KR102359242B1 - Iron making process simulation apparatus and method - Google Patents

Abstract

The present invention relates to a container part in which an internal space is formed to accommodate a charge, a gas injection part connected to one side of the container part to inject gas into the charge in the internal space of the container part, and the other side opposite to one side of the container part Apparatus and method for simulating a steel manufacturing process, including a gas recovery unit disposed in the As a result, an apparatus and method for simulating a steel manufacturing process capable of stable experimentation by preventing clogging of holes are provided.

Description

Iron MAKING PROCESS SIMULATION APPARATUS AND METHOD

The present invention relates to an apparatus and method for simulating an iron making process, and more particularly, to an apparatus and method for simulating a steel manufacturing process that enables stable experiments by preventing hole clogging.

The blast furnace process is a process for manufacturing molten iron by charging iron ore and coke into a blast furnace and supplying high-temperature hot air. In order to increase the efficiency of the blast furnace process, the state of the fusion zone formed inside the blast furnace must be maintained in a healthy state.

Conventionally, using a crucible prepared to simulate the blast furnace process, the ventilation resistance of the fusion zone simulated inside the crucible is measured, and the optimum process conditions for maintaining the state of the fusion zone in the blast furnace process by using the measurement result was derived.

Meanwhile, in the process of simulating the blast furnace process, gas is injected into the crucible so as to cross the fusion zone inside the crucible, and the gas is exhausted from the crucible. At this time, dust may be discharged from the crucible, and a hole formed in the crucible for gas exhaust may be blocked by the dust. In addition, the above-described gas pipe may be damaged due to thermal expansion of the crucible.

The technology underlying the present invention is disclosed in the following patent documents.

KR 10-2013-0110596 A KR 10-2012-0065117 A

The present invention provides an apparatus and method for simulating an iron making process capable of stably simulating a blast furnace process by preventing hole clogging.

An apparatus for simulating a steel manufacturing process according to an embodiment of the present invention includes: a container unit in which an internal space is formed to accommodate a charge; a gas injection part connected to one side of the container part so as to inject gas into the charge of the internal space; a gas recovery unit disposed on the other side opposite to one side of the container unit; a state detection unit connected to the gas injection unit and the gas recovery unit; and a separation/discharging part mounted to connect the container part and the gas recovery part, and having a buffer space formed therein.

The size of the buffer space in the vertical direction may be larger than the size of the inner diameter of the gas recovery unit.

At least a portion of an inner surface of the separation/discharge unit defining the buffer space may be bent so as to collide with the gas discharged from the container unit.

A plurality of discharge holes are formed to pass through the other side of the container unit, the separate discharge unit is mounted to surround the plurality of discharge holes, and the gas recovery unit can indirectly communicate with the plurality of discharge holes through the separate discharge unit. have.

The separate discharge unit may include: a housing formed to surround the other side of the container unit; and a buffer dam accommodated in the housing and facing the plurality of discharge holes.

The buffer dam may be in contact with a bottom surface of the housing and may be spaced apart from a ceiling surface of the housing.

A plurality of the buffer dams may be provided to be spaced apart from each other in a direction from the plurality of discharge holes toward the gas recovery unit.

A surface of the buffer dam facing the plurality of discharge holes may be inclined in an up-down direction.

The buffer space includes a first space extending in a vertical direction between the buffer dam and the plurality of discharge holes, a second space extending in a direction crossing the vertical direction between the buffer dam and a ceiling surface of the housing, and and a third space extending in a vertical direction between the buffer dam and the gas recovery unit, wherein the second space connects an upper portion of the first space and an upper portion of the third space, and the buffer dam includes the second space. The lower part of the first space and the lower part of the third space may be separated from each other.

The container part and the separate discharge part may include the same material.

The gas recovery unit may include: a recovery pipe extending toward the separation/discharging unit; a connection member mounted to the inlet end of the recovery pipe and disposed to pass through the separation/discharging part; and an elastic member elastically supporting the recovery pipe so that the connection member is in close contact with the separation/discharging part.

The gas recovery unit may include: a cooling case disposed to surround one side of the recovery pipe and accommodating the elastic member therein; It may include; a refrigerant supply connected to the cooling case so as to cool the elastic member.

At least a portion of the gas recovery unit in contact with the separate discharge unit may include the same material as the separate discharge unit.

At least a portion of the gas recovery part, the container part, and the separate discharge part may include a carbon material.

A plurality of injection holes may be formed to pass through one side of the container unit, a gas distribution unit may be mounted to surround the plurality of injection holes, and the gas injection unit may be connected to the plurality of injection holes through the gas distribution unit.

The method for simulating the iron making process according to an embodiment of the present invention includes a process of charging a charge into the interior of the container; applying heat and pressure to the charge; passing a gas through the charge through one side and the other side opposite to each other of the container part; a process of detecting the state of the gas before passing through the charge and the gas passing through the charge; and, after passing the gas, the gas passing through the charge is introduced into the buffer space Including the process of increasing the flow area of the gas.

The process of passing the gas may include: injecting the gas into the charge through one side of the container part; The process of discharging gas from the charge through the other side opposite to one side of the container part, including, and after passing the gas, the gas passing through the charge collides with a buffer dam inside the buffer space to separate foreign substances from the gas; The method may include a process of flooding the gas from which foreign substances are separated into the upper portion of the buffer dam and then recovering the gas from the buffer space to a recovery pipe.

The process of recovering the gas may include a process of maintaining contact between the separation and discharge part formed to define the buffer space and the recovery pipe in contact.

The process of maintaining the contact of the recovery pipe may include: elastically supporting the movement of the recovery pipe due to thermal expansion of the separation/discharging part; and cooling the elastic member so that the elastic member provided to elastically support the recovery pipe is not heated by heat.

The charge includes coke and iron ore, and the coke is charged into the container unit before the iron ore to form a lower layer, and the iron ore is charged on the lower layer to form an upper layer, and the gas is a component of a blast furnace gas Including, the state of the gas may include a differential pressure between the pressure of the gas before passing through the charge and the pressure of the gas passing through the charge.

According to the embodiment of the present invention, the gas discharged from the container unit may be passed through the buffer space of the separation/discharge unit to increase the flow area of the gas. Accordingly, foreign substances in the gas can be dropped into the buffer space, and the discharge hole between the inside of the container part and the buffer space can be prevented from being blocked by the foreign substances. In this way, it is possible to stably perform an experiment simulating the iron making process by preventing clogging of the hole, and to obtain accurate experimental results.

1 is a schematic diagram of a blast furnace facility to which an embodiment of the present invention is applied.
2 is a schematic diagram of an apparatus for simulating an iron making process according to an embodiment of the present invention.
3 and 4 are partially enlarged views of the container according to an embodiment of the present invention.
5 is a schematic diagram of a separate discharge unit according to an embodiment of the present invention.
6 is an exploded view of a gas recovery unit according to an embodiment of the present invention.
7 is a graph showing the results of a simulation experiment of a blast furnace process according to an embodiment of the present invention.
8 is a graph showing the results of a simulation experiment of a blast furnace process according to a comparative example of the present invention.

Hereinafter, with reference to the accompanying drawings, an embodiment of the present invention will be described in detail. However, the present invention is not limited to the embodiments disclosed below, and will be implemented in various different forms. Only the embodiments of the present invention are provided to complete the disclosure of the present invention, and to completely inform those of ordinary skill in the art the scope of the invention. The drawings may be exaggerated in order to explain the embodiment of the present invention, and like reference numerals in the drawings refer to the same elements.

The apparatus and method for simulating a steelmaking process according to an embodiment of the present invention may be applied to an experiment for simulating a steelmaking process. Of course, the iron making process simulating apparatus and method can be used in various ways as an experimental apparatus that processes various charges under various process conditions and derives various results.

Hereinafter, an embodiment of the present invention will be described based on an experimental apparatus for an experiment simulating a blast furnace process in an iron making process.

1 is a schematic diagram of a blast furnace facility to which an embodiment of the present invention is applied.

Referring to FIG. 1 , the blast furnace facility 10 may include a blast furnace body, a tuyere formed under the blast furnace body, and a hot air supply connected to the tuyere. The blast furnace body may include a cylindrical shell that is provided with an inlet in the upper furnace top and extends in the vertical direction, and a refractory unit constructed inside the shell. The tuyere may be radially formed in the lower portion of the blast furnace body. The hot air supply is formed in a ring shape by winding around the lower portion of the blast furnace body, and may be connected to a tuyere. In addition, the outlet may be formed so as to penetrate the lower portion of the blast furnace body from the lower side of the tuyere.

Molten iron M can be manufactured by charging blast furnace charges, such as iron ore, sinter ore, and coke, into the blast furnace body, blowing hot air through a tuyere to burn the coke, and reducing and melting iron components of the iron ore and sinter ore. In this case, the core 21 , the loading zone 22 , and the fusion zone 23 may be formed inside the blast furnace body. A mass band may be formed on the upper portion of the fusion zone 23 . The iron component of the iron ore and the sintered ore in the blast furnace charge may be reduced in the bulk zone, and the iron ore and the sintered ore in the blast furnace charge may be melted in the fusion zone 23 . In this case, the gas flow in the blast furnace body may change according to the melting progress of the iron ore and the sintered ore in the fusion zone 23 , and the process efficiency of the blast furnace process may vary.

Therefore, it is possible to evaluate the characteristics of the blast furnace charge (hereinafter, referred to as 'charging material') using the iron making process simulating apparatus of the embodiment of the present invention. Specifically, the softening point and melting point of iron ore are indirectly measured in such a way that a charge, such as iron ore and coke, is charged in an iron making process simulation device, heat and pressure are applied to simulate the internal environment of the blast furnace body, and gas is passed through the coke to measure air permeability. can be measured with In this case, the air permeability of the coke can be obtained by measuring the differential pressure between the gas injected into the coke and the gas escaping the coke. Thereafter, the characteristics of the charge may be evaluated from the measurement results. In addition, the process efficiency of the blast furnace process can be predicted using the evaluation result, and optimal process conditions for improving the efficiency of the blast furnace process can be derived.

Figure 2 is a schematic view of an apparatus for simulating a steelmaking process according to an embodiment of the present invention, Figure 3 is a partial enlarged view of a separation discharge unit according to an embodiment of the present invention, Figure 4 is a partial enlarged view of the container part according to an embodiment of the present invention It is also In addition, Figure 5 is a schematic view of a separate discharge unit according to an embodiment of the present invention, Figure 6 is an exploded view of the gas recovery unit according to an embodiment of the present invention.

Referring to FIG. 2 , the apparatus 300 for simulating the iron making process according to an embodiment of the present invention includes a container part 310 having an internal space to accommodate a charge, and charging of the internal space of the container part 310 . A gas injection unit 320 connected to one side of the vessel unit 310 to inject gas into the water, a gas recovery unit 330 disposed on the other side opposite to one side of the vessel unit 310, a gas injection unit ( 320) and the state detection unit 340 connected to the gas recovery unit 330, the container unit 310 and the gas recovery unit 330 are mounted to connect, and a buffer space S is formed therein. part 350 .

On the other hand, the iron making process simulating apparatus 300 according to an embodiment of the present invention may further include a gas distribution unit 360 , an electric furnace 370 , a heating unit 380 , and a pressurizing unit 390 .

The charge may include a blast furnace charge. For example, the charge may include coke 41 and iron ore 42 .

The container unit 310 may include a carbon material that can withstand a high temperature of 1300° C. or higher for simulating a blast furnace process. The container unit 310 may be formed in the shape of a rectangular cylindrical body. Of course, the shape of the container unit 310 may vary. A loading plate 311 may be provided at a lower portion of the container unit 310 . The loading plate 311 may be spaced apart from the bottom surface of the container unit 310 . A plurality of through-holes may be formed in the loading plate 311 . The molten material may be discharged from among the charges 41 and 42 to the bottom surface of the container unit 310 through the through hole. Here, the melt may be a melt produced by melting the iron ore 42 . When all of the iron ore 42 is melted by the high-temperature heat transferred to the container part 310 , only a layer of coke 41 may exist in the container part 310 .

For the charging of the charges 41 and 42, the container unit 310 may be formed in a separable structure in which the upper part can be opened. That is, the container unit 310 may include a main body with an open upper portion, and a lid detachable from the upper opening of the main body.

The charging materials 41 and 42 may be charged into the interior of the main body through the opening at the upper portion of the main body, and may be stacked on the upper surface of the loading plate 311 . The coke 41 may be charged to the upper surface of the loading plate 311 to form a first layer, and the iron ore 42 may be charged to the upper surface thereof to form a second layer.

The container unit 310 may receive heat from the outside to the inside. To this end, the container unit 310 may be disposed inside the electric furnace 370 . The electric furnace 370 may be, for example, a cylindrical reactor having a predetermined size so that the container part 310, the separation and discharge part 350, and the gas distribution part 360 can be accommodated therein. A heating part 380 of a hot wire type may be provided on the inner peripheral surface of the electric furnace 370 . The heating unit 380 may include, for example, a heating wire including a Kanthal material, and may heat the inside of the electric furnace 370 to a high temperature of 1300° C. or more by using the heating wire. Meanwhile, the container unit 310 may be seated on the lower surface of the electric furnace 370 . The position of the container unit 310 may be fixed by its own weight and the close contact between the gas injection unit 320 and the gas recovery unit 330 .

At this time, when the container unit 310 thermally expands or contracts by cooling, the separate discharge unit 350 may move horizontally, for example, in the left and right direction on the lower surface of the electric furnace 370 by such expansion and contraction, and the gas recovery The elastic member 333 to be described later of the part 330 may be contracted and expanded by accommodating the expansion and contraction of the container part 310 and the horizontal movement of the separation/discharging part 350 by it, whereby the gas A recovery pipe 331 , which will be described later, of the recovery part 330 may maintain close contact with the separation/discharge part 350 .

The charging materials 41 and 42 inside the container unit 310 may receive pressure from the pressurizing unit 390 . To this end, the container part 31 may be connected to the pressing part 390 . Specifically, the pressing unit 390 may include a subscription device 391 , a rod 392 , and a pad 393 . The pressurizer 391 may be disposed at a predetermined height outside the electric furnace 370 so as to be positioned above the container unit 310 . The rod 392 may have an upper end mounted on the pressurizer 391 , disposed to pass through the electric furnace 370 and the container unit 310 in the vertical direction, and a lower end disposed on the upper portion of the container unit 310 . The pad 393 may be disposed on the upper portion of the container 310 and supported on the lower end of the rod 392 . The pad 393 may be formed in a rectangular plate shape along the shape of the inner surface of the container unit 310 . The pad 393 may move downward by the rod 392 and press the upper surface of the second layer formed of the iron ore 42 .

A plurality of holes H1 and H2 may be respectively formed on one side and the other side of the container unit 310 . The plurality of holes H1 and H2 may include a plurality of discharge holes H1 and a plurality of injection holes H2 . The plurality of injection holes H2 may be formed to pass through one side of the container part 310 , and the plurality of discharge holes H1 may be formed to penetrate the other side of the container part 310 . Gas may be supplied to the interior of the container unit 310 through the plurality of injection holes H2 , and the gas may be discharged from the container unit 310 through the plurality of discharge holes H1 . The gas may be heated to a temperature of 1000° C. to 1300° C., and may contain components of the blast furnace gas. Here, the plurality of holes H1 and H2 may be located within the height of the first layer made of the coke 41 .

The gas passes through the plurality of injection holes H2 on one side of the container part 310 and flows into the container part 310 , and the coke 41 in the charges 41 and 42 inside the container part 310 . ) and may be discharged to the outside of the container part 310 through a plurality of discharge holes H1 on the other side of the container part 310 . At this time, as the plurality of discharge holes H1 are formed, even if any one of the plurality of discharge holes H1 is blocked by a foreign material 43 resulting from the charges 41 and 42, for example, dust of iron ore, The remaining holes can smoothly pass the gas. Since a plurality of injection holes H2 are provided, even if a charge is introduced into one hole and is blocked, gas may smoothly pass through the other hole.

By charging a charge inside the container part 310 to form a first layer and a second layer, applying heat and pressure and passing a gas through the charge, the internal environment of the container part 310 during the blast furnace process It is possible to simulate the internal environment of the blast furnace body, and thus, the fusion zone in the interior of the container unit 310 can be simulated.

When the internal environment of the blast furnace body is simulated inside the container unit 310, the iron ore 42 is softened and melted and flowed down into the coke 41. Accordingly, the breathability of the second layer formed of the coke 41 is improved. will change That is, the pressure of the gas before passing through the container part 310 and the pressure of the gas after escaping the container part 310 are detected to obtain the differential pressure, and when the change of the differential pressure is tracked over time, the coke 41 It can be seen that the change in air permeability of the second layer formed by

From this, the softening point and melting point of the iron ore 42 in the composition of the temperature and pressure and gas inside the container part 310 can be known, and the behavior of the melt of the iron ore 42 inside the container part 310 . can be predicted and the characteristics of the charge can be evaluated.

The gas injection unit 320 may be connected to the plurality of injection holes H2 through the gas distribution unit 360 . The gas injection unit 320 extends toward one side of the container unit 310 , and includes an injection tube 321 disposed to pass through the electric furnace 370 , and a plurality of gas supply sources 322 connected to the injection tube 321 . , the gas mixer 323 disposed between the gas supply source 322 and the injection pipe 321 , the heater 324 formed on one side of the injection pipe 321 , and the gas distribution unit 360 so as to be connected to the injection pipe It may include a nipple 325 mounted to the end of 321 .

The injection tube 321 may include, for example, a ceramic material. One side of the injection pipe 321 may be connected to the gas mixer 323 , and a nipple 325 may be mounted on the other end of the injection pipe 321 . The plurality of gas sources 322 may include a first gas reservoir 322a, a second gas reservoir 322b, a third gas reservoir 322c, and a fourth gas reservoir 322d. Each of these gas reservoirs may store the blast furnace gas for each component. For example, hydrogen gas may be stored in the first gas reservoir 322a, carbon monoxide gas may be stored in the second gas reservoir 322b, and carbon dioxide gas may be stored in the third gas reservoir 322c. and nitrogen gas may be stored in the fourth gas reservoir 322d. Of course, the type of stored gas may vary.

The plurality of gases may be mixed at a predetermined ratio in the gas mixer 323 , and may be heated to a high temperature by the heater 324 while passing through the injection pipe 321 . The mixing ratio of the gas and the heating temperature may be variously determined according to the process conditions of the blast furnace process to be simulated.

The nipple 325 may include the same material as the gas distribution unit 360 . The nipple 325 may include a carbon material. The nipple 325 may have a truncated cone shape in which the diameter is narrowed in a direction from the end of the injection tube 321 toward one side of the container unit 310 . The nipple 325 is mounted to surround the end of the injection pipe 321 , and at least a part of it may be inserted into an insertion hole formed in the gas distribution unit 360 .

2 and 6 , the gas recovery unit 330 may indirectly communicate with a plurality of discharge holes H1 formed to pass through the other side of the container unit 310 through the separate discharge unit 350 . The gas recovery unit 330 is mounted on the inlet end of the recovery pipe 331 and the recovery pipe 331 extending toward the separation/discharge unit 350 , and a connection member 336 disposed to pass through the separation/discharge unit 350 . ), the connection member 336 may include an elastic member 333 for elastically supporting the recovery pipe 331 so that the separation and discharge unit 350 is in close contact.

In addition, the gas recovery unit 330 is disposed to surround one side of the recovery pipe 331 , and the cooling case 332 , in which the elastic member 333 is accommodated, is cooled to cool the elastic member 333 . Refrigerant supplies 334 and 335 connected to the case 332 , and a plurality of sealing rings 337 sealing a gap between the recovery pipe 331 and the cooling case 332 may be included.

The recovery pipe 331 may include a plurality of pipes. For example, the recovery pipe 331 may include a first pipe 331a disposed to pass through the electric furnace 370 and a second pipe 331b extending toward the first pipe 331a. Meanwhile, at least a portion of the second pipe 331b may be formed to be stretchable, or the first pipe 331a and the second pipe 331b may be installed to be movable in the left and right directions. At this time, the first pipe (331a) and the second pipe (331b) are elastically supported by the elastic member (333) and can be pressed in a direction toward the separate discharge part (350), and at the end of the first pipe (331a) The mounted connection member 336 may be in close contact with the inner circumferential surface of the connector H3 of the separation/discharge unit 350 .

The first pipe 331a and the second pipe 331b may be connected in a left and right direction, and a flange may be formed at a connection portion of the pipe. The flange may serve as a piston head inside the cooling case 332 . That is, the flange may be in close contact with the inner surface of the cooling case 332 , and a sealing ring 337 may be disposed therebetween. Meanwhile, a sealing ring 337 may also be disposed between the outer peripheral surface of the second pipe 331b and the cooling case 332 .

One end positioned inside the electric furnace 370 among both ends of the first pipe 331a may be the inlet of the recovery pipe 331 . A connection member 336 may be mounted at the inlet of the recovery pipe 331 . In addition, the cooling case 332 may be mounted to surround the recovery pipe 331 from the outside of the electric furnace 370 , and may be in contact with the side surface of the electric furnace 370 . An elastic member 333 , for example, an elastic spring may be disposed between the inner surface of the cooling case 332 and the flange of the recovery pipe 331 . One side of the elastic member 333 may be supported on the outer circumferential surface of the cooling case 332 , and the other side may press the flange. The elastic member 333 may press the flange toward the container part 310 so that the connection member 336 may be connected to and closely contacted with the separation/discharge part 350 .

When the container part 310 expands due to the high temperature of the electric furnace 370 , the recovery pipe 331 and the connection member 336 may be pushed away from the container part 310 by the expansion of the container part 310 . can At this time, since the recovery pipe 331 is elastically supported by the elastic member 333 , the recovery pipe 331 and the connection member 336 can maintain close contact with the separated discharge unit 350 . Accordingly, damage to the recovery pipe 331 can be prevented.

A refrigerant, for example, cooling water may be supplied to the cooling case 332 so that the elastic member 333 is not damaged by heat. To this end, refrigerant supplies 334 and 335 may be connected to the cooling case 332 . The refrigerant supplies 334 and 335 may include a refrigerant discharging member 334 and a refrigerant injecting member 335 . The refrigerant injection member 335 may be connected to a refrigerant supply source (not shown). The refrigerant discharge member 334 may be connected to a refrigerant storage tank (not shown).

The connection member 336 may be disposed to pass through the gas discharge hole formed in the separation/discharge unit 350 and may be in close contact with the inner circumferential surface of the gas discharge hole. The connection member 336 may be in the shape of a truncated cone in which the outer diameter is reduced in a direction from the first pipe 331a toward the container 310 . The connection member 336 may include the same material as the separation and discharge part 350 . For example, the connecting member 336 may include a carbon material. The gas discharged from the separation and discharge unit 350 may be recovered to the recovery pipe 331 through the connection member 336 .

Meanwhile, the recovery pipe 331 may be connected to a gas pump (not shown), and the gas pump forms a negative pressure inside the recovery pipe 331 , and the gas flow from the container unit 310 to the recovery pipe 331 . can form.

The state detection unit 340 may be connected to the gas injection unit 320 and the gas recovery unit 330 . The state detector 340 may include at least one detector to detect the state of the gas. In this case, the state of the gas may include the pressure of the gas. In this case, the detector may include a pressure gauge 341 . A plurality of pressure gauges 341 are provided, and may be respectively mounted on the injection pipe 321 and the recovery pipe 331 . Also, the state detection unit 340 may include a differential pressure detector 342 to detect a differential pressure from the pressure detected by the pressure gauge 341 . The differential pressure detector 342 may be connected to the pressure gauges 341 , and may detect a differential pressure between the pressure of the gas passing through the recovery pipe 331 and the pressure of the gas passing through the injection pipe 321 . Of course, the state of the gas described above may vary. For example, when the state of the gas includes a gas component, the state detection unit 340 may further include a component analyzer (not shown) connected to the recovery pipe 331 . In addition, when the state of the gas includes the temperature of the gas, the state detection unit 340 may include a thermometer (not shown) connected to the recovery pipe 331 and the injection pipe 321 . On the other hand, by using the differential pressure detected by the differential pressure detector 342 , the softening and melting characteristics of the charge and the ventilation state of the coke 41 in the charge at this time can be checked.

2 to 5 , the separate discharge unit 350 may be mounted to surround the plurality of discharge holes H1 formed to pass through the other side of the container unit 310 . The separation/discharge unit 350 may separate the foreign material 43 in the gas discharged from the container unit 310 by dropping it from the gas, and may discharge the gas from which the foreign material 43 has been removed to the gas recovery unit 330 .

The separate discharge unit 350 may include the same material as the container unit 310 , for example, a carbon material. On the other hand, at least a portion of the gas recovery unit 330 in contact with the separation and discharge unit 350 , for example, the connection member 336 may include a carbon material that is the same material as the separation and discharge unit 350 .

A buffer space S may be formed in the separation and discharge unit 350 . The size D2 in the vertical direction of the buffer space S may be greater than the size D1 of the inner diameter of the discharge hole H1 of the container unit 310 . In addition, the size D2 of the buffer space S in the vertical direction may be larger than the size D3 of the inner diameter of the recovery pipe 331 of the gas recovery unit 330 .

Accordingly, the gas mixed with the foreign material 43 may be easily introduced into the buffer space S through the discharge hole H1. That is, before the gas passing through the layer of coke 41 passes through the relatively narrow discharge hole H1 and flows into the recovery pipe 331 having a narrow inner diameter similar to the discharge hole H1, a relatively wide buffer It may be introduced into the space (S) first.

Accordingly, since the foreign material 43 in the gas can easily escape from the inside of the relatively narrow discharge hole H1 to the inside of the relatively wide buffer space S, the foreign material 43 inside the discharge hole H1 is It is possible to prevent remaining, and it is possible to prevent clogging of the discharge hole H1. From this, the flow of the gas from the discharge hole H1 to the recovery pipe 331 through the buffer space S may be smooth.

The separate discharge unit 350 includes a housing 351 formed to surround the other side of the container unit 310 , and accommodated in the housing 351 , and a plurality of discharge holes H1 of the container unit 310 . and a buffer dam 352 disposed between the plurality of discharge holes H1 and the gas recovery unit 330 to face each other.

The buffer space S may be defined by the inner surface of the housing 351 and the outer surface of the buffer dam 352 . That is, the inner surface of the separation discharge unit 350 defining the buffer space S may include an inner surface of the housing 351 and an outer surface of the buffer dam 352 . At this time, at least a portion of the inner surface of the separation and discharge unit 350 defining the buffer space (S) to collide with the water discharged from the container unit 310 may be bent.

In detail, since the outer surface of the buffer dam 352 has a curved shape based on the bottom surface of the housing 351 , the flow distance of the gas flowing in parallel with the bottom surface of the housing 351 can be increased, and the gas By colliding with the outer surface of the buffer dam 352, the foreign material 43 in the gas may be separated by falling.

The housing 351 may have an inside that is opened toward the container part 310 and may be mounted to surround the outer surface of the other side of the container part 310 . At this time, the opening of the housing 351 facing the other side of the container part 310 may be in contact with the outer surface of the container part 310 by an adhesive. The material of the housing 351 may include the same material as that of the container unit 310 . For example, the housing 351 may include a carbon material. A connector H3 may be formed through a surface of the housing 351 facing the first pipe 331a. The connection member 336 of the gas recovery unit 330 may be connected to the connector H3 .

The buffer dam 352 may be in contact with the bottom surface of the housing 351 and may be spaced apart from the ceiling surface of the housing 351 . Also, the buffer dam 352 may be in contact with a side surface connecting the bottom surface and the ceiling surface of the housing 351 . The buffer dam 352 serves to bend the buffer space S formed inside the housing 351, collides with the gas discharged from the plurality of discharge holes H1, and drops foreign substances mixed in the gas. plays a role

The buffer space S includes a first space S1 extending in the vertical direction between the buffer dam 352 and the plurality of holes H1 and a vertical direction between the buffer dam 352 and the upper surface of the housing 351 . It may include a second space S2 extending in a direction intersecting the , and a third space S3 extending in the vertical direction between the buffer dam 352 and the gas recovery unit 330 . In this case, the second space S2 may connect the upper part of the first space S1 and the upper part of the third space S3 . Also, the buffer dam 352 may separate the lower portion of the first space S1 and the lower portion of the third space S3 from each other.

The gas overflows the buffer dam 352 , passes through the second space S2 , and flows to the third space S3 and the gas recovery unit 330 , and the foreign material 43 collides with the buffer dam 352 . Thus, the speed is reduced, and by falling down by its own weight, it can be stored in the first space (S1).

Meanwhile, in a modified example according to an embodiment of the present invention, a plurality of buffer dams 352 may be provided. In detail, a plurality of buffer dams 352 may be provided inside the housing 351 to be spaced apart from each other in a direction from the plurality of discharge holes H1 toward the gas recovery unit 330 . Accordingly, one or more separation spaces may be formed between the buffer dams 352 .

This separation space serves to increase the flow area of the gas flowing through the second space (S2). That is, the flow rate may decrease due to an increase in the flow area while the fine foreign material that may collide with the buffer dam 352 and scatter upward flows through the second space S2, and thus, the fine foreign material flows into the spaced space. and can be removed.

According to another modified example of the present invention, the surface facing the plurality of discharge holes H1 of the buffer dam 352 may be formed to be inclined in the vertical direction. Specifically, the surface facing the plurality of discharge holes H1 of the buffer dam 352 is up and down so that the buffer dam 352 and the discharge hole H1 become closer from the lower portion to the upper portion of the buffer dam 352 . It may be formed to be inclined in the direction. Accordingly, the gas and the buffer dam 352 do not collide vertically, but collide obliquely. Accordingly, the collision area between the gas and the buffer dam 352 can be increased, and the direction in which foreign substances in the gas are scattered after the collision can be adjusted toward the bottom surface of the housing 351 .

The gas distribution unit 360 may be mounted to surround the plurality of injection holes H2 formed to pass through one side of the container unit 310 . The gas distribution unit 360 may have a distribution chamber formed therein. The gas flows into the distribution chamber inside the gas distribution unit 360 through the gas injection unit 320 , and is secreted into a plurality of injection holes H2 formed on one side of the vessel unit 310 to enter the interior of the vessel unit 310 . can be injected.

The gas distribution unit 360 may be located inside the electric furnace 370 . Accordingly, before injecting the gas into the container portion 310 , the temperature of the gas can be easily raised using the temperature inside the electric furnace 370 , and thus, the heater 324 installed in the injection pipe 321 is Operation efficiency can be increased.

Hereinafter, a method for simulating the iron making process according to an embodiment of the present invention will be described.

The method for simulating the iron making process according to an embodiment of the present invention includes a process of charging the charges 41 and 42 in the interior of the container unit 310, a process of applying heat and pressure to the charges 41 and 42, and the container unit The process of passing gas through the charges 41 and 42 through the opposite side and the other side of the 310, the gas and the charges 41 and 42 before passing through the charges 41 and 42 It includes the process of detecting the state of the gas thereafter. In this case, after the process of passing the gas, the gas passing through the charges 41 and 42 may be introduced into the buffer space S to increase the flow area of the gas.

First, the charging material is charged in the interior of the container unit 310 . The charge may include coke 41 and iron ore 42 . For example, the lid of the container unit 310 is separated from the main body, and the coke 41 is charged on the loading plate 311 in the main body to form the first layer. Thereafter, iron ore is charged on the first layer to form a second layer. Then, the lead is mounted on the body. That is, the coke 41 is charged into the container 310 before the iron ore 42 to form a lower layer, for example, a first layer, and the iron ore 42 is charged on the lower layer to form an upper layer, for example, a second layer.

Thereafter, heat and pressure are applied to the charges 41 and 42 . In this case, the order of applying heat and pressure may vary. For example, by using the pressurizing unit 390 to press down the upper surfaces of the charging materials 41 and 42 inside the container unit 310, the heating unit 380 is operated to a predetermined high temperature at which the blast furnace process is performed. The container part 310 is heated.

Thereafter, the gas is passed through the charge (41, 42) through the opposite side and the other side of the container portion (310). That is, the gas may be injected into the charges 41 and 42 through the plurality of injection holes H1 formed on one side of the container unit 310 using the injection tube 321 . And, using the recovery pipe 331 , the gas is discharged from the charges 41 and 42 through the plurality of discharge holes H1 formed on the other side of the container unit 310 . In this case, the gas may include a component of the blast furnace gas.

For example, the gas passes to one side of the container unit 310 through the injection pipe 321 provided in the gas injection unit 320 and the gas distribution unit 360 connected thereto. Then, a negative pressure is formed inside the recovery pipe 331 provided in the gas recovery unit 330 and the separation/discharge unit 350 connected thereto to discharge the gas that has passed through the coke 41 in the charge from the container unit 310 . make it Through this process, the environment inside the blast furnace body during the blast furnace process can be simulated inside the container unit 310 .

At this time, the gas discharged from the container unit 310 may be introduced into the buffer space S inside the separation/discharge unit 350 and the flow area of the gas may be increased to separate foreign substances from the gas. That is, it is possible to separate the foreign material 43 from the gas by using the buffer space S to prevent clogging of the discharge hole H1. For example, the gas discharged from the container unit 310 is temporarily accommodated in the separate discharge unit 350 , and collides with the buffer dam 352 to drop foreign substances from the gas. Then, the gas from which foreign substances are removed overflows into the upper part of the buffer dam 352 , and then the gas is recovered from the buffer space S to the recovery pipe 331 .

On the other hand, the container unit 310 and the separate discharge unit 350 may be thermally expanded by the high-temperature heat applied to the charge. At this time, the recovery pipe 331 connected to the connector H3 of the separation/discharge unit 350 may be pushed away from the container unit 310 by the above-described thermal expansion. At this time, by using the elastic force of the elastic member 333 to elastically support the recovery pipe 331 toward the connector H3 , the connection between the connector H3 and the recovery pipe 331 can be maintained. For example, the contact between the separation and discharge part 350 formed to define the buffer space S and the recovery pipe 331 in contact may be maintained by using the elastic force of the elastic member 333 .

That is, the elastic member 333 may elastically support the movement of the recovery pipe 331 in a direction to retreat from the container unit 310 . Accordingly, the inner wall of the connection member 336 provided at the inlet of the recovery pipe 331 and the connector H3 of the separation/discharging unit 350 can be kept in close contact. Here, even if the connector H3 thermally expands and the diameter increases, the connecting member 336 can deeply enter the inside of the connector H3 along the inclination of the outer circumferential surface of the connecting member 336, and the connector H3 and the connecting member The close contact of 336 can be maintained. That is, by using the elastic force of the elastic member 333, the recovery pipe 331 can be brought into close contact with the separation and discharge part 350 provided to define the buffer space S, and the expansion of the container part 310 by heat and The elastic member 330 may accommodate the contraction. Meanwhile, in order to prevent the elastic member 333 from being damaged by being heated by high-temperature heat, cooling water may be circulated in the cooling case 332 in which the elastic member 333 is accommodated to cool the elastic member 333 .

While performing the above-described processes, the state of the gas before passing through the charge and the state of the gas after passing through the charge are detected. Here, the state of the gas may include a differential pressure between the pressure of the gas in the injection tube 321 and the pressure of the gas in the recovery tube 331 .

7 is a graph showing the results of a simulation experiment of a blast furnace process according to an embodiment of the present invention.

Referring to FIG. 7 , in the initial stage of the simulation experiment, the difference between the pressure of the gas in the injection tube 321 and the pressure of the gas in the recovery tube 331 is not large. When the experiment proceeds and the iron ore 42 melts and starts to flow into the coke 41 , the pressure difference between the injection pipe 321 and the recovery pipe 331 starts to increase significantly. And, when the amount of the iron ore 42 decreases as the experiment proceeds, the above-described pressure difference decreases and returns to the magnitude of the differential pressure at the initial stage of the experiment.

Looking at the time-dependent change in the differential pressure, it is possible to check the point at which the iron ore 42 melts and flows down, and from this, the softening point and the melting point of the iron ore 41 can be indirectly measured. At this time, the process conditions of the subsequent blast furnace process may be optimized by using the pressure, temperature, and gas components applied to the container unit 310 .

When the simulation experiment is finished, the supply of gas may be stopped, and coke may be removed from the inside of the container unit 310 . At this time, it is possible to remove the foreign matter accumulated in the separate discharge unit 350 .

8 is a graph showing the results of a simulation experiment of a blast furnace process according to a comparative example of the present invention.

The iron making process simulating apparatus according to the comparative example of the present invention is provided in a structure in which the separation and discharge part 350 is removed and the recovery pipe 331 is directly connected to the hole of the container part 310 . And, an experiment for simulating the blast furnace process was performed using an iron making process simulating device.

Referring to FIG. 8 , it can be seen that the results of the experiment according to the embodiment of the present invention are similar to the initial and middle periods of the experiment, but the magnitude of the differential pressure does not decrease in the late period of the experiment. Then, as a result of disassembling and confirming the apparatus for simulating the iron making process of the comparative example, it was confirmed that the hole of the container unit 310 was blocked.

If the hole is clogged during the experiment as described above, it is difficult to derive the accurate charging characteristics because it is impossible to confirm the time when the melting of the iron ore is completed.

On the other hand, referring to FIG. 7 , in the case of an experiment using the apparatus 300 for simulating the iron making process according to an embodiment of the present invention, since the hole clogging is prevented, the differential pressure can be accurately measured, and the characteristics of the charge can be accurately evaluated therefrom. .

The above embodiments of the present invention are intended to illustrate the present invention, not to limit the present invention. It should be noted that the configurations and methods disclosed in the above embodiments of the present invention may be combined and modified in various forms by combining or crossing each other, and modifications thereof may also be considered as the scope of the present invention. That is, the present invention will be embodied in various different forms within the scope of the claims and equivalent technical spirits, and those skilled in the art to which the present invention pertains can implement various embodiments within the scope of the technical spirit of the present invention. will be able to understand

300: iron making process simulation device
310: container unit
320: gas injection unit
330: gas recovery unit
350: separate discharge unit
352: buffer dam

Claims (20)

a container unit in which an inner space is formed to accommodate the charge;
a gas injection part connected to one side of the container part so as to inject gas into the charge of the internal space;
a gas recovery unit disposed on the other side opposite to one side of the container unit;
a state detection unit connected to the gas injection unit and the gas recovery unit;
and a separation and discharge part mounted to connect the container part and the gas recovery part, and having a buffer space formed therein;
A plurality of discharge holes are formed to pass through the other side of the container part,
The separate discharge unit is mounted to surround the plurality of discharge holes,
The gas recovery unit indirectly communicates with the plurality of discharge holes through the separation and discharge unit. The method according to claim 1,
The size of the buffer space in the vertical direction is larger than the size of the inner diameter of the gas recovery unit iron making process simulating apparatus. 3. The method according to claim 2,
An apparatus for simulating an iron manufacturing process in which at least a portion of an inner surface of the separation/discharge unit defining the buffer space is bent so as to collide with the gas discharged from the container unit. delete The method according to claim 1,
The separate discharge unit,
a housing formed to surround the other side of the container part;
Buffer dam accommodated in the housing and facing the plurality of discharge holes; Iron making process simulating apparatus comprising a. 6. The method of claim 5,
The buffer dam is in contact with the bottom surface of the housing, the iron making process simulating apparatus spaced apart from the ceiling surface of the housing. 7. The method of claim 6,
A plurality of buffer dams are provided to be spaced apart from each other in a direction from the plurality of discharge holes toward the gas recovery unit. 7. The method of claim 6,
A surface of the buffer dam facing the plurality of discharge holes is formed to be inclined in the vertical direction. 7. The method of claim 6,
The buffer space includes a first space extending in a vertical direction between the buffer dam and the plurality of discharge holes, a second space extending in a direction crossing the vertical direction between the buffer dam and a ceiling surface of the housing, and and a third space extending in a vertical direction between the buffer dam and the gas recovery unit,
The second space connects the upper part of the first space and the upper part of the third space,
The buffer dam is an iron making process simulating apparatus for separating the lower part of the first space and the lower part of the third space from each other. The method according to claim 1,
The apparatus for simulating the iron manufacturing process including the container part and the separated discharge part of the same material. A container portion in which an inner space is formed to accommodate the charge;
a gas injection part connected to one side of the container part so as to inject gas into the charge of the internal space;
a gas recovery unit disposed on the other side opposite to one side of the container unit;
a state detection unit connected to the gas injection unit and the gas recovery unit;
and a separation and discharge part mounted to connect the container part and the gas recovery part, and having a buffer space formed therein;
The gas recovery unit,
a recovery pipe extending toward the separation/discharging unit;
a connection member mounted on the inlet end of the recovery pipe and disposed to pass through the separation/discharging part;
An elastic member for elastically supporting the recovery pipe so that the connection member is in close contact with the separation/discharge part; 12. The method of claim 11,
The gas recovery unit,
a cooling case disposed so as to surround one side of the recovery pipe and accommodating the elastic member therein;
The iron making process simulating apparatus including a; a refrigerant supply connected to the cooling case so as to cool the elastic member. 12. The method according to claim 10 or 11,
At least a portion of the gas recovery unit in contact with the separation/discharge unit includes the same material as the separation/discharge unit. 14. The method of claim 13,
At least a portion of the gas recovery unit, and the container unit and the separation and discharge unit iron manufacturing process simulating apparatus comprising a carbon material. The method according to claim 1,
A plurality of injection holes are formed to pass through one side of the container part,
A gas distribution unit is mounted to surround the plurality of injection holes,
The gas injection unit is connected to the plurality of injection holes through the gas distribution unit iron making process simulating apparatus. The process of charging the charge to the inside of the container unit;
applying heat and pressure to the charge;
passing a gas through the charge through one side and the other side opposite to each other of the container part;
The process of detecting the state of the gas before passing through the charge and the gas passing through the charge;
After passing the gas,
increasing the flow area of the gas by introducing the gas that has passed through the charge into the buffer space;
The process of recovering the gas from the buffer space to the recovery pipe; including,
The process of recovering the gas,
The process of maintaining the contact of the collection pipe in contact with the separation and discharge part formed to define the buffer space;
The process of maintaining the contact of the recovery pipe,
elastically supporting the movement of the recovery pipe due to thermal expansion of the separation and discharge part;
and cooling the elastic member so that the elastic member provided to elastically support the recovery pipe is not heated by heat. 17. The method of claim 16,
The process of passing the gas through,
injecting gas into the charge through one side of the container;
The process of discharging gas from the charging material through the other side opposite to one side of the container part;
After passing the gas,
The process of separating the foreign material from the gas by making the gas passing through the charge collide with the buffer dam inside the buffer space;
The process of recovering the gas,
The process of simulating the iron making process, including the process of overflowing the gas from which foreign substances are separated into the upper part of the buffer dam and then recovering the gas from the buffer space to a recovery pipe. delete delete 17. The method of claim 16,
The charge comprises coke and iron ore,
Forming a lower layer by charging the coke into the container before the iron ore, and charging the iron ore on the lower layer to form an upper layer;
The gas includes a component of the blast furnace gas,
The state of the gas includes a differential pressure between the pressure of the gas before passing through the charge and the pressure of the gas passing through the charge.

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