KR101036642B1 - 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 article manufacturing apparatus of the present invention is a pair of rolls for compressing the reduced iron-containing reducing body to produce a compacted body, a roll support device for supporting any one of the pair of rolls, and fixed around the roll The roll supporting apparatus hydraulically supports the bearing block provided in the side surface of a roll, and is rotatable about the hinge attached to the frame member located in the direction in which the bearing block is supported, and it is rotatable. Through the present invention as described above, a compacted material having good quality can be produced.

Compacted material manufacturing device, molten iron manufacturing device, jack cylinder, support device

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.

2 is a schematic partial perspective view of a roll supporting apparatus according to an embodiment of the present invention.

3 is a schematic plan view of a roll supporting apparatus according to an embodiment of the present invention as viewed in the direction B of FIG. 2.

4 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, steel mills around the world directly use ordinary coal as fuel and reducing agent, and as a source of iron, melting molten iron is manufactured by directly using spectroscopy which occupies 80% or more of the world's ore production. A great deal of effort has been put into the development of the reduced 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 briquetting reduced-reduced iron and subsidiary materials and charging them into a melt 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, by using a pair of rolls including a fixed roll and a variable roll, the powdered reducing iron is molded to be suitable for long-distance transportation, and then cooled to prepare a sponge iron briquette. In particular, as a large amount of powdered reduced iron is charged between the rolls, the variable roll is pushed and the facility is overloaded, so that the rear end of the variable roll is supported by a roll supporting device in order to protect the facility and maintain the compression force of the reduced or reduced iron. However, in the case of such a roll support device, the roll support device is combined with various internal parts of the compacted material manufacturing device, and thus the roll support device is not easy to be disassembled and maintained.

In particular, in the case of a large compacted material manufacturing apparatus, since a large amount of reduced iron is continuously introduced between the rolls, in order to continuously manufacture a strip having a constant thickness, the roll supporting apparatus is not only necessary, but the necessity of maintenance is increased and dismantled. And there is a need for easier maintenance.

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 article manufacturing apparatus of the present invention comprises a pair of rolls for compressing a reduced-ring iron-containing reducing body to produce compacted compacts, a roll supporting apparatus for supporting one of a pair of rolls, and And a frame member fixedly installed around the roll, the roll supporting device hydraulically supporting a bearing block installed on the side of the roll along the axial direction of the roll, and positioned in a direction in which the bearing block is supported. The hinge attached to the frame member can be rotated about its axis.

Here, the hinge is attached to the frame member in the vertical direction, so that the roll support device can be rotated on the horizontal plane.

The roll support is also rotatable to the outer side of the roll.

And it is preferable that the maximum rotation angle of the roll support apparatus is substantially right angle.

The roll support device may be located adjacent to each other between the frame member and the bearing block.

In addition, the roll supporting apparatus includes two jack cylinders which are hydraulically driven vertically disposed in the bearing block, and preferably convexly forms an end portion of the jack cylinder in contact with the bearing block.

The roll support device is hinged and rotatably fixed to the frame member by being connected to the support member and the support member surrounding the outer circumference of the jack cylinder, and two jack cylinders which are hydraulically driven up and down on the bearing block. And a support plate which is screwed onto and fixed to the frame member between the support member and the support member.

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 4. 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 article manufacturing apparatus according to an embodiment of the present invention, a pair of charging hopper 10 and a pair of rolls (including a gear attached to the end of the roll) 20 The compacted object manufacturing apparatus 100 containing these 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. In particular, the reduced-ring iron-containing reducing agent may be introduced into the pair of rolls 20 in various forms other than the charging hopper 10.

Through the opening 16 located in the center of the pair of charging hoppers 10 shown in FIG. 1, a reducing body containing a branched iron is charged in the direction indicated by the 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 in close contact with the cheek plate (not shown).

Inside each charging hopper 10 is provided a screw feeder 12 for discharging the reduced iron-containing reducing agent 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. In particular, the first roll of the pair of rolls 20 is a moving roll that rotates by hydraulic pressure, the second roll is a fixed roll (fixed roll). The variable roll is supported by a roll supporting device having a jack cylinder to maintain a constant gap by back and forth when the roll gap is pushed due to overload. Hereinafter, a roll supporting apparatus according to an embodiment of the present invention will be described in detail with reference to FIG. 2.

2 is a schematic partial perspective view of a roll supporting apparatus 120 according to an embodiment of the present invention, which is positioned adjacent to each other between the frame member 130 and the bearing block 28. 120 is shown.

As shown in FIG. 2, the roll support device 120 supports any roll 201, which is a variable roll, among a pair of rolls of a compacted body manufacturing apparatus, which is a bearing block 28 located on the side of the roll 201. ) Is achieved by supporting. Since the roll 201 and the bearing block 28 are coaxially connected by the rotor 29 (shown in FIG. 3), the roll 201 can be supported by supporting the bearing block 28. The roll support device 120 may be attached to the frame member 130 positioned in the direction in which the bearing block 28 is supported and rotate.

As shown in FIG. 2, the roll support device 120 includes two jack cylinders 122, a support member 126, and a support plate 129. Although not shown in FIG. 2, the hydraulic supply device is installed to supply oil to the two jack cylinders 122 for hydraulic operation.

Two hydraulically driven jack cylinders 122 are disposed up and down on the bearing block 28 to pressurize the bearing block 28, so that a large amount of reducing material flows between the rolls and protects the equipment by back and forth when an overload occurs. Maintain a constant gap.

In order to fix the two jack cylinder 122 together, the support member 126 surrounding the outer circumference of the jack cylinder 122 is installed. The support member 126 is positioned between the frame member 130 and the bearing block 28 to securely support the jack cylinder 122.

The support plate 129 is connected to the support member 126 and is rotatably fixed to the hinge 124 on the frame member 130. Therefore, during maintenance, the roll support device 120 can be easily separated from the compacted material manufacturing device. On the contrary, in the manufacture of the compacted body, since the support plate 129 is fixed and does not move, the support plate 129 is fixed by screwing onto the frame member 130 between the hinge 124 and the support member 126. do. Screw fastening holes 128 are formed in the frame member 130 for screw fastening, and the fixing member 1283 is fastened by fastening the screws 1281 on the frame member 130.

Hinge 124 is attached to the frame member 130 in the vertical direction to rotate the roll support device 120 on a horizontal plane. Hereinafter, a method of disassembling the roll supporting device 120 by the hinge 124 will be described in detail with reference to FIG. 3.

FIG. 3 is a schematic plan view of the roll supporting apparatus 120 according to the embodiment of the present invention as viewed in the direction B of FIG. 2, illustrating a dismantling process of the roll supporting apparatus 120 during dismantling for maintenance.

As shown in FIG. 3, the screw 1281 is removed from the screw fastening hole 128, and then the fixing member 1283 is removed. Thereby, the support plate 129 can be moved freely. Accordingly, the roll supporting device 120 can be rotated to the outer side of the roll 201 with the hinge 124 attached to the frame member 130 as an axis. As such, the state in which the roll supporting device 120 is rotated is indicated by a dotted line. In this case, since the maximum rotation angle of the roll support device 120 is substantially right angle, the roll support device 120 thus removed can be easily dismantled or serviced from the outer side of the roll 201. Here, the angle of rotation may be right angle or close to right angle.

On the other hand, the end of the jack cylinder 122 in contact with the bearing block 28 is formed convex, so that the jack cylinder 122 is well aligned by the mechanical vibration caused by the drive of the compacted material manufacturing apparatus.

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

4 is a view schematically showing a molten iron manufacturing apparatus using a compacted material manufacturing apparatus according to an embodiment of the present invention, it shows 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. 4 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.

Since the roll supporting apparatus is rotatable attached to the frame member located in the direction in which the bearing block is supported, the roll supporting apparatus is easily dismantled, thereby reducing maintenance time and ultimately improving process efficiency.

The hinge is attached to the frame member in the vertical direction and rotates the roll supporting apparatus on the horizontal plane, so that the work can be easily performed without requiring a large force.

The roll supporting device is rotatable to the outer side of the roll, so that the work is made on the outer side of the roll, so that a work space can be secured, so that the work is convenient.

Further, since the maximum rotation angle of the roll support device is substantially right angle, the roll support device can be rotated sufficiently to perform work.

Since the roll supporting device is located adjacent to each other between the frame member and the bearing block, the roll supporting device can be used without additional devices, thereby reducing the number of parts, thereby reducing the cost of equipment.

In addition, since the roll supporting device convexly forms an end portion of the jack cylinder in contact with the bearing block, alignment is easy even when the compacted material manufacturing apparatus is shaken by mechanical vibration.                     

The roll support device is connected to the two jack cylinders hydraulically driven up and down on the bearing block, a support member surrounding the outer circumference of the jack cylinder, and a support member to be rotatably fixed to the frame member by a hinge. Since the support plate is screwed on the frame member between the support member and fixed to the frame member, the support plate is firmly structured so that the safety of operation can be ensured during the operation of the compacted material manufacturing apparatus and the roll support apparatus can be easily maintained during maintenance. Since it can be dismantled, there is an advantage in that the overall productivity is improved by reducing the tack time.

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 (9)

A pair of rolls for compressing the reducing iron-containing reducing body to produce compacted material, A roll support device for supporting any one of the pair of rolls, and Frame member fixedly installed around the roll Including; The roll supporting device hydraulically supports a bearing block installed on the side of the roll along the axial direction of the roll, and includes a hinge attached to a frame member located in a direction in which the bearing block is supported. A compacted body manufacturing apparatus which can rotate about an axis. In claim 1, And the hinge is attached to the frame member in the vertical direction to rotate the roll supporting apparatus on a horizontal plane. 3. The method of claim 2, The roll support device is a compacted material manufacturing apparatus rotatable to the outer side of the roll. In claim 1, The roll angle of the roll support device is a compacted material manufacturing apparatus whose maximum value is substantially perpendicular. In claim 1, The roll support device is a compacted material manufacturing apparatus located adjacent to each other between the frame member and the bearing block. In claim 1, The roll supporting apparatus includes two jack cylinders disposed up and down in the bearing block to be hydraulically driven, and convexly formed an end portion of the jack cylinder in contact with the bearing block. In claim 1, The roll support device, Two jack cylinders which are hydraulically driven by vertically arranged in the bearing block, A support member surrounding the outer circumference of the jack cylinder, and A support plate connected to the support member to be rotatably fixed to the frame member by a hinge and screwed onto the frame member between the hinge and the support member. Compacted material manufacturing apparatus comprising a. 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. In claim 8, A molten iron manufacturing apparatus for supplying at least one coal selected from lump coal and coal briquettes into the melting gasifier.

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