JPH08177141A - High sound insulating partition - Google Patents

Abstract

PURPOSE: To facilitate assembly and movement and enhance the operability by filling converter wind crushed slugs as sound insulating material into a hollow panel main body provided with inlets and exhaust ports which can be opened/closed. CONSTITUTION: A hollow panel main body 1 formed out of metallic plates and plastic plates has inlets 2 formed capable of being opened/closed at its upper section, and also has exhaust ports 3 formed capable of being opened/closed at its lower section. After assembly, the upper inlets 2 are opened at a specified position, converter wind crushed slugs are filled therein so as to be made serviceable. In this case, since converter molten slugs are produced as byproducts in a process that pig iron is refined into steel by a converter at the time of iron manufacture, the aforesaid slugs are then granulated into converter wind crushed slugs 4 by high speed air current, and just then they can be effectively used as sound insulating material to be filled in the hollow section. Furthermore, a surface density is increased by filling the slugs into the hollow panel main body 1, sound insulating properties is thereby enhanced much more. Besides, when the hollow panel main body is recombined or moved to other places, the slugs 4 are exhausted with the lower exhaust ports opened so as to allow the panel main body to be lightened, and its recombination and movement can thereby be made more easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a partition for partitioning an office space such as an office, which is easy to move and has excellent sound insulation.

[0002]

2. Description of the Related Art Recently, in order to freely partition a living space of an office or the like, an increasing number of cases are equipped with a partition that is movable with casters, or a partition that can be easily assembled and reassembled.

These partitions are designed to have a light weight in order to facilitate movement and assembly, and are made of glass as a panel, and a panel is assembled with a metal plate such as a steel plate or a plastic plate to form a hollow structure. Or a hollow part filled with lightweight glass wool, or a so-called sound-insulating sheet in which a high specific gravity substance such as polyvinyl chloride is mixed is attached to both sides of the panel.

Further, in Japanese Patent Laid-Open No. 4-176939, in order to improve sound insulation and fire protection and facilitate movement and transportation, sand or oxide powder or industrial waste having a larger specific gravity than the inlet before use. Disclosed is a movable partition wall which is filled with powder or granules such as objects or a mixture of the powder and granules and water, and removes the packing from a discharge port during movement or assembly.

[0005]

As described above, the current partition is light in weight in order to facilitate movement and assembly. Therefore, although the visual field shielding function required of the partition is sufficient, the sound shielding function is not sufficiently satisfactory.

The sound shielding performance, that is, the sound insulation performance is generally determined by the mass law, and when the incident wave is a random incident wave, it can be estimated by the following equation. TL = 18 · log (f · M) −44 where TL; transmission loss (dB), f; frequency (H
z), M: Area density (kg / m ² ) is shown.

That is, the sound transmission loss increases as the surface density increases, and the weight of the partition may be increased to improve the sound insulation performance. However, making the partition heavy causes a problem that it is difficult to move, assemble, and rearrange it.

The above-mentioned Japanese Patent Laid-Open No. 4-176939 is an excellent invention which improves the sound insulation performance during use and facilitates movement, assembly and reassembly. However, regarding the powder and granules to be filled in the hollow part, it is only described as sand or oxide powder or industrial waste with a large specific gravity, etc., and their specific characteristics such as shape, particle size and specific gravity are not described. Not not.

Further, it is expected that it will be difficult to completely fill and discharge the hollow panel with powder and granules with only one injection and discharge port, and no solution to this problem is described.

Further, regarding the mixing of the powder and granules,
Although it is possible to improve fire protection, it is necessary to consider water leakage and corrosion, and it is expected that handling of the extracted mixture will be difficult.

It is also expected that the powder and granules are separated from the water after the injection, and the upper part is only water, and the particles are not uniformly filled. An object of the present invention is to provide a partition in which powder particles can be easily injected as a sound insulating material for enhancing sound insulation and the particles can be easily discharged for weight reduction during transportation and transportation.

[0012]

The high sound-insulating partition of the present invention is a partition in which a hollow panel body having an openable inlet and a discharge outlet is filled with a sound insulating material, and a converter furnace wind is used as the sound insulating material. It is characterized by using crushed slag.

As a result of earnest studies, the inventors of the present invention granulated converter molten slag, which is a by-product in the process of refining pig iron into steel in a converter in an iron manufacturing process, by granulating with a high-speed air stream. They have found that slag is effective as a sound insulating material to fill the hollow part of the partition, and have completed the present invention.

The converter slag produced as a by-product in the steelmaking process is granulated by the converter slag which is discharged and cooled by spraying the molten slag to a treatment place called a field by the treatment method and the high-speed air flow used in the present invention. Although it can be divided into converter-furnace slag, etc., the majority is converter slowly-cooled slag.

At present, 90% or more recycling of converter slag has been achieved. However, land reclamation materials such as landfill,
It is often used for revetment backfill material, temporary roadbed material for landfills, etc., so it cannot be said that it has been used effectively enough.

Further, the slow-cooled converter slag contains a small amount of free lime as well as changes in chemical composition and physical properties. Therefore, when it comes into contact with water, there is a risk that it will collapse due to expansion when changing to slaked lime. are doing. Therefore, in order to prevent the expansion and collapse phenomenon, it is inevitable to pile up and stabilize it for a long period of several months to a year, which is a problem for resource utilization.

On the other hand, the converter blast slag was developed in order to solve the above-described problem of resource recovery, and is intended to recover heat as well as to recover resource. That is, the converter slag has a heat of heat of about 400,000 kcal / t in a molten state. The radiant heat when the converter molten slag is granulated with a high-speed airflow and the conductive heat in the recovery unit are recovered as steam. We also dry mill scales using the heat of exhaust air.

When granulated by a high-speed airflow, the converter blast slag does not cause expansion and collapse phenomena unlike the converter slowly cooled slag because free lime is stabilized as calcium ferrite.

Furthermore, in addition to the characteristics such as spherical shape, high specific gravity, and high hardness, it is relatively inexpensive because it is a by-product. The present inventors have paid attention to these characteristics and confirmed that the sound insulation is enhanced by filling a hollow partition, and have completed the present invention.

[0020]

As described above, the converter blast slag does not cause the expansion and collapse phenomenon. Further, by injecting the converter blast slag into the hollow panel body, the areal density can be increased and the sound insulation performance can be improved. Further, the converter blast slag has a spherical shape and has high fluidity, and can be easily injected into and discharged from the hollow panel body.

[0021]

1 is an explanatory view showing an embodiment of a hollow panel body 1 of the present invention. The hollow panel body 1 is made of, for example, a metal plate such as a steel plate or a plastic plate. Further, an openable and closable inlet 2 is provided at the upper part, and an openable and closable outlet port 3 is provided at the lower part, and in this example, the number is 3, respectively.

The partition of the present invention is used after the assembly is completed or after it is moved to a predetermined position, the upper inlet 2 is opened and the converter blast slag 4 is injected.
Also, when rearranging or moving to another position, the lower outlet 3
By opening and opening the converter blast slag 4, the weight is reduced, and the rearrangement and movement are facilitated.

An apparatus for producing converter blast slag used in the present invention is disclosed in, for example, Japanese Utility Model Publication No. 58-6496. Table 1 shows examples of chemical components and examples of main physical properties of the powder obtained by classifying the particle size of the converter blast slag to 3.0 mm or less.

[0024]

[Table 1]

[0025]

[Table 2]

The converter blast slag is spherical with a particle size of 3.0 mm or less, and has an angle of repose of 12 to 16 °, which is excellent in fluidity. Therefore, injection from the upper part of the partition and discharge from the lower part can be easily performed. Therefore, the assembly and the moving installation can be easily performed in a lightweight state.

The converter blast slag has an absolute dry specific gravity of 3.
4-3.7, unit volume mass is 2.1-2.4 kg / l, which is about 1.5 times larger than aggregates such as river sand, sea sand and crushed sand. Therefore, if this is injected, the surface density of the partition can be increased, and the sound insulation can be improved.

The particle size of the converter blast slag is preferably 3.0 mm or less because of high sphericity. If it exceeds 3 mm, flat flakes and the like are present, which is not preferable. On the other hand, there is no micron-order fine powder in the converter blast slag and there is no risk of destruction by injection, so it is not necessary to cut the fine powder portion as a dust countermeasure.

Next, the hollow partition body 1 can be manufactured by using a metal plate such as a steel plate, a plastic plate or the like and two or more materials thereof. It is desirable that the surface be painted or cross-tightened so as to improve the design and prevent a loud noise from being generated when an object hits the partition.

If the surface density related to sound insulation becomes unnecessarily high due to the injection of the converter air-blast slag, two partition plates are put and injected only in the hollow portions on both sides, and the central portion is made hollow. You can leave it.

Alternatively, a lightweight material having a small specific gravity and a high sphericity, for example, obsidian, pearlite perlite lightweight aggregate, fly ash, red mud, waste glass, or other waste material that is granulated, fired, or foamed to produce lightweight bone. The surface density may be adjusted by using a material or the like together.

If the side plates of the partition are likely to swell due to the injection of converter blast slag, it is advisable to reinforce the side plates with braces or the like. In the above example, the material to be injected was the converter air-blasted slag, but it is a by-product during the production of ferroalloy such as electric furnace slag, ferro-nickel, and ferrochrome, which is a by-product when refining scrap into steel in an electric furnace. Sphericalized ferroalloy slag has the same properties as converter blast slag,
It can be used similarly.

Specific examples will be described below. Example 1 In order to check the filling properties of converter blast slag, a panel with a width of 900 mm, a height of 1800 mm and a hollow portion thickness of 50 mm was prepared using a transparent acrylic plate, and a panel having a width of 3 There are three inlets and three outlets at the bottom.

First, the converter blast slag was injected from the three injection ports in the upper part of the produced panel, and the injection state into the hollow part of the panel was observed. The converter blast slag had good fluidity and could be smoothly injected through the three inlets.

Next, the discharge situation was observed. The discharge was performed by opening the three discharge ports at the bottom and extracting the converter blast slag into a bag. The discharge condition of the converter blast slag was good, and almost the entire amount could be extracted.

No particular generation of dust was observed during injection and discharge. Further, no breakage of converter blast slag was particularly observed. Example 2 A panel having a width of 900 mm, a height of 1800 mm, and a hollow portion having a thickness of 50 mm was prepared from a steel plate having a thickness of 1.2 mm.

As an example of the present invention, two panels, that is, one in which the converter air-blasted slag was injected into the hollow portion and the other in which it was not injected were prepared as comparative examples, and the sound insulation was evaluated. Sound insulation is
The measurement was performed according to JIS A1416 "Method for measuring sound transmission loss in laboratory".

It should be noted that the one in which the converter blast slag was injected had an areal density of about 120 kg / m ² , and the one not injected had an areal density of about 1.
It was 8 kg / m ² . Table 3 shows the measurement results of the sound transmission loss.

[0039]

[Table 3] It is clear that the inventive example in which the converter blast slag was injected exhibited higher sound transmission loss than the comparative example, and was excellent in sound insulation.

[0040]

INDUSTRIAL APPLICABILITY By injecting a converter blast slag having a large specific gravity, a partition having high sound insulation during use can be obtained. Also, converter blast slag is
It has good fluidity and can be injected and discharged smoothly. As a result, when assembling and moving the partition, the converter blast slag can be taken out in a lightweight state.

Further, the present invention can increase the effective utilization rate of the converter slag which has not been sufficiently utilized conventionally, and the increase of the production amount of the converter air-blasted slag means that the heat recovery increases. It also leads to energy saving, and its industrial significance is great.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a partition of the present invention.

[Explanation of symbols]

1 ... Hollow panel body, 2 ... Injection port, 3 ... Discharge port, 4 ... Converter blast slag.

Claims (1)

[Claims] 1. A partition made by filling a sound insulation material into a hollow panel body having an inlet and a discharge opening that can be opened and closed, and uses a converter blast slag as the sound insulation material. partition.