sub-material to be transported to the hearth hopper, a first belt conveyor for transporting the subsidiary material discharged from the ground hopper, A second belt conveyor for transporting the subsidiary material supplied from the first belt conveyor to the hearth hopper; a third belt conveyor for transporting the subsidiary material transported by the first belt conveyor to the second belt conveyor for transporting; The level sensor and the first belt conveyor to the third belt conveyor are used to transport the sub-raw material stored in the ground hopper to the hearth hopper, and when the sub-raw material is transported to the hearth hopper, The waiting time until the amount of subsidiary raw material of the hearth hopper becomes the lower limit is calculated, and according to the estimated waiting time calculated And a control unit for controlling the operation of the third belt conveyor.

Description

[0001] APPARATUS FOR TRANSFERRING SUPPLEMENTARY RAW MATERIAL IN ELECTRIC FURNACE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a sub-material transporting apparatus, and more particularly, to a sub-material transporting apparatus for supplying a sub-raw material used in a converter to a hearth hopper.

Generally, it is necessary to add an additive in the charcoal line from the hearth hopper installed on the upper portion of the converter. When the remaining amount of additive in the hearth hopper is small, supplementary materials are replenished from the ground hopper to the hearth hopper by using a belt conveyor provided between the hearth hopper and the ground hopper.

In the past, Noh Sang Ho Park was installed at a relatively higher level than the ground hopper.

Therefore, in order to raise the auxiliary raw material of the ground hopper to the hearth hopper by using the belt conveyor, the belt of the belt conveyor must be strongly rotated, so that a large force is required to rotate the belt. For this reason, the head motor used for rotating the belt on the belt conveyor uses a considerably high voltage. As a result, the head motor is likely to fail if it is repeatedly turned on and off frequently.

Japanese Laid-Open Patent Publication No. 2013-237878 (published on November 28, 2013)

An embodiment of the present invention is intended to provide a sub-material transporting device capable of more effectively preventing a failure of a belt conveyor for transporting a sub-raw material of a ground hopper to a hearth hopper.

According to an aspect of the present invention, a hearth hopper for providing a sub ingredient to a converter; A ground hopper in which the additive material to be transported to the hearth hopper is stored; A first belt conveyor for conveying the subsidiary material discharged from the ground hopper; A second belt conveyor for conveying the subsidiary material provided from the first belt conveyor to the hearth hopper; A third belt conveyor for pulling up and transporting the subsidiary material transported by the first belt conveyor to the second belt conveyor; A level sensor for sensing an amount of the sub-raw material of the hearth hopper; And transporting the sub-raw material stored in the ground hopper to the hearth hopper using the first belt conveyor to the third belt conveyor, and when the sub-raw material is transported to the hearth hopper, And a controller for controlling the operation of the third belt conveyor in accordance with the estimated waiting time calculated by the waiting wait time until the amount of the subordinate material in the hearth hopper reaches the lower limit .

The controller may stop the third belt conveyor if the calculated waiting time is longer than a preset time, and may maintain the operation of the third belt conveyor if the waiting time is shorter than a preset time.

Also, the predetermined time may be the time until the sub-raw material on the third belt conveyor is transported to the second belt conveyor.

And a control unit for controlling the supply of the target amount inputted through the input unit to the hearth hopper when the auxiliary material stored in the ground hopper is transported to the hearth hopper, And, when transported, control the operation of the third belt conveyor according to the calculated estimated waiting time.

In addition, when the sub-raw material stored in the ground hopper is transported to the hearth hopper, the controller determines the type of sub-raw material to be transported at present, and if the sub-raw material to be transported is a sedative, To judge whether or not. As a result of the determination, if the previously transported supplementary material is a supplementary material containing calcium oxide, it may further be characterized that the transfer of the sedative is suspended.

Further, the control unit may further include transporting the other sediment, and then delivering the sediment.

According to another aspect of the present invention, there is provided a furnace comprising: a plurality of hearth hoppers for providing an additive to a converter; A plurality of ground hoppers in which the additive to be transported to the hearth hopper is stored; A ground hopper feeder for discharging the subsidiary material stored in the plurality of ground hoppers; A first belt conveyor for conveying the sub-materials discharged from the plurality of ground hoppers; A second belt conveyor for conveying the subsidiary material provided from the first belt conveyor to the plurality of hearth hoppers; A third belt conveyor for pulling up and transporting the subsidiary material transported by the first belt conveyor to the second belt conveyor; A lower limit sensor for detecting a lower limit of the plurality of hearth hoppers; A level sensor for sensing an amount of subsidiary material of the plurality of hearth hoppers; And a lower hopper, wherein when the lower limit of one of the plurality of hearth hoppers is detected, the ground hopper feeder corresponding to the hearth hopper in which the lower limit is generated, the first belt conveyor to the third belt conveyor are operated, The submerged material stored in the ground hopper corresponding to the hearth hopper in which the lower limit is generated among the ground hoppers is transported to the hearth hopper where the lower limit is generated, and when the submerged material is transported to the hearth hopper in which the lower limit is generated, Stopping the first belt conveyor and the second belt conveyor and calculating an estimated waiting time until the amount of the subordinate material reaches the lower limit based on the amount of the subordinate material of the hearth hopper sensed through the level sensor, Is longer than the preset time, the third belt conveyor is stopped, and the waiting waiting time Li is shorter than the set time additives transport apparatus including a control section for holding the third operation of the belt conveyor can be provided.

The control unit may determine the kind of sub-raw material stored in the hearth hopper where the lower limit is generated when the sub-raw material is transported to the hearth hopper in which the lower limit is generated, and if the determined sub- To judge whether or not. When the previously transported subsidiary material is a supplementary material containing calcium oxide, it is further characterized in that the transport of the sediment is suspended and the other subsidiary material other than the supplementary material containing the calcium oxide is first transported and then the transported retentive sediment is transported can do.

The embodiment of the present invention can prevent the motor failure of the conveyor apparatus that transports the sub-raw material of the ground hopper from the ground hopper to the hearth hopper in the course of transporting the sub-raw material.

In addition, the embodiment of the present invention can prevent overflow of the furnace hopper from overflowing during the sub-material transportation.

In addition, the embodiment of the present invention can prevent the ignition of the raw material, which is likely to ignite like a soothing material, during transportation of the sub-raw material.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a configuration of an apparatus to which a submaterial transporting apparatus according to an embodiment of the present invention is applied. FIG.
2 is a control block diagram of a submaterial transport apparatus according to an embodiment of the present invention.
3 is a control flow chart for a method of transporting an additive in a submaterial transport apparatus according to an embodiment of the present invention.
4 is a control flow chart for a method of transporting a sediment after transporting a calcium oxide-containing additive in a submaterial transport apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments to be described below are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the width, length, thickness, etc. of components are exaggerated for the sake of convenience. Like reference numerals designate like elements throughout the specification.

FIG. 1 is a schematic view of a submaterial transport apparatus according to an embodiment of the present invention, and FIG. 2 is a control block diagram of a submaterial transport apparatus according to an embodiment of the present invention.

1 and 2, the submaterial transport apparatus includes a ground hopper 10, a hearth hopper 20, and a belt conveyor 30.

The ground hopper 10 is installed on the ground to store different kinds of subsidiary materials. The ground hopper 10 is arranged in a plurality of numbers in order to store various raw materials. The ground hopper 10 has a first ground hopper 10A storing a first subsidiary material, a second ground hopper 10B storing a second subsidiary material, a third ground hopper 10C storing a third subsidiary material, and a fourth subsidiary material And a fourth ground hopper 10D.

The ground hopper 10 is provided with a ground hopper feeder 11 installed so as to provide an auxiliary material from the ground hopper 10 to the belt conveyor 30. Each of the ground hopper feeders 11A, 11B, 11C and 11D is provided so as to correspond to each of the ground hoppers 10A, 10B, 10C and 10D.

Each of the ground hoppers 10A, 10B, 10C and 10D is provided with ground hopper lower limit detectors 12A, 12B, 12C and 12D for detecting the remaining amount of the subsidiary material stored in the corresponding ground hopper.

The hearth hopper 20 is installed on the upper portion of the converter to store different kinds of subsidiary materials. The hearth hopper 20 is arranged in a plurality of numbers in order to store various raw materials.

The hearth hopper 20 includes a first hearth hopper 20A for storing a first subsidiary material, a second hearth hopper 20B for storing a second subsidiary material, a third hearth hopper 20C for storing a third subsidiary material, And a fourth hearth hopper 20D for storing the subsidiary material.

The hearth hopper (20) is provided with a hearth hopper feeder (21) for providing a supplementary material in the hearth hopper to the converter (F). The sub-raw material in the hearth hopper 20 is put into the charcoal in the converter F by the hearth hopper feeder 21. Each hearth hopper feeder 21A, 21B, 21C, 21D is provided so as to correspond to each hearth hopper 20A, 20B, 20C, 20D.

Each of the hearth hoppers 20A, 20B, 20C and 20D is provided with hearth hopper lower limit detectors 22A, 22B, 22C and 22D for detecting the lower limit of the subsidiary materials stored in the hearth hopper and a hearth hopper upper limit detector 23A, 23B, 23C and 23D are provided.

Leveling machines 24A, 24B, 24C and 24D for detecting the level of raw materials of subsidiary raw materials stored in the hearth hopper are installed in the hearth hoppers 20A, 20B, 20C and 20D.

The belt conveyor 30 includes a belt portion having a plurality of rollers and a head motor portion. The belt portion is circulated and rotated by using a head motor portion operated by an electric force to transfer the subsidiary material provided in the ground hopper 10 to the ground hopper 10 ).

The belt conveyor 30 may include a first belt conveyor 30A, a second belt conveyor 30B and a third belt conveyor 30C.

The first belt conveyor 30A is provided on the ground hopper 10 side. The first belt conveyor 30A is disposed parallel to the raw material outlet side of each ground hopper 10. [

The first belt conveyor 30 transports the subsidiary material discharged from the ground hopper 10 to the second belt conveyor 30B.

The second belt conveyor 30B is disposed obliquely so that the sub-raw material can be supplied from the ground hopper 10 to the hearth hopper 20. [

The second belt conveyor 30B transports the subsidiary material transported from the first belt conveyor 30A to the third belt conveyor 30C.

The third belt conveyor 30C is provided on the hearth hopper 20 side. The third belt conveyor 30C is disposed in parallel to the raw material inlet side of each hearth hopper 20.

The third belt conveyor 30C transports the subsidiary material transported from the second belt conveyor 30B to the hearth hopper 20. [

The transport bogie 40 is provided on the third belt conveyor 30C and selectively transports the subsidiary material transported from the third belt conveyor 30C to the respective hearth hoppers 20A, 20B, 20C and 20D.

The input unit 50 can receive information related to the capacity of the respective hearth hoppers 20A, 20B, 20C, and 20D, the kind of the raw materials, and the weight of the raw materials from the operator.

The control unit 60 performs overall control of the submaterial transport apparatus. The controller 60 receives the sensing signals from the sensors 12, 22, 23, and 24, and controls the operations of the components according to the received sensing signals.

Hereinafter, the conventional operation will be described with reference to the submaterial transport apparatus according to an embodiment of the present invention.

First, charcoal and scrap iron are charged in the converter (F) and oxygen is supplied through the oxygen lance. As a result, the carbon in the molten iron is removed by the gas, and silicon, manganese, phosphorus, titanium and the like are removed by slag.

In addition, a thermal analysis is performed to adjust the temperature of the transfer end point of the molten steel. If there is no heat, add the heat transfer agent when the coolant is not enough.

In addition, a sediment is injected to prevent this phenomenon when a phenomenon of overflowing with slagging noge occurs during the refining of the converter. As described above, in order to remove impurities such as silicon by slag, a subsidiary material containing calcium oxide such as burnt lime, raw dolomite, light dolomite and the like is needed, and other additives are used to promote slag goods.

The above-mentioned subsidiary material is transported to the third belt conveyor 30 via the first belt conveyor 30A and the second belt conveyor 30B after leaving the ground hopper 10. The subsidiary material conveyed to the third belt conveyor 30C is supplied to the hearth hopper 20 selected by the conveyance truck 40. [

Generally, the amount of sub-raw material is calculated by calculating the capacity and the weight of the sub-raw material in the hearth hopper in which the lower limit is detected among the respective hearth hoppers 20A, 20B, 20C and 20D. At this time, the transport volume of sub-raw materials is estimated to be 80%, for example, the capacity that can be stored by the Noh Sang Ho ho.

When the sub-material transportation is started, the conveying truck 40 is positioned at the upper portion of the hearth hopper 20 where the lower limit is sensed, and when the conveyance truck is moved, the third belt conveyor 30C operates.

When the third belt conveyor 30C moves, power is supplied to the second belt conveyor 30B and the second belt conveyor 30B operates.

When the second belt conveyor 30B moves, the first belt conveyor 30A operates. At this time, the first belt conveyor 30A, the second belt conveyor 30B and the third belt conveyor 30C circulate in the direction for conveying the subsidiary material to the hearth hopper 20 in the ground hopper 10. [

When the first belt conveyor 30A is operated, the ground hopper feeder 11 is operated so that the subsidiary material stored in the ground hopper 10 is transferred to the first belt conveyor 30A and then the second belt conveyor 30B, The hopper 30C, and the conveyance truck 40 to be stored in the hearth hopper 20 and stored.

If the amount of the subordinate raw material set in advance in the hearth hopper 20 is conveyed or the lower limit of the ground hopper 10 is detected during transportation, the belt conveyors 30A, 30B and 30C are stopped in the reverse order of startup.

As described above, conventionally, the second belt conveyor 30B needs a lot of force when starting to raise the sub-materials on the conveyor from the ground hopper 10 to the hearth hopper 20, and the second belt conveyor 30B Since the voltage for moving the head motor uses a considerably high voltage and is frequently turned on and off, a failure of the head motor of the second belt conveyor 30B occurs a lot.

Further, due to the remaining amount accumulated in the hearth hopper 20 for a long period of time, the raw material capacity and the specific gravity of the hearth hopper 20 and the level of the hearth hopper are 80% However, as the capacity of the hearth hopper 20 is reduced, the subordinate material overflows to the outside of the hearth hopper 20. In this case, the worker loads the overflowing material into the hearth hopper 20 of the same name by using the shovel, thereby increasing work load on the worker.

The auxiliary material containing calcium oxide such as quicklime, raw dolomite, light dolomite and the like is a raw material that generates heat when it is mixed with water. The sedative is made of paper pulp and absorbs moisture. Since it is paper, Fire may occur.

Hereinafter, the operation of the submaterial transport apparatus according to the embodiment of the present invention will be described.

3 is a control flow chart for a method of transporting an additive in a submaterial transport apparatus according to an embodiment of the present invention.

3B, the control unit 60 controls the respective hearth hoppers 20A, 20B, 20C, and 20D using the information sensed through the respective hearth lower limit detectors 22A, 22B, 22C, (100) whether there is a lower limit of the supplementary raw material among the raw materials.

If it is determined in operation mode 100 that the subordinate material is the lower limit, the control unit 60 moves the conveyance truck 40 to the upper side of the hearth hopper, which is the lower limit of the subordinate material, in the operation mode 102.

In the operating mode 104, the control unit 60 actuates the third belt conveyor (104).

After operating the third belt conveyor 30C, the controller 60 activates the second belt conveyor 30B (106).

After operating the second belt conveyor 30B, the controller 60 actuates the first belt conveyor 30A (108).

When the first belt conveyor 30A is operated, the control unit 108 actuates the ground hopper feeder 11 of the ground hopper 10 to be transported (110). Accordingly, the ground hopper feeder 11 operates to discharge the subsidiary material stored in the ground hopper 10 to the first belt conveyor 30A. The subsidiary material discharged to the first belt conveyor 30A is sequentially transported to the hearth hopper 20 having the lower limit of the subordinate material through the second belt conveyor 30B, the third belt conveyor 30C and the transporting carriage 40 in order.

The control unit 60 detects the amount of subsidiary material of the hearth hopper 20 through the level device 24 provided in the hearth hopper 20 in the operation mode 112 while the subsidiary material is being transported to the hearth hopper 20 having the lower amount of the sub- (112).

In the operation mode 114, the control unit 60 compares the amount of subsidiary material detected in the operation mode 112 with a predetermined amount of subsidiary material or the amount of subsidiary material (or the amount of subsidiary material) input through the input unit 50, Whether the target amount has been transported. At this time, the preset amount of the subordinate material or the amount of the subordinate material inputted through the input unit 50 may be set lower than the amount of the subordinate material actually filled in the hearth hopper 20 in consideration of the amount of the subordinate material being conveyed through the belt conveyor 30.

 As a result of the determination in the operation mode 114, when the target amount is delivered to the corresponding hearth hopper 20, the control unit 60 stops the corresponding ground hopper feeder 11 (116). As a result, it is possible to prevent the amount of the sub-raw material from being excessively conveyed to the hearth hopper 20.

At the same time, the control unit 60 stops the first belt conveyor 30A (118).

Then, the control unit 60 determines whether a predetermined time, which is the time taken for the amount of the subordinate material to be transported to the second belt conveyor 30B to be transported to the third belt conveyor 30C, has passed (120).

When a predetermined time elapses in the operation mode 120, the control unit 60 stops the third belt conveyor 30C (122). Thus, the transportation of the subsidiary material is completed.

At this time, the second belt conveyor 30B is still in operation.

The control unit 60 detects the amount of subsidiary materials stored in the respective hearth hoppers 20A, 20B, 20C and 20D through the level machines 24A, 24B, 24C and 24D in the operation mode 124, The waiting wait time is calculated, and it is determined whether the calculated wait wait time is 30 minutes or longer (124). At this time, the estimated waiting time can be calculated using the variation of the amount of subsidiary material stored in each of the hearth hoppers 20A, 20B, 20C, and 20D over time.

If the waiting time is longer than 30 minutes as a result of the determination in the operation mode 124, the operation of the second belt conveyor is stopped (126).

On the other hand, if the estimated waiting time is less than 30 minutes as a result of the determination in the operation mode 124, the operation of the second belt conveyor is maintained (128). Conventionally, since the second belt conveyor 30B is used to pull the sub-raw material on the conveyor from the ground hopper 10 to the hearth hopper 20, the second belt conveyor 30B uses a relatively high voltage, 30B are often broken down. However, when the waiting time is shorter than 30 minutes, for example, the operation of the second belt conveyor can be maintained to prevent frequent operation and stopping of the second belt conveyor, Motor burnout can be reduced.

4 is a control flow chart for a method of transporting a sediment after transporting a calcium oxide-containing additive in a submaterial transport apparatus according to an embodiment of the present invention.

Referring to FIG. 4, first, in the previous transportation, the subsidiary material containing calcium oxide, for example, quicklime is transported to the hearth hopper 20 (200).

The controller 60 determines whether the amount of additive of the hearth hopper 20 stored in the operation mode 202 is a lower limit (202).

If it is determined in operation mode 202 that the amount of subsidiary material of the hearth hopper 20 stored in the sediment agent is a lower limit, the control unit 60 suspends the sediment transport (204).

In operation mode 206, it is determined whether or not the hearth hopper 20 stored with the subordinate material other than the sedative is the lower limit. If the hearth hopper 20 storing different kinds of subsidiary materials is not at the lower limit, the sediment transportation is continuously held and waited.

On the other hand, if it is determined in the operation mode 206 that the furnace hopper 20 storing different kinds of subsidiary materials is the lower limit, the controller 60 performs the transportation of the subsidiary material. 3, the first belt conveyor 30A to the third belt conveyor 30C are operated and transported. After completion of the transportation, the first belt conveyor 30A and the third belt conveyor 30C are rotated, And the second belt conveyor 30B for pulling up and transporting the subordinate material transported by the first belt conveyor 30A to the third belt conveyor 30C for transporting in accordance with the above waiting wait time . That is, if the estimated waiting time is longer than the preset time, the second belt conveyor 30B is stopped, and if the estimated waiting time is shorter than the predetermined time, the operation of the second belt conveyor 30B is maintained.

As a result of the determination in the operation mode 210, when the transport of the corresponding raw material is completed, the control unit 60 transports the sediment transported.

In the past, when a sediment containing calcium oxide such as quicklime, raw dolomite, light dolomite and the like is transported and immediately transported as paper pulp to transport a sediment that absorbs moisture well, the subsidiary material containing calcium oxide is heated However, in the embodiment of the present invention, it is possible to prevent the sediment from being transported immediately after transporting the saccharide containing calcium oxide, so that the risk of fire can be prevented in advance.

10: ground hopper 11: ground hopper feeder
20: hearth hopper 30A: first belt conveyor
30B: second belt conveyor 30C: third belt conveyor
40: Feed truck 50: Input unit
60:

Claims (8)

A hearth hopper providing an additive to the converter;
A ground hopper in which the additive material to be transported to the hearth hopper is stored;
A first belt conveyor for conveying the subsidiary material discharged from the ground hopper;
A second belt conveyor for conveying the subsidiary material provided from the first belt conveyor to the hearth hopper;
A third belt conveyor for pulling up and transporting the subsidiary material transported by the first belt conveyor to the second belt conveyor;
A level sensor for sensing an amount of the sub-raw material of the hearth hopper; And
The first belt conveyor to the third belt conveyor is used to transport the sub-raw material stored in the ground hopper to the hearth hopper, and when the sub-raw material is transported to the hearth hopper, And a control unit for controlling the operation of the third belt conveyor in accordance with the estimated waiting time calculated by the waiting wait time until the amount of subsidiary raw material of the hearth hopper reaches the lower limit. The method according to claim 1,
Wherein the controller stops the third belt conveyor if the calculated waiting time is longer than a predetermined time and maintains the operation of the third belt conveyor when the waiting time is shorter than a predetermined time. 3. The method of claim 2,
Wherein the predetermined time is a time until a subordinate material on the third belt conveyor is transported to the second belt conveyor. The method of claim 3,
And an input unit for receiving a target amount to be transported from the operator to the hearth hopper,
The control unit controls the operation of the third belt conveyor in accordance with the calculated estimated waiting time when the target amount inputted through the input unit is transported to the hearth hopper when the subsidiary material stored in the ground hopper is transported to the hearth hopper Substrate transport device. The method according to claim 1,
The controller determines the type of sub-material to be transported at the time of transporting the sub-raw material stored in the ground hopper to the hearth hopper, and if the sub-material to be transported is a sedative, it is determined whether the previously transported sub- Judging. Wherein the sediment transportation is suspended when the previously transported subsidiary material is a subsidiary material containing calcium oxide as a result of the determination. 6. The method of claim 5,
Wherein the control unit transports the other sediment, and then delivers the sediment. A plurality of hearth hoppers providing a sub-material to the converter;
A plurality of ground hoppers in which the additive to be transported to the hearth hopper is stored;
A ground hopper feeder for discharging the subsidiary material stored in the plurality of ground hoppers;
A first belt conveyor for conveying the sub-materials discharged from the plurality of ground hoppers;
A second belt conveyor for conveying the subsidiary material provided from the first belt conveyor to the plurality of hearth hoppers;
A third belt conveyor for pulling up and transporting the subsidiary material transported by the first belt conveyor to the second belt conveyor;
A lower limit sensor for detecting a lower limit of the plurality of hearth hoppers;
A level sensor for sensing an amount of subsidiary material of the plurality of hearth hoppers; And
When the lower limit of any one of the hearth hoppers of the plurality of hearth hoppers is detected through the lower limit detector, the ground hopper feeder corresponding to the hearth hopper in which the lower limit is generated, the first belt conveyor to the third belt conveyor, The sub-raw material stored in the ground hopper corresponding to the hearth hopper in which the lower limit is generated in the hopper is transported to the hearth hopper in which the lower limit is generated,
Stopping the operation of the ground hopper feeder, the first belt conveyor, and the second belt conveyor when the sub-materials are transported to the hearth hopper in which the lower limit is generated, based on the amount of subsidiary material of the hearth hopper sensed through the level sensor If the estimated waiting time is longer than a predetermined time, stops the third belt conveyor, and if the estimated waiting time is shorter than a predetermined time, And a control unit for maintaining operation of the belt conveyor. 8. The method of claim 7,
The controller determines the type of sub-raw material stored in the hearth hopper where the lower limit is generated when the sub-raw material is transported to the hearth hopper in which the lower limit is generated. If the determined sub-raw material is a sedative, the control unit determines whether the previously transported sub- Judging. When the previously transported subsidiary material is a supplementary material containing calcium oxide, it is further characterized in that the transport of the sediment is suspended and the other subsidiary material other than the supplementary material containing the calcium oxide is first transported and then the transported retentate is transported A subsidiary material transport device.
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Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS61217723A (en) * 1985-03-22 1986-09-27 Sumitomo Metal Ind Ltd Inventory management for hopper
KR20010063870A (en) * 1999-12-24 2001-07-09 오길록 Method for communicating of wireless using wireless communicating terminal with repeating function and trunk radio system function
JP2013237878A (en) 2012-05-11 2013-11-28 Jfe Steel Corp Feedstock transportation control apparatus and feedstock transportation control method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61217723A (en) * 1985-03-22 1986-09-27 Sumitomo Metal Ind Ltd Inventory management for hopper
KR20010063870A (en) * 1999-12-24 2001-07-09 오길록 Method for communicating of wireless using wireless communicating terminal with repeating function and trunk radio system function
JP2013237878A (en) 2012-05-11 2013-11-28 Jfe Steel Corp Feedstock transportation control apparatus and feedstock transportation control method

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