JP4031070B2 - Heavy aggregate - Google Patents

Description

【０００９】
該重量細骨材(11)の物理的性質を表２に示す。
【表２】

該重量細骨材(11)の粒度分布を図３に示す。
【００１０】
【発明の効果】
本発明の重量骨材は高比重を有し、かつ耐久性、耐蝕性、耐磨耗性があるから、コンクリート製品、ゴム製品、プラスチック製品、粘土製品等に大重量を付し、かつ制振性、遮音性、放射線シールド性、透磁性等を付与するために使用されて極めて有用である。
【図面の簡単な説明】
【図１】電気溶解炉説明図
【図２】骨材製造装置の説明図
【図３】重量細骨材の粒度分布図
【符号の説明】
1 電気炉酸化スラグ
2 電気溶解炉
11 重量細骨材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heavy aggregate used for heavy fine aggregates, heavy coarse aggregates and the like added to cement, plastic, rubber and the like.
[0002]
[Prior art]
Conventionally, natural resources such as river sand, silica sand, and crushed sand have been used as fine aggregates, but it becomes increasingly difficult to secure the above natural resources, and instead, electric furnace oxidation slag granulation is used as fine aggregates. It is being considered.
The electric furnace oxidized slag granulated product does not contain unstable free lime, free magnesia, or minerals, has durability and corrosion resistance, and is heavy in weight, and thus imparts vibration damping and sound insulation to the product.
[0003]
[Problems to be solved by the invention]
Recently, concrete products, vibration control, sound insulation, radiation shielding, magnetic permeability, etc., plastic products, rubber products, clay products, etc. have been in the spotlight, and there is a growing need for aggregates with high weight and specific gravity. Yes.
[0004]
[Means for Solving the Problems]
As a means for solving the above-mentioned problems, the present invention provides a heavy aggregate obtained by adding and dissolving a high specific gravity element and / or a high specific gravity element compound in an electric furnace oxidation slag, and cooling and granulating it.
[0005]
The high specific gravity element used in the present invention is an element having a specific gravity of 7 or more. Examples of such elements include Fe, Co, Cu, Zn, Pb, and the like. Examples thereof include oxides, hydroxides, chlorides, and the like. Desirable high specific gravity elements or compounds thereof include iron, copper, iron scrap, iron oxide, lead dross and the like.
[0006]
In order to produce the heavy aggregate of the present invention, as shown in FIG. 1, an electric furnace oxidation slag (1) and a high specific gravity element and / or a high specific gravity element compound are put into an electric melting furnace (2) and an electrode (3 The slag (1) and high specific gravity element and / or high specific gravity element compound are dissolved, and if desired, oxygen and / or air is blown to cool and solidify and pulverize the dissolved product. In this case, when the melt is poured into a plate-shaped container made of steel plate to a thickness of usually 80 mm, and then cooled with water and pulverized with a crusher, a coarse coarse aggregate is produced.
[0007]
In order to produce heavy fine aggregate from the melt, the melt is usually poured into a bladed drum that rotates at high speed, the melt is crushed and granulated by the bladed drum, and the granulated melt is A method of quenching in a water mist atmosphere is employed. A plurality of bladed drums may be arranged to perform a plurality of stages of crushing and granulating.
The heavy aggregate obtained in this way usually has 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 an excellent shape with fine irregularities on the surface, and a particle size distribution. Is in the standard range of crushed sand for JIS-A5005 concrete.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
〔Example〕
4.5 tons of electric furnace oxidation slag (1) was put into the electric melting furnace (2) shown in Fig. 1, and 1.5 tons of slag was added as iron scrap, and oxygen was blown from the lance pipe (4). As shown in FIG. 2, the melt (1A) obtained by heating and melting while being refined is transferred from the ladle (5) to the shooter (6), and from the shooter (6), a bladed drum (7, 8) Inject. The melt (1A) is pulverized and granulated by the bladed drum (7, 8), and the granulate (1B) of the melt (1A) is fed from the spray device (10) into the quenching chamber (9). Quenched by sprayed water mist. The heavy fine aggregate (11) thus obtained is stored in the storage container (12). The heavy fine aggregate (11) is substantially spherical and has an average particle size of 1.2 mm. The main mineral composition of the heavy fine aggregate is wustite and magnetite, and since they are free of unstable minerals, they are durable and corrosion resistant.
The chemical composition of the heavy fine aggregate (11) is shown in Table 1.
[Table 1]

[0009]
Table 2 shows the physical properties of the heavy fine aggregate (11).
[Table 2]

The particle size distribution of the heavy fine aggregate (11) is shown in FIG.
[0010]
【The invention's effect】
Since the heavy aggregate of the present invention has a high specific gravity and has durability, corrosion resistance, and wear resistance, it gives heavy weight to concrete products, rubber products, plastic products, clay products, etc. It is extremely useful when used for imparting properties, sound insulation, radiation shielding, magnetic permeability, and the like.
[Brief description of the drawings]
[Fig. 1] Electrolytic furnace explanatory diagram [Fig. 2] Aggregate production device illustration [Fig. 3] Grain size distribution diagram of heavy fine aggregate [Explanation of symbols]
1 Electric furnace oxidation slag
2 Electric melting furnace
11 Heavy fine aggregate

Claims (1)

Heavy aggregate characterized by adding high specific gravity element and / or high specific gravity element compound to electric furnace oxidation slag, dissolving, cooling and granulating

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