KR102006432B1 - Experimental method for restoring ancient furnace - Google Patents

Abstract

The present invention relates to an experimental method for restoring an ancient iron making furnace, which comprises: an iron making furnace manufacturing step of manufacturing an iron making furnace which has an inner space into which an iron ore is charged, and of which an air blowing pipe is disposed at one side; an iron making preheating step of preheating the iron making furnace; an iron ore charging step of charging the iron ore into the iron making furnace; an iron making furnace heating step of heating the iron making furnace to generate iron; and an air blowing step of injecting combustion air into the iron making furnace through the air blowing pipe in at least one of the iron making furnace preheating step, the iron ore charging step, and the iron making furnace heating step. Moreover, the air blowing step is performed by using an air blower which comprises: a power unit supplying operation power; a motor-based air blowing fan operated by the power supplied from the power unit; and a control unit controlling a frequency of the power applied from the power unit to control a fan operation pattern of the air blowing fan.

Description

Experimental method for restoring an ancient steel mill {EXPERIMENTAL METHOD FOR RESTORING ANCIENT FURNACE}

The present invention relates to an ancient steel mill restoration experiment method, and more particularly, to an ancient steel mill restoration experiment method for overcoming the limitations of archaeological data and more accurately restoring ancient high-quality steelmaking techniques.

In the ancient times when the Three Kingdoms (Goguryeo, Baekje, Silla) held every corner, the production of iron was an important issue directly related to the nation's power, so each country put a lot of energy into the production of iron. It is estimated.

By the way, the ancient steel remains are mostly ground-based structures, which are the main subjects of the operation, and since the operation is over, many of them have been destroyed in the process of being destroyed and the upper part is lost and only the lower structure remains. Therefore, due to the limitation of information through the seasonal remains and the traditional steel technology cut off, our ancestors do not clearly grasp the high quality traditional steel technology.

In recent years, restoration projects at the national or regional level have been continued to more accurately restore ancient high-quality steelmaking technology.

In this regard, as a prior art related to the method for restoring the ancient steel furnace, Korean Laid-Open Patent Publication No. 10-2015-0099013 (Patent Document 1) has been disclosed.

However, the conventional ancient steel mill restoration experiment method including patent document 1 adheres to the traditional method of using a bellows (hand bellows, a foot bellows, etc.) in the ventilation system for injecting combustion air into a steelworks furnace, and costs the experiment manpower. And there is a problem that the experiment time increases.

Korean Patent Publication No. 10-2015-0099013

In solving the above-described problems, an object of the present invention is to apply a blowing method using a blowing device that controls the fan drive pattern of the blowing fan by adjusting the frequency of the applied power instead of the blowing method using a bellows (hand bellows, foot bellows, etc.) By providing an experimental method for restoring an ancient steel mill, which drastically reduces the manpower cost and the experiment time.

In addition, the object of the present invention is to reduce the labor cost and experiment time drastically to enable a large number of experiments, the ancient steel furnace restoration experiment method that presents the possibility to clearly grasp the high quality traditional steel technology of our ancestors In providing.

The method for restoring an ancient steel mill according to an embodiment of the present invention includes a steel mill manufacturing step of manufacturing a steel mill having an inner space into which iron ore is charged and a blower pipe on one side, and preheating the steel mill to preheat the steel mill. And an iron ore charging step of charging iron ore into the iron making furnace, and an iron making furnace heating step of generating iron by heating the iron making furnace, and preheating the iron making furnace, charging the iron ore, and heating the steel making furnace. In at least one of the steps further comprises a blowing step of injecting combustion air into the steelworks through the blower pipe, wherein the blowing step, the power supply for supplying drive power, and the power supplied from the power supply The fan-driven fan of the blower fan is controlled by controlling the motor-driven blower fan and the frequency of the power applied from the power supply unit. It characterized in that is carried out using the fan apparatus comprises a control unit.
At this time, the control unit is configured to control whether the blower fan On / Off, by adjusting the frequency of the power applied from the power supply when the blower fan On by rotating and rotating the blower fan alternately It is preferably configured to form a repeating pattern of the combustion air injection and the combustion air injection interruption, it is preferably configured to be adjustable step by step the RPM size of the blowing fan.
The control unit may determine whether the temperature of the steel making furnace is lower than a specific temperature value for iron production based on temperature information of a temperature sensor in connection with a temperature sensor installed in the steel making furnace, and then the temperature of the steel making furnace is a specific temperature. It is more preferably configured to control whether the blower fan is on / off by turning on the blower fan when the value is less than the value, and turning off the blower fan when the temperature of the steel making furnace is equal to or greater than a specific temperature value.
In this case, the blower is connected to the blower pipe and the blower connecting pipe, and the blower fan is configured to be connected to the blower pipe partially wrapped by a connecting reinforcing material to inject combustion air into the steel mill. desirable.
In addition, the blowing fan is preferably configured based on the three-phase motor.

The method for restoring an ancient steel mill according to an embodiment of the present invention may further include a product carrying-out step of carrying out a product generated in the steel mill heating step.

At this time, the steel manufacturing step, the excavation step of excavating the ground, the lower structure composition step of forming a lower structure using at least charcoal, sand and clay in the excavated portion, and using the clay containing herbs and sand And a furnace wall construction step of constructing the furnace wall.

Meanwhile, the preheating of the steelmaking furnace may be performed by injecting wood and charcoal into the steelmaking furnace to combust it.

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On the other hand, the iron ore charging step, it is preferable to repeatedly perform in a three-layer structure charging method of adding a charcoal to form a lower layer, the iron ore is added to form an intermediate layer, and then the input of charcoal to form an upper layer.
In this case, the iron ore charging step may be performed by further adding an additive including at least one of masato and lime powder.

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As described above, the method for restoring an ancient steel furnace according to the present invention is a blower using a blower that controls a fan driving pattern of a blower fan by adjusting a frequency of an applied power source instead of a blower method using a bellows (hand bellows, foot bellows, etc.). Applying this approach drastically reduces the labor cost and time spent on the experiment.

In addition, the method for restoring the ancient steel furnace according to the present invention greatly reduces the manpower cost and the experiment time, thereby enabling a large number of experiments, thus suggesting the possibility of clearly identifying the high level of traditional steelmaking techniques of our ancestors. .

1 is a flowchart illustrating a method for reconstructing an ancient steel mill according to an embodiment of the present invention.
FIG. 2 is a flowchart illustrating a manufacturing process of the steelmaking furnace illustrated in FIG. 1.
3 is a view for explaining the manufacturing step of the ancient smelting furnace, a kind of ancient steel mill.
4 is a view for explaining a conventional blowing technique for performing the blowing step shown in FIG.
5 is a view for explaining a blowing device used in the blowing step of the reconstruction experiment method of the ancient steelworks according to an embodiment of the present invention.

The accompanying drawings in the present invention may be shown in an exaggerated representation for the purpose of differentiation and clarity from the prior art, and the convenience of technology grasp. In addition, terms to be described later are defined in consideration of functions in the present invention, and may vary according to a user's or operator's intention or custom, and definitions of these terms should be made based on technical contents throughout this specification. will be. On the other hand, the embodiments are merely illustrative of the components set forth in the claims of the present invention, and are not intended to limit the scope of the invention, the scope of the rights should be interpreted based on the technical idea throughout the specification of the present invention. .

FIG. 1 is a flowchart illustrating a method for reconstructing an ancient steel mill according to an embodiment of the present invention, FIG. 2 is a flowchart illustrating a manufacturing process of a steel mill shown in FIG. 1, and FIG. 3 is an ancient steel mill. 4 is a view for explaining a manufacturing step of the ancient smelting furnace, a view for explaining a conventional blowing technology for performing the blowing step shown in Figure 1, Figure 5 is an embodiment of the present invention It is a figure for demonstrating the blowing apparatus used for the blowing step of the ancient steel mill restoration test method.

1 to 5, the method for restoring an ancient steel mill according to an embodiment of the present invention includes a steel mill manufacturing step (S10), a steel mill preheating step (S20), an iron ore charging step (S30), and a steel mill. It comprises a heating step (S40), and blowing step (S50). In addition, the method for restoring the ancient steel mill according to the embodiment of the present invention may be configured to further include a product carrying out step (S60).

The steel mill production step (S10) is a step of manufacturing the steel mill.

The steel mill is commonly referred to as the furnace required for iron production and iron making. Types of steel mills include roasting furnaces, smelting furnaces, smelting furnaces, danya furnaces, melting furnaces and steelmaking furnaces. The steel mill basically has an internal space into which iron ore is charged, and has a structure having a blower pipe on one side thereof.

The steel making step (S10), the excavation step (S11) for excavating the ground, the lower structure composition step (S12) for forming a lower structure using at least char, sand and clay in the excavated portion, and herbaceous and It can be configured to include a furnace wall construction step (S13) for constructing the furnace wall using the clay containing sand.

In particular, referring to the smelting furnace shown in Figure 3, the smelting furnace, by performing the excavation step (S11) to the excavated ground (1), by performing the lower structure composition step (S12) charcoal (11), After forming the clay structure 12 and the lower structure 10 in which the sand 13 is mixed and stacked, the furnace wall 20 may be formed by performing the furnace wall construction step S13.

Of course, the lower structure 10 may mix and stack the char 11, the clay 12, and the sand 13 in different ways to create a combustion environment inside the smelting furnace.

On the other hand, one side of the furnace wall 20 is provided with a discharging opening (part blocked by the discharging outlet blocking material 30) for discharging the generated iron, and the other side of the furnace wall (20) A discharge hole (part blocked by the discharge blockage block 40) may be provided to be connected to the discharge hole and flow out to an inclined sedimentary feature to extract iron and impurities in the furnace. For example, the exhaust port may be formed in the discharge port blocking material 30.

Particularly, the exhaust outlet is a mixture of acidic oxides and basic oxides as a check of the state of the steelworks inside the steelworks during the experiment for restoring the ancient steelworks according to the embodiment of the present invention, or the flowing slag Some neutral oxides are included.) In order to check the production of or to introduce external air into the steelmaking furnace or to input charcoal (fuel role) into the steelmaking furnace, Can open and close without limit.

On the other hand, the other side of the furnace wall 20, the blower tube 50 is installed. The blower tube 60 is a tube for blowing combustion air into the steelmaking furnace and may be made of bamboo, metal, earth, and the like, and may be manufactured in various forms. In this case, the blower tube 50 may have a structure wrapped with an installation reinforcing material 51 (for example, clay) in order to install more firmly on the furnace wall 20. In performing the reconstruction experiment method of the ancient steel mill according to an embodiment of the present invention, the aspect analysis of the molten state, the blockage state of the inside of the blower tube 50 is an important indicator for analyzing the experimental results.

On the other hand, the blowing pipe 50 is connected to the blowing means through the blowing connecting pipe (60). The blowing connector 60 may have a structure wrapped with a connecting reinforcement 61 (for example, clay) in order to install more firmly on the furnace wall (20). For example, in the conventional connection structure between the blowing connector 60 and the blowing means, the blowing connector is connected to the bellows 70a while being wrapped in the connecting reinforcement 61a (Fig. 4 (a)). Or the blowing connector 60b has a structure connected to the hand bellows 70 while being partially wrapped by the connecting reinforcing material 61b (see FIG. 4 (b)). Bellows 70a and 70b are blowing means for blowing combustion air into steel mills. In traditional steelmaking, bellows and hand bells have been widely used since the early method of blowing air through the pipes.

The steel mill preheating step (S20) is a step of preheating the steel mill to form a reducing atmosphere inside the steel mill. The steel mill preheating step (S20), it may be carried out in a manner to burn by inputting wood and charcoal into the steel mill. For example, the steel mill preheating step (S20), it may be carried out by injecting wood and charcoal to the open upper side of the furnace wall 20 of the smelting furnace.

More preferably, the steel mill preheating step (S20), the same as the temperature range (for example, 1200 ℃ to 1400 ℃ in the case of the smelting furnace restoration experiment) maintained in the steel mill heating step (S40) to be described later. It is preferably carried out until forming the internal temperature of the steelworks.

The iron ore charging step (S30) is a step of charging the iron ore into the steel mill.

In this case, the iron ore charging step (S30), by inputting the charcoal to form a lower layer, after the iron ore to form an intermediate layer, it may be repeatedly carried out in a three-layer structure charging method to input the charcoal to form the top layer. At this time, by putting iron ore (raw material layer) between the two charcoal layer (fuel layer), while adjusting the descending speed of the iron ore to the lower part of the steelmaking furnace to increase the heating efficiency.

At this time, the iron ore charging step (S30), it may be carried out by further adding an additive containing at least one of masato and lime powder.

On the other hand, in the method of restoring the ancient steel mill according to an embodiment of the present invention, it is also to be carried out within the equivalent scope of the present invention to perform the experiment in a manner using iron iron or earth iron, not iron ore.

The steelmaking furnace heating step (S40) is a step of generating iron by heating the steelworks.

In this case, the steel mill heating step (S40) is performed continuously in sufficient heating in the steel mill preheating step (S20) and the iron ore charging step (S30), but after a predetermined time after the charging of iron ore is heated Means to do.

The steelmaking furnace heating step (S40) may be performed by injecting char into the steelmaking furnace to combust it.

The blowing step (S50), the inside of the steelworks through the blow pipe in at least one of the preheating step (S20), the iron ore charging step (S30), and the steelworks heating step 40 of the steelworks. Injecting combustion air into the furnace. As shown in FIG. 1, the blowing step S50 is performed between the preheating furnace preheating step S20 and the iron ore charging step S30, or the iron ore charging step S30 and the steelmaking furnace heating. Of course, this may be performed between the steps 40.

The blowing step (S50) is estimated to have been the most important step for producing high-quality reduced iron in ancient steelmaking technology.

As described above, the blowing step (S50), conventionally, the blowing connector is connected to the bellows (70a) while being wrapped in the connecting reinforcing material (61a) (see Fig. 4 (a)) or the blowing connector ( 60b) is carried out by blowing combustion air into the steelmaking furnace by bellows 70a and 70b using a structure connected to the bellows 70 while partially wrapped by the connecting reinforcement 61b (see FIG. 4 (b)). It became. This conventional method not only has a problem that the results vary depending on the mastery of the workforce, but also has a limitation in performing a large number of experiments due to the increase in manpower cost. (In ancient times, it was estimated that the blowing stage was based on a considerable workforce.)

On the other hand, in order to have the same effect as a skilled bellows, a sudden blow interruption, that is, injection blockage of injection air, must be performed at the stage before the next bellows after one bellows according to the bellows characteristics. Therefore, the inventors of the present application devised another blower to simply turn on / off the blower fan periodically, but there is a problem in that the blower fan does not implement the stopping of the blower because the blower fan rotates according to inertia even when the power supply is stopped.

In order to solve this problem, the blowing step (S50), the power supply unit 71 for supplying the driving power, the motor-based blower fan 72 driven by the power supplied from the power supply unit 71, and the It is characterized in that it is performed by using a blower 70 including a control unit 73 for controlling the fan drive pattern of the blower fan by adjusting the frequency of the power applied from the power supply unit 71.

In particular, the control unit 73 controls the frequency of the power applied from the power supply unit 71 when the blowing fan 72 is driven to rotate and stop the blowing fan 72 alternately to rotate combustion air. It is preferably configured to form a repeating pattern of injection and combustion air injection interruptions. In this case, the blowing fan 72 is preferably configured based on a three-phase motor to be suitable for the control of the controller 73. Through this configuration, it is possible to realize the characteristics of the bellows which causes rapid blowdown, that is, injection blockage of injection air, at the stage before the next bellows after one bellows.

In addition, the control unit 73 is connected to a temperature sensor installed in a plurality of places in order to evaluate the experimental conditions based on the temperature information of the temperature sensor temperature of the steel furnace is a specific temperature value for iron production (in this case, specific The temperature value may be a specific temperature range value.) After determining whether the temperature is lower than a specific temperature value, turn on the blower fan and turn off the blower fan when the temperature of the steel maker is higher than a specific temperature value. In order to further control whether the blowing fan 72 On / Off. In this case, the control unit 73 will fully implement the characteristics of the bellows by simultaneously implementing the existing bellows shim operation (when a sufficient amount of air injection is made when the manpower is taken).

Furthermore, the control unit 73 may be configured to adjust the size of the RPM of the blowing fan 72 step by step according to the user's intention. In this case, the control unit 73 will be able to more fully implement the characteristics of the bellows by being able to input the RPM step matching the type of bellows (single foot bellows, multi-person foot bellows, single hand bellows, multi-hand bellows). .

On the other hand, the blower 70 is, as shown in Figure 5, the blowing fan 72 is connected to the blowing connection pipe 60c partly wrapped by the connecting reinforcing material (61b) to the combustion air in the steel mill It may be configured to inject.

The product discharging step (S60) is a step of discharging the product generated in the steelmaking furnace heating step.

For example, the product discharging step (S60) may be performed by removing the discharging outlet blocking material 30 and then discharging the product inside the steel mill through the discharging opening.

After the product carrying out step (S60), whether or not the production of reduced iron through the analysis of the product and its components are made.

As described above, the method for restoring the ancient steel furnace according to the present invention is a blower using a blower that controls the fan driving pattern of the blower fan by controlling the frequency of the applied power instead of the blower method using the bellows (hand bellows, foot bellows, etc.). By adopting the method, we can dramatically reduce the labor cost and the experiment time, thus enabling more experiments, suggesting the possibility of clarifying the high level of traditional steelmaking techniques of our ancestors.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, and various modifications and equivalent other embodiments are possible based on common knowledge in the art. Should understand. Therefore, the true technical protection scope of the present invention by the claims to be described below, should be determined based on the specific content of the invention described above.

The present invention relates to an ancient steel mill restoration experiment method, and can be used in the industrial field related to the study of ancient steelmaking technology.

S10: Steelmaking Stage
S20: Steel Preheating Step
S30: Iron Ore Loading Step S31: Excavation Step
S32: substructure forming step S33: furnace wall construction step
S40: steel furnace heating stage
S50: blowing step
S60: Product Export Step
1: floor
10: substructure 11: char
12: clay 13: sand
20: furnace wall
30: outlet blockage
40: Exhaust Block
50: blower pipe 51: installation reinforcement material
60, 60b, 60c: Blowing connector 61, 61a, 61b, 61c: Connection reinforcement
70a: bellows 70b: hand bellows
70: blower 71: power supply
72: blowing fan 73: control unit

Claims (8)

An iron making furnace having an internal space into which iron ore is charged and manufacturing an iron making furnace having an air duct on one side;
A preheating step of the steel mill to preheat the steel mill;
An iron ore charging step of charging iron ore into the steelworks; And
A steel mill heating step of generating iron by heating the steel mill;
Including,
A blowing step of injecting combustion air into the steelmaking furnace through the blower pipe in at least one of the preheating furnace, the iron ore charging step, and the steelmaking furnace heating step;
More,
The blowing step,
A blower including a power supply unit for supplying driving power, a motor-based blower fan driven by the power supplied from the power supply unit, and a control unit controlling a fan driving pattern of the blower fan by adjusting a frequency of power applied from the power supply unit Characterized in that performed using a device,
The control unit,
Combustion air injection and combustion air is configured to control whether the blower fan On / Off, by controlling the frequency of the power applied from the power supply when the blower fan On driving by rotating and rotating the blower fan alternately It is configured to form a repeating pattern of the interruption injection, characterized in that configured to be adjustable in stages RPM size of the blowing fan,
The control unit,
After determining whether the temperature of the steel making furnace is lower than a specific temperature value for iron production based on temperature information of the temperature sensor in connection with the temperature sensor installed in the steel making furnace, and if the temperature of the steel making furnace is lower than a specific temperature value, the air blowing It is characterized in that it is configured to control whether the blowing fan On / Off by turning on the fan and turning off the blowing fan when the temperature of the steelmaking furnace is above a certain temperature value,
The blower,
It is connected via the blower pipe and the blower pipe, the blower fan is connected to the blower pipe partially wrapped by a connecting reinforcing material is configured to inject combustion air into the steel mill,
The blowing fan,
Ancient steel mill restoration experiment method characterized in that the three-phase motor base.
The method of claim 1,
A product discharging step of discharging the product generated in the steelmaking furnace heating step;
Ancient steel furnace restoration experiment method characterized in that it further comprises.
According to claim 1, The manufacturing process of the steelmaking,
An excavation step of digging the ground;
A substructure forming step of forming a substructure using at least char, sand and clay in the excavated portion; And
A furnace wall construction step of constructing a furnace wall using clay including herbal and sand;
Ancient steel furnace restoration experiment method comprising a.
The method of claim 1, wherein the pre-heating step of the steelworks,
Experimental method for restoring the ancient steel mill, characterized in that carried out by the method of burning wood and charcoal into the steelmaking furnace.
The method of claim 1, wherein the iron ore charging step,
The method of restoring an ancient steel mill, characterized in that the charcoal is added to form a lower layer, iron ore is added to form an intermediate layer, and then the charcoal is added to the three-layer structure charging method to form an upper layer.
According to claim 5, The iron ore charging step,
The method of restoring an ancient steel mill, characterized in that it is carried out by further adding an additive containing at least one of masato and lime powder.
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