WO2020032470A1 - Slag treatment facility and slag treatment method - Google Patents

Abstract

A slag treatment facility according to an embodiment of the present invention comprises a slag treatment apparatus comprising a nozzle part capable of spraying a cooling gas at molten slag, wherein the nozzle part comprises: a first nozzle having, at the lower part thereof, a discharge hole through which molten slag is discharged; and a second nozzle which is mounted on the first nozzle so as to be positioned outside the first nozzle and which comprises a spray channel through which the cooling gas is sprayed in the falling direction of the molten slag to be discharged from the discharge hole. Therefore, the slag treatment facility according to an embodiment of the present invention rapidly cools slag, and thus can inhibit or prevent free calcium oxide (CaO) precipitate generation caused by slow cooling. Thus, when atomized slag is recycled, expansion caused by a hydration reaction can be inhibited or prevented.

Description

Slag treatment equipment and slag treatment method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slag treatment plant and to a slag treatment plant and a slag treatment method capable of rapidly cooling the slag.

In the blast furnace, molten slag is produced during molten iron production and refining to remove impurities in the molten iron, and the molten slag has a heat of 1500 ° C.

The molten slag is transported to the yard and after being sprinkled and cooled to be pulverized and used as raw materials for sintering or other auxiliary raw materials, or as cement raw materials, landfill agents, or dephosphorization agents.

On the other hand, since the molten slag is made of oxide, it is difficult to recover the retained heat or sensible heat that the molten slag has. In more detail, the energy consumed for melting the slag during the entire steelmaking operation is 10 to 15%, the input energy is not recovered, there is an inefficient problem in terms of energy efficiency.

Here, the sensible heat refers to the amount of heat to be used for waste heat as the amount of heat retained when the heated substance has no change in state.

When the molten slag is slowly cooled, CaO contained in a large amount in the slag is precipitated as free calcium oxide. And when the slag containing the free calcium oxide (Free CaO) precipitate is used as a cement raw material, landfill, etc., it causes a crack due to volume expansion by the hydration reaction.

In addition, there is the seasonal operation, a large amount of CO ₂ gas is generated, CO ₂ gas is a major material causing the global warming. Accordingly, there is a need to reform the CO ₂ gas into other substances that are not harmful to the environment.

(Prior art document)

Korean Registered Patent KR1285786

The present invention provides a slag treatment facility and a slag treatment method capable of quickly recovering the heat of slag so that no defect occurs during slag recycling.

The present invention provides a slag treatment facility and a slag treatment method capable of reforming gas generated during steelmaking operations using heat recovered from slag.

The slag processing apparatus according to the embodiment of the present invention includes a slag processing apparatus having a nozzle unit capable of injecting cooling gas into the molten slag, wherein the nozzle unit is provided with a first nozzle having a discharge port through which the molten slag is discharged. ; And a second nozzle mounted to the first nozzle to be positioned outside the first nozzle and provided with an injection passage for injecting the cooling gas in a falling direction of the molten slag discharged from the discharge port.

The first nozzle includes a first body having an accommodation space formed therein that is capable of accommodating the molten slag and extends in a vertical direction, and the discharge port is provided at a lower end of the accommodation space so as to communicate with the accommodation space. The second nozzle is installed to be connected to the first body, and includes a second body having a passage corresponding to the discharge port, wherein the injection passage is cooled in a moving direction of the molten slag discharged to pass through the passage. It is provided inside the second body to inject gas.

The first nozzle extends downwardly from the first body and includes an extension member provided therein with an extension flow passage communicating with the discharge port of the first body.

The second body is connected to a lower portion of the first body, the passage is formed in a hollow shape formed in the lower side of the discharge port so as to communicate with the discharge port, the injection port is the end of the injection flow path is the injection port is injected The passage is formed or exposed to face downward.

The injection flow path may include a first flow path extending in the width direction of the second body; And a second flow passage extending from the first flow passage in a direction in which the passage is located, wherein the second flow passage is inclined downward to get closer to the passage toward the injection hole.

The first flow path has a constant internal diameter.

The first flow path is inclined upward in the direction in which the second flow path is located.

The first flow path has a shape in which an inner diameter thereof narrows toward the direction in which the second flow path is located.

The second body is formed to extend in the extending direction of the first body is installed to surround the outer surface of the first body, the lower end is formed to extend to protrude to the lower side of the discharge port, the injection flow path is the injection An end of the flow path is formed extending in the up and down direction inside the second body such that an injection hole through which cooling gas is injected is positioned below the discharge hole, and the passage is formed on an inner wall surface of the second body extending below the discharge hole. It is an area partitioned by.

At least a region located below the discharge port of the injection flow path is inclined so as to be closer to the passage toward the injection port.

An area adjacent to the injection hole of the injection flow passage has a shape in which the inner diameter becomes narrower and wider toward the direction in which the injection hole is located.

And heating means connected to the first body to heat the molten slag received in the accommodation space.

And vibrating means connected to the first body to vibrate the molten slag accommodated in the accommodation space.

The slag processing apparatus includes a container having an inner space in which at least a lower portion of the nozzle portion can be accommodated.

It is possible to receive the granulated slag provided from the slag treatment apparatus, and further comprising a reaction apparatus for reacting the process gas and the reaction gas using the heat discharged from the granulated slag to reform the process gas.

And a distribution plate installed inside the reaction apparatus, extending in the width direction of the reaction apparatus, spaced apart from each other in the width direction, and having a plurality of holes through which the process gas and the reaction gas can pass.

A product gas discharge line connected to the reaction device for discharging a product gas generated by a reaction between the process gas and the reaction gas in the reaction device; And a first heat exchanger installed on an extension path of the product gas discharge line to generate steam using heat of the product gas.

A product gas discharge line connected to the reaction device for discharging a product gas generated by a reaction between the process gas and the reaction gas in the reaction device; A second heat exchanger disposed on an extension path of the product gas discharge line to heat-exchange the process gas and the reaction gas with the product gas, thereby raising the process gas and the reaction gas; And a product gas supply line extending to connect the product gas discharge line and the second heat exchanger to supply the product gas to the second heat exchanger.

Slag treatment method according to an embodiment of the present invention comprises the steps of discharging the molten slag; Spraying a cooling gas in a direction in which the discharged molten slag falls, thereby cooling the molten slag and granulating it into particles; And reforming the process gas by reacting the process gas with the reaction gas using heat released from the granulated slag.

The cooling gas includes at least one of air, an inert gas, the processing gas, and the reaction gas.

By the cooling gas injected toward the molten slag, the molten slag is cooled, granulated, and sprayed the processing gas and the reactive gas toward the granulated slag, thereby utilizing the heat of the granulated slag. The process gas is reformed.

The cooling gas includes the processing gas and the reactive gas, and cools and granulates the molten slag by the cooling gas injected toward the molten slag, together with the cooling and granulation of the molten slag. The treatment gas is reformed with cooling gas.

The cooling gas includes the processing gas and the reactive gas, and cools and granulates the molten slag by the cooling gas injected toward the molten slag, together with the cooling and granulation of the molten slag. A first reforming reaction of reforming the process gas with a cooling gas occurs, and a granular slag used in the first reforming reaction is injected into the voyage process gas and the reactant gas to perform a second reforming reaction of reforming the process gas. Conduct.

And heat-generating the generated gas generated by the reaction between the process gas and the reaction gas to generate steam.

Heat-exchanging the generated gas generated by the reaction between the process gas and the reactant gas, and the process gas and the reactant gas to raise the process gas and the reactant gas, and in reforming the process gas, The heated process gas and reactant gas are sprayed towards the granulated slag.

In cooling the molten slag, it is brought to a temperature of 600 ° C to 1100 ° C.

The processing gas includes a gas generated in the steelmaking operation.

The processing gas includes a CO ₂ containing gas and the reaction gas includes a CH ₄ containing gas.

According to the slag treatment equipment according to the embodiments of the present invention, the molten slag is discharged downward through the first nozzle, and the cooling gas is injected toward the molten slag discharged through the second nozzle. Accordingly, the molten slag in the liquid state discharged from the first nozzle is granulated in the form of particulates in a solid state close to a spherical shape while being quenched and pulverized by the injected cooling gas. For this reason, as the slag is quenched, it is possible to suppress or prevent the generation of free CaO precipitates due to slow cooling. Therefore, it is possible to suppress or prevent expansion due to the hydration reaction at the time of recycling the atomized slag.

And, according to embodiments, cooling gas is injected at the local site or near the molten slag toward the molten slag. Accordingly, the consumption of cooling gas can be reduced, and scattering of slag can be suppressed or prevented.

In addition, the heat of the slag is recovered and used as a heat source for the reforming reaction of the processing gas. Thus, the energy used for melting the slag can be recovered or recycled, thereby improving the energy efficiency in the entire steelmaking operation.

1 conceptually illustrates a slag treatment facility according to a first embodiment of the present invention

2 is a view showing a nozzle unit according to a first embodiment of the present invention.

3 is an enlarged view of a part of a nozzle unit according to a first modification of the first embodiment;

4 shows a nozzle unit according to a second modification of the first embodiment;

FIG. 5 shows a reaction device according to a third modification of the first embodiment

6 is a conceptual block diagram illustrating a slag treatment facility and a slag treatment process according to the first embodiment of the present invention.

7 conceptually illustrates a slag treatment facility according to a second embodiment of the present invention.

8 conceptually illustrates a slag treatment facility according to a third embodiment of the present invention.

9 is a conceptual block diagram illustrating a slag treatment facility and a slag treatment process according to a third embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you. In the drawings, like reference numerals refer to like elements.

The present invention relates to a slag treatment facility and a slag treatment method in which heat is easily recovered from slag. More specifically, the present invention provides a slag treatment facility and a slag treatment method capable of quickly recovering the heat of slag so that no defect occurs during recycling. In addition, the present invention provides a slag treatment facility and a slag treatment method capable of converting or reforming a gas generated during the steelmaking operation to another material using the heat of the slag.

1 is a view conceptually showing a slag treatment facility according to a first embodiment of the present invention. 2 is a view showing a nozzle unit according to a first embodiment of the present invention.

Hereinafter, in describing the slag treatment facility and the slag treatment method according to the embodiments of the present invention, a gas to be converted or reformed into another material using heat of the slag is called a treatment gas, and the treatment gas is converted or The gas which reacts with the said process gas for reforming is called reaction gas.

1 and 2, in the slag treatment equipment according to the first embodiment of the present invention, the molten slag MS discharged from the discharge port 1213 and the discharge port 1213 from which the molten slag MS is discharged or falls or falls. Slag processing apparatus 1000 provided with a nozzle portion 1200 having a flow path (hereinafter, the injection flow path (1222)) for injecting the gas for cooling and granulation (hereinafter, the cooling gas (CG)) in the moving direction, And a reaction apparatus 5100 for converting or reforming the gas generated in the steelmaking operation, that is, the processing gas into another material, by using the heat of the slag provided from the slag processing apparatus 1000.

In addition, the slag treatment facility is connected to the nozzle unit 1200, the slag supply line 2000 for supplying the molten slag (MS) to the nozzle unit 1200, the nozzle unit 1200 is connected to the nozzle unit 1200 It includes a cooling gas supply line 3000 for supplying the furnace cooling gas (CG).

In addition, the slag transfer line 4000 is installed to connect the slag processing apparatus 1000 and the reaction apparatus 5100 to transfer the granulated slag GS discharged from the slag processing apparatus 1000 to the reaction apparatus 5100. ), A gas generated by a reaction between the process gas and the reaction gas in the process gas supply line 6000 for supplying the process gas and the reaction gas to the reaction apparatus 5100 and the reaction apparatus 5100 (hereinafter, referred to as a product gas) And a product gas discharge line 7000 that discharges or transfers to the outside.

In addition, the first gas exchanger may include a first heat exchanger 8000a installed on an extension path of the product gas discharge line 7000 to generate heat by heat-exchanging the product gas.

The slag to be treated in the slag treatment facility according to the embodiment is produced or generated during the steelmaking operation, is in a liquid state, and has heat at a temperature of 1500 ° C to 1600 ° C. More specifically, the molten slag MS to be treated in the slag treatment facility includes at least one of slag produced during the refining operation in the blast furnace and slag produced during the refining operation of the converter molten iron.

The processing gas may be a CO ₂ containing gas generated in the steelmaking operation, and the reaction gas may be a gas containing CH ₄ , for example, at least one of Liquid Natural Gas (LNG) and COKE OVEN GAS (COG).

On the other hand, since molten slag MS consists of an oxide, thermal conductivity is low. In addition, when molten slag MS is slowly cooled, there is a problem that calcium oxide (CaO) contained in a large amount of slag is precipitated as free calcium oxide (Free CaO).

Therefore, the slag processing apparatus 1000 according to the embodiment cools the molten slag MS so as to suppress or prevent the precipitation of free CaO due to slow cooling of the molten slag MS. In addition, in order to improve the thermal conductivity of the slag or to use the heat of the slag as a heat source for reforming the processing gas, the slag processing apparatus 1000 granulates the molten slag MS in the form of a plurality of particles.

Granulating the molten slag (MS) means to atomize or powder into a plurality of particle forms. When molten slag MS is granulated in this way, surface area becomes large and heat dissipation becomes easier.

The slag processing apparatus 1000 according to the embodiment is positioned separately from the discharge port 1213 and the discharge port 1213 through which the molten slag MS is discharged, and the molten slag MS discharged from the discharge port 1213 falls or moves. And a nozzle unit 1200 having an injection passage 1222 for injecting cooling gas CG in a direction to be obtained.

In addition, the slag processing apparatus 1000 includes at least the nozzle part 1200 so that the molten slag MS and the cooling gas CG discharged from the nozzle part 1200 and the granulated slag GS may be accommodated. It includes a container (1100) having an inner space that can be accommodated in the lower portion.

1 and 2, the nozzle unit 1200 extends in one direction and includes an inner space (hereinafter, the accommodation space 1212) and an accommodation space through which the molten slag MS can be accommodated and moved. A first flow path 1213 provided with a discharge port 1213 for discharging the molten slag MS moved from the 1212 and an injection flow path for injecting cooling gas CG in a direction in which the molten slag MS is discharged and flowed ( 1222 and a second nozzle 1220 positioned outside the first nozzle 1210.

In addition, the nozzle unit 1200 may include heating means 1230 and vibration means (not shown) for preventing a blockage of the first nozzle 1210 and a rise in viscosity of the molten slag MS accommodated in the first nozzle 1210. It may include at least one of).

The first nozzle 1210 includes a first body 1211 extending in one direction, more specifically, in an up and down direction, and the first body 1211 is preferably made of refractory material. In addition, the first body 1211 extends in the extending direction of the first body 1211, and extends so as to communicate with a lower end of the accommodation space 1212 and the accommodation space 1212 through which molten slag is accommodated or passed. The discharge port 1213 which is formed and discharges molten slag MS to the outside is provided.

In addition, the first body 1211 is provided with an inlet 1217 connected to the accommodation space 1212 so as to be positioned higher than the discharge hole 1213 and supplying molten slag MS to the accommodation space 1212. Inlet 1217 is connected to slag supply line 2000.

As described above, the accommodation space 1212 is a passage for temporarily storing the molten slag MS or moving to the discharge port 1213 and extending in the vertical direction. The lower region adjacent to the discharge port 1213 of the accommodation space 1212 may have a shape in which the inner diameter thereof gradually decreases toward the direction in which the discharge hole 1213 is located. This is for the molten slag MS to be easily moved to the discharge port 1213.

The discharge port 1213 is a means for discharging the molten slag MS moved from the accommodation space 1212 to the outside, and is preferably formed such that its inner diameter is smaller than that of the accommodation space 1212. The discharge port 1213 may be installed to be positioned at the center of the width direction of the accommodation space 1212.

In addition, as shown in FIG. 2, the discharge port 1213 has a shape in which the inner diameter becomes narrower and wider toward the lower side from the accommodation space 1212. This is to discharge the molten slag MS at a higher speed by using the Venturi effect.

As described above, since the first nozzle 1210 extends in the vertical direction and the molten slag MS is introduced at a position higher than the discharge port 1213, the molten slag MS moves downward by gravity. Is discharged through the discharge port 1213.

As shown in FIG. 2, the heating means 1230 is a power source for generating heat of the heating element 1231 and the heating element 1231 embedded in the first body 1211, which partitions the accommodation space of the first nozzle 1210. It may include a power source 1232 for applying. According to the heating means 1230, the heating element 1231 in the first body 1211 is heated by a power source applied from the power supply unit 1232, whereby the molten slag MS accommodated in the accommodation space 1212 is heated. . Accordingly, it is possible to prevent the viscosity of the molten slag MS due to the temperature drop of the molten slag MS and the blockage of the discharge port 1213 due to this, and the molten slag MS is easily moved to the discharge port 1213. Can be discharged.

The heating means 1230 is not limited to the above-described configuration of the heating element 1231 and the power supply 1232, and means including various means such as a burner (not shown) capable of heating the molten slag in the first nozzle 1210. Can be. The burner may be installed to communicate with the accommodation space of the first nozzle 1210, and may burn-react the fuel gas and air, and heat the molten slag by this heat.

Vibration means (not shown) includes a vibration member embedded in the first body 1211 partitioning the receiving space 1212 of the first nozzle 1210 and the energy or signal for vibration of the vibration member. . Here, the vibration generator may be any one of an ultrasonic generator and a microwave generator.

When the vibration means as described above is operated, the molten slag MS in the first nozzle 1210 is vibrated or flows, thereby preventing the clogging of the discharge port due to the molten slag.

The second nozzle 1220 includes an injection passage 1222 for injecting cooling gas CG in a direction in which the molten slag MS discharged from the first nozzle 1210 falls or moves. Here, the cooling gas CG may be a gas including at least one of an inert gas such as air, nitrogen, and CO ₂ and CH ₄ . The cooling gas CG is at a lower temperature than the molten slag MS, and may be, for example, room temperature.

1 and 2, the second nozzle 1220 includes a body positioned below the first nozzle 1210 (hereinafter referred to as a second body 1221), and an outlet 1213 of the first nozzle 1210. And the molten slag MS discharged to pass through the passage 1224 and the passage 1224 provided in the second body 1221 so as to pass through the molten slag MS discharged from the first nozzle 1210. An injection flow path 1222 provided inside the second body 1221 so that the cooling gas CG is injected in the direction.

The second body 1221 is positioned below the first nozzle 1210 and passes through the passage 1224 which is a space through which the molten slag MS discharged from the discharge port 1213 of the first nozzle 1210 can pass. Branches may be hollow shaped. Accordingly, the second body 1221 is disposed to surround the stream of molten slag MS discharged from the first nozzle 1210.

The passage 1224 has a shape in which the upper side and the lower side are opened. In addition, the passage 1224 may have a shape in which an inner diameter thereof gradually increases toward the lower side as shown in FIG. 2. Of course, the shape of the passage 1224 is not limited thereto and may be a shape having no change in the inner diameter in the vertical direction.

The injection passage 1222 is a means for injecting the cooling gas CG in the falling or moving direction of the discharged molten slag MS, and is provided in the second body 1221 and communicates with the passage 1224. Form. Here, one of both ends of the injection passage 1222, one end in the extension direction is an inlet through which the cooling gas CG flows, and the other end is an injection port 1222b-1 through which the cooling gas is injected.

For convenience of description, one end of the injection passage 1222 is named the inlet and the other end of the injection opening 1222b-1, but the inlet and the injection hole 1222b-1 are integrally formed with both ends of the injection passage 1222. Configuration.

The injection hole 1222b-1 may be exposed to face the passage 1224 or the passage 1224. That is, as shown in FIG. 2, it is formed to be exposed to the corner portion between the inner surface and the lower surface of the second body 1221, which is the peripheral wall of the passage 1224, or to the lower surface of the second body 1221. It may be formed to be exposed. In this case, the cooling gas CG is injected downward of the second body 1221, and the cooling gas CG and the molten slag MS meet at the lower side of the second body 1221 and the molten slag MS. Is cooled and granulated.

The position of the injection hole 1222b-1 is not limited to the above-described example, and may be formed so as to be exposed to the inner surface of the second body 1221 which defines the passage 1224 or is a peripheral wall of the passage 1224. In this case, a cooling gas is injected into the passage 1224 of the second body 1221, and the cooling gas CG and the molten slag MS meet and cool within the passage 1224.

The injection passage 1222 may have a shape inclined downward as the region adjacent to the injection hole 1222b-1 approaches the passage 1224 toward the direction in which the injection hole 1222b-1 is located. In addition, at least an area adjacent to the injection hole 1222b-1 of the injection passage 1222 may have a shape in which the inner diameter thereof becomes narrower and wider toward the direction in which the injection hole 1222b-1 is located.

More specifically, the injection passage 1222 includes a first passage 1222a extending in the width direction or the horizontal direction of the second body 1221 and a second passage 1222b extending from the first passage 1222a. .

The first flow path 1222a is formed to extend in the width direction of the second body 1221 without changing the inclination, and has a constant internal diameter. The second flow path 1222b may be inclined downward so as to be closer to the passage toward the direction in which the injection hole 1222b-1 is located, and may have a shape in which the inner diameter gradually decreases. This is to inject the cooling gas to a high pressure by using the Venturi effect.

One end of both ends in the extending direction of the first flow path 1222a is connected to the cooling gas supply line 3000, and an inlet port through which the cooling gas CG flows into the inside, and the other end is an opening communicating with the second flow path 1222b. to be. One end of both ends in the extending direction of the second flow path 1222b is an opening communicating with the other end of the first flow path 1222a, and the other end is an injection hole 1222b through which the cooling gas CG is injected toward the passage 1224. -1). In this case, the area of the second flow path 1222b adjacent to the injection hole 1222b-1 may have a shape in which the inner diameter thereof becomes narrower and wider toward the direction in which the injection hole 1222b-1 is located.

The inclination angle of the injection passage 1222 or the second passage 1222b may be injected in a direction in which the cooling gas injected from the injection hole 1222b-1 drops the molten slag MS discharged from the first nozzle 1210. Is adjusted so that.

In the above-described example, the first flow passage 1222a is formed horizontally in the width direction of the second body 1221 without changing the inclination, and the internal diameter is constant. However, the first flow passage 1222a may be formed to be inclined downward toward the second flow passage 1222b, and may have a shape in which an inner diameter thereof becomes narrower toward the second flow passage 1222b.

The injection passage 1222 as described above may be formed to extend in the circumferential direction of the discharge port 1213. That is, the injection passage 1222 may be provided in the form of a ring surrounding the discharge hole 1213. As another example, a plurality of injection passages 1222 may be provided to be arranged in the circumferential direction of the discharge port 1213.

In addition, at least a portion of the cooling gas supplied to the second nozzle 1220 to cool the molten slag may be supplied to a hot blast furnace of the blast furnace to be used in manufacturing hot air.

The container 1100 has an interior space for allowing the entire nozzle portion 1200 to be accommodated therein. In other words, the nozzle unit 1200 is installed so that the whole thereof is located inside the container 1100. In addition, the length of the container 1100 in the vertical direction is longer than that of the nozzle part 1200, and the space below the nozzle part 1200 is collected or stored by the granulated slag GS in the container 1100. As a space to be provided, an outlet through which granulated slag GS is discharged may be provided at a lower end thereof.

At this time, the lower region of the nozzle portion 1200 of the inner space of the container 1100 is preferably a shape that the inner diameter is narrowed toward the discharge port provided at the lower end. This is to allow the granulated slag GS to move and discharge in the direction of the outlet.

In the above, the length of the container 1100 in the vertical direction is longer than that of the nozzle part 1200, and thus, the entire nozzle part 1200 is accommodated in the container 1100.

However, the present invention is not limited thereto, and the container 1100 may include the molten slag MS and the cooling gas CG discharged from the nozzle unit 1200, and the nozzle unit 1200 to accommodate the granulated slag GS. A portion of) may be provided to a size that can be accommodated.

As described above, according to the slag processing apparatus 1000 according to the exemplary embodiment of the present invention, the molten slag MS is discharged downward through the first nozzle 1210 and the molten discharged using the second nozzle 1220. Cooling gas CG is injected in the direction in which slag MS falls. Accordingly, the molten slag MS in the liquid state discharged from the first nozzle 1210 is granulated in the form of particulates in a solid state close to a spherical shape while being quenched and pulverized by the cooling gas CG injected.

At this time, in order to prevent the precipitation of calcium oxide (CaO) in the slag as free calcium oxide (Free CaO), the temperature of the atomized or granulated slag (GS) is 1100 ℃ or less, more specifically 600 ℃ or more, 1100 It should be below or below ℃. More preferably, it is 1000 to 1100 degreeC. In addition, the particle size of the granulated slag GS is preferably 5 mm or less. The temperature and particle diameter of the granulated slag as described above can be controlled by adjusting the type and cooling flow rate of the cooling gas (CG).

Thus, in the embodiment, by cooling the cooling gas (CG) to the molten slag (MS) by quenching to 1100 ℃ or less, it is possible to suppress or prevent the formation of free calcium oxide (Free CaO) precipitates. Therefore, when recycling the granulated slag GS, it is possible to suppress or prevent expansion due to the hydration reaction.

And, according to the slag processing apparatus 1000 according to the embodiment, the cooling gas CG in the direction in which the molten slag MS discharged from the first nozzle 1210 falls or flows using the second nozzle 1220. Spray it. That is, the cooling gas CG is not sprayed from the lower side to the upper side of the molten slag MS that falls, or radially or widely sprayed to the peripheral region of the molten slag MS that falls, in the falling direction of the molten slag MS. Cooling gas (CG) is sprayed and sprayed locally or intensively. Accordingly, the consumption amount of the cooling gas CG for granulating the molten slag MS can be reduced, and scattering of slag can be prevented.

In addition, in the embodiment, the heat of the slag is used to convert the CO ₂ containing gas generated in the steelmaking operation, that is, the processing gas into another material. In other words, the heat of slag is recovered and used as a heat source for the reforming reaction of the processing gas.

This requires easy recovery of heat from the slag. In embodiments, the molten slag with low thermal conductivity is granulated to increase the surface area, thereby facilitating heat release from the slag.

It is effective that the particle diameter of the slag is 5 mm or less, because the larger the particle diameter of the slag increases the temperature deviation between the surface and the center of the particle, thereby lowering the thermal conductivity.

And in cooling the molten slag MS in the slag processing apparatus 1000, it is made so that the temperature of the granulated slag GS may be 600 degreeC or more and 1100 degrees C or less as mentioned above. Here, the temperature of 1100 ° C. or less is to prevent precipitation of free calcium oxide (free CaO) as described above, and the temperature of 600 ° C. or more is to ensure easy reactivity between the processing gas and the reaction gas. That is, a temperature of 600 ° C. or higher is required for easy reaction of CO _{2 in the} processing gas and CH ₄ in the reaction gas. More preferably, the reaction rate of CO _{2 in the} processing gas and CH _{4 in} the reaction gas is greatly improved when the temperature is 1000 ° C. or higher, so that the temperature of the slag GS granulated in the slag processing apparatus 1000 is 1000 ° C. to 1100 ° C. It is desirable to adjust as possible. This can be controlled by adjusting the type and cooling flow rate of the cooling gas (CG).

The reactor 5100 is a device for converting or reforming a process gas, that is, a CO ₂ -containing gas generated in an iron making operation, to another material. In an embodiment, the reactor 5 is used by using the heat of slag provided from the slag treatment device 1000. 5100) to form a reaction temperature of CO ₂ .

The reaction apparatus 5100 according to the embodiment may have a cylindrical shape having an internal space in which the granulated slag GS is accommodated. The reactor 5100 is connected to the process gas supply line 6000 and the product gas discharge line 7000, respectively.

The processing gas is a gas generated in the steelmaking operation and is a gas containing CO ₂ . The reaction gas may be, for example, at least one of LNG (Liquid Natural Gas) and COG (COKE OVEN GAS) as a gas containing CH ₄ .

When the slag GS granulated into the reactor 5100 is charged, the temperature inside the reactor 5100 is heated to a temperature at which CO ₂ and CH ₄ can react by the heat discharged from the slag. That is, heat of the granulated slag GS is discharged into the reaction apparatus. In this case, the temperature inside the reaction apparatus 5100 may be 600 ° C to 1100 ° C, preferably 1000 ° C to 1100 ° C, due to the granulated slag GS. Then, when the CO ₂ -containing gas, which is a processing gas, and the CH ₄ -containing gas, which is a reaction gas, are supplied into the reaction apparatus 5100, the CO ₂ and the H ₂ are converted or reformed by an endothermic reaction as in Scheme 1.

Scheme 1) CO ₂ + CH ₄ = 2CO + 2H ₂ (Methane Dry Reforming)

As described above, the reaction apparatus 5100 is loaded with slag for providing a heat source for reforming the processing gas, and the processing gas and the reaction gas are supplied thereto. At this time, in order to improve the reaction efficiency of the processing gas and the reaction gas, it is advantageous to increase the residence time of the processing gas and the reaction gas inside the reaction apparatus 5100.

Therefore, in order to accommodate the granulated slag GS in the reaction apparatus 5100, in other words, it is accommodated in the form of a packed bed so that the granulated slag GS may not flow. In other words, the reactor 5100 may be a packed bed type.

Thus, when the reaction apparatus 5100 is a packed bed type, since the supplied processing gas and the reaction gas must be moved to pass between the plurality of slag particles, the path is complicated and long, so that the processing gas and the reaction gas are The reaction time and reaction rate of the liver can be improved.

Granulated slag (GS) used as a heat source for reforming CO ₂ in the reactor 5100 is discharged from the reactor 5100. And it is used as a raw material for sintering or other auxiliary raw materials, or recycled as a cement raw material, landfill, dephosphorization agent.

The product gas generated in the reactor 5100 may be discharged through the product gas discharge line 7000.

However, the present invention is not limited thereto, and the product gas may be supplied to the first heat exchanger 8000a through the product gas discharge line 7000 to be used to generate steam.

The shape or configuration of the nozzle unit 1200 described above is not limited to the first embodiment illustrated in FIGS. 1 and 2, and may be variously changed.

Hereinafter, the nozzle unit according to the modifications of the first embodiment will be described.

3 is an enlarged view of a part of a nozzle unit according to a first modification of the first embodiment.

For example, as in the first modification of the first embodiment shown in FIG. 3, the first nozzle 1210 may further include an extension member 1214 connected to the lower portion of the first body 1211. That is, the first nozzle 1210 according to the first modification includes a first body 1211 and an extension member 1214 extending downward from the first body 1211.

Inside the first body 1211 is formed extending downward from the receiving space 1212 and the receiving space 1212 to which the molten slag (MS) is moved, the discharge opening smaller than the receiving space 1212 (hereinafter, The first discharge port 1213 is provided. In this case, the first discharge hole 1213 is a means for discharging the molten slag MS into the extension member 1214, and may have a shape in which an inner diameter thereof gradually decreases toward the direction in which the extension member 1214 is positioned.

An extension flow passage 1215 extending downward is formed in the extension member 1214 so as to communicate with the first discharge port 1213. That is, one end of the extension flow path 1215 communicates with the first discharge port 1213, and the other end is an discharge port (hereinafter referred to as a second discharge port 1215-1) through which the molten slag MS is finally discharged.

The extending length of the extending member 1214 in the vertical direction is shorter than that of the first body 1211, and may be the same as or similar to the vertical length of the second nozzle 1220 described later.

The extension passage 1215 may have a shape in which the inner diameter of the extension channel 1215 is narrowed toward the lower side from the first discharge port 1213, and the inner diameter of the extension passage 1215 is widened toward the lower side thereof. At this time, the length of the region where the inner diameter widens further toward the lower side may be shorter than the length of the region where the inner diameter narrows toward the lower side from the first discharge port 1213 which is the upper region.

In the second nozzle 1220 according to the first embodiment described above, the first flow path 1222a is formed horizontally in the width direction of the second body 1221, and there is no change in the inner diameter, and the second flow path 1222b is The injection hole 1222b-1 is inclined downward so as to be closer to the passage toward the direction in which it is located. However, the present invention is not limited thereto, and both the first flow passage 1222a and the second flow passage 1222b may be provided such that the inclination and the inner diameter are variable.

That is, like the first modification of the first embodiment shown in FIG. 3, the injection passage 1222 has a first passage having an inclined upward direction in the direction in which the injection opening 1222b-1 is located from the inlet through which the cooling gas is introduced. And a second flow path 1222b inclined downward from the direction 1222a and the first flow path 1222a in the direction in which the injection hole 1222b-1 is positioned.

At this time, the upper wall of the peripheral wall of the first flow passage 1222a does not have an inclination or a height change in the second body 1221, and the lower wall is inclined upward in the direction in which the second flow passage 1222b is positioned. Can be. Due to the inclination of the lower wall, the first flow passage 1222a becomes inclined upward while the inner diameter thereof becomes narrower toward the direction in which the second flow passage 1222b is located. In addition, when the lower wall is inclined upward in the direction of the second flow path 1222b, the lower wall may have a convex curved surface or curvature in the upper wall direction.

Of course, the lower wall among the peripheral walls of the first flow passage 1222a may have a shape that does not have an inclination or a height change, and the upper wall may have a shape inclined downward in the direction in which the second flow passage 1222b is positioned.

As described above, the second flow path 1222b may be inclined downward in the direction in which the injection hole 1222b-1 is positioned, and may have a shape in which an inner diameter thereof becomes narrower as it approaches the injection hole 1222b-1. In this case, the area of the second flow path 1222b adjacent to the injection hole 1222b-1 may have a shape in which the inner diameter thereof becomes narrower and wider toward the direction in which the injection hole 1222b-1 is located.

4 is a view showing a nozzle unit according to a second modification of the first embodiment.

The nozzle unit 1200 according to the first embodiment and the first modification described above has been described that the second nozzle 1220 is located under the first nozzle 1210.

However, the nozzle unit 1200 is not limited to the above-described examples, and may be changed into various forms capable of injecting the cooling gas CG toward the molten slag MS discharged and flowing downward.

For example, as in the second modification of the first embodiment illustrated in FIG. 4, the first body 1211 of the first nozzle 1210 extends in the vertical direction, and the vertical direction is formed in the first body 1211. An accommodation space 1212 is formed to extend.

The second body 1221 of the second nozzle 1220 extends in the extending direction of the first body 1211 and is installed to surround the outer surface of the first body 1211. The second body 1221 is extended so that the lower end thereof protrudes further downwardly than the first body 1211. At this time, the inside of the protruding region is an empty space, which is located below the discharge port 1213, and is a passage 1224 through which the molten slag from which the empty space is discharged passes.

At least one region protruding downward of the first body 1211 of the second body 1221 extends closer to the widthwise center of the discharge port 1213 toward the lower side. Thus, the passage 1224 provided below the discharge port 1213 has a shape in which the inner diameter thereof becomes narrower toward the lower side.

Since the injection passage 1222 is formed to extend in the extending direction of the second body 1221 as described above, the region extending downward of the first body 1211 of the injection passage 1222 is discharged 1213 toward the lower side. The shape is closer to the center of the width direction.

More specifically, the injection passage 1222 is downward from the first passage 1222a so as to protrude downwardly from the first passage 1222a and the first body 1211 extending upwardly in the second body 1221. An extended second flow path 1222b is included. Here, the second flow path 1222b is extended to be closer to the center of the width direction of the discharge port 1213 toward the lower side.

The region adjacent to the injection hole 1222b-1 of the second flow path 1222b may have a shape in which the inner diameter thereof becomes narrower and wider toward the direction in which the injection hole 1222b-1 is located.

5 is a view showing a reaction device according to a third modification of the first embodiment.

In the above, it was described that the slag granulated in the reaction device 5100 is accommodated in a packed bed type.

However, the present invention is not limited thereto, and the reactor 5100 may be changed to a flow path type.

That is, as in the third modification of the first embodiment shown in FIG. 5, a dispersion plate 5200 is formed in the reaction apparatus 5100 extending in the width direction of the reaction apparatus and having a plurality of holes, and dispersed therein. The slag GS granulated above the plate 5200 is placed so as to be positioned, and a processing gas and a reaction gas are supplied below the dispersion plate 5200. In this case, the processing gas and the reaction gas supplied from the lower side of the dispersion plate 5200 go up through the plurality of holes, and the slag on the upper side of the dispersion plate flows by the processing gas and the reaction gas.

By applying the reactor type reactor 5100, it is possible to prevent the hot slag from being partially fused to the inner wall of the reactor.

Hereinafter, with reference to FIGS. 1, 2 and 6, the operation of the slag treatment equipment and the slag treatment method according to the first embodiment of the present invention will be described.

6 is a diagram conceptually showing a slag treatment facility and a slag treatment process according to the first embodiment of the present invention.

First, the molten slag MS generated during the steelmaking operation is prepared, and the molten slag MS is supplied to the slag supply line 2000. The molten slag MS supplied to the slag supply line 2000 is supplied to the accommodation space of the first nozzle 1210 of the slag processing apparatus 1000 and then discharged to the outside through the discharge port 1213. At this time, the molten slag MS is discharged to pass through the passage 1224 of the second body 1221 corresponding to the lower side of the discharge port 1213.

When the molten slag MS is discharged through the discharge port 1213 of the first nozzle 1210, a cooling gas CG, for example, air is sprayed toward the discharged molten slag MS, thereby melting the slag. (MS) is quenched and granulated. That is, when the cooling gas CG is supplied to the cooling gas supply line 3000, the cooling gas CG is moved along the injection passage 1222 of the second nozzle 1220, and then toward the molten slag MS. Sprayed.

In this way, the molten slag is quenched by the cooling gas injected through the second nozzle 1220 and granulated into a plurality of particles. At this time, at least one of the flow rate and the injection pressure of the cooling gas CG is adjusted so that the granulated slag has a temperature of 600 ° C to 1100 ° C, more preferably 1000 ° C to 1100 ° C.

The granulated slag GS is dropped downward in the container 1100 and then transferred to the reaction apparatus 5100. At this time, since the granulated slag GS is 600 degreeC-1100 degreeC, the temperature inside the reaction apparatus 5100 raises with slag. When the granulated slag GS is charged, a processing gas, which is a gas containing CO ₂ , and a reaction gas, which is a gas containing CH ₄ , are supplied into the reaction apparatus 5100.

At this time, since the temperature inside the reaction apparatus 5100 is 600 ° C to 1100 ° C by the heat of the granulated slag, CO ₂ of the processing gas supplied into the reaction apparatus 5100 and CH ₄ of the reaction gas are mutually reacted. CO and H ₂ are produced (Scheme 1). That is, the reforming reaction of the CO ₂ -containing gas occurs inside the reaction apparatus 5100, where the heat released from the slag is used.

The product gas including CO and H ₂ generated in the reactor 5100 is discharged to the outside through the product gas discharge line 7000.

After the completion of the CO ₂ reforming, the slag discharged from the reaction apparatus 5100 is utilized as a raw material for sintering or other auxiliary raw materials, or recycled as a cement raw material, a landfill agent, a dephosphorizing agent, or the like.

As described above, according to the slag treatment facility according to the embodiment, the cooling gas CG is injected into the molten slag MS to granulate the molten slag while rapidly quenching the molten slag. Accordingly, it is possible to suppress or prevent the generation of free CaO precipitates.

In addition, as the cooling gas CG is injected along the direction in which the molten slag falls, the consumption amount of the cooling gas CG can be reduced, and scattering of the slag can be suppressed or prevented.

In addition, by recovering the heat of the slag and using it as a heat source for the reforming reaction of the processing gas, there is an effect of improving energy efficiency in the entire steelmaking operation.

7 is a view conceptually showing a slag treatment facility according to a second embodiment of the present invention.

In the above-described first embodiment, the product gas discharged from the reaction device 5100 is discharged as it is, or is supplied to the first heat exchanger 8000a to be used to generate steam.

However, the present invention is not limited thereto, and the generated gas discharged from the reaction device 5100 may be used to raise the temperature of the processing gas and the reaction gas supplied to the reaction device 5100.

That is, the slag treatment plant according to the second embodiment, as shown in Figure 7, the heat exchanger for raising the temperature of these gases by heat-exchanging the generated gas discharged from the reaction device 5100 with the processing gas and the reaction gas (hereinafter referred to as And a product heat recovery line 9000 connecting the second heat exchanger 8000b and the product gas discharge line 7000 and the second heat exchanger 8000b to supply the product gas to the second heat exchanger 8000b. Include.

Accordingly, the generated gas discharged from the reaction device 5100 may be recycled to raise the process gas and the reaction gas to be supplied to the reaction device 5100 without being discharged as it is.

8 is a view conceptually showing a slag treatment facility according to a third embodiment of the present invention.

The slag treatment facility according to the first and second embodiments described above includes a slag treatment device 1000 and a reaction device 5100. That is, the granulated slag GS provided in the slag processing apparatus 1000 was sent to the reaction apparatus 5100, and the process gas was reformed using the sensible heat of slag in the reaction apparatus 5100. FIG. In other words, the apparatus for granulating the slag and the apparatus for reforming the processing gas are separate apparatuses.

However, when using the CO ₂ containing gas and the CH ₄ containing gas as the cooling gas CG supplied to the slag processing apparatus 1000, the reaction apparatus 5100 may be omitted, as in the third embodiment shown in FIG. 8. Can be. That is, in the slag processing apparatus 1000, granulation of molten slag and modification of process gas can be performed. In other words, the slag is granulated and the reforming of the processing gas is performed in the same apparatus.

Hereinafter, the slag treatment facility according to the third embodiment of the present invention will be described in more detail with reference to FIG. 8. At this time, the content overlapping with the above-described first and second embodiments will be omitted or briefly described.

The slag processing facility includes a nozzle portion having a discharge port 1213 through which molten slag MS is discharged and an injection flow path 1222 separated from the discharge port 1213 and injecting cooling gas in a direction in which the discharged molten slag falls. And a slag processing apparatus 1000 provided with 1200.

The slag processing equipment is generated in the slag supply line 2000 for supplying the molten slag MS to the nozzle unit 1200, the cooling gas supply line 3000 for supplying the cooling gas CG, and the slag processing apparatus 1000. A product gas discharge line 7000 for discharging the gas.

In addition, a second heat exchanger 8000b, a product gas discharge line 7000, and a second heat exchanger 8000b for heating the cooling gas CG to be supplied to the slag treatment 1000 by using the product gas discharged from the slag processing apparatus 1000. 2 is provided to connect the heat exchanger (800b), the product gas recovery line 9000 for supplying the product gas to the second heat exchanger (8000b) and the process gas for supplying the processing gas and the reaction gas to the second heat exchanger (8000b) It may include a supply line 6000.

The slag supply line 2000 is installed to be connected to the accommodation space of the first nozzle 1210 and supplies molten slag MS to the accommodation space 1212.

The cooling gas supply line 3000 is connected to the injection passage 1222 of the second nozzle 1220 to supply the cooling gas to the injection passage 1222. At this time, the cooling gas CG supplied to the second nozzle 1220 includes a CO ₂ containing gas and a CH ₄ containing gas. The CO ₂ -containing gas may be a gas by-produced in the steelmaking operation, and the CH ₄ -containing gas may include at least one of Liquid Natural Gas (LNG) and COKE OVEN GAS (COG).

9 is a diagram conceptually showing a slag treatment facility and a slag treatment process according to a third embodiment of the present invention.

8 and 9, the operation of the slag treatment facility and the slag treatment method according to the third embodiment of the present invention will be described. At this time, the description of the operation of the slag treatment facility and the slag treatment method according to the first and second embodiments will be omitted or briefly described.

First, molten slag MS generated during the steelmaking operation is prepared and supplied to the accommodation space 1212 of the first nozzle 1210 through the slag supply line 2000. The molten slag MS supplied to the accommodation space of the first nozzle 1210 moves downward by gravity and is discharged to the outside through the discharge port 1213, and the discharged molten slag MS is discharged to the second body 1221. Fall through the passage 1224.

When the molten slag is discharged through the discharge port 1213 of the first nozzle 1210, the cooling gas CG is injected toward the molten slag MS discharged to quench and granulate the molten slag MS. Let's do it. At this time, the granulated slag (GS) has a temperature of 600 ° C to 1100 ° C, more preferably 1000 ° C to 1100 ° C. As the molten slag MS is quenched by the cooling gas CG in this way, precipitation of free CaO can be suppressed or prevented.

Meanwhile, as described above, the cooling gas CG injected into the molten slag MS through the second nozzle 1220 includes a CO ₂ containing gas, which is a processing gas to be reformed, and a CH ₄ containing gas, which is a reactive gas. And since the temperature of the slag is more than 600 ℃, the inner vessel 1100 of the slag treatment unit (1000) is the composition at a temperature which facilitates the reaction between CO ₂ and CH _4.

Accordingly, CO ₂ and CH ₄ in the cooling gas CG injected through the second nozzle 1220 are reformed by heat released from the slag, and CO and H ₂ are generated by the reaction (Scheme 1).

In this case, the product gas may be supplied to the second heat exchanger 8000b through the product gas discharge line 7000, and the second nozzle 1220 may be exchanged with the product gas in the second heat exchanger 8000b. The cooling gas to be supplied, that is, the CO ₂ containing gas and the CH ₄ containing gas, can be heated. To this end, a process gas supply line 6000 and a product gas recovery line 9000 may be connected to the second heat exchanger 8000b.

In the second heat exchanger 8000b, the cooling gas CG including the CO ₂ containing gas and the CH ₄ containing gas is heated and supplied to the second nozzle 1220 to supply the cooling gas supplied toward the molten slag MS. This is to facilitate the reaction between CO ₂ and CH ₄ in (CG).

That is, when the cooling gas supplied for granulating the molten slag is lower than the temperature of the molten slag, the molten slag can be cooled. However, in this case, when the processing gas and the reaction gas are heated in advance using the product gas, the reaction between the processing gas and the reaction gas in the slag processing apparatus may be easier.

Thus, when the cooling gas is heated and supplied from the second heat exchanger 8000b, the cooling gas supplied to the slag processing apparatus 1000 may be more easily reached at a temperature for the reaction between CO ₂ and CH ₄ .

Of course, the cooling gas supplied to the slag treatment apparatus 1000 may reach a temperature for the reaction between CO ₂ and CH ₄ due to the heat of the molten slag, so that the second heat exchanger 8000b may be omitted.

As described above, in the third embodiment, the molten slag may be quenched to be easily recycled in the slag treatment apparatus 1000, and the CO ₂ containing gas generated in the steelmaking operation may be reformed without the reaction apparatus 5100. That is, the slag treatment plant according to the third embodiment has the advantage that the arrangement of the facility is simple compared to the first embodiment and the second embodiment.

In addition, in the case of supplying the cooling gas CG including the processing gas and the reaction gas, the reaction apparatus is not omitted as in the above-described third embodiment, and the reaction apparatus 5000 as in the first embodiment shown in FIG. 1. ) May be provided.

In this case, the slag processing apparatus 1000 and the reaction apparatus 5100 may recover the heat of the slag to reform the processing gas. That is, the first reforming reaction may occur in the slag treatment apparatus 1000, and the second reforming reaction may occur using the heat released from the granulated slag used for the first reforming reaction in the reaction apparatus 5100. Thus, there is an effect that the heat recovery of the slag is further improved.

The above-described embodiments and modifications are not limited to the above-described examples, and the embodiments and modifications may be configured to be combined with each other.

According to the slag processing apparatus 1000 of the slag processing equipment according to the embodiments of the present invention, the molten slag MS is discharged downward through the first nozzle 1210, and discharged using the second nozzle 1220. Cooling gas is injected in the direction of falling molten slag. Accordingly, the molten slag MS in the liquid state discharged from the first nozzle 1210 is granulated in the form of particulates in a solid state close to a spherical shape while being quenched and pulverized by the cooling gas CG injected. Therefore, as the slag is quenched to 1100 ° C. or less, it is possible to suppress or prevent the generation of free CaO precipitates due to slow cooling. Therefore, it is possible to suppress or prevent expansion due to the hydration reaction at the time of recycling the atomized slag.

Then, the cooling gas is not sprayed radially through the nozzle unit 1200 according to the embodiments, but is sprayed at a local portion or in a position close to the molten slag toward the molten slag MS that is discharged and flows. Accordingly, the consumption of cooling gas can be reduced, and scattering of slag can be suppressed or prevented.

In addition, the heat of the slag is recovered and used as a heat source for the reforming reaction of the processing gas. Thus, the energy used for melting the slag can be recovered or recycled, thereby improving the energy efficiency in the entire steelmaking operation.

According to the slag treatment equipment according to the embodiments of the present invention, the molten slag is discharged downward through the first nozzle, and the cooling gas is injected toward the molten slag discharged through the second nozzle. Accordingly, the molten slag in the liquid state discharged from the first nozzle is granulated in the form of particulates in a solid state close to a spherical shape while being quenched and pulverized by the injected cooling gas. For this reason, as the slag is quenched, it is possible to suppress or prevent the generation of free CaO precipitates due to slow cooling. Therefore, it is possible to suppress or prevent expansion due to the hydration reaction at the time of recycling the atomized slag.

Claims (28)

1. A slag processing apparatus having a nozzle portion capable of injecting cooling gas into the molten slag,

   The nozzle unit,

   A first nozzle having a discharge port through which the molten slag is discharged; And

   A second nozzle mounted to the first nozzle so as to be located outside the first nozzle and provided with an injection passage for injecting the cooling gas in a falling direction of the molten slag discharged from the discharge port;

   Slag treatment equipment comprising a.
2. The method according to claim 1,

   The first nozzle may include a first body having an accommodation space formed therein and capable of receiving the molten slag and extending in a vertical direction.

   The discharge port is provided at the lower end of the accommodation space to communicate with the accommodation space,

   The second nozzle is installed to be connected to the first body, and includes a second body provided with a passage corresponding to the discharge port,

   And the injection passage is provided inside the second body such that a cooling gas is injected in a moving direction of the molten slag discharged to pass through the passage.
3. The method according to claim 2,

   And the first nozzle extends downwardly from the first body and includes an extension member provided therein with an extension flow passage communicating with the discharge port of the first body.
4. The method according to claim 2,

   The second body is connected to the lower portion of the first body, the passage is formed in a hollow shape formed below the discharge port so as to communicate with the discharge port,

   The slag treatment facility of the end of the said injection flow path and formed so that the injection hole which the cooling gas is injected may face to the said passage or the said passage lower side.
5. The method according to claim 4,

   The injection passage,

   A first flow path extending in the width direction of the second body; And

   A second flow passage extending from the first flow passage in a direction in which the passage is located;

   Including;

   And the second flow path is inclined downward so as to be closer to the passage toward the injection hole.
6. The method according to claim 5,

   The said 1st flow path is a slag processing facility with a constant internal diameter.
7. The method according to claim 5,

   And said first flow path is inclined upwardly in the direction in which said second flow path is located.
8. The method according to claim 7,

   And the first flow passage has a shape in which an inner diameter thereof narrows toward the direction in which the second flow passage is located.
9. The method according to claim 2,

   The second body is formed to extend in the extending direction of the first body is installed to surround the outer surface of the first body, the lower end is formed to extend to protrude to the lower side of the discharge port,

   The injection passage is an end of the injection passage and is formed to extend in the up and down direction inside the second body so that the injection hole in which the cooling gas is injected is located below the discharge hole,

   And said passage is a region partitioned by an inner wall surface of said second body extending below said discharge port.
10. The method according to claim 9,

    At least a region located below the discharge port of the injection flow path is inclined so as to be closer to the passage toward the injection port.
11. The method according to any one of claims 4 to 10,

    The area of the injection passage adjacent to the injection port is a slag treatment equipment having a shape that narrows the inner diameter toward the direction in which the injection port is located and then widens again.
12. The method according to claim 2,

    And heating means connected to the first body to heat the molten slag contained in the receiving space.
13. The method according to claim 2,

    And a vibrating means connected to the first body to vibrate the molten slag contained in the accommodation space.
14. The method according to claim 2,

    The slag processing apparatus includes a container having an inner space in which at least a lower portion of the nozzle portion can be accommodated.
15. The method according to any one of claims 1 to 10,

    The slag treatment which can accommodate the granulated slag provided from the said slag processing apparatus, and reacts a process gas and a reaction gas using the heat | emission from the granulated slag, and reforms the process gas further. equipment.
16. The method according to claim 15,

    Slag treatment equipment installed in the reaction apparatus, the slag treatment equipment including a dispersion plate extending in the width direction of the reaction apparatus, spaced apart from each other in the width direction and having a plurality of holes through which the process gas and the reaction gas can pass. .
17. The method according to claim 15,

    A product gas discharge line connected to the reaction device for discharging a product gas generated by a reaction between the process gas and the reaction gas in the reaction device;

    A first heat exchanger installed on an extension path of the product gas discharge line to generate steam by using heat of the product gas;

    Slag treatment actual cost including.
18. The method according to claim 15,

    A product gas discharge line connected to the reaction device for discharging a product gas generated by a reaction between the process gas and the reaction gas in the reaction device;

    A second heat exchanger disposed on an extension path of the product gas discharge line to heat-exchange the process gas and the reaction gas with the product gas, thereby raising the process gas and the reaction gas; And

    A product gas supply line extending to connect the product gas discharge line with the second heat exchanger and supplying a product gas to the second heat exchanger;

    Slag treatment equipment comprising a.
19. Discharging molten slag;

    Spraying a cooling gas in a direction in which the discharged molten slag falls, thereby cooling the molten slag and granulating it into particles;

    Reforming the process gas by reacting the process gas with the reaction gas using heat released from the granulated slag;

    Slag treatment method comprising a.
20. The method according to claim 19,

    And the cooling gas comprises at least one of air, an inert gas, the processing gas, and the reactive gas.
21. The method of claim 20,

    The molten slag is cooled and granulated by the cooling gas injected toward the molten slag,

    And treating the processing gas and the reaction gas toward granulated slag to reform the processing gas using the heat of the granulated slag.
22. The method according to claim 19,

    The cooling gas includes the processing gas and the reaction gas,

    The slag processing method of cooling and granulating the said molten slag by the said cooling gas injected toward the said molten slag, and reforming the said processing gas with the said cooling gas with cooling and granulation of the said molten slag.
23. The method according to claim 19,

    The cooling gas includes the processing gas and the reaction gas,

    The cooling gas injected toward the molten slag causes the first reforming reaction to cool and granulate the molten slag and to reform the processing gas with the cooling gas together with cooling and granulating of the molten slag. ,

    The slag treatment method of performing the 2nd reforming reaction which reforms the process gas by injecting the granulated slag used for the said 1st reforming reaction by injecting a navigation process gas and a reaction gas.
24. The method according to claim 19,

    And exchanging heat generated gas generated by the reaction between the processing gas and the reaction gas to generate steam.
25. The method according to claim 19,

    Heat-exchanging the generated gas generated by the reaction between the process gas and the reactant gas and the process gas and the reactant gas to raise the process gas and the reactant gas,

    In reforming the process gas,

    The slag processing method which sprays the process gas and reaction gas heated up by the said heat exchange toward the said granulated slag.
26. The method according to any one of claims 19 to 25,

    The slag treatment method for cooling the molten slag to a temperature of 600 ℃ to 1100 ℃.
27. The method according to any one of claims 19 to 25,

    The processing gas is a slag treatment method comprising a gas generated in the steelmaking operation.
28. The method of claim 27,

    The process gas comprises a CO ₂ containing gas,

    The reaction gas is a slag treatment method comprising a CH ₄ containing gas.

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