KR100868872B1 - SMO fabricating method and apparatus using the Fe-containing sludge - Google Patents

Abstract

The present invention is to provide a method for producing an SMO by squeezing the steel sludge without using a binder in the state of containing water directly by applying heat directly to the compressed sludge to dissolve and then quenched, (a) steelmaking sludge (101) ) Into the input hopper 100 (S1); (c) pressing the iron-containing by-products including the steelmaking sludge 101 with a presser 200 (S5); (d) melting the compressed iron-containing byproduct in a melting furnace (300) (S6); (e) quenching the molten iron byproduct by a cooling device (S7); And (f) separating the sludge molten light (SMO) 401 having a particle size of a predetermined size or more generated when quenching the molten iron byproduct. Characterized in that it comprises a.

Sludge, Molten Iron By-Product, Quench, SMO (Sludge Molten Ore)

Description

SMO fabricating method and apparatus using iron-containing sludge

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the processing sequence of the conventional method of recycling steelworks generation waste.

2 is a flow chart of the manufacturing process of the present invention according to the present invention.

Figure 3 is a photograph of the actual product according to the SMO production of the present invention.

4 is a schematic view showing an apparatus for manufacturing an SMO product according to a first embodiment of the present invention.

5 is a schematic view showing an apparatus for manufacturing an SMO product according to a second embodiment of the present invention.

* Explanation of Signs of Major Parts of Drawings *

100: collection hopper 101: steelmaking sludge

200: pressing machine 201: compressed steelmaking sludge

202: motor 203: reducer

204: outlet 300: melting furnace

301: molten steelmaking sludge 302: dust collector

303: burner 304: outlet

400: cooling device 401: SMO

402: primary cooler 403: secondary cooler

404: Screen 305: Chute

306: Cylinder 307: Bracket

500: tank 501: fine particles

502: collection hopper 503: coolant

109, 409, 509, 509 ', 609: valve

The present invention relates to a method for producing sludge molten ore (SMO: Sludged Molten Ore) prepared by dissolving steelmaking sludge in an iron byproduct as a method for recycling iron-containing by-products generated at an ironworks.

Iron-containing by-products generated in steel mills include blast furnace sludge, OG sludge from steel mills, sludge cakes, EP, EC, LT dust (DUST), hot rolled oil sludge, and mill scale. Most of them are industrial wastes, which have been manufactured and used as separate products for the purpose of waste recycling.

However, since most of the sludge containing powder or a large amount of water cannot be recycled alone, it is compressed into a molding machine and manufactured into a molded body.

Products manufactured and recycled from molded products include briquettes, sludge pressed bricks (SPB), cold bonded pellets (CBP), and mill scale pellets (MSP) .They are used for blast furnaces, housewife raw materials in electric furnaces, coolants in converters, and oxidizing agents. For example, it is used as a scrap metal replacement (However, the MSP is a product intentionally manufactured by a separate process on a mill scale and cannot be viewed as waste in a strict sense).

For example, the steelmaking sludge produced in the steelmaking plant is the dust collected during the blowing process by oxygen in the converter, the granulated particles of about 60㎛ or more is first screened, the fine particles of 60㎛ or less after the concentration and dehydration treatment sludge Occurs as a cake.

Steelmaking sludge contains a large amount of Fe and CaO components, but its fine powder and high water content have reached the moisture content of OG sludge (19 ~ 35%), and it is impossible to landfill, so EP, EC, L generated from dry dust collector due to waste recycling. / T Dust and sludge are dried and mixed with binders with high sulfur [S] content such as fine ore, cement, molasses, and pressed by briquette method to produce dust briquettes, SPB, CBP, and mill scale. (Mill Scale) is used to prepare the MSP by mixing with the binder.

On the other hand, as a product manufactured and recycled in general, as described above, there are briquettes, SPB, CBP, MSP, etc., but MSP is not a waste, so look at the components of the recycled product except this as shown in Table 1 .

T.Fe CaO Al ₂ O ₃ P S Zn K ₂ O + Na ₂ O OG sludge 63 10.3 0.23 0.06 0.08 1.4 0.4 + 0.2 Dust briquette 62.8 0.16 CBP 42 10.0 2.0 0.07 0.48 0.54 0.52 + 0.09 SPB 58 0.37 0.20 0.78

As such, molasses, cement, and ore molasses used as binders in the manufacture of dust briquettes, SPB, and CBP have a high content of [S], which is a harmful component in the manufacture of molten iron and molten steel, which impairs the quality of molten iron and molten steel. And the strength is low, so the amount of dust generated is about 30% due to differentiation and collapse during the dumping of raw materials and conveyance of the belt conveyor.It is recollected during environmental pollution and input of raw materials, which increases dust generation and decreases the input error rate. I have a problem.

On the other hand, there is a method such as the Republic of Korea Patent No. 431672 to the recycling method of waste generated in the steel mill. This will be described with reference to FIG. 1.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the processing procedure of the recycling method of the conventional steelworks wastes.

First, the pre-treatment of the object to be processed is performed. The dust (1-1) generated at the steel mill, such as dust or incineration ash, collected from iron ore debris, the steelmaking process, or the steelmaking process, is a carbonaceous reducing agent such as pulverized coal or coke powder (3). ) And the wet mixing tank 4 is mixed, and then the dewatering device 5 is used to make the dehydrating cake. The dewatering cake is put into the rotary furnace 7. In addition, slag products such as ashes that have been incinerated among the dust 1-1 generated in steel mills may be directly introduced into the rotary furnace 7.

Since most of the sludge produced in the steel mill resulting from the plating process or the pickling process is difficult to dehydrate, the sludge 1-2 is directly injected into the rotary furnace 7 without wet mixing. Of the sludge 1-2 injected directly, when carbon reduction is required, when this is directly injected, the external reducing agent is added to the separate rotary furnace 7 to cope with it.

In addition, various wastes (2) such as waste paper, wood chips, plastic waste, pulp chips, pulp residue, or waste oil are treated as auxiliary substances of the reducing agent or carbonaceous reducing agent (3), as in the carbon reducing agent (3). It can mix and use with the wet mixing tank 4 with respect to water. Among the various wastes 2, those having a small specific gravity or containing oil are not suitable for wet mixing and are used by being directly put into the rotary furnace 7.

The atmospheric temperature of the to-be-processed object input part of the rotary furnace 7 is 500-700 degreeC. The rotary furnace 7 is a parallel flow type provided with the heating burner 6 in the input part of the to-be-processed object. Next, heating, reduction, and melting of the workpiece in the rotary furnace 7 are performed. That is, the to-be-processed object thrown in the rotary furnace 7 is heated by the burner 6 provided in the input stage side, moving the inside of the rotary furnace 7 toward the discharge end side, and following process (1)- After being melted for reduction while passing through (4), it is separated into molten metal and slag, discharged from the rotary furnace 7, and further cooled.

Process (1): The to-be-processed object thrown into the rotary furnace 7 in a drying process is dried by the evaporation of the moisture contained with temperature rise, and moves in the rotary furnace 7. At this time, the object to be processed may be granulated.

Process (2): In the reduction process, the reduction reaction of oxides such as iron, chromium, nickel, zinc, and lead contained in the object to be treated becomes active from the time of completion of drying, and when the temperature of the bed is about 1000 to 1200 ° C. Reduction is almost complete. Metals, such as low-boiling zinc produced by reduction, evaporate and migrate from a reducing bed to an oxidizing gas space, which is oxidized in this atmosphere and scatters with the exhaust gas to the outside of the rotary furnace 7. The dust is collected by the dust collector 14 of the next stage.

In addition, high boiling point metals such as reduced iron stay in the reducing bed. Carbon monoxide is produced as a reduction reaction product of these metal oxides, which is burned in the vertically upward direction of the bed by the excess air from the burner 6, contributing to the heating of the bed together with the heat gas by the burner 6. The combustion frame of carbon monoxide also contributes to maintaining the bed in a reducing atmosphere.

Step (3): In the melting step, the reduction by the gas / solid reaction is completed, and further, when the temperature is raised to 1200 ° C or higher, the reduced iron becomes pig iron while saturating carbon as the reducing agent and melts. The molten product is mainly a high-carbon iron alloy, taking metals such as chromium and nickel into it. The remaining oxide from which the iron alloy component is separated, that is, SiO ₂ , CaO, Al ₂ O _3, etc., becomes slag. These are transferred to the discharge portion maintained at 1250 to 1300 ° C. of the rotary furnace 7, where the molten metal and the slag are separated by the difference in specific gravity, and the slag covers the surface of the molten metal having a large specific gravity, and the upper layer is present. Slag also serves to shield the molten metal from oxidizing atmospheres. Molten metal and slag separated by the difference in specific gravity are discharged to the cooling water tank 10 at the discharge end of the rotary furnace (7).

Process (4): In the process and cooling process of discharging molten metal and slag from the rotary furnace 7, the cooling water tank in which molten metal and slag discharged from the rotary furnace 7 were installed below the discharge end of the rotary furnace 7 is carried out. It is injected into (10) and cooled. The inside of the cooling water tank 10 is stirred with circulating water, and it is a structure by which molten metal and slag are cooled sufficiently. The cooled molten metal, ie the iron alloy and the slag, is discharged out of the system by the conveyer 12. If it is necessary to separate the ferroalloy from the slag for the purpose of recovery, the magnet is separated in the next step.

Next, the exhaust gas from the rotary furnace 7 is processed. The exhaust gas from the rotary furnace 7 is introduced into the secondary combustion chamber 11 connected to the discharge end of the rotary furnace 7, where complete combustion and unhealthy substances of unburned material in the exhaust gas of the rotary furnace 7 are carried out. The pyrolysis is carried out and sent to an apparatus (heat exchanger 13 such as a boiler) for heat recovery. The gas exiting from the heat exchanger 13 such as a boiler is discharged to the atmosphere via the dust collector 14.

However, the above-mentioned prior art is said to separate zinc and the like having a low boiling point by reducing boiling point, and that the molten metal and slag are separated by the difference in specific gravity and magnet, so that the effect is unknown compared to the complexity of the apparatus.

In the present invention, the research and experiments were repeated to more efficiently recycle iron-containing by-products, and the present invention was proposed based on the results, and the present invention was pressed in a state in which water was contained without using a binder in steelmaking sludge. By applying heat directly to the compressed sludge to dissolve it and then quenching it.In particular, if necessary, the molten sludge is controlled by adjusting the dissolution rate and the inclination angle of the race chute 305 and quenching with a cooling device to adjust the size of the particles. Its purpose is to provide a SMO manufacturing method.

In order to achieve the above object, the present invention provides a burner 303 in a high temperature melting furnace 300 in a range of 500 ° C to 1300 ° C while being pressed while passing the steel-containing sludge 101 containing water through the primary screw presser 200. ) Using a heat source such as COG, O ₂ , LPG, LNG, heavy oil and the like to directly contact the raw material with a flame to dissolve and then quenched to provide a method for producing the SMO (401).

In order to achieve the above object of the present invention, the method for producing SMO using iron-containing by-products according to an aspect of the present invention includes: (a) injecting steelmaking sludge 101 into which the binder is not mixed into the input hopper 100 (S1). ); (c) compressing the iron-containing by-products including the steelmaking sludge 101, in which the binder is not mixed, with a compactor (S5); (d) Melting the compressed iron by-products in the melting furnace 300, using a burner 303 in the high temperature melting furnace 300 in the temperature range 500 ℃ to 1,300 ℃ to directly contact the iron by-products of the burner more than 2000 ℃ To complete melting (S6); (d ') flowing the completely molten iron by-product to an outlet (304); (e) quenching the completely molten iron by-product flowing down from the outlet by the cooling device 400, and quenching by directly spraying the cooling water from the coolers 402 and 403 to the flowing-down molten iron-containing byproduct directly (S7). ; And (f) separating the sludge molten light (SMO) 401 having a particle size of a predetermined size or more generated when quenching the molten iron byproduct. Characterized in that it comprises a.

Preferably, after the step (a), (b) adding the steelmaking dust (EP, EC) (S2), and further comprising the step of mixing with the steelmaking sludge (S2-S4),

Most preferably, before the quenching step of step (e), the inclination angle of the outlet 304 is adjusted between 5 degrees and 65 degrees to control the flow rate of the molten iron by-product and then quenched by the cooling device 400. It is characterized by.

delete

On the other hand, SMO manufacturing apparatus using iron-containing by-product according to another aspect of the present invention for achieving the object of the present invention, including the steelmaking sludge 101, but the binder is not mixed with iron-containing by-product is supplied to the next device Injecting hopper 100; The binder transferred from the input hopper 100 is a compactor 200 for pressing the unmixed iron by-products; A high temperature melting furnace 300 having a temperature of 500 ° C. to 1,300 ° C. that melts the moderately compressed iron by-product by flowing down from the presser 200, and directly flames the burner 303 of 2000 ° C. or higher directly to the iron by-product. Melting furnace 300; Melting furnace outlet 304 for flowing the completely molten steelmaking sludge located at the end of the melting furnace; A cooling device (400) for quenching the molten steelmaking sludge (301) flowing down from the discharge port, and spraying the cooling water from the coolers (402,403) directly to the flowing molten steelmaking sludge; And a screen 404 that is quenched by the cooling device to discharge the SMO 401 having a predetermined size or more to the discharge hopper 600 and to separate and discharge the fine particles 501 and the cooling water having a smaller particle size to the water tank 500. Characterized in that it comprises a.

Preferably, the melting furnace 300, in order to control the speed flowing down through the outlet 304 of the molten steelmaking sludge 301 flowing down, it is possible to adjust the inclination angle of the race chute 305 of the outlet Characterized in that,

More preferably, the melting furnace 300, when the flame of the burner is more than 2000 ℃ directly to the molten iron by-product transported from the compactor 200 to be melted, the dust generated during melting through the dust collector 302 It is characterized in that it comprises collecting and recycling.

Hereinafter, described with reference to the accompanying drawings a preferred embodiment of the present invention.

2 is a flowchart of a manufacturing process according to the present invention, Figure 3 is a photograph of the actual product according to the manufacturing of the SMO of the present invention, Figure 4 is a schematic diagram showing the manufacturing apparatus of the SMO product according to the first embodiment of the present invention. 5 is a schematic view showing an apparatus for manufacturing an SMO product according to a second embodiment of the present invention.

First, as shown in FIG. 4, the first embodiment of the manufacturing apparatus according to the present invention will be described in detail.

The apparatus of the present invention is largely a hopper 100 for introducing the steelmaking sludge 101, a screw presser 200 for compressing the steelmaking sludge conveyed from the hopper 100 through the feeder 102, and an outlet ( The melting furnace 300 for melting the appropriately compressed steelmaking sludge 201 flowing down from the compactor 200 through the 204 through the burner 303, and the molten steelmaking sludge 301 flowing down through the outlet 304 The cooling device 400 including the primary cooler 402 and the secondary cooler 403 to cool, and the SMO 401 which is quenched by the cooling device to have a certain particle size or more are discharged to the discharge hopper 600 and the particle size is reduced. Particles 501 having less than a predetermined value and the cooling water may include a screen 404 that separates and discharges the water tank 500.

In more detail, the hopper 100 supplies the iron by-products such as the steelmaking sludge 101 or the sludge cake into the screw presser 200 through the feeder 102. Reference numeral 109 is a valve.

The screw presser 200 presses the transferred steelmaking sludge 201 to the outlet of the presser by means of a screw, which is made by a screw axially coupled to the motor 202 and the reducer 203, and the pressed steelmaking sludge ( 201 is sent to the next furnace 300 through outlet 204.

Melting furnace 300, the steelmaking sludge conveyed from the compactor 200, the bar, COG, O ₂ , LPG, LNG, heavy oil and the like mixed with air as a heat source steelmaking sludge 201 compressed through the burner 303 ) So that the sludge is melted by the heat of combustion (about 2000 ° C. or more), and dust generated during melting is collected and recycled through the dust collector 302.

Next, the steelmaking sludge 301 melted in the melting furnace 300 is sent to the next stage cooling device 400 through the discharge port 304. The chiller includes a primary cooler 402, a secondary cooler 403, and a screen 404 that shoot coolant to cool the molten steelmaking sludge 301, wherein the coolers 402, 403 Steelmaking sludge quenched by the crack is generated, and is broken into particles of a certain size (see Fig. 3), it is possible to adjust the size of the desired particle size according to the cooling rate.

In addition, the SMO 401 having a predetermined size or more is discharged to the discharge hopper 600 of the final stage, so that it can be used as a coolant for steelmaking, dephosphorization, blast furnace, sintering and electric furnace raw materials, or as an alternative to scrap metal, Particles 501 and cooling water 503 having less than a predetermined value are separated and discharged into the water tank 500 through the collection hopper 502.

Reference numerals 409, 509, 509 'and 609 are valves.

On the other hand, referring to Figure 5, the second embodiment of the manufacturing apparatus according to the present invention will be described in detail, the device of the second embodiment is different in the configuration of the outlet of the melting furnace and the device of the first embodiment. The same components as those in the remaining first embodiment are assigned the same member numbers, and detailed description thereof will be omitted.

In the second embodiment, as shown in FIG. 5, the steelmaking sludge 201 moderately compressed in the compactor 200 is melted by the burner 303 of the melting furnace 300 and flows through the outlet 304, and the outlet ( The molten steel sludge 301 flowing down by adjusting the inclination angle of the outlet port 304 by causing the cylinder 306 to contract and relax about the fixed bracket 307 of the race chute 305 that controls the inclination angle of 304. After controlling the flow rate of), by quenching by the primary cooler 402 and the secondary cooler 403 of the cooling device 400, the size of the particle size can be controlled to the desired size, the size of the particle size is constant The above-described SMO 401 is discharged to the discharge hopper 600, the particle size of the particle size less than a certain 501 and the cooling water is separated into the water tank 500, the following configuration is the same as the first embodiment Do.

Eventually, according to the second embodiment, the steelmaking sludge quenched by the coolers 402 and 403 is cracked and broken into particles of a certain size (see Fig. 3), and the dissolution rate and light chute 305 According to the flow rate of the inclination angle of the desired particle size can be adjusted.

Now, a method for manufacturing an SMO using an iron byproduct, which is another aspect of the present invention corresponding to the operation of the SMO manufacturing apparatus using the iron byproduct, will be described with reference to FIGS. 2 and 4.

First, the steel-making sludge 101 containing water is introduced into the hopper 100 (S1), and sometimes steelmaking dust (EP, EC) is added (S2), and these are prepared using separate equipment. Mix (S3, S4).

The iron-containing by-products, such as steelmaking sludge 101, which are kneaded in this way, are fed into the screw presser 200 by the feeder 102, and the screw is rotated to push out the raw material to receive the sludge containing moisture in a moderately compressed state. After making (S5), it flows down to the furnace 300 through the circular outlet 204 at the end.

In the melting furnace 300, air is mixed with COG, O ₂ , LPG, LNG, heavy oil, etc. as a heat source, and the flame directly touches the sludge 201 compressed through the burner 303, so that the combustion heat (about 2000 ° C. or more) By melting the sludge (S6), the dust generated during melting is collected and recycled through the dust collector, the molten sludge melt 301 is cooled in the molten state through the melting furnace outlet 304 of the cooling device 400 Send it to the chute.

In the cooling device 400, the coolant is injected into the primary cooler 402 to cool the primary, and the coolant is also injected into the secondary cooler 403 to quench and dry the molten steelmaking sludge 301. (S7).

Therefore, cracks are generated in the process of quenching the sludge melt so that the sludge molten light (SMO) 401 having a particle size of 5 to 50 mm is manufactured (S8) and discharged into the discharge hopper 600 at the final stage, for steelmaking. It is transported to be recycled as coolant, dephosphor, blast furnace, sinter and electric furnace raw materials, or scrap metal replacement (S9).

Meanwhile, the particles 501 and the cooling water 503 having a particle size of 4 mm or less are separated from the screen 404 and separated and discharged into the water tank 500 through the collection hopper 502, and the separated cooling water and the particles are recycled.

Hereinafter, the present invention for the SMO manufacturing method will be described through an embodiment of the SMO manufacturing method of the present invention.

Example 1

In this embodiment, the iron-containing by-products are pressed with a press in the state of 10 to 50% moisture content, and the compressed iron-containing by-products in the high temperature melting furnace 300 in the temperature range of 500 ℃ to 1,300 ℃ COG, O ₂ , LPG, LNG, The burner 303 is directly heated to a raw material using a heat source such as heavy oil and dissolved directly, followed by quenching. Finally, the SMO 401 is shaped as shown in FIG. Was prepared.

<Table 2> is a test analysis value of the SMO prepared by the above examples, the melting test was carried out in a test furnace.

                               Analysis test report                                 Assay test results (Unit:%) No SiO2 MnO T-Fe FeO M-Fe Pure FeO Fe ₂ O ₃ C S Remarks One 1.95 0.65 65.47 66.65 0.32 66.24 19.52 0.057 0.080 Below White space

The temperature of the melting furnace 300 is about 500 ~ 1300 ℃, steelmaking sludge 101 melting is SMO (401) manufactured by direct heating method by the heat of combustion of the heat source used, with respect to the test analysis value of <Table 1>, <Table 3> is an analysis comparison of T.Fe (%) and [S] compared to existing recycled products (briquette, SPB, CBP, etc.).

T.Fe S Remarks SMO 65.47 0.08 Dust briquette 62.8 0.16 CBP 42 0.48 SPB 58 0.20

As shown in Table 3, the SMO 401 manufactured by the present invention has a very small content of [S], despite the fact that the content of T.Fe is not large or large. It can be seen that the reprocessing method of is superior to the conventional method of using waste.

Example 2

On the other hand, in the second embodiment, under the same conditions as the first embodiment, the iron-containing by-products are pressed with a press under a water content of 10 to 50%, and the pressed iron-containing by-products are heated at a temperature of 500 ° C to 1,300 ° C. In 300), a heat source such as COG, O ₂ , LPG, LNG, heavy oil, and the like is directly heated using the burner 303 to dissolve the raw material, and then the race chute 305 is fixed to the fixed bracket 307 around the cylinder. The flow rate is controlled by adjusting the inclination angle of the discharge port at 306, and then sent to the cooling chute of the cooling device 400, and in the cooling device 400, the coolant is injected into the primary cooler 402 to make the primary flow. After cooling, the coolant is also injected into the secondary cooler 403 to quench and dry the molten steelmaking sludge 301.

Dissolution rate of the sludge melt and the inclination angle of the race chute 305 can be adjusted from 5 degrees to 65 degrees and when the flow rate is controlled by the inclination angle to cool, the flow rate is small, the particle size is small, if the flow rate is slow particle size Is large, and cracks are generated during the quenching process to produce a sludge molten light (SMO) 401 having a particle size of 5 to 50 mm.

While the invention has been described in connection with specific embodiments, it will be apparent that many other embodiments, modifications and applications are possible to those skilled in the art, and the scope of the invention is set forth in the following claims. Should be limited only by

As described above, the sludge molten ore (SMO) 401 product manufactured through the present invention is preferable in terms of recycling waste by using steelmaking sludge and steelmaking dust (EP, EC) of iron-containing byproducts. SMO products are the main raw materials of blast furnace, sintering and electric furnace, and are used as coolant, dephosphorizer, and scrap metal substitute in steel mills, so they can greatly contribute to cost reduction, quality improvement and production volume, which can be expected to have a great effect on economic and environmental added value. have.

Claims (7)

(a) injecting the steelmaking sludge 101 into which the binder is not mixed into the feeding hopper 100 (S1); (c) compressing the iron-containing by-products including the steelmaking sludge 101, in which the binder is not mixed, with a compactor (S5); (d) Melting the compressed iron by-products in the melting furnace 300, using a burner 303 in the high temperature melting furnace 300 in the temperature range 500 ℃ to 1,300 ℃ to directly contact the iron by-products of the burner more than 2000 ℃ To complete melting (S6); (d ') flowing the completely molten iron by-product to an outlet (304); (e) quenching the completely molten iron by-product flowing down from the outlet by the cooling device 400, and quenching by directly spraying the cooling water from the coolers 402 and 403 to the flowing-down molten iron-containing byproduct directly (S7). ; And (f) separating the sludge molten light (SMO) 401 having a particle size of a predetermined size or more generated when quenching the molten iron byproduct; SMO manufacturing method using iron by-products comprising a. According to claim 1, After the step (a), (B) adding a steelmaking dust (EP, EC) (S2), and mixing with the steelmaking sludge (S2-S4) further comprising the SMO manufacturing method using the iron-containing by-products. The method according to claim 1 or 2, Before the quenching step of step (e), the inclination angle of the outlet 304 is adjusted between 5 degrees and 65 degrees to control the flow rate of the molten iron by-product by quenching by the cooling device 400, characterized in that SMO preparation method using by-products. delete A hopper 100 including at least steelmaking sludge 101, wherein the binder is supplied with unmixed iron by-products and supplied to the next apparatus; The binder transferred from the input hopper 100 is a compactor 200 for pressing the unmixed iron by-products; A high temperature melting furnace 300 having a temperature of 500 ° C. to 1,300 ° C. that melts the moderately compressed iron by-product by flowing down from the presser 200, and directly flames the burner 303 of 2000 ° C. or higher directly to the iron by-product. Melting furnace 300; Melting furnace outlet 304 for flowing the completely molten steelmaking sludge located at the end of the melting furnace; A cooling device (400) for quenching the molten steelmaking sludge (301) flowing down from the discharge port, and spraying the cooling water from the coolers (402,403) directly to the flowing molten steelmaking sludge; And A screen 404 that is quenched by the cooling device and has a particle size greater than or equal to a predetermined size and discharges into the discharge hopper 600, and the fine particles 501 and the cooling water having a smaller particle size are separated and discharged into a water tank 500; SMO manufacturing apparatus using iron by-products comprising a. The method of claim 5, wherein the melting furnace 300, SMO manufacturing apparatus using iron by-products, characterized in that the inclination angle of the race chute 305 of the discharge can be adjusted to control the flow rate flowing through the outlet 304 of the molten steelmaking sludge 301 flowing down . The method according to claim 5 or 6, The melting furnace 300, when the flame of the burner more than 2000 ℃ directly to the iron-containing by-products transferred from the compactor 200 to be completely melted, the dust generated during melting is collected by the dust collector 302 to recycle SMO production apparatus using iron by-products, characterized in that it comprises.

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