JP2001319805A - Material with magnetic permeability and shielding properties against radiation and electromagnetic wave - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic permeable material which has permeability and shielding properties against radiation and electromagnetic wave and can shield electromagnetic waves and radiation and to which various things can be fixed with magnets. SOLUTION: This material with shielding properties against radiation and electromagnetic wave shielding and magnetic permeability is manufactured by adding granulated oxidized electric furnace slag to a resin material or bituminous. The oxidized electric furnace slag is manufactured by forcibly oxidizing the melt of electronic furnace slag by blowing air or oxygen into the melt, after such a component that improves the radiation and electromagnetic wave shielding properties is added to the melt and then solidifying the melt by cooling. When this magnetica permeable material is formed in a sheet 11 and wall paper 12 is backed with the sheet 1, an ornament 14, etc., can be fixed to a wall 13 with a magnet 15 and, in addition, electromagnetic waves and radiation can be shielded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetically permeable material which is magnetically permeable, magnetizable, and has a shielding property against radiation and electromagnetic waves.

[0002]

2. Description of the Related Art Conventionally, for example, a white board or the like is provided with magnetic permeability by stretching an iron plate on the back side.

[0003]

However, the above structure is inflexible, complicated in structure, and heavy in weight, making it inconvenient to handle.

[0004]

According to the present invention, as a means for solving the above-mentioned problems, a component for improving magnetic permeability, radiation and electromagnetic wave shielding properties is added to an electric furnace oxidized slag melt, and then air or slag is added. Provided is a magnetically permeable, radiation and electromagnetic wave shielding material comprising a granulated product of an electric furnace oxidized slag obtained by subjecting to forced oxidizing treatment by blowing oxygen and then quenched and solidified, and a resin material and / or bituminous material. Things. The electric furnace oxidized slag granulated material has fine irregularities on the surface and has a substantially spherical hollow structure or has a hollow structure, or the electric furnace oxidized slag granulated material has fine irregularities on its surface and is angular. Including those having different shapes. The present invention will be described in detail below.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION [Electric Furnace Oxidized Slag] The electric furnace oxidized slag referred to in the present invention usually contains 10 to 26% by weight of CaO.
Si O ₂ 8 to 22 wt%, Mn O4~7 wt%, Mg O
2-8 wt%, Fe O13~32 wt%, Fe ₂ O ₃ 9~
45% by weight, Al ₂ O ₃ 4 to 16% by weight, Cr ₂ O ₃ 1 to 4
Weight percent, and as a trace component, TiO ₂ 0.25
0.70 wt%, P ₂ O ₅ 0.15 to 0.50 wt%, including about S0.005~0.085 wt%, including about 20 to 45 wt% of Fe to obtain a stable mineral composition It does not contain any clay, organic impurities, and salts contained in natural aggregate components, and contains almost no unstable free lime, free magnesia or minerals.

[Production of Fine Aggregate] As one method for producing the above-mentioned granulated product of the electric furnace oxidized slag, iron, Ba, Si, desirably iron scrap, BaO scrap, Permeability of SiO ₂ type brick waste, waste sand, etc.
A component for improving radiation and electromagnetic wave shielding properties is added, and air or oxygen is further blown to perform a forced oxidation treatment, and such an electric furnace oxidized slag melt is injected into a high-speed rotating bladed drum. A method is employed in which the melt is crushed and granulated by the bladed drum, and the granulated melt is rapidly cooled and solidified in a water mist atmosphere. A plurality of the bladed drums may be arranged to perform crushing and granulation in a plurality of stages. The granulated product of the electric furnace oxidized slag thus obtained is usually classified as fine aggregate having a particle size of 5 mm or less, and those having a particle size of 2.5 mm or less are substantially spherical, and have a specific gravity of 3.3 to less.
In the range of 3.8, there are no defects such as cracks on the surface, the surface has fine irregularities, and it has a hollow structure or includes a hollow structure. And the particle size distribution is J
It is within the standard range of IS-A5005 crushed sand for concrete.

[0007] Another method for producing an electric furnace oxidized slag granulated product is as follows: an electric furnace oxidized slag melt obtained by adding a component for improving the above magnetic permeability, radiation and electromagnetic wave shielding properties, and performing a forced oxidation treatment. Thickness 2 in a heat-resistant container
A method is employed in which the water is discharged at a diameter of 0 mm or less, sprayed with water, solidified rapidly, and then pulverized and classified. The granulated electric furnace slag obtained by this method has an angular shape with fine irregularities on the surface.

[Third component] Other than the above-mentioned granulated surface electric furnace oxidized slag and resin material and / or bituminous material, the magnetically permeable material of the present invention includes, for example, calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfate, calcium sulfite. , Calcium phosphate, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, magnesium oxide, titanium oxide, iron oxide, zinc oxide, alumina, silica, diatomaceous earth, dolomite, gypsum, talc, clay, asbestos,
Inorganic fillers such as mica, glass fiber, calcium silicate, bentonite, white carbon, carbon black, iron powder, aluminum powder, stone powder, blast furnace slag, fly ash, cement, zirconia powder, and natural fibers such as cotton, hemp, and wool , Polyamide fibers, polyester fibers, acrylic fibers, viscose fibers, acetate fibers, organic synthetic fibers such as vinyl chloride fibers and vinylidene chloride fibers, asbestos fibers, glass fibers, carbon fibers, ceramic fibers, metal fibers, and inorganic fibers such as whiskers. , Linter, linen,
Organic fillers such as sisal, wood flour, coconut flour, walnut flour, starch, flour, etc., as well as flame retardants, antioxidants, ultraviolet absorbers, antistatics, crystallization promoters, foaming agents, dyes, pigments, etc. A third component such as a colorant, a plasticizer such as DOP or DBP may be added.

[Resin Material] As the resin material used in the present invention, for example, thermoplastic resin, thermosetting resin, rubber,
Elastomers and the like. As the thermoplastic resin, for example, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-propylene terpolymer, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, fluororesin, heat Plastic acrylic resin, thermoplastic polyester,
There are thermoplastic polyamide, thermoplastic urethane resin, etc.
Examples of the thermosetting resin include a urethane resin, a melamine resin, a thermosetting acrylic resin, a urea resin, a phenol resin, an epoxy resin, and a thermosetting polyester.Examples of the rubber include acrylic rubber, butyl rubber, silicon rubber, Urethane rubber, fluoride rubber, polysulfide rubber, graft rubber, butadiene rubber, isoprene rubber,
Chloroprene rubber, polyisobutylene rubber, polybutene rubber, silicone rubber, isobutene-isoprene rubber, acrylate-butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, pyridine-butadiene rubber, styrene-isoprene rubber, acrylonitrile-chloroprene rubber, styrene- Synthetic rubbers and natural rubbers such as chloroprene rubber, acrylonitrile-butadiene copolymer, styrene-butadiene copolymer, acrylonitrile-butadiene-styrene copolymer, and the like. Examples of the elastomer include styrene-butadiene-styrene (SBS) copolymer. Styrene-based thermoplastic elastomers such as coalesced copolymers, styrene-isoprene-styrene (SIS) copolymers, styrene-ethylene butadiene-styrene (SEBS) copolymers Over and butadiene - styrene Proc copolymer, styrene - there are block copolymers such as styrene copolymer - rubber midblock. The resin material is 2
A mixture of two or more species may be used.

[Bitumen] The bituminous material used in the present invention includes, for example, straight asphalt, bron asphalt, tar, pitch and the like. The bituminous material may be mixed with the above resin material.

[Magnetic permeable material] The mixing ratio of the above-mentioned granulated electric furnace oxidized slag and the above-mentioned resin material and / or bituminous material is usually a weight ratio of the resinous material and / or bituminous material.
Electric furnace oxidized slag granules based on 00 parts by weight) 50 to 5
50 parts by weight. If the addition amount of the electric furnace oxidized slag granules is below the above range, sufficient magnetic permeability cannot be obtained,
If the ratio exceeds the above range, the moldability is reduced and the mechanical strength of the molded product is also reduced.

[Operation] The electric furnace oxidized slag granules have a substantially spherical or angular shape, and have fine irregularities on the surface.
The resin material and / or bitumin has an extremely good dispersibility and adhesion with the resin material and / or bitumin due to an anchoring effect of biting into the unevenness. Therefore, the electric furnace oxidized slag can be added in a large amount to the resin material and / or bituminous material, and a material having high magnetic permeability, radiation and electromagnetic wave shielding properties can be obtained. Further, the magnetically permeable material has a vibration-proof property and a sound-insulating property due to its large weight. Furthermore, in the case of granulated electric furnace oxidized slag having a substantially spherical shape, the obtained magnetically permeable material has a good flowability of the melt, and therefore has excellent moldability, and is determined by injection molding, extrusion molding, press molding, roll press molding, or the like. Is obtained accurately, and there is no occurrence of defects such as sink marks and burrows. Since electric furnace oxidized slag granules are obtained from electric furnace oxidized slag, a by-product generated in the steelmaking process,
There is no problem in terms of resources, and the electric furnace oxidized slag can be used effectively.

Embodiment 1 [Production of Spherical Fine Aggregate] FIG. 1 shows an apparatus for producing fine aggregate of the present invention. That is, a melt of an electric furnace oxidized slag at about 1500 ° C. was charged into a forced oxidation treatment tank, 33 wt% of iron scrap was added to the melt of the electric furnace oxidized slag, and forced air treatment was performed by blowing air. The electric furnace oxidized slag melt (1) is transferred from the ladle (2) to the shooter (3), and injected from the shooter (3) into the high-speed rotating bladed drums (4, 5). The steelmaking slag melt (1) is
The granulated material (8) of the melt of the electric furnace oxidized slag is quenched by a water mist sprayed from a spray device (7) into a quench chamber (6). The granulated electric furnace slag (8) thus obtained is stored in the storage container (9).

The granulated product of the electric furnace oxidized slag (8) is substantially spherical, has no defects such as cracks on the surface, has fine irregularities, has high hardness (about 7 in Mohs hardness) and has abrasion resistance. Excellent specificity, true specific gravity is 4.50, absolute dry specific gravity is 4.30,
Fire resistance is 1100 ° C, magnetic permeability, electrical insulation, acid resistance,
Also excellent in alkali resistance and the like. FIG. 2 shows the particle size distribution of the granulated product of the electric furnace oxidized slag (8). In FIG. 2, the solid line graph is the particle size distribution of the aggregate (8) of the present invention, and the dotted line graph is JI.
S-A5005 shows the standard range of fine aggregate for concrete, and it is recognized that the fine aggregate (8) is within the standard range.

[Example 2] (Production of square aggregated fine aggregate) An electric furnace oxidized slag at about 1500 ° C is filled in a forced oxidation treatment tank, and BaO waste 20% by weight is added thereto, and air is further blown therein. For forced oxidation. The melt of the electric furnace oxidized slag was discharged into a rectangular box-shaped container at a thickness of 15 cm, and was rapidly cooled and solidified by water spray. The solidified product was pulverized by a pulverizer and classified to obtain a granulated electric furnace oxidized slag having fine irregularities on its surface and having a square shape (a sieve having a nominal size of 0.3 mm). Hardness, specific gravity of the electric furnace oxidized slag granules,
Other properties are substantially the same as those of the first embodiment. Table 1 shows the magnetic permeability of the fine aggregates of Examples 1 and 2.

[0016]

[Table 1]

Example 3 100 parts by weight of a polyethylene melt were mixed with 300 parts by weight of the granulated product of the electric furnace oxidized slag of Example 1 (a sieve having a nominal size of 0.3 mm), and the mixture was calendered with a calender roll. Form into sheets. FIG.
The sheet (11) is thermally bonded to the back of the wallpaper (12) as shown in FIG. The wall (13) covered with the wallpaper (12) has a magnetic adhesion property, and FIG.
As shown in the figure, the memo, the ornament (14) and the like can be fixed to the wall (13) by the magnet (15). The wall (13) is
Shows radiation and electromagnetic wave shielding, and has excellent vibration damping and sound insulation.

Example 4 A granulated product of the electric furnace oxidized slag of Example 2 was added to a melt of 100 parts by weight of polyethylene.
Parts by weight are mixed, and the mixture is extruded from a T-die by an extruder to form a sheet and pressed against the back surface of the floor material. As shown in FIG. 5, such a floor material (16) has magnetic adhesion by the sheet (17), and a carpet or the like can be fixed by a magnet to prevent displacement. In this case, FIG. As shown, a sheet-like plastic magnet (19) is desirably attached to the back surface of the carpet (18). The flooring (1
6) shows radiation and electromagnetic wave shielding properties, and is also excellent in vibration suppression and sound insulation.

Example 5 Styrene butadiene rubber:
400 parts by weight of the electric furnace oxidized slag of Example 1 is mixed with 100 parts by weight of the mixture of the straight asphalt 6: 4 weight ratio mixture, and the mixture is formed into a sheet by a calender roll. Since the sheet (20) has magnetic permeability, FIG.
For example, as shown in (1), it is attached to the back of a carpet (21) for a floor mat of an automobile. The carpet (21) is laid on an automobile floor (22), and a heel mat (24) having a plastic magnet sheet (23) adhered to the back thereof is placed on the carpet (22).
(23) is fixed to the carpet (21) by a plastic magnet sheet (23). The sheet (20) further exhibits radiation and electromagnetic wave shielding properties and is excellent in vibration damping and sound insulation.

Example 6 250 parts by weight of an electric furnace oxidized slag were mixed with 100 parts by weight of polyvinyl chloride, melted by an extruder, extruded into a string and cut by a pelletizer to produce pellets for injection molding. I do. Using the pellets, a cabinet (25) as shown in FIG. 8 is injection-molded. The cabinet (25) has a magnetic adhesion property, and for example, a memo (26) or the like is fixed to a side surface with a magnet (27). Can be kept. Furthermore, when there is a source of noise or vibration in the cabinet (25), noise or vibration leaking from the source to the outside can be reduced, and when there is a source of electromagnetic wave or radiation, electromagnetic wave or radiation Leakage to the outside can be suppressed.

[0021]

Since the magnetically permeable material of the present invention has magnetic adhesion, radiation and electromagnetic wave shielding properties, memos, ornaments and the like can be fixed to a sheet or molded article made of the material with a magnet. The sheet or molded article also has radiation and electromagnetic wave shielding, vibration and sound insulation.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an aggregate manufacturing apparatus.

FIG. 2 is a graph showing the particle size distribution of aggregate.

FIG. 3 is a sectional side view of the wallpaper of the first embodiment.

FIG. 4 is a partial perspective view of a wallpapered wall according to the first embodiment.

FIG. 5 is a side sectional view of a floor material according to a second embodiment.

FIG. 6 is a back view of the carpet according to the second embodiment.

FIG. 7 is a side sectional view of an automobile floor according to a third embodiment.

FIG. 8 is a perspective view of a cabinet according to a fourth embodiment.

[Explanation of symbols]

 11,17,20 seats 25 cabinets

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Keiichi Tsuruyama 62, Okachi, Niigata, Shimoyama, Kaifu-gun, Aichi Prefecture F-term (reference) 4K014 CE01 4K063 AA12 HA04 5E040 AB01 AB09 AC05 BB03 CA13 5E321 BB53 BB60 GG05 GH05 GH10

Claims (3)

[Claims] An oxidized slag melt of an electric furnace is added with a component for improving magnetic permeability, radiation and electromagnetic wave shielding properties, and then subjected to forced oxidation treatment by blowing air or oxygen, followed by rapid cooling and solidification. Magnetically permeable, radiation and electromagnetic wave shielding material, comprising a granulated product of an electric furnace oxidized slag obtained by the method and a resin material and / or bituminous 2. The magnetically permeable, radiation and electromagnetic wave shielding material according to claim 1, wherein the granulated product of the electric furnace oxidized slag has or has a substantially spherical hollow structure having fine irregularities on its surface. Material 3. The magnetically permeable, radiation and electromagnetic wave shielding material according to claim 1, wherein said electric furnace oxidized slag granulated material has fine irregularities on its surface and has an angular shape.