KR101036646B1 - An apparatus for manufacturing compacted irons of reduced materials comprising fine direct reduced irons and an apparatus for manufacturing molten irons using the same - Google Patents

Abstract

The present invention relates to an apparatus for producing compacted iron containing reduced iron, and an apparatus for manufacturing molten iron using the same. To this end, the compacted material manufacturing apparatus of the present invention is a charging hopper in which the reducing iron-containing reducing body is charged, and is installed in the charging hopper to discharge the reducing iron-containing reducing material flowing into the charging hopper, and the powder attached to the inner wall of the charging hopper. A screw feeder equipped with one or more scrapers for removing the reduced iron-containing reducing agent, and a pair of rolls for compacting the reduced iron-containing reducing material discharged from the charging hopper by the screw feeder to produce a compacted body. Through the present invention as described above, a compacted material having good quality can be produced.

Scraper, Charging Hopper, Compactor Manufacturing Equipment, Iron Making Equipment, Screw Feeder

Description

Device for producing compacted iron containing reduced-ring iron, and apparatus for manufacturing molten iron using the same

1 is a schematic perspective view of a compacted article manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view taken along line AA of FIG. 1.

3 is a schematic partial cross-sectional view taken along line BB of FIG. 2.

4 is a view illustrating a state in which a scraper is assembled to a screw feeder.

5 is a view schematically showing a molten iron manufacturing apparatus including a compacted material manufacturing apparatus according to an embodiment of the present invention.

The present invention relates to a compacted material manufacturing apparatus and a molten iron manufacturing apparatus using the same, and more particularly, compacted material manufacturing apparatus for manufacturing compacted material by compressing a reduced body containing direct reduced iron (DRI) and molten iron using the same It relates to a molten iron manufacturing apparatus for manufacturing a.

The steel industry is a key industry that supplies basic materials to the entire industry, such as automobiles, shipbuilding, home appliances, construction, etc., and is one of the oldest industries with the development of mankind. Steel mills, which play a pivotal role in the steel industry, use molten iron and coal as raw materials to produce molten pig iron, which is then manufactured and supplied to each customer.

Currently, about 60% of the world's iron production comes from the blast furnace method developed since the 14th century. The blast furnace method is a method of manufacturing molten iron by reducing iron ore to iron by putting together coke prepared from sintering process and coke made from bituminous coal into a blast furnace. The blast furnace method, which is a large scale of the molten iron production equipment, requires a raw material having a certain level or more of strength and a particle size capable of ensuring the breathability in the furnace due to its reaction characteristics. As described above, the blast furnace method is a carbon source used as a fuel and a reducing agent. Relies on coke processing specific raw coal, and iron sources mainly rely on sintered ore through a series of bulking processes. As a result, the current blast furnace method necessarily involves preliminary processing of raw materials such as coke manufacturing facilities and sintering facilities. Therefore, it is not only necessary to construct auxiliary facilities other than blast furnaces, but also Due to the need for the installation of environmental pollution prevention equipment, there is a problem in that the manufacturing cost is rapidly increased due to the large investment cost.

In order to solve the problems of the blast furnace method, molten reduction of molten iron is produced by directly using general coal as a fuel and a reducing agent in steel mills around the world, and by directly using spectroscopy that occupies 80% or more of the world's ore production as an iron source. Many efforts are being made in the development of the steelmaking method.

U.S. Patent No. 5,534,046 discloses an apparatus for manufacturing molten iron that uses plain coal and spectroscopy directly. The apparatus for manufacturing molten iron disclosed in U.S. Patent No. 5,534,046 consists of a three-stage flow reduction reactor in which a bubble fluidized bed is formed and a melt gasification furnace connected thereto. The spectroscopy and subsidiary materials at room temperature are charged to the first flow reduction reactor, followed by three flow reduction reactors in sequence. Since the high temperature reducing gas is supplied from the melt gasifier to the three-stage flow reduction furnace, the spectroscopic and secondary raw materials at room temperature are heated in contact with the high temperature reducing gas. At the same time, the spectroscopy and secondary raw materials at room temperature are reduced by 90% or more, fired by 30% or more, and charged into the melt gasifier.

Coal is supplied into the melt gasifier to form a coal filling layer, and spectroscopy and subsidiary materials at room temperature are melted and slaked in the coal filling layer and discharged into molten iron and slag. Oxygen is blown through a plurality of air vents installed on the outer wall by melting gasification, is converted into a high temperature reducing gas while combusting the coal packed bed, and is sent to a fluid reduction reactor to reduce spectroscopy and secondary raw materials at room temperature, and then are discharged to the outside.

However, in the above-described molten iron manufacturing apparatus, since a high-speed gas stream is formed in the upper part of the molten gasifier, there is a problem in that the branched iron and the subsidiary materials charged into the molten gasifier are scattered. In addition, when charging reduced iron and secondary raw materials into the molten gasifier, there is a problem that it is difficult to ensure the air permeability and liquidity of the coal filling layer in the molten gasifier.                         

In order to solve this problem, a method of compacting the reduced iron and secondary raw materials and charging them in a molten gasifier has been studied. In this regard, U. S. Patent No. 5,666, 638 discloses a method and apparatus for producing elliptical sponge iron briquettes. Further, US Pat. Nos. 4,093,455, 4,076,520, and 4,033,559 disclose methods and apparatus for producing plate- or corrugated irregular sponge iron briquettes. Here, the branched iron is heated to high temperature briquettes and cooled to be suitable for long distance transportation to produce spongy iron briquettes.

In the case of press-molding the reduced ring iron, when the charged amount of the reduced ring iron is increased to increase the yield, a large amount of high-temperature reduced ring iron with viscosity is attached to the inner wall of the charging hopper and does not fall well. Accordingly, since the charging hopper is blocked and the reduced iron cannot be smoothly supplied to the roll, the operation is stopped and the production of the reduced iron briquette is greatly reduced, and there is a problem in that it takes a lot of cost and time to maintain the charging hopper.

The present invention has been made to solve the above-described problems, and an object thereof is to provide a compacted article manufacturing apparatus suitable for mass production of compacted sheets.

Moreover, an object of this invention is to provide the molten iron manufacturing apparatus which can manufacture molten iron of high quality using the compacted material of good quality.

In order to achieve the above object, the compacted material manufacturing apparatus of the present invention is installed in a charging hopper into which a reducing iron-containing reducing body is charged, and discharged the reducing iron-containing reducing body introduced into the charging hopper and discharges the inner wall of the charging hopper. A screw feeder equipped with one or more scrapers to remove the reduced reducing iron-containing reducing agent attached to the briquette, and the reduced reducing iron-containing reducing body discharged from the charging hopper by the screw feeder to compact and briquette It includes a pair of roll (roll) to manufacture.

Here, the scraping surface of the scraper may be formed to be spaced apart from the inner wall of the charging hopper by a uniform distance and extend in the longitudinal direction of the inner wall of the charging hopper.

And the scraping surface may be spaced apart from the screw feeder to form a space between the screw feeder.

In addition, it is preferable that both ends of the scraping surface are bent and fixed to the screw feeder.

Both ends of the scraping surface may be bent while having a curvature.

At least one of both sides of the scraping surface may be formed by inclining in the direction of rotation of the screw feeder.

It is preferable that the scrapers for removing the reduced-iron-containing reducing body adhering to the inclined surface of the charging hopper are different from each other in bending lengths bent from both ends of the scraping surface and extended to the screw feeder surface.

Moreover, a screw is attached to the lower part of the center axis of a screw feeder, and the scraper from which a bending length differs can be provided in the upper part of a screw.

The scraper may include a scraping member for removing the reduced-iron-containing reducing body attached to the inner wall of the charging hopper, and a pair of support members connected to both ends of the scraping member and fixedly mounted to the screw feeder.

And the support member is preferably screwed to the screw feeder.

The scraping member may comprise a scraping surface for removing the reduced iron-containing reducing body attached to the inner wall of the charging hopper, and the scraping member may be bent at the scraping surface and connected to the support member.

It is preferable that the scrapers for removing the reduced-ring iron-containing reducing body attached to the inclined surface of the charging hopper have different bending lengths from both ends of the scraping surface to be connected to the pair of supporting members.

The scraper includes a first support member attached to the screw feeder and a second support member positioned below the first support member and attached to the screw feeder, the bending length connected to the first support member being connected to the second support member. It is preferred to be longer than another bending length.

Two or more scrapers may be mounted along the length of the screw feeder.

Here, two or more scrapers may be alternately mounted in opposite directions with a screw feeder interposed therebetween.

The molten iron manufacturing apparatus of the present invention includes a compacted body manufacturing apparatus having the above-described structure, a crusher for crushing the compacted body discharged from the compacted body manufacturing apparatus, and a melt gasifier for charging and melting the compacted material crushed in the crusher.

In addition, at least one coal selected from lump coal and coal briquettes may be supplied to the melting gasifier.                     

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 5. These embodiments of the present invention are merely for illustrating the present invention and the present invention is not limited thereto.

1 is a schematic perspective view of a compacted body manufacturing apparatus according to an embodiment of the present invention, which includes a charging hopper 10 and a pair of rolls (including a gear attached to an end of a roll) 20. The compacted-body manufacturing apparatus 100 is shown schematically. The structure of the compacted body manufacturing apparatus shown in FIG. 1 is only for illustration of this invention, Comprising: This invention is not limited to this. Therefore, the form of the compacted body manufacturing apparatus can be modified into various other structures.

Through the opening 16 located in the center of the charging hopper 10 shown in FIG. 1, the reducing body containing a branched iron is charged in the direction shown by arrow A '. The reduced iron-containing reducing body is prepared from iron ore, and may further include an auxiliary material, and is reduced and manufactured through a multi-stage flow reduction furnace. You may charge into the charging hopper 10 the reduced-ring iron containing reducing body manufactured by other methods. An exhaust hole 14 is formed in an upper portion of the charging hopper 10 to remove the gas generated from the high-temperature reducing iron-containing reducing substance flowing into the charging hopper 10.

The charging hopper 10 includes a guide tube 70, which is fitted into a feeding box 30 located below and is connected to the feeding box 30. The lower part is fixedly supported by a cheek plate (not shown).

In the charging hopper 10, a screw feeder 12 is provided for discharging the reduced-iron-containing reducing substance flowing into the charging hopper 10 into a gap between the pair of rolls 20. The gap here refers to the space between the rolls which exist along the longitudinal direction of a pair of rolls. Screw feeder 12 has a screw formed at the bottom, forcibly discharged to the lower portion by the rotation of a motor (not shown) attached to the reducing iron-containing reducing body collected in the lower portion by gravity.

A pair of rolls 20 located in a roll casing 24 compresses the reduced reducing iron-containing reducing substance discharged by the screw feeder 12 from the charging hopper 10 to produce compacted material. The pair of rolls 20 are spaced apart from each other to form a gap to produce a compact. The roll cover 26 is attached to the outside of the roll 20.

Hereinafter, a scraper installed along the longitudinal direction of the screw feeder in the internal structure of the compacted material manufacturing apparatus according to an embodiment of the present invention, in particular, the charging hopper, will be described in more detail with reference to FIG. 2.

FIG. 2 is a schematic cross-sectional view taken along the line AA of FIG. 1 in a Z-axis direction, in which a screw feeder equipped with one or more scrapers 18 for removing a reducing iron-containing reducing agent attached to the inner wall of the charging hopper 10 ( 12).

Both ends of the scraping surface of the scraper 18 which removes the high temperature reducing iron-containing reducing agent are bent and connected to the screw feeder 12. Here, both ends of the scraping surface are bent with curvature. As a result, the scraping performance of the scraper 18 can be maximized, and since corner portions do not form an angle, there is an advantage of minimizing driving resistance upon contact with the reducing iron-containing reducing agent.                     

Although FIG. 2 shows that two scrapers 18 are provided along the longitudinal direction of the screw feeder 12, this is merely to illustrate the present invention, and the present invention is not limited thereto. Therefore, two or more scrapers can be mounted along the longitudinal direction of the screw feeder.

The scraper 18 has a scraping surface 180 (shown below in FIG. 3, which is the same below) for removing the reduced-iron-containing reducing substance attached to the inner wall 102 of the charging hopper and the inner wall 102 of the charging hopper 10. It is formed to be spaced apart at a uniform distance and extend in the longitudinal direction of the inner wall 102 of the charging hopper 10. In particular, the scraping surface extends in the longitudinal direction of the inner wall 102 of the charging hopper 10 so that the area in which the scraping surface faces the inner wall 102 of the charging hopper 10 is widened, so that the inner wall 102 of the charging hopper 10 is extended. A large amount of the high-temperature reduced-iron-containing reducing substance attached to it may be removed and supplied to the roll 20. In addition, since the scraping surface is spaced apart from the screw feeder 12 to form a space between the screw feeder 12, a reducing iron-containing reducing agent can pass through the inner space, thereby minimizing the load on the screw feeder 12. have.

In particular, the scraper 18 for removing the reduced-ring iron-containing reducing agent attached to the inner wall inclined surface 104 of the charging hopper 10 is bent from both ends of the scraping surface and extends to the screw feeder surface h ₁ , h _2. ) Are different from each other. Therefore, even if the inner wall of the charging hopper 10 is formed on the inclined surface 104, there is an advantage that the high-temperature ring reducing iron-containing reducing agent attached to the inclined surface 104 can be removed and loaded into the lower roll 20.

The inclined surface 104 of the charging hopper 10 is the upper portion of the screw 122 in order to discharge the high-temperature reduced iron-containing reducing agent through the screw 122 mounted on the lower portion of the central axis of the screw feeder 12 It is formed by attaching the guide tube 70 to the lower portion of the charging hopper 10 while reducing its inner diameter. Therefore, it is preferable to attach a scraper 18 having a different bending length to the screw feeder 12 as described above directly above the screw 122.

Hereinafter, the arrangement angle of the scraper will be described in more detail with reference to FIG. 3.

FIG. 3 is a schematic partial cross-sectional view taken along the line BB of FIG. 2 showing a screw feeder 12 with a scraper 18 mounted on the charging hopper 10.

In FIG. 3 two scrapers 18 mounted along the length of the screw feeder 12 and present up and down are shown on the same plane. Two or more scrapers 18 comprising a scraping surface 180 and a connection 181 between the scraping surface 180 and the screw feeder 12 are alternately mounted to the screw feeder 12 in opposite directions. Accordingly, when the screw feeder 12 is rotated as indicated by the arrow, it is possible to periodically scrape off and remove the reduced iron-containing reducing agent attached to the charging hopper, as well as to mechanically balance the screw feeder, which is a rotating body, There is no fear of malfunction. Hereinafter, the structure of the scraper mounted on the screw feeder will be described in more detail.

FIG. 4 is a view illustrating a state in which a scraper is assembled to a screw feeder, and specifically illustrates a scraper 18 that is screw-assembled along a length direction of the screw feeder 12.

The scraper 18 shown in FIG. 4 includes a scraping member 184 for removing the reduced-iron-containing reducing element attached to the inner wall of the charging hopper, and a pair of supporting members connected to both ends of the scraping member and fixed to the screw feeder. (186).

The scraping member 184 includes a scraping surface spaced apart from the inner wall of the charging hopper by a predetermined distance to remove the reducing iron-containing reducing agent attached to the inner wall of the charging hopper, and is bent at the scraping surface to be connected to the support member 186. do. Since the scraping member 184 is bent to both sides to form a recess at its end, the supporting member 186 can be inserted therein to easily assemble both. A screw groove is formed at the end of the support member 186, and is assembled by a nut 188 penetrating the screw feeder 12 and attached to the opposite side of the screw feeder 12.

An enlarged circle of FIG. 4 shows a cross section taken along line CC of the scraping surface of the scraping member 184. As shown in the enlarged circle of FIG. 4, at least one of both side surfaces 1845 of the scraping surface is inclined in the rotational direction of the screw feeder 12. In the enlarged circle of FIG. 4, although both sides 1845 of the scraping surface are shown as being inclined, this is merely to illustrate the present invention, and at least one of both sides 1845 of the scraping surface is screw feeder 12. What is necessary is just to form inclination to the rotation direction of (). As described above, according to the structure of the inclined side surface 1845, the reduced-ring iron-containing reducing agent that is caught on the scraping surface when the screw feeder 12 rotates as shown in the arrow direction can be more easily removed.

In particular, in the case of using the scraper 18 of the present invention for the purpose of removing the reduced reducing iron-containing reducing substance attached to the inclined surface of the charging hopper, the structure of the scraper 18 is changed to the screw feeder 12 as follows. I can attach it.

That is, the scraper 18 attached to the lower portion of the screw feeder 12 is bent at both ends of the scraping surface in order to remove the reduced iron-containing reducing body attached to the inclined surface of the charging hopper and is connected to the pair of support members 186. The bending lengths h ₃ and h ₄ to be different from each other. The scraper 18 is a support member 186 which is attached to the screw feeder 12 and is located below the first support member 1862 and the first support member 1862 attached to the screw feeder 12. Member 1864. Here, the bend length h ₃ connected from the end of the scraping surface to the first support member 1862 is longer than the bend length h ₄ connected from the end of the scraping surface to the second support member 1864. Since the scraping surface is inclined toward the lower portion of the inner wall of the charging hopper, the scraping surface does not come into contact with the inner wall of the charging hopper, and the reduced-iron-containing reducing agent attached to the inner wall of the charging hopper is attached to the rotation of the screw feeder 12. Can be removed easily.

In this way, by removing the high temperature reducing iron-containing reducing body attached to the inner wall of the charging hopper to prevent the growth of the reducing iron-containing reducing body on the inner wall, stable operation can be performed.

Hereinafter, a molten iron manufacturing apparatus using the compacted apparatus according to an embodiment of the present invention will be described in detail.

5 is a view schematically showing a molten iron manufacturing apparatus using a compacted material manufacturing apparatus according to an embodiment of the present invention, showing a molten iron manufacturing apparatus for manufacturing molten iron by charging the compacted material into a melt gasifier.

The molten iron manufacturing apparatus 200 shown in FIG. 5 is a compacted material manufacturing apparatus 100 of the present invention, a crusher 40 for crushing the compacted material discharged from the compacted material manufacturing apparatus, and the compacted material crushed by the crusher 40 It includes a melt gasifier (60) to charge and melt. In addition, it may further include a reservoir 50 for temporarily storing the compacted material crushed by the crusher 40. The structure of the crusher 40 and the melt gasifier 60 will be easily understood by those skilled in the art to which the present invention pertains, and thus the detailed description thereof will be omitted.

The melt gasifier 60 is supplied with at least one coal selected from coal and coal briquettes. In general, the coal briquettes may be an example of coal having a particle size of more than 8 mm taken from the production site, and the coal briquettes may be coal formed by pressing by crushing coal having a particle size of 8 mm or less taken from the production site.

This kind of coal is charged into the melt gasifier 60 and oxygen (O ₂ ) is supplied to melt the compacted material and then discharge it to the hot water outlet. In this way, molten iron of good quality can be easily produced.

The compacted material manufacturing apparatus of the present invention includes a screw feeder equipped with one or more scrapers for removing the reduced iron-containing reducing agent attached to the inner wall of the charging hopper, thereby easily reducing the reduced iron containing reducing body attached to the inner wall of the charging hopper. Since it can be removed, there is no fear that a charging hopper may be clogged, and it can smoothly supply a reduced iron containing reducing body to a lower roll.

And since the scraping surface of the scraper is spaced at a uniform distance from the inner wall of the charging hopper and extends in the longitudinal direction of the inner wall of the charging hopper, there is no fear of contact with the charging hopper and easily reduces the reduced iron-containing reducing agent attached to the inner wall of the charging hopper. Can be removed.

In addition, since the scraping surface is spaced apart from the screw feeder to form a space between the screw feeder, the reducing iron-containing reducing agent can pass between the spaces, so that the mechanical load is not very largely applied to the screw feeder, thereby reducing the risk of failure.

Since both ends of the scraping surface are bent and fixed to the screw feeder, the scraper can be firmly fixed to the screw feeder.

Since both ends of the scraping surface are bent with curvature, the scraping performance is increased, and the possibility of contact with the inner wall of the charging hopper is reduced, thereby minimizing driving resistance.

At least one of both sides of the scraping surface is formed to be inclined in the rotational direction of the screw feeder, so that the reducing iron-containing reducing agent attached to the inner wall of the charging hopper can be more easily removed.

The scraper for removing the reduced-iron-containing reducing body attached to the inclined surface of the charging hopper is suitable for use on the inner wall of the charging hopper formed by the inclined surface because the bending lengths bent from both ends of the scraping surface and extended to the screw feeder surface are different from each other. Do.

In addition, since the screw is mounted under the central axis of the screw feeder, and a scraper having a different bending length is installed in the upper part of the screw feeder, the inner diameter is gradually reduced to discharge the high-temperature reduced-iron-containing reducing agent, so that the inclined surface of the charging hopper is formed. Suitable for inner wall structure.

The scraper includes a scraping member for removing the reduced-ring iron-containing reducing body attached to the inner wall of the charging hopper, and a pair of supporting members connected to both ends of the scraping member and fixedly mounted to the screw feeder, thereby making the assembly and assembly simple. Do.

Since the support member is screwed to the screw feeder, the assembly is easy and the assembly state is also robust.

The scraping member includes a scraping surface for removing the reduced-iron-containing reducing body attached to the inner wall of the charging hopper, and the scraping member has a structure that is bent at the scraping surface and connected to the support member, so that the structure is simple and easy to manufacture. There is one advantage.

The scraper for removing the reduced-ring iron-containing reducing agent attached to the inclined surface of the charging hopper has different bending lengths from both ends of the scraping surface to be connected to the pair of supporting members. It can be spaced at a uniform distance from the inner wall and is suitable for the removal of the reduced iron-containing reducing body.

The scraper includes a first support member attached to the screw feeder and a second support member positioned below the first support member and attached to the screw feeder, the bending length connected to the first support member being connected to the second support member. Longer than the other bending lengths connected, the reduced iron-containing reducing body attached to the inner wall of the inclined charging hopper can be efficiently removed.                     

Two or more scrapers may be mounted along the length direction of the screw feeder to increase the removal efficiency of the reduced-iron-containing reducing agent attached to the inner wall of the charging hopper.

The two or more scrapers are alternately mounted in opposite directions with the screw feeder interposed therebetween, thereby minimizing the mechanical load on the screw feeder.

Since the molten iron manufacturing apparatus of the present invention includes the compacted material manufacturing apparatus, the crusher, and the melt gasification furnace as described above, molten iron of good quality can be produced.

In addition, since at least one coal selected from the coal and coal briquettes is supplied to the melting gasifier, the finely divided coal collected at the production site can be used directly, thereby reducing production costs and having no environmental pollution.

Although the present invention has been described above, it will be readily understood by those skilled in the art that various modifications and variations are possible without departing from the spirit and scope of the claims set out below.

Claims (17)

A charge hopper into which a reduced iron-containing reducing body is charged, A screw feeder installed in the charging hopper and discharging the reduced iron-containing reducing agent flowing into the charging hopper, and equipped with at least one scraper for removing the reduced iron-containing reducing agent attached to the inner wall of the charging hopper. (screw feeder), and A pair of rolls for compressing the reduced-iron-containing reducing substance discharged from the charging hopper by the screw feeder to produce a compacted body Compacted material manufacturing apparatus comprising a. In claim 1, The scraping surface of the scraper is a compacted material manufacturing apparatus is formed to be spaced at a uniform distance from the inner wall of the charging hopper extending in the longitudinal direction of the inner wall of the charging hopper. 3. The method of claim 2, The scraping surface is spaced apart from the screw feeder, compacted material manufacturing apparatus for forming a space between the screw feeder. 3. The method of claim 2, Both ends of the scraping surface is bent and connected to the screw feeder fixed apparatus manufacturing apparatus. In claim 4, Both ends of the scraping surface is a compacted material manufacturing apparatus that is bent while having a curvature. 3. The method of claim 2, At least one of the two sides of the scraping surface is formed inclined in the direction of rotation of the screw feeder compacted material manufacturing apparatus. In claim 1, The scraper which removes the reduced-ring-iron-containing reducing body adhering to the inclined surface of the charging hopper is different from the bending lengths which are bent from both ends of the scraping surface to extend to the screw feeder surface. In claim 7, A screw is mounted below the central axis of the said screw feeder, and the compacted body manufacturing apparatus provided with the scraper from which the said bending length differs in the upper part of the said screw. In claim 1, The scraper (scraper), A scraping member for removing the reduced iron-containing reducing body attached to the inner wall of the charging hopper, and A pair of support members connected to both ends of the scraping member and fixedly mounted to the screw feeder; Compacted material manufacturing apparatus comprising a. The method of claim 9, And the support member is screw coupled to the screw feeder. The method of claim 9, The scraping member includes a scraping surface for removing the reduced iron-containing reducing body attached to the inner wall of the charging hopper, the scraping member is bent at the scraping surface is connected to the support member. In claim 11, The scraper which removes the reduced-iron-containing reducing body attached to the inclined surface of the charging hopper is different from each other in the bending length from the two ends of the scraping surface to be connected to a pair of supporting members. The method of claim 12, The scraper includes a first support member attached to the screw feeder and a second support member attached to the screw feeder while positioned below the first support member, wherein the bend length connected to the first support member is Apparatus for producing a compacted body longer than the another bend length connected to the second support member. In claim 1, At least two scrapers are mounted in the longitudinal direction of the screw feeder apparatus for producing compacted material. The method of claim 14, And at least two scrapers are alternately mounted in opposite directions with the screw feeder interposed therebetween. Apparatus for producing compacted material according to claim 1, Crusher for crushing the compacted material discharged from the compacted material manufacturing apparatus, And Melting gas furnace to charge and melt the compacted material crushed in the crusher Iron manufacturing apparatus comprising a. The method of claim 16, A molten iron manufacturing apparatus for supplying at least one coal selected from coal and coal briquettes into the melting gasifier.

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