JP2013203365A - Steel making raw material housing body - Google Patents

Abstract

The present invention provides a method for suppressing a steelmaking raw material from being slurried.
SOLUTION: A space 10 capable of storing a predetermined amount of iron making raw material, and a massive and / or granular iron making raw material accommodated in the space 10, and the space 10 contains moisture derived from the iron making raw material. It is a steelmaking raw material container in which the water absorbing material 2 which can absorb is arrange | positioned. It is an iron-making raw material container in which the water-absorbing material is disposed on a bottom surface and / or a bottom portion in the space. At the bottom in the space, a water-absorbing iron-making material layer 20 in which the water-absorbing material is dispersed on the surface of the massive and / or granular iron-making materials constituting a layer with a predetermined thickness is disposed, and on the top thereof This is an iron making raw material container in which the iron making raw material 30 is housed.
[Selection] Figure 1

Description

  The present invention relates to an iron making raw material container that suppresses slurrying of an iron making raw material due to moisture derived from the iron making raw material.

  The steelmaking raw materials are collected on bulk carriers and transported to the steelworks. During the transportation, the water contained in the steelmaking raw materials accumulates on the floor of the hold and the accumulated steelmaking raw materials are slurried. As a result, it became difficult to carry out the steelmaking raw material of the hold using a belt conveyor or the like, and the slurryed steelmaking raw material was carried out by a bucket or the like while draining. Examples of the iron-making raw material include fine iron ore having a particle size of less than about 5 mm and massive iron ore having a particle size of more than about 5 mm (see Patent Document 1).

JP 2009-280849 A

  However, carrying out while draining with a bucket or the like has a problem that it takes time and effort.

  This invention is made | formed in view of the above situation, and it aims at providing the iron-making raw material container which suppresses slurrying of an iron-making raw material resulting from the water | moisture content derived from an iron-making raw material.

  The present inventors have found that slurrying of the iron-making raw material is suppressed by arranging the water-absorbing material in a predetermined state in a space that can accommodate the iron-making raw material and the like, and have completed the present invention. Specifically, the present invention provides the following method.

(1) A steelmaking raw material container comprising a space capable of accommodating a predetermined amount of ironmaking raw material, and a massive and / or granular ironmaking raw material accommodated in the space,
A steelmaking raw material container in which a water absorbing material capable of absorbing moisture derived from the steelmaking raw material is disposed in the space.

  (2) The steelmaking raw material container according to (1), wherein the water absorbing material is disposed on a bottom surface and / or a bottom portion in the space.

  (3) A water-absorbing iron-making material layer in which the water-absorbing material is dispersed on the surface of the massive and / or granular iron-making material constituting a layer having a predetermined thickness is disposed at the bottom in the space, The iron making raw material container according to (1) or (2), wherein the iron making raw material is housed in an upper part.

  (4) The steelmaking raw material container according to any one of (1) to (3), wherein the water absorbing material is a polymer water absorbing agent.

  (5) The steelmaking raw material container according to (4), wherein 0.0002 parts by mass or more and 1 part by mass or less of the water-absorbing material is disposed with respect to 100 parts by mass of the ironmaking raw material.

  (6) The iron making raw material container according to any one of (1) to (5), which is installed in a hold for transporting the iron making raw material.

  According to the iron making raw material container of the present invention, it is possible to suppress the iron making raw material from being slurried due to the water derived from the iron making raw material.

It is a schematic process drawing which shows the manufacturing method of the iron-making raw material container in one Embodiment of this invention. FIG. 2 is an enlarged view of the vicinity of a water-absorbing iron raw material layer in FIG. It is a schematic diagram which shows the iron-making raw material container in other embodiment of this invention. It is a schematic diagram which shows the iron-making raw material container in other embodiment of this invention.

  Hereinafter, the iron raw material container in one embodiment of the present invention will be described with reference to FIG.

(Steel material container)
The iron-making raw material container 100 of the present invention includes a water-absorbing iron-making raw material layer 20 at the bottom of a space 10 that can store a predetermined amount of iron-making raw material, and a steel-making raw material layer 30 on the water-absorbing iron-making raw material layer 20. The water-absorbing iron material layer 20 includes the water-absorbing material 2 and the iron-making material (large) 3, and the iron-making material layer 30 includes the iron-making material (small) 4. In addition, the iron-making raw material (large) 3 and the iron-making raw material (small) 4 are descriptions for convenience of explanation of the present invention based on the relative sizes in the present invention, and the steel-making raw material ( (Small) 4 may be included, and the iron making raw material layer 30 does not prevent the iron making raw material (large) 3 from being included.

  The space 10 is not particularly limited as long as it can accommodate a predetermined amount of iron-making raw material. For example, the space 10 can accommodate a large amount of iron-making raw material such as a ship's hold of a steel-making raw material, a container or loading platform of a transportation vehicle, and a warehouse. It may have a space or may be a small container that accommodates a small amount of iron making raw material. Preferred are transport ship holds, containers for transport vehicles, warehouses, and the like, which are required to accommodate a large amount of steelmaking raw material, and particularly preferred are transport ship holds. The size of the space 10 is not particularly limited.

(Raw material)
The iron making raw material may be iron ore, coal, limestone, etc., and the shape of the iron making raw material is not particularly limited. For the convenience of explanation of the present invention, the iron making raw material includes an iron making raw material (large) 3 and an iron making raw material (small) 4 based on the relative size of the iron making raw material, but in the iron making raw material container 100 of the present invention, the layer 20a or The water-absorbing iron raw material layer 20 contains a lot of relatively large iron-making raw materials (large) 3, the iron-making raw material layer 30 contains a lot of relatively small iron-making raw materials (small) 4, and the layer 20a or the water-absorbing iron-making raw material layer 20 has an iron-making raw material (small). ) 4 may be included, and the ironmaking raw material layer 30 may include the ironmaking raw material (large) 3. An example of the iron making raw material (large) is the lump iron ore, and an example of the iron making raw material (small) is the fine iron ore.

(Water absorbing material)
The water-absorbing material 2 of the present invention is a material that has a high water-absorbing speed and that captures moisture in the molecular structure after water absorption and does not release water. Examples of these materials include polymer water-absorbing agents, silica gel, zeolite, activated carbon, and the like, and they can also be used as a mixture. As the water-absorbing material 2, a polymer water-absorbing agent or silica gel is preferable from the viewpoint of water-absorbing ability, and a polymer water-absorbing agent is particularly preferable.

  The polymer water-absorbing agent is not particularly limited. For example, polyacrylic acid (salt), polyacrylic acid ester, polyacrylamide, polymethacrylic acid (salt), polymethacrylic acid ester, polyalkyleneimine, polyoxyalkylene, polymalein Examples thereof include acids, copolymers of these monomers, and copolymers of these monomers with other monomers.

  Polyacrylic acid (salt) monomers include acrylic acid, sodium acrylate, potassium acrylate, ammonium acrylate, etc .; polyacrylic acid ester monomers include methyl acrylate, ethyl acrylate, acrylic acid n-propyl, n-butyl acrylate, isobutyl acrylate, hydroxyethyl acrylate, 2-ethylhexyl acrylate, etc .; as monomers of polymethacrylic acid (salt), methacrylic acid, sodium methacrylate, etc .; polymethacrylic Examples of the acid ester monomer include methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, hydroxyethyl methacrylate, 2-ethylhexyl methacrylate, etc .; single amount of polyalkyleneimine As a body, Echile Imine, methylethyleneimine, etc .; Polyoxyalkylene monomer, ethylene oxide, etc .; Other monomers include vinyl sulfonic acid, styrene sulfonic acid, acrylamide, methacrylamide, N-ethyl (meth) acrylamide, vinyl Examples include pyridine.

  The water-absorbing material 2 of the present invention is preferably a polymer water-absorbing agent or silica gel, more preferably a polymer water-absorbing agent, because of its high water absorption speed and high water-absorbing capacity. Of the polymeric water-absorbing agents, polyacrylic acid or sodium polyacrylate is preferred because of its availability and high water-absorbing ability.

  Hereafter, the manufacturing method of the iron-making raw material container of one Embodiment of this invention is demonstrated using FIG.1 and FIG.2.

  First, as shown in FIG. 1A, the iron-making raw material (large) 3 is arranged in one or more layers on the bottom surface of the space 10. The particle size of the iron-making raw material (large) 3 arranged here is not particularly limited. The thickness of the layer 20a formed of the iron-making raw material (large) 3 is derived from the moisture derived from the iron-making raw material (small) 4 of the iron-making raw material layer 30 in the upper part of the iron-making raw material container 100 or the iron-making raw material (large) 3. In order to suppress moisture and the like from accumulating in the lower part of the iron making raw material container 100, it can be appropriately selected depending on the water content of the iron making raw material. In the present invention, the bottom means a portion up to the height of the layer 20a.

  Next, as shown in FIG.1 (b), the water absorbing material 2 is spread | dispersed from the upper part of space on the surface of the layer 20a formed with the steelmaking raw material (large) 3 arrange | positioned at the bottom face of the space 10. FIG. When a certain amount of the water-absorbing material 2 is sprayed, the water-absorbing material 2 is attached around the iron-making raw material (large) 3, and the water-absorbing iron-making raw material layer 20 is formed. The method of spraying is not particularly limited, but may be sprayed manually or by a machine. By spraying the water-absorbing material 2 on the iron-making raw material (large) 3 as described above, the water-absorbing material 2 is attached to the surface of the iron-making raw material (large) 3 as shown in FIG. . In addition, you may arrange | position the water-absorbing iron raw material layer 20 after mixing the iron-making raw material (large) 3 and the water absorbing material 2 beforehand.

The amount of the water-absorbing material 2 used is not particularly limited because it depends on the water-absorbing capacity of the water-absorbing material, but it is preferably 0.1 to 500 g, more preferably 1 to 50 g, per 1 kg of water. If the water content is 1 g or less with respect to 1 kg of water, the water resulting from the iron-making raw material cannot be completely absorbed, and the slurrying of the iron-making material may not be suppressed. If the water content is 500 g or more, the water-absorbing material is excessively present. Therefore, it is not preferable from the viewpoint of the decrease in thermal efficiency and the environment in the subsequent iron making process (sintering, coke, blast furnace).
On the other hand, the usage-amount of the water absorption material 2 has preferable 0.0002 mass part or more and 1 mass part or less with respect to 100 mass parts of iron-making raw materials. In the case of 0.0002 parts by mass or less with respect to 100 parts by mass of the iron-making raw material, water due to the iron-making raw material cannot be completely absorbed and slurrying of the iron-making raw material may not be suppressed. In this case, the water-absorbing material is excessively present, which is not preferable from the viewpoint of the decrease in thermal efficiency and the environment in the subsequent iron making process (sintering, coke, blast furnace). Note that the amount of water-absorbing material used may be determined by using a part of the iron-making raw material as a sample, estimating the water content of the entire iron-making raw material, and determining the amount of water-absorbing material used based on the estimated value. Good.

  Finally, as shown in FIG. 1 (c), the iron-making raw material container 100 can be formed by forming the iron-making raw material layer 30 on the water-absorbing iron-making raw material layer 20.

  In the iron making raw material container 100 of the present invention, the water derived from the iron making raw material is absorbed by the water absorbing material 2 disposed on the bottom and / or bottom of the iron making raw material container 100, and the iron making raw material layer 30 and the water absorbing iron making raw material layer 20. Slurry of the iron-making raw material in can be suppressed.

  This is understood to be due to the following actions. In other words, in the present invention, the iron-making raw material (large) 3 is arranged so that at least a part thereof is in contact with the water-absorbing material 2. Therefore, the water-absorbing material 2 can directly absorb the water derived from the iron-making raw material from the contact point, and can suppress the diffusion of the water.

  Next, an iron making raw material container according to another embodiment of the present invention will be described with reference to FIG.

  In FIG. 3, the iron making raw material container 110 includes a space 10 in which a predetermined amount of iron making raw material can be accommodated and an iron making raw material (small) 4 accommodated in the space, and the water absorbing material 2 is disposed on the bottom surface in the space. Has been. This embodiment is different from the above embodiment in that the water absorbing material 2 is disposed on the bottom surface of the space 10. In FIG. 3, the water-absorbing material 2 and the iron making raw material (small) 4 are the same as those in the above embodiment, and the description thereof will be omitted. In this embodiment, the iron making raw material (small) 4 is the same as the iron making raw material (large) 3. A large amount may be included, and only the iron-making raw material (large) 3 may be included.

  Specifically, the water absorbing material 2 is disposed on the bottom surface of the space 10. Also in this embodiment, it sets suitably with reference to the usage-amount of the water absorbing material 2 used in the said embodiment. Finally, the iron making raw material (small) 4 is arranged on the upper surface of the water absorbing material arranged in the space 10 to form the iron making raw material container 110.

  Further, an iron making raw material container 120 according to still another embodiment of the present invention will be described with reference to FIG.

  In FIG. 4, the iron making raw material container 120 includes a space 10 in which a predetermined amount of iron making raw material can be stored and an iron making raw material (small) 4 accommodated in the space, and the surface of the iron making raw material (small) 4 absorbs water. Material 2 is arranged. This embodiment is different from the above embodiment in that the water absorbent 2 is attached to all surfaces of the steelmaking raw material (small) 4 to form the water absorbent raw material layer 40 and integrated, but the lower steelmaking raw material is different. The water absorbing material may adhere only to the surface of the surface. In FIG. 4, the water-absorbing material 2 and the iron-making raw material (small) 4 are the same as those in the above embodiment, and the description thereof is omitted. In this embodiment, the iron-making raw material (small) 4 represents the iron-making raw material (large) 3. A large amount may be included, and only the iron-making raw material (large) 3 may be included.

  Specifically, before the steelmaking raw material (small) 4 is accumulated in the space 10, it is mixed with the water absorbent 2 to form a state in which the water absorbent 2 adheres to the surface of the steelmaking raw material (small) 4. To form an iron making raw material container 120.

  A method for forming a state in which the water absorbing material 2 adheres to the surface of the iron making raw material (small) 4 is not particularly limited. For example, when the iron making raw material (small) 4 is arranged in the space 10, that is, when a predetermined amount is added. When the steel absorbent raw material (small) 4 is transported to the space 10 using the belt conveyor, it is mixed with a predetermined amount of the water absorbent 2 laid on the belt conveyor. Alternatively, by adding the water absorbing material 2 during conveyance by the belt conveyor, the water absorbing material 2 is mixed on the conveyor or at the connecting portion of the belt conveyor, and the water absorbing material 2 adheres to the surface of the steelmaking raw material (small) 4 A method of forming the above state. When using a belt conveyor, it is preferable that there is one or more connecting parts during conveyance. In addition, in the said method, it arrange | positions in the bottom face or the lower part of the space 10 by adjusting the quantity of the water absorbing material 2 spread | laid on a belt conveyor, or adjusting the timing which adds a water absorbing material to the iron-making raw material on a belt conveyor. Forming a steelmaking raw material container in which a water-absorbing material adheres only to the surface of the produced steelmaking raw material, or a steelmaking raw material container in which more water-absorbing material adheres to the surface of the steelmaking raw material in the lower part of the space 10 than in the upper steelmaking raw material You can also. Alternatively, the water absorbing material and the iron making raw material may be mixed by spreading the water absorbing material on the raw material in the iron making raw material container and mixing with a yumbo or a shovel car. Furthermore, the iron making raw material at the upper part of the iron making raw material container may be taken out, and a water absorbing material may be sprayed into the iron making raw material container and mixed with the iron making raw material at the lower part of the iron making raw material container.

  The iron-making raw material container of the present invention is not particularly limited as long as it is a place where the iron-making raw materials are accumulated, but can be used, for example, when iron-making raw materials are accumulated in a transport ship, a transport vehicle, a warehouse, or the like. By using the present invention in such a place, it is possible to suppress slurrying of the accumulated iron making raw material, and it can be mechanically conveyed by a belt conveyor or the like. Therefore, the steelmaking raw material can be transported mechanically, and for example, the berthing time of a ship can be shortened. Further, complicated operations such as slurry drying can be omitted.

  The absorbent material may be burned as it is in the iron making process, or may be used as an iron making raw material after removing the water absorbing material using a sieve or the like.

EXAMPLES Hereinafter, although this invention is demonstrated using an Example, this invention is not restrict | limited to an Example.
[Example 1]

The bottom of the acrylic cylinder with a height of 50 cm and a diameter of 5 cm with a removable lid at the top and bottom, 0.3 g of Kuriline S-200 (manufactured by Kurita Kogyo Co., Ltd.) as a water-absorbing material. I put it in. Thereafter, iron ore with a moisture content of 4% was accumulated up to a height of 40 cm of an acrylic cylinder, 100 mL of water was poured, and the upper part of the cylinder was covered. After the cylinder was allowed to stand for one month, the lower lid was opened, the lower iron ore was taken out, the appearance of the iron ore was observed, and the water content was measured.
[Example 2]

Put 0.3g of CLILINE S-200 at the bottom of the acrylic tube, and instead of accumulating iron ore up to 40cm height of the acrylic tube, place iron ore with a particle size of 5-10mm from the bottom of the tube. It was carried out in the same manner as in Example 1 except that 0.3 g of Kleline S-200 was sprayed thereon and iron ore was further accumulated up to a height of 40 cm of an acrylic cylinder.
[Example 3]

Instead of accumulating criline S-200 and iron ore in order in an acrylic cylinder, 0.3 g of criline S-200 and iron ore were mixed in advance, except that the acrylic cylinder was accumulated to a height of 40 cm. Was carried out in the same manner as in Example 1.
[Example 4]

It carried out similarly to Example 1 except having used 50g of silica gel (made by Tokai Chemical Industry Co., Ltd.) instead of using 0.3g of Kuriline S-200.
[Example 5]

Instead of putting the iron ore with a particle size of about 5 to 10 mm to a height of about 2 cm of an acrylic tube and accumulating the Kleline S-200 on the iron ore, the iron ore with a particle size of about 5 to 10 mm is placed on the acrylic tube. The same procedure as in Example 2 was performed except that 50 g of silica gel was accumulated on a height of about 5 cm.
[Example 6]

It carried out similarly to Example 3 except having used 50g of silica gel (made by Tokai Chemical Industry Co., Ltd.) instead of using 0.3g of Kuriline S-200.
[Comparative Example 1]

It was carried out in the same manner as in Example 1 except that Kuriline S-200 was not used and only iron ore having a moisture content of 4% was accumulated.
[Comparative Example 2]

  The same procedure as in Example 3 was performed, except that silica gel was not used and iron ore having a particle size of about 5 to 10 mm and iron ore having a water content of 4% were accumulated.

[Measurement method of water content]
The mass before drying of about 20 g of iron ore taken out from the bottom of the cylinder was measured, and the iron ore was dried with a dryer at 105 ° C. for 2 hours. The mass of the iron ore after drying was measured, and the water content of the iron ore before drying was calculated using the following calculation formula. In addition, it measured excluding the iron ore with a large particle size (diameter 2 mm or more).

  In Examples 1-6 and Comparative Examples 1 and 2, it was found that slurrying of the iron-making raw material can be suppressed by using the water absorbing material in a predetermined method. This is presumably because the water-absorbing material absorbed water derived from the steelmaking raw material in a timely manner.

  In Examples 1, 2, 4, and 5 and Comparative Examples 1 and 2, it was possible to suppress slurrying of the iron-making raw material by disposing the water absorbing material on the bottom surface and / or the bottom. Moreover, it turned out that the water | moisture content derived from a steelmaking raw material can reduce the water | moisture content derived from an iron-making raw material in a smaller quantity than Examples 1-4.

2 Water-absorbing material 3 Steelmaking raw material (large)
4 Steelmaking raw materials (small)
DESCRIPTION OF SYMBOLS 10 Space 20 Water-absorbing iron-making raw material layer 20a layer 30 Iron-making raw material layer 40 Steel-making raw material layer with a water-absorbing material 50 Belt conveyor 100, 110, 120 Iron-making raw material container

Claims (6)

A steelmaking raw material container comprising a space capable of containing a predetermined amount of ironmaking raw material, and a massive and / or granular ironmaking raw material housed in the space,
A steelmaking raw material container in which a water absorbing material capable of absorbing moisture derived from the steelmaking raw material is disposed in the space.   The iron-making raw material container according to claim 1, wherein the water absorbing material is disposed on a bottom surface and / or a bottom portion in the space.   A water-absorbing iron-making material layer in which the water-absorbing material is dispersed on the surface of the massive and / or granular iron-making materials constituting a layer having a predetermined thickness is disposed at the bottom in the space, The iron-making raw material container according to claim 1 or 2, wherein an iron-making raw material is housed.   The iron-making raw material container according to any one of claims 1 to 3, wherein the water-absorbing material is a polymer water-absorbing agent.   The steelmaking raw material container of Claim 4 which arrange | positions the said water absorbing material 0.0002 mass part or more and 1 mass part or less with respect to 100 mass parts of said ironmaking raw materials.   The steelmaking raw material container according to any one of claims 1 to 5, which is installed in a hold for transporting the ironmaking raw material.

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