KR101382764B1 - Apparatus and method of determining roll unit reorganization - Google Patents

Abstract

Provided are an apparatus and a method of determining reorganization of slabs in a unit of roll. The apparatus for determining the reorganization of slabs in the roll unit includes: an estimated residence time calculating unit for calculating an estimated residence time of a slab that is presently charged in a heating furnace by adding up a rolling pitch of each slab, which is presently charged in the heating furnace, among slabs provided in the unit of one roll; a minimum residence time calculating unit for calculating a minimum residence time of the slab to be presently charged in the heating furnace from performance data; and a reorganization determining unit for determining a reorganization state of the slabs in the unit of the roil based on the estimated residence time and the minimum residence time which have been calculated, thereby reducing the consumption of fuel in the heating furnace while increasing the whole production. [Reference numerals] (110) Storage unit; (120) Estimated residence time calculating unit; (130) Minimum residence time calculating unit; (140) Reorganization determining unit; (AA) Rolling pitch; (BB,DD) Furnace entrance; (CC) Loading side; (EE) Charging zone; (FF) Preheating zone; (GG) Heating zone; (HH) Equilibrium heating zone; (II) Extracting side

Description

Device and method for determining roll unit realignment {APPARATUS AND METHOD OF DETERMINING ROLL UNIT REORGANIZATION}

The present invention is for determining whether to realign the roll unit to be charged into the furnace.

In general, the heating furnace is divided into furnace inlet, charging zone, preheating zone, heating zone, and soaking zone, and slabs, etc., exit from the inlet side through the working beam device. It is to be discharged after heating with a burner while moving to the side. Slabs, etc. discharged from the furnace are made into the final product of desired thickness through rough rolling process and finish rolling process.

In the above-described heating furnace, slabs are continuously charged. As the slab proceeds toward the outlet, new slabs are charged at the inlet side, and the charged slabs are organized in a unit of roll. Here, the 'roll unit' refers to the same working group that can work continuously at one time in consideration of the rolling conditions in consideration of the roll wear and fatigue in the process and the rolling conditions and the amount of material in the subsequent process.

Typically, one roll unit will contain a variety of slabs of different thicknesses, widths, and lengths, typically from 80 to 120 sheets, and the ash time per sheet ('ash time' is the desired extraction target temperature). The time the slab stays in the furnace for different purposes, and if the number of slabs included in the roll unit is large, the time to wait to enter the furnace due to the different ash time between them This increases the fuel consumption of the furnace as well as reducing the overall production.

The present invention provides an apparatus and method for determining roll unit realignment that can reduce fuel consumption of a furnace and increase overall production.

According to the first embodiment of the present invention, among the slabs included in one roll unit, the rolling pitch of each slab currently charged in the heating furnace is added to the expected ash to derive the time to the expected ash of the slab to be currently loaded. A time derivation unit; A minimum free time deriving unit that obtains a minimum free time of the slab to be loaded from performance data; And a realignment determining unit configured to determine whether to realign the roll unit based on the derived expected ash time and the obtained minimum ash time.

According to the embodiment of the present invention, the realignment determination unit may determine the realignment of the roll unit when the derived predicted ash time is less than the obtained minimum ash time.

According to an embodiment of the present invention, the rolling pitch may be a time from when the slab enters the finishing mill to the next slab entering the finishing mill.

According to an embodiment of the present invention, the heating furnace includes a plurality of heating furnaces, and slabs included in the one roll unit may be sequentially loaded into the plurality of heating furnaces.

According to the second embodiment of the present invention, in the expected time derivation unit, the expected pitch of the slab to be currently loaded by adding the rolling pitch of each of the slabs currently loaded into the furnace among the slabs included in one roll unit. A first step of deriving time; A second step of obtaining a minimum ash time of the slab to be currently loaded from the historical data in the minimum ash time deriving unit; And a third step of determining, by the realignment determining unit, whether or not to realign the roll unit based on the derived expected ash time and the obtained minimum ash time.

According to an embodiment of the present invention, the third step may determine the realignment of the roll unit when the derived estimated ash is less than the obtained minimum ash time.

According to an embodiment of the present invention, the rolling pitch may be a time from when the slab enters the finishing mill to the next slab entering the finishing mill.

According to an embodiment of the present invention, the heating furnace includes a plurality of heating furnaces, and slabs included in the one roll unit may be sequentially loaded into the plurality of heating furnaces.

According to one embodiment of the present invention, by determining whether to realign the roll unit based on the expected ash time of the slab to be loaded currently and the minimum ash time obtained from the performance data, it is possible to reduce the fuel consumption of the furnace and at the same time reduce the overall production volume. Can be increased.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the roll unit realignment determination apparatus by one Embodiment of this invention.
2 is a diagram illustrating a structure of one roll unit.
3 is a view showing a charging sequence of the slab when a plurality of heating furnaces are provided.
It is a flowchart explaining the roll unit realignment determination method by one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. The shape and the size of the elements in the drawings may be exaggerated for clarity and the same elements are denoted by the same reference numerals in the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the roll unit reassembly determination apparatus which concerns on one Embodiment of this invention, FIG. 2 is a figure which shows the structure of one roll unit, FIG. 3 is a charge of a slab when it is equipped with several heating furnaces. It is a figure which shows a procedure.

As illustrated in FIG. 1, the apparatus for determining roll unit realignment according to one embodiment of the present invention includes a rolling pitch of each slab currently loaded into the heating furnace 1 among the slabs included in one roll unit. In addition, the time derivation time to obtain the time to the expected ashes of the slab to be loaded currently, the time deriving unit 120 and the minimum ashes to find the time with the minimum ashes of the slab to be currently charged from the past performance data stored in the storage unit 110. The unit 130 may include a reorganization determining unit 140 that determines whether to realign the roll unit based on the estimated expected ash time and the obtained minimum ash time.

On the other hand, the heating furnace 1 to which the roll unit knitting determining apparatus according to one embodiment of the present invention is applied is continuously arranged from the charging side to the extraction side in the furnace body, and the slab S to be heated is seated thereon. The conveyed skid beam 3 is installed. This skid beam 3 is largely composed of a fixed beam for supporting the slab S and a walking beam for advancing the charging slab.

While the slab S is heated in the furnace 1, the working beam gradually moves from the inlet of the furnace 1 to the outlet by raising, advancing, lowering and reversing the slab S.

The inner space of the furnace 1 is largely divided into a furnace entrance, a charging zone, a preheating zone, a heating zone, and a soaking zone along the direction in which the Skeet beam 3 passes. Depending on the initial temperature of the slab (S), the final temperature required during extraction, the temperature increase rate and residence time in the charging zone, preheating zone, heating zone and residence time in the crack zone are respectively controlled.

Meanwhile, in the furnace of the charging stand, the preheating stand, the heating stand, and the cracking stand, as shown in FIG. 1, the temperature measuring modules 111 to 114 are respectively installed, and the position thereof is along the conveying direction of the slab S. The entrance, preheating zone, heating zone, and cracking zone are installed at a certain distance from each inlet.

Then, the entrance to the slab (S) is charged through the door (not shown) that is periodically opened and the charging and preheating zone for raising the slab (S) is partitioned by a trimming wall (2) installed on the inner wall of the furnace body. This trimming wall 2 makes it possible to ensure heat retention and uniform temperature in each region.

In addition, in the charging zone, preheating zone, heating zone, and cracking zone, combustion burners F1 to F4 for adjusting the heating temperature of the slab S according to the temperature of the preheating zone are installed, and the burners F1 to F4 are temperature controlled. Under the control of the module (not shown), the heating temperature of the slab S is increased to allow heating to the target temperature. Typically, the combustion burner F1 installed at the charging station may use a regenerative burner, and the other combustion burners F2 to F4 may use an axial burner.

On the other hand, each region is partitioned between the preheating zone, the heating zone, and the heating zone and the crack zone by the nose portions 4 and 5 formed so that the internal cross-sectional area of the furnace is small.

In this way, the nose portions 4, 5 are formed in the combustion burners (F2, F3, F4) for heating the respective regions are installed on the inclined surface of the nose portion (4, 5), the spray direction is preheated, heating table, This is to point towards the inner center of the crack.

Hereinafter, with reference to FIGS. 1-3, the roll unit knitting determination apparatus by one Embodiment of this invention is demonstrated in detail.

Referring to FIGS. 1 to 3, first, the storage unit 110 may include slab width, slab thickness, slab steel grade, charging temperature, and waiting time for each slab included in one roll unit 200. Data ").

Here, the roll unit refers to the same work group that can work continuously at one time in consideration of the rolling conditions in consideration of the roll wear and fatigue in the process and the rolling conditions and material amount in the subsequent process, the roll unit is illustrated in FIG. It is shown.

As shown in FIG. 2, one roll unit 200 may be loaded in the order of a coffin type, and the adjusting material 201, the transition material 202, and the slabs 203 which are main coils may be loaded in this order. In addition, a recovery material 204 or a riot agent 205 may be inserted between the slabs 203. About 30 slabs may be included before and after the recovery material 204 or the anti-riot agent 205.

Here, the adjusting material 201 is a rolling material that is put into the early roll unit after the roll replacement for the purpose of crown and shape management of the slab in one roll unit 200. And the transition material 202 is a rolled material of the intermediate size inserted in order to prevent the shape and the board | substrate defect which generate | occur | produce by the sudden change of a rolling size. The recovery material 204 is a rolling material which is easy to roll inserted in the middle in order to improve the roll surface protection and the sheet-passability when the rolling amount is excessive in the same roll unit. Reference numeral 205, which is not described, denotes a riot warfare.

On the other hand, the expected ash time deriving unit 120, by adding the rolling pitch of each of the slabs currently loaded in the furnace 1 of the slabs included in one roll unit, the estimated ash time of the slab to be currently loaded Can be derived. The estimated time may be transferred to the reorganization determining unit 140.

That is, the time deriving unit 120 may derive the time as the expected ash of the slab to be loaded by adding the rolling pitches of all the slabs charged to the heating furnace 1 in advance of the slab to be charged. Here, the rolling pitch refers to the time until the slab enters the finishing mill after the slab enters the finishing mill (not shown).

In addition, the minimum ash time deriving unit 130 may obtain the minimum ash time of the slab to be currently loaded from past performance data stored in the storage 110. The obtained minimum ash time may be transmitted to the realignment determining unit 140.

Finally, the realignment determination unit 140 determines whether to realign the roll unit based on the expected ashes received from the time deriving unit 120 and the minimum ashes received from the time deriving unit 130. Can be. Here, the meaning of "reorganizing the roll units" means changing the charging order of the slabs included in one roll unit 200.

In detail, the realignment determination unit 140 may determine to reorganize the roll unit when the time is smaller than the minimum ash determined by the derived expected ash.

Meanwhile, according to the embodiment of the present invention, the heating furnace 1 may include a plurality of heating furnaces, in which case slabs included in one roll unit 200 may be sequentially loaded into the plurality of heating furnaces. Can be.

That is, as shown in FIG. 3, when three heating furnaces 1, 2, and 3 are provided, the slabs S1 to S24 included in one roll unit 200 may be the first heating furnace 1. The second heating furnace 2 and the third heating furnace 3 may be sequentially charged.

As described above, according to one embodiment of the present invention, the fuel consumption of the furnace by determining whether to realign the roll unit based on the expected ash time of the slab to be currently loaded and the minimum ash time obtained from past performance data. In addition, the overall yield can be increased at the same time.

Hereinafter, the method for determining roll unit realignment according to one embodiment of the present invention will be described with reference to FIGS. 1 to 4. However, for the sake of brevity of the invention, descriptions of overlapping parts with respect to FIGS. 1 to 3 will be omitted.

1 to 4, first, as an expected material, the time deriving unit 120 adds the rolling pitch of each slab currently loaded in the heating furnace 1 among the slabs included in one roll unit. Time can be derived from the expected ash of the slab to be loaded (S401). The estimated time may be transferred to the reorganization determining unit 140.

Here, the rolling pitch refers to the time until the slab enters the finishing mill after the slab enters the finishing mill (not shown).

In addition, the minimum ash time deriving unit 130 may obtain the minimum ash time of the slab to be currently loaded from the past performance data stored in the storage 110 (S402). The obtained minimum ash time may be transmitted to the realignment determining unit 140.

Finally, the realignment determination unit 140 determines whether to realign the roll unit based on the expected ashes received from the time deriving unit 120 and the minimum ashes received from the time deriving unit 130. It may be (S403). Here, the meaning of "reorganizing the roll units" means changing the charging order of the slabs included in one roll unit 200.

In detail, the realignment determination unit 140 may determine to reorganize the roll unit when the time is smaller than the minimum ash determined by the derived expected ash.

Meanwhile, according to the embodiment of the present invention, the heating furnace 1 may include a plurality of heating furnaces, in which case slabs included in one roll unit 200 may be sequentially loaded into the plurality of heating furnaces. May be as described above.

As described above, according to one embodiment of the present invention, the fuel consumption of the furnace by determining whether to realign the roll unit based on the expected ash time of the slab to be currently loaded and the minimum ash time obtained from past performance data. In addition, the overall yield can be increased at the same time.

The present invention is not limited by the above-described embodiment and the accompanying drawings. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be self-evident.

1: Heating furnace 2: Four cliff
3: skid beam 4, 5: nose portion
110: storage unit 120: time derivation unit with the expected ash
130: minimum rework time derivation unit 140: realignment determination unit
200: roll unit 201: adjusting material
202: transition material 203: slab
204 Restoration Material 205
111 to 114: temperature measuring module F1 to F4: combustion burner
S; Slab

Claims (8)

A time deriving part which adds a rolling pitch of each slab currently loaded into a heating furnace among slabs included in one roll unit, thereby deriving time to an expected ash of a slab to be currently loaded;
A minimum free time deriving unit that obtains a minimum free time of the slab to be loaded from performance data; And
And a realignment determination unit configured to determine whether to realign the roll unit based on the derived expected ash time and the obtained minimum ash time. The method of claim 1,
The realignment determination unit,
The roll unit realignment determination device for determining the realignment of the roll unit when the time to the derived expected ash is less than the obtained minimum ash time. The method of claim 1,
The rolling pitch is
The roll unit realignment determining apparatus, which is the time from when the slab enters the finishing mill to the next slab entering the finishing mill. The method of claim 3,
The furnace includes a plurality of furnaces,
Slabs included in the one roll unit are roll unit re-determination determination device is sequentially charged in the plurality of heating furnaces. A first step of deriving the time to the expected ash of the slab to be currently loaded by adding a rolling pitch of each slab currently loaded into the furnace among the slabs included in one roll unit in the expected ashing time deriving unit;
A second step of obtaining a minimum ash time of the slab to be currently loaded from the historical data in the minimum ash time deriving unit; And
And a third step of determining, by the realignment determining unit, whether or not to realign the roll unit based on the derived expected ash time and the obtained minimum ash time. 6. The method of claim 5,
In the third step,
The roll unit realignment determination method for determining the realignment of the roll unit when the time to the derived expected ash is less than the obtained minimum ash time. 6. The method of claim 5,
The rolling pitch is
A method for determining roll unit realignment, which is the time from when a slab enters the finishing mill to the next slab entering the finishing mill. 8. The method of claim 7,
The furnace includes a plurality of furnaces,
The slab included in the one roll unit is loaded in the roll unit re-determination determination sequentially in the plurality of heating furnaces.

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