KR101417516B1 - Scale removing apparatus of furnace - Google Patents

Abstract

The apparatus for scaling a heating furnace according to an embodiment of the present invention provides a heating furnace scale processing apparatus capable of handling a scale accumulated in a crack zone in a heating furnace more safely and promptly without an operator's manual operation, A scale discharge opening provided in a bottom surface of the heating stand of the heating furnace; A scale discharge inducing portion communicating with the scale discharge opening portion to receive the scale and having an opening / closing door for discharging scale at a lower portion thereof; And a cooling unit connected to cool the scale discharge inducing unit.

Description

[0001] SCALE REMOVING APPARATUS OF FURNACE [0002]

The present invention relates to a scaling apparatus for a heating furnace, and more particularly to a scaling apparatus for a heating furnace capable of easily discharging a scale accumulated in a cracking zone in a push-type heating furnace in a hot- will be.

Korean Patent Laid-Open No. 10-2008-0111851 discloses a technique for an in-furnace scale processing apparatus for a heating furnace.

FIG. 1 is a schematic view showing a progress path of a workpiece passing through a heating furnace in a hot rolling step, FIG. 2 (a) is a schematic view showing a cooking processing state accumulated on the front side of a burner on the heating stand side of the heating furnace of FIG. 1, Figure 2b schematically illustrates the interior side of Figure 2a.

Generally, the hot rolling step is performed in the order of material, for example, slab heating, rough rolling, scrap rolling, cooling, and correction, to produce hot-rolled steel sheets. The slab, which is a material used in hot rolling, usually belongs to a material having a large thickness of about 120 to 300 mm, a width of 1200 to 2000 mm, and a length of about 1480 to 3000 mm. Before the rolling, And heated. The heating temperature of the slab is set so as to obtain the mechanical properties required in the cooling process as well as the load reduction in the rolling process, and the usual heating temperature is approximately 1200 to 1330 ° C.

The heating furnace 1 for heating the slab to the rolling temperature is divided into a preheating zone, a heating zone H and a crack zone. In each zone, a certain amount of fuel is continuously supplied to burn the burner 2 The required temperature is maintained.

As shown in Fig. 1, in the case of the pusher type heating furnace 1, when the slab 3 is conveyed along the conveyance table arranged on the charging side of the heating furnace 1 and reaches the charging position of the heating furnace 1, The charging pusher 5 as a charging device advances and the material is charged into the heating furnace 1 sequentially through the charging rails provided on the loading side of the heating furnace 1. By this series of operations, (1). ≪ / RTI >

The slab 3 charged into the heating furnace 1 is moved from the upper portion of the skid pipe 4 to the extraction point by the operation of the charging pusher 5 or the like and by the time of reaching the extraction point, Is opened so as to form a space necessary for slab extraction, and is then extracted into a conveying roll through the extracting device 8.

Here, the skid pipe 4 is arranged long at the upper end of the vertical beam 5 orthogonally to the vertical beam 5 arranged at regular intervals along the heating furnace 1, and is extended to the extraction side of the heating furnace 1 Respectively. These skid pipes 4 have a structure in which they are arranged at regular intervals in the width direction of the heating furnace 1.

Next, when the slab 3 moves along the skid pipe 4 as a loading pusher up to the extraction position of the heating furnace 1 and reaches the extraction position of the heating furnace 1, the extraction door (not shown) is opened, Is extracted as an extractor fork that enters the extractor 8, for example, the hole of the heating furnace 1, is placed on the extraction conveying roll, and proceeds to the next process, that is, the rolling process.

On the other hand, burners 2 are provided at the lower part of the heating table H as described above.

A heating table H and a crack plate 11 are sequentially moved in the sequence of a pusher type heating furnace 1 (for example, a heating furnace of a steel plate factory) ) Is about 1,250 ~ 1,340 ℃.

1, the slab 3 as a material moves in the interior of the heating furnace 1, particularly in front of the lower burner 2 of the heating table H, while the oxidized accumulation scale S is formed on the surface of the material, Is accumulated in a large amount.

Such a cumulative scale S can prevent the flame 9 of the lower burner 2 from being sprayed normally in the heating furnace 1 in the heating table H so that the thermal characteristics of the heating furnace 1, Thereby making it difficult to maintain the temperature for normal heating.

Therefore, in the furnace of the heating furnace 1, in particular, the cumulative scale S of the heating table H performing the material heating as much as possible prevents the flame 9 of the burner 2 from clogging, It is necessary to periodically open the side door 6 and remove the cumulative scale S by using the pushing pipe 10. [

2B, the side door 6 provided at the side of the heating furnace 1 is provided with a plurality of openings 6a, The worker has processed the cumulative scale S by using a separate push pipe 10.

However, in the scale of the furnace of the heating furnace 1, particularly in the cumulative scale processing in the lower portion of the heating table H, various problems have been caused as follows.

First of all, since the operator scales the internal scale of the heating furnace 1, which maintains a high temperature, manually by hand using a work tool, the work can not be performed quickly, The furnace flame 9 of the furnace 1 is released or heat transfer is caused to make it difficult to maintain the temperature of the furnace 1.

Particularly, when working on the periphery of the high-temperature heating furnace (1), it collects on the side of the side door during the processing of the accumulated scale, and if the processing is not perfect, a clearance is generated when the side door is closed, Emission occurs. And above all, there was concern about the safety accident of the worker working around the heating furnace (1) maintaining the high temperature.

Further, since it is difficult to effectively process the scale by the manual processing of the cumulative scale, the uniform heating of the heating furnace 1 through the discharge of the stable furnace 1 through the burner flame is not realized, The temperature difference of the material to be heated, for example, the slab, occurs, and the temperature deviation of the material causes a warp phenomenon in which the sheet rolled in the next rolling process is warped, meandered, or bent upward or downward.

Therefore, in the in-furnace scale treatment of the conventional heating furnace 1, there arises a wide range of problems in reducing the rolling quality during the rolling process. As a result, in the conventional case, the progress of the heating furnace (1) is not smooth, especially in the heating furnace (1) due to the delay in cumulative scale processing in front of the burner in the heating furnace (H) It will have an adverse effect.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a scaling apparatus for a heating furnace capable of handling a scale accumulated in a crack zone in a heating furnace more safely and quickly, without manual work by an operator .

Further, according to the present invention, the scale of the inside of the heating furnace is processed without the manual operation of the operator, so that it is possible to reduce the scale existing inside the heating furnace by manually opening the side door attached to the heating furnace And it is an object of the present invention to provide a heating furnace scale device capable of preventing a safety accident caused by a discharged flame.

An apparatus for scaling a heating furnace according to an embodiment of the present invention includes a scale discharge opening provided in a bottom surface of a heating stand of a heating furnace; A scale discharge inducing portion communicating with the scale discharge opening portion to receive the scale and having an opening / closing door for discharging scale at a lower portion thereof; And a cooling unit connected to cool the scale discharge induction unit, wherein the cooling unit includes: a cooling water circulation unit connected to supply the cooling water to the scale discharge induction unit to cool the scale discharge induction unit; And an air supply unit connected to the air injection hole provided in the scale discharge guide unit to cool the scale accumulated in the scale discharge guide unit.

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The cooling water circulation unit may include a cooling water storage tank in which cooling water is stored; A cooling water supply pipe connecting one side of the cooling line provided in the scale discharge inducing unit and the cooling water storage tank to supply cooling water to the cooling line; And a coolant return pipe connecting the other side of the coolant line to the coolant storage tank and providing the coolant discharged from the coolant line to the coolant storage tank.

The apparatus may further include at least one scale crushing unit for crushing the scale introduced into the scale discharge inducing unit.
According to another aspect of the present invention, there is provided an apparatus for scaling a heating furnace, comprising: a scale discharge opening provided in a bottom surface of a heating stand of a heating furnace; A scale discharge inducing portion communicating with the scale discharge opening portion to receive the scale and having an opening / closing door for discharging scale at a lower portion thereof; And a cooling unit coupled to cool the scale discharge inducing unit, and at least one scale shredding unit for shaking the scale introduced into the scale discharge inducing unit.

The scale crushing unit may be provided in two rows on the upper and lower sides of the scale discharge inducing unit.

The scale crushing unit may include a motor provided on a crushing base fixed to an outer wall of the scale discharge inducing unit; And a scale breaking screw for breaking the scale while one end is connected to the motor at the outside of the scale discharge inducing portion and the other end is located inside the scale discharge inducing portion and is rotated during operation of the motor.

The scale crushing unit may further include a crushing cylinder having one end fixed to the crushing base and the other end connected to the motor to move the crushing screw back and forth.

Further, the opening / closing door is slidably provided on the lower portion of the scale discharge guide portion by the forward / backward movement of the opening / closing cylinder provided at one side of the opening / closing door and is provided on the upper surface of the opening / closing door, May contain the refractory.

Also, a door air line may be connected to the opening / closing door to provide the low-temperature high-pressure air to the opening / closing door so that the door may be cooled by the scale.

The scale discharge guide portion may further include a scale storage portion that receives the scale discharged from the scale discharge guide portion when the opening and closing door is opened.

In addition, the scale discharge inducing portion may have a sloped surface whose upper portion is inclined upward toward the scale discharge opening portion, and the lower portion may be provided in a cylindrical structure.

According to the present invention, the scale accumulated in the cracks in the heating furnace can be processed without manual operation by the operator. Thus, according to the present invention, the scale of the inside of the heating furnace is processed without manual work by the operator, It is possible to prevent a safety accident caused by the flame emitted to the outside due to the opening of the side door attached to the heating furnace which occurred when removing the scale present in the heating furnace.

In addition, unlike the prior art, the present invention can process scales in a short cycle in a heating furnace, prevent temperature fluctuations of the material due to the presence of scales in the furnace, and provide high heat uniformly to the slabs The uniformly heated slab can be provided in the rolling process, and ultimately, the progress of the heating furnace can be progressed smoothly.

1 schematically shows a traveling path of a material passing through a heating furnace in a hot rolling process.
Fig. 2A is a schematic view showing a cooking process state accumulated on the front side of the burner on the heating stand side of the heating furnace of Fig. 1, and Fig. 2B is a schematic view of the inner side of Fig.
3 is a schematic view showing a state in which a heating furnace scale apparatus according to an embodiment of the present invention is installed in a heating furnace.
Fig. 4 is a partially enlarged view of A in Fig. 3,
Fig. 5 schematically shows an exploded perspective view of Fig. 4. Fig.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified into 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.

Fig. 3 is a schematic view showing a state in which a heating furnace scale apparatus 100 according to an embodiment of the present invention is installed in a heating furnace.

In the case of the pusher type heating furnace 1, the material 3 is conveyed along the conveyance table arranged on the charging side of the heating furnace 1 and is conveyed to the heating furnace 1, The material 3 is charged into the heating furnace 1 sequentially through the loading rails provided on the charging side of the heating furnace 1 after the charging and pressing device 5 as a charging device advances and a series of such In operation, the material 3 is heated while gradually passing through the inside of the heating furnace 1. Here, the material 3 may be a slab.

The material 3 charged into the heating furnace 1 is moved to the extraction point from the upper part of the skid pipe 4 by the operation of the charging pusher 5 or the like and by the time of reaching the extraction point, Is opened so as to form a space necessary for slab extraction, and then can be extracted to the conveying roll through the extracting device 8.

In the process described above, however, the scale 3 is generated on the surface of the workpiece 3 in a large amount in the interior of the heating furnace, particularly in the lower part of the heating table 20, in front of the burner 2 . When the scale S is accumulated, the flame 9 of the burner 2 is closed. In the heating furnace scale apparatus 100 according to the embodiment of the present invention, And mechanically processes the scale S accumulated in front of the workpiece 2 without manual operation by the operator.

3, the apparatus for scaling a heating furnace 100 according to an embodiment of the present invention opens the side door 6 to recognize the scale S accumulated on the lower part of the heating table 20 And can be installed at a lower portion of the heating table 20 at a position where the heating table 20 can be operated.

3 to 5, the heating furnace scale apparatus 100 according to an embodiment of the present invention includes a scale discharge opening 101a, a scale discharge inducing portion 110, a scale storage portion 120, An air supply unit 130, a cooling water circulation unit 140, and scale crushing units 150 and 160.

3 and 4, the scale discharge opening 101a is formed on the bottom surface of the heating table 20 of the heating furnace 1 in the moving path of the material 3 moving in the heating furnace 1, As shown in FIG. Here, the scale discharge opening 101a is an opening provided to discharge the scale S generated in the work 3 to the outside of the heating furnace 1. A scale discharge guide portion 110 may be installed under the scale discharge opening portion 101a.

In one embodiment of the present invention, the scale discharge guide portion 110 may include an exhaust induction body 111, an opening and closing door 115, and an opening and closing moving cylinder 117. The scale discharging induction unit 110 receives the scale S received from the scale discharging opening 101a and the scale S accommodated inside the opening and closing door 115 when the opening and closing door 115 is opened, .

In one embodiment of the present invention, the discharge inducing body 111 may be installed on the bottom surface of the heating stand 20 so as to communicate with the scale discharge opening 101a. A plurality of discharge inducing bodies 111 may be installed along the width direction W of the lower portion of the heating stand 20. [ Here, it is preferable that the inner wall of the discharge inducing body 111 is made of a refractory material so as not to be affected by the high-temperature scale S.

It is preferable that the discharge inducing body 111 has a funnel structure in which the upper portion has an inclined surface inclined upward toward the scale discharge opening portion 101a and the lower portion has a cylindrical structure, The opening and closing door 115 may be installed at a lower portion of the discharge inducing body 111 to provide an internal space in which the scale S is received in the discharge inducing body 111. [

The scale S introduced from the scale discharge opening 101a is easily introduced into the inner space 114 of the discharge inducing body along the inclined surface 111a of the discharge inducing body, And may be stacked on the inner space 114 of the body.

In this embodiment, the opening and closing door 115 is slidably installed along a guide groove (not shown) provided at a lower portion of the discharge inducing body 111, so that the discharge inducing body 111 can be slidably opened or closed Member. It is preferable that the opening and closing door 115 is made of the refractory 115a so that the upper surface, that is, the portion where the scale S is in contact, can sufficiently withstand the high temperature of the scale S.

In this embodiment, a cylinder rod 116 is connected to one side of the opening / closing door 115, and the cylinder rod 116 can be connected to the opening / closing movement cylinder 117. The opening and closing door 115 is moved forward and backward along a guide groove (not shown) provided at a lower portion of the discharge inducing body 111 in accordance with the forward and backward movement of the opening and closing movement cylinder 117, Can be operated.

In one embodiment of the present invention, the door air line 119 is connected to the opening / closing door 115. The door air line 119 is provided to cool the opening / closing door 115 at a high temperature by the scale S by providing low-temperature high-pressure air to the opening / closing door 115.

The scale receiving portion 120 accommodating the scale S discharged from the discharge inducing body 111 when the opening and closing door 115 is opened may be positioned below the opening and closing door 115 have. The scale storage unit 120 is installed at a lower portion of the scale discharge guide unit 110 so as to be movable along the width direction W of the lower portion of the heating table 20 and moves between the plurality of discharge guide bodies 111, And can receive the discharged scale S from each of the discharge induction bodies 111.

Further, the heating furnace scale apparatus 100 of the embodiment of the present invention may include a cooling section connected to cool the scale discharge inducing section 110. [

The cooling unit may include an air supply unit 130 and a cooling water circulation unit 140 for cooling the scale S received in the internal space 114 of the discharge induction body.

First, the air supply unit 130 will be described. In one embodiment of the present invention, the air supply unit 130 is a member for injecting low-temperature high-pressure air into the internal space 114 of the discharge induction body. In the present embodiment, the air supply part 130 may be inserted into one of the air injection holes 113a and 113b provided in the discharge induction body 111 at one end.

Here, the plurality of air injection holes 113a and 113b may be provided such that air is uniformly supplied to the entire inner space 114 of the discharge inducing body. . However, for convenience of explanation, the air injection holes 113a and 113b are provided in a two-row structure, for example, at the upper and lower portions of the discharge induction body 111, respectively. The air injection hole provided at the lower portion of the discharge inducing body 111 is referred to as a first air injection hole 113a and the air injection hole provided at an upper portion of the discharge inducing body 111 is referred to as a second air injection hole 113b, Quot;

The first air injection hole 113a is formed so as to face the first scale crushing unit 160 which will be described later and the second air injection hole 113b is formed in the second scale crushing unit 160 Can be formed facing each other. At this time, the first air injection hole 113a and the second air injection hole 113b are provided in two rows spaced apart by a predetermined distance. The first air injection hole 113a and the second air injection hole 113b may be provided with respective air supply portions 130. [

In operation of the air supply unit 130, the low temperature and high pressure air supplied from the air supply unit 130 is supplied to the internal space 114 of the discharge induction body through the first air injection hole 113a and the second air injection hole 113b Thereby cooling the scale S accumulated in the discharge inducing body 111 and cooling the scale crushing screw 155 to be described later so that the scale crushing screw 155 is less affected by the high temperature scale S can do.

Hereinafter, the cooling water circulation unit 140 will be described.

The cooling water circulating part 140 is connected to the scale discharge guide part 110 by a structure that absorbs the heat of the scale discharge guide part 110 by supplying cooling water to the scale discharge guide part 110 to cool the scale discharge guide part 110 Member. The cooling water circulation unit 140 may include a cooling water storage tank 141, a cooling water supply pipe 143, a cooling line 145, and a coolant return pipe 147. In this embodiment,

In one embodiment of the present invention, the cooling water storage tank 141 may be located outside the scale discharge inducing portion 110. A cooling water supply pipe 143 and a cooling water return pipe 147 may be connected to the cooling water storage tank 141. The cooling water supply pipe 143 and the cooling water return pipe 147 may be connected by a cooling line 145. Here, the cooling line 145 may be provided between the outer wall and the inner wall of the discharge inducing body 111. In this embodiment, seawater or industrial water at normal temperature may be used as the cooling water.

In this embodiment, a first valve 143a is provided in the cooling water supply pipe 143, and a second valve 147a is provided in the cooling water return pipe 147. [ In the open state of the first valve 143a and the second valve 147a, the cooling water in the cooling water storage tank 141 flows through the cooling water storage tank 141, the cooling water supply pipe 143, the cooling line 145, 147) < / RTI > At this time, the cooling water can cool the discharge inducing body 111 by absorbing heat from the discharge inducing body 111 through the cooling line 145.

Accordingly, as the cooling water flows through the cooling line 145, a temperature deviation may occur between the scale S attached to the inner wall of the discharge inducing body 111 and the discharge inducing body 111. At this time, the scale S attached to the inner wall of the discharge inducing body 111 can be easily separated from the inner wall of the discharge inducing body 111 due to the difference between the thermal expansion coefficient of the discharge inducing body 111 and the thermal expansion coefficient of the scale S. [ .

The following describes the scale crushing units 150 and 160 for crushing the scale S cooled by the operation of the cooling water circulation unit 140 and the air supply unit 130 in the internal space 114 of the discharge inducing body .

In one embodiment of the present invention, a plurality of scale crushers 150 and 160 may be provided in order to entirely crush the scale S accommodated in the discharge induction body 111. For the sake of convenience of explanation, the scale crushing units 150 and 160 arranged in a two-column structure facing the above-described first air injection hole 113a and second air injection hole 113b are described .

Hereinafter, for convenience of explanation, the scale crushing units 150 and 160 disposed to face the first air injection hole 113a are referred to as a first scale crushing unit 160, and the second air injection hole 113b, The scale crushing units 150 and 160 arranged to face the first scale crushing unit 160 will be referred to as a second scale crushing unit 160. [ However, since the first scale crushing unit 160 and the second scale crushing unit 160 are different from each other in installation position and have the same structure and operation method, the following description is limited to the first scale crushing unit 160 I will explain.

The first scale crushing unit 160 may include a crushing base 151, a motor 153, a scale crushing screw 155 and a crushing moving cylinder 157. In this embodiment,

In this embodiment, the fracture base 151 may be fixed to the outer wall of the scale discharge inducing portion 110. The crushing base 151 may be provided with a motor 153 and a crushing moving cylinder 157.

Here, one end of the fracture transfer cylinder 157 can be fixed to the fracture base 151 by being coupled with a fastening member such as a bolt 159 or the like. A motor 153 may be connected to the other end of the crushing movement cylinder 157. Here, the motor 153 can be positioned between the crushing movement cylinder 157 and the scale crushing screw 155.

In this embodiment, the scale breaking screw 155 is connected to the motor 153 at one end. The other end of the scale breaking screw 155 may be positioned in the inner space 114 of the discharge inducing body 111 through the screw penetration hole 112 of the discharge inducing body 111. The scale breaking screw 155 can be operated to crush the scale S while being rotated during operation of the motor 153. [

The scale crushing screw 155 is moved back and forth in the inner space 114 of the discharge inducing body 111 by the back and forth movement of the crushing movement cylinder 157 to cause the contact of the scale S of the scale crushing screw 155 It is possible to crush the scale S while increasing the range.

The apparatus 100 for scaling the heating furnace according to the present embodiment is provided with a scraping screw 155 for preventing the heat in the discharge inducing body 111 from being discharged to the outside of the discharge inducing body 111, A seal cover 158 for sealing the screw penetration hole 112 can be provided in the discharge induction body 111 within a range that does not affect the movement of the scale disintegration screw 155.

Hereinafter, the operation of the heating furnace scale device 100 will be described.

The apparatus 100 for scaling a heating furnace according to an embodiment of the present invention is a device for scaling a heating furnace 100 in which a high temperature material 3 (for example, a slab) heated in a heating furnace 1 is heated The scale S away from the stage 3 is accumulated on the bottom surface of the heating stand 20 and is operated to process the stacked scale S. [

First, when the accumulation position of the scale S is confirmed by opening the side door provided at the lower portion of the heating furnace 1, the scale discharge guide portion of the portion where the accumulated scale S is located among the plurality of scale discharge guide portions 110, The scale crushing units 150 and 160 of the crusher 110 are operated. At this time, the cooling water circulation unit 140 and the air supply unit 130 are preferably operated to continuously cool the scale S accumulated in the scale discharge induction unit 110.

The scale crushing screw 155 of the scale crushing units 150 and 160 crushes the scale S existing in the discharge inducing body 111 while rotating the motor 153 during the operation of the motor 153, At the same time, the scale breaking screw 155 can crush the scale S in a wider range as the crushing moving cylinder 157 is moved back and forth.

At this time, even when the scale crushing units 150 and 160 are operated, the air supply unit 130 is operated to continuously supply the low-temperature, high-pressure air to the scale S so that the scale crushing units 150 and 160 can be more easily The scale S can be crushed and the crushed scale S can be moved to the lower portion of the discharge inducing body 111 more easily.

When the operation of the scale crushing units 150 and 160 is completed by the above process, the opening and closing door 117 is operated to open the discharge inducing body 111 while the opening and closing movement cylinder 117 is operated, The scale S discharged from the discharge inducing body 111 drops down to the scale storage section 120. In this case, Then, when the discharge of the scale S from the scale discharging induction unit 110 is completed, the opening and closing door 115 is actuated to close the discharge inducing body 111 again by the operation of the opening and closing movement cylinder 117.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be clear to those who have knowledge.

100: scale processor
101a: scale discharge opening 110: scale discharge guide
111: discharge inducing body 115: opening / closing door
116: cylinder rod 117: opening / closing moving cylinder
119: Door air line 120: Scale storage part
130: air supply unit 140: cooling water circulation unit
150: first scale crushing unit 151: crushing base
153: Motor 155: Scale disintegration screw
157: crushing moving cylinder 158: sealing cover
160: Second scale crushing section

Claims (11)

A scale discharge opening provided on the bottom surface of the heating stand of the heating furnace; A scale discharge inducing portion communicating with the scale discharge opening portion to receive the scale and having an opening / closing door for discharging scale at a lower portion thereof; And a cooling unit coupled to cool the scale discharge induction unit,
The cooling unit
A cooling water circulation unit connected to supply the cooling water to the scale discharge inducing unit to cool the scale discharge inducing unit;
And an air supply unit connected to the air injection hole provided in the scale discharge induction unit to cool the scale accumulated in the scale discharge induction unit.
The cooling system according to claim 1,
A cooling water storage tank in which cooling water is stored;
A cooling water supply pipe connecting one side of the cooling line provided in the scale discharge inducing unit and the cooling water storage tank to supply cooling water to the cooling line; And
And a cooling water return pipe connecting the other side of the cooling line to the cooling water storage tank and providing the cooling water discharged from the cooling line to the cooling water storage tank.
The method according to claim 1 or 2, wherein
Further comprising at least one scale crushing unit for crushing the scale introduced into the scale discharge inducing unit.
A scale discharge opening provided on the bottom surface of the heating stand of the heating furnace; A scale discharge inducing portion communicating with the scale discharge opening portion to receive the scale and having an opening / closing door for discharging scale at a lower portion thereof; And a cooling unit coupled to cool the scale discharge induction unit,
Further comprising at least one scale crushing unit for crushing the scale introduced into the scale discharge inducing unit.
[5] The apparatus of claim 4,
Wherein the scale discharge guide portion is provided in two rows on the upper and lower sides of the scale discharge guide portion.
[5] The apparatus of claim 4,
A motor provided on a crushing base fixed to an outer wall of the scale discharge guide portion; And
And a scale breaking screw for breaking the scale while one end is connected to the motor at the outside of the scale discharge inducing portion and the other end is located inside the scale discharge inducing portion and is rotated during operation of the motor.
The method of claim 6,
Wherein the scale crushing unit further comprises a crushing moving cylinder having one end fixed to the crushing base and the other end connected to the motor to move the crushing screw back and forth.
The method according to any one of claims 1, 2, and 4 to 7,
Wherein the opening / closing door is slidably installed on a lower portion of the scale discharge guide portion by back and forth movement of an opening / closing cylinder provided at one side of the opening / closing door,
And a refractory provided on an upper surface of the opening / closing door and capable of withstanding the scale of high temperature.
The method of claim 8,
Wherein the door air line is connected to the door so as to provide the low temperature high pressure air to the door so as to cool the door in a high temperature state by the scale.
The method according to any one of claims 1, 2, and 4 to 7,
And a scale accommodating portion accommodating the scale discharged from the scale discharge guide portion when the opening and closing door is opened is further provided in the lower portion of the scale discharge guide portion.
The method according to any one of claims 1, 2, and 4 to 7,
Wherein the scale discharge guide portion has an inclined surface whose upper portion is inclined upward toward the scale discharge opening portion and whose lower portion is provided in a cylindrical structure.

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