JP2009221088A - Artificial lightweight aggregate using mixture of diatomaceous earth and garbage molten slag - Google Patents
Artificial lightweight aggregate using mixture of diatomaceous earth and garbage molten slag Download PDFInfo
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- JP2009221088A JP2009221088A JP2008070566A JP2008070566A JP2009221088A JP 2009221088 A JP2009221088 A JP 2009221088A JP 2008070566 A JP2008070566 A JP 2008070566A JP 2008070566 A JP2008070566 A JP 2008070566A JP 2009221088 A JP2009221088 A JP 2009221088A
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- molten slag
- diatomaceous earth
- lightweight aggregate
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- 239000002893 slag Substances 0.000 title claims abstract description 43
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000005909 Kieselgur Substances 0.000 title claims abstract description 36
- 239000000203 mixture Substances 0.000 title claims abstract description 11
- 239000010813 municipal solid waste Substances 0.000 title abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004568 cement Substances 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 10
- 238000010304 firing Methods 0.000 claims abstract description 6
- 239000002699 waste material Substances 0.000 claims description 29
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 abstract description 11
- 230000008018 melting Effects 0.000 abstract description 11
- 238000000465 moulding Methods 0.000 abstract description 11
- 238000010298 pulverizing process Methods 0.000 abstract description 6
- 238000004898 kneading Methods 0.000 abstract description 5
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000003825 pressing Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/023—Fired or melted materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
本発明は、都市ゴミの溶融施設から排出される溶融物を粉砕したゴミ溶融スラグを利用した、珪藻土とゴミ溶融スラグの混合による人工軽量骨材に関する。 TECHNICAL FIELD The present invention relates to an artificial lightweight aggregate obtained by mixing diatomaceous earth and waste molten slag using waste molten slag obtained by pulverizing a melt discharged from a municipal waste melting facility.
秋田県内から産出される珪藻土は、品質も良く多方面に使用されているが、地場産業の活性化の観点から見ると未だ不十分であり、更なる市場の開拓に乗り出す必要性に迫られている。
また、ゴミ溶融スラグは、秋田市の一般家庭ゴミや事業所のゴミを1800℃〜1900℃の高温で溶融し、再資源化したもので、年間約13,700〜15,260t排出されるが、このうち資源として再利用される量は、主にコンクリートの二次製品など、年間1,000t程度であり、他の用途として用いられることはほぼ皆無の状態である。
従来、都市ゴミの溶融施設から排出される溶融物を粉砕したゴミ溶融スラグを利用した、微粉砕したゴミ溶融スラグと消石灰の混合による路盤改良材が知られている(特許文献1を参照)。
この公知技術では、都市ゴミの溶融施設から排出される溶融物を急冷凝固した後、微粉砕した粒径425〜10μmの範囲のゴミ溶融スラグ50重量%と土材料50重量%とからなる混合土に消石灰5〜15重量%添加した路盤改良材である。
その他に、石炭灰を主原料として用い、特に軽量性・安定性に優れた人工骨材を提供する人工軽量骨材用塑性物及び人工軽量骨材の製造方法(特許文献2を参照)、都市ごみの焼却時に生じる飛灰に粘結材としてベントナイトと酸化鉄及び炭化水素の発泡剤とを混合し、焼成して人工軽量骨材を製造する人工軽量骨材の製造方法(特許文献3を参照)やごみ焼却灰に、粘結剤、発泡剤、還元剤と、さらに粗成制御剤としてシリカまたはアルミナを混合して成型し、これを焼成することによって人工軽量骨材を製造する人工骨材の製造方法及びこの方法で得られた人工軽量骨材(特許文献4を参照)が知られている。
しかしこれらは、コンクリートに使用される軽量骨材の品質、とりわけ軽量粗骨材(粒径5mm以上)は、吸水率が大きいほど骨材自身の膨張が生じ、結果としてコンクリートの劣化が問題となる。
Moreover, refuse melting slag is made by melting ordinary household waste in Akita City and business office waste at a high temperature of 1800 ° C to 1900 ° C and recycling them, and is discharged about 13,700-15,260 tons per year. Of these, the amount reused as a resource is about 1,000 tons per year, mainly for secondary products of concrete, and is almost never used for other purposes.
Conventionally, a roadbed improvement material using a mixture of finely pulverized waste molten slag and slaked lime using a molten slag obtained by pulverizing a melt discharged from a municipal waste melting facility is known (see Patent Document 1).
In this known technique, a melt discharged from a municipal waste melting facility is rapidly cooled and solidified, and then mixed ground consisting of 50% by weight of waste molten slag having a particle size of 425 to 10 μm and 50% by weight of soil material. It is a roadbed improvement material which added 5 to 15% by weight of slaked lime.
In addition, plastic materials for artificial lightweight aggregates that use coal ash as the main raw material and provide artificial aggregates that are particularly lightweight and stable, and methods for producing artificial lightweight aggregates (see Patent Document 2), cities Artificial lightweight aggregate manufacturing method in which bentonite, iron oxide, and hydrocarbon foaming agent are mixed with fly ash generated during incineration of garbage and fired to produce artificial lightweight aggregate (see Patent Document 3) ) Artificial aggregates that produce artificial lightweight aggregates by mixing and molding binders, foaming agents, reducing agents, and silica or alumina as a coarseness control agent, and firing them. And an artificial lightweight aggregate obtained by this method (see Patent Document 4) are known.
However, these are the quality of lightweight aggregates used in concrete, especially lightweight coarse aggregates (particle size of 5 mm or more), the larger the water absorption, the more the aggregate itself expands, resulting in a problem of deterioration of the concrete. .
本発明は、都市ゴミの溶融施設から排出される溶融物を粉砕したゴミ溶融スラグを利用した、珪藻土とゴミ溶融スラグの混合による人工軽量骨材を提供することを目的とする。 An object of the present invention is to provide an artificial lightweight aggregate by mixing diatomaceous earth and waste molten slag using waste molten slag obtained by pulverizing a melt discharged from a municipal waste melting facility.
本発明の珪藻土とゴミ溶融スラグの混合による人工軽量骨材の製造方法は、珪藻土とゴミ溶融スラグを微粉砕し、これらにセメントを安定材として添加し、一定の水量のもとで練り混ぜ、この混練材料を球状成形型加圧装置に入れて球状にし、一定期間養生後、焼成して人工的な軽量骨材とするものである。
本発明の珪藻土とゴミ溶融スラグの混合による人工軽量骨材は、微粉砕した珪藻土75重量%と微粉砕したゴミ溶融スラグ25重量%の配合割合に対して、セメント2〜10重量%の範囲で添加し、一定の水量のもとで練り混ぜ、この混練材料を球状成形型加圧装置により球状に成形し、一定期間養生後、焼成したものである。
本発明の珪藻土とゴミ溶融スラグの混合による人工軽量骨材は、前記球状成形型加圧装置により粒径5〜20mmの球状にしたものである。
The method for producing an artificial lightweight aggregate by mixing diatomaceous earth and waste molten slag according to the present invention is to finely pulverize diatomaceous earth and waste molten slag, add cement as a stabilizer to them, and knead under a certain amount of water, This kneaded material is put into a spherical mold pressing device to make it spherical, and after curing for a certain period of time, it is fired to obtain an artificial lightweight aggregate.
The artificial lightweight aggregate by mixing diatomaceous earth and waste molten slag of the present invention is in the range of 2 to 10% by weight of cement with respect to a blending ratio of 75% by weight of finely ground diatomaceous earth and 25% by weight of finely ground dust molten slag. The kneaded material is added and kneaded under a constant amount of water, and the kneaded material is formed into a spherical shape with a spherical mold pressing device, cured for a certain period, and then fired.
The artificial lightweight aggregate obtained by mixing diatomaceous earth and waste molten slag according to the present invention is formed into a spherical shape having a particle diameter of 5 to 20 mm by the spherical mold pressing device.
本発明の珪藻土75重量%とゴミ溶融スラグ25重量%の配合割合に対して、セメント2〜10重量%の添加で焼成した人工軽量骨材は、品質(密度、吸水率)が市販の製品と比べてもほとんど変わらないことが確認され、製品化・事業展開が期待できる効果がある。 The artificial lightweight aggregate baked with the addition of 2 to 10% by weight of cement with respect to the blending ratio of 75% by weight of diatomaceous earth and 25% by weight of molten slag of the present invention has a quality (density, water absorption) that is a commercially available product. It is confirmed that there is almost no change even when compared, and there is an effect that commercialization and business development can be expected.
以下に、本発明の珪藻土とゴミ溶融スラグの混合による人工軽量骨材の製造工程を説明する。
珪藻土を粒径50μm以下に微粉砕し、ゴミ溶融スラグを粒径250μm以下に微粉砕する。
微粉砕した珪藻土とゴミ溶融スラグを75重量%:25重量%の配合割合で混合し、この配合割合の混合物に対して2〜10重量%のセメントを安定材として混合する。
これらを一定の水量のもとで練り混ぜ、この混練した材料を球状成形型加圧装置により所定の球状に成形し、一定期間(28日)養生後、高温1200℃で40〜100分間焼成する。
これにより、5〜20mm球状の人工軽量骨材が作製される。人工軽量骨材とは、人工的に焼成・発泡して得られる構造用及び非構造用軽量コンクリートの骨材であり、骨材の内部に空隙を保有し、表面が緻密なガラスで覆われた軽い骨材である。
この発明では非構造用軽量コンクリートの骨材を主眼としている。
Below, the manufacturing process of the artificial lightweight aggregate by mixing of the diatomaceous earth and garbage fusion | melting slag of this invention is demonstrated.
Diatomaceous earth is finely pulverized to a particle size of 50 μm or less, and dust molten slag is finely pulverized to a particle size of 250 μm or less.
Finely ground diatomaceous earth and waste molten slag are mixed at a blending ratio of 75% by weight: 25% by weight, and 2 to 10% by weight of cement is mixed as a stabilizer with respect to the mixture of the blending ratio.
These are kneaded under a constant amount of water, and the kneaded material is molded into a predetermined spherical shape with a spherical molding die pressurizer, cured for a certain period (28 days), and baked at a high temperature of 1200 ° C. for 40 to 100 minutes. .
Thereby, a 5-20 mm spherical artificial lightweight aggregate is produced. Artificial lightweight aggregate is a structural and non-structural lightweight concrete aggregate obtained by artificial firing and foaming, with voids inside the aggregate and the surface covered with dense glass Light aggregate.
This invention focuses on the aggregate of non-structural lightweight concrete.
図1、図2に本発明の球状成形型加圧装置の概略図を示す。
本発明の球状成形型加圧装置は、空気圧等の流体により作動されるシリンダー1と、該シリンダー1の作動により往復動されるピストンロッド2と、該ピストンロッド2の先端に固定された加圧板3と、該加圧板3により内部の混練材料Mがペレット状に押出成形される成形容器4と、該成形容器4から押し出されたペレット状の混練材料Sを移送するU字状断面の傾斜シュート5と、該傾斜シュート5の先端に上下に配置されたU溝成形主ローラ6及びU溝成形従ローラ7から構成される。
なお、8は機台、9は傾斜調節台、10は空気吹き出し口、Mは混練材料、Sはペレット状混練材料である。
FIG. 1 and FIG. 2 show schematic views of the spherical mold pressing device of the present invention.
The spherical mold pressing device of the present invention includes a
In addition, 8 is a machine stand, 9 is an inclination adjustment stand, 10 is an air blowing port, M is a kneading material, and S is a pellet-like kneading material.
次に、本発明の球状成形型加圧装置の操作動作を添付図面に基づいて以下に説明する。
微粉砕した珪藻土とゴミ溶融スラグを75重量%:25重量%の配合割合で混合し、この配合割合の混合物に対して2〜10重量%のセメントを安定材として混合し、これらを一定の水量のもとで練り混ぜ、この混練材料Mを成形容器4に充填する。
シリンダー1を作動させてピストンロッド2を伸長させて加圧板3により前記混練材料Mを押し出して前記成形容器4の下部からペレット状に混練材料Sを傾斜シュート5へ供給する。
前記ペレット状混練材料Sは前記傾斜シュート5を空気吹き出し口10からのエアーにより転動落下し、上下に配置されたU溝成形主ローラ6及びU溝成形従ローラ7間に至り、前記U溝成形主ローラ6及びU溝成形従ローラ7間に挟まれて加圧され粒径5〜20mmの球状に成形される。
Next, the operation of the spherical mold pressing device of the present invention will be described below with reference to the accompanying drawings.
Finely ground diatomaceous earth and waste molten slag are mixed at a blending ratio of 75% by weight: 25% by weight, and 2-10% by weight of cement is mixed as a stabilizer with respect to the mixture of this blending ratio, and these are mixed with a certain amount of water. The kneaded material M is filled in the
The
The pellet-like kneaded material S rolls down the
珪藻土の物理化学的性質
・比重が小さく、ポーラスであるため軽量である。
密度2.20g/cm3
・水分や油分を大量に保持する。
乾燥土壌改良する土壌改良材、流出した油を捕集する。
珪藻土の化学成分
Physicochemical properties of diatomaceous earth ・ Lightweight because of its low specific gravity and porosity.
Density 2.20 g / cm 3
・ Holds a large amount of moisture and oil.
Collects soil improvement material to improve dry soil and spilled oil.
Chemical composition of diatomaceous earth
ゴミ溶融スラグの物理化学的性質
・ゴミ溶融スラグ(秋田市総合環境センターの溶融施設からの排出物)
粒径2.36mm〜0.15mm、密度2.87g/cm3、吸水率0.60%、透水係数4.6×10−2cm/s
ゴミ溶融スラグの化学成分
Physicochemical properties of waste melting slag ・ Waste melting slag (Emissions from melting facilities of Akita City Environmental Center)
2.36 mm to 0.15 mm particle size, density 2.87 g / cm 3 , water absorption 0.60%, water permeability 4.6 × 10 −2 cm / s
Chemical composition of waste molten slag
二酸化珪素(SiO2)が多量に含有し、かつガラス質90%以上含有しており、水またはアルカリ水溶液で反応して水硬性を発揮する。微粉砕によって比表面積が増大、より潜在水硬性が増加する。
(実験例)
1.人工軽量骨材の材料
・珪藻土を50μmに微粉砕
・ゴミ溶融スラグを250μmに微粉砕
2.実験条件
1)微粉砕した珪藻土とゴミ溶融スラグの配合
・珪藻土75重量%、ゴミ溶融スラグ25重量%(乾燥重量比)
・珪藻土50重量%、ゴミ溶融スラグ50重量%(乾燥重量比)
・珪藻土25重量%、ゴミ溶融スラグ75重量%(乾燥重量比)
2)上記1)の3種類の配合条件下でのセメントの配合割合
・2%、5%、10%の3種類
3.上記2)条件で作製した混合材料の焼成温度と焼成時間
・珪藻土75重量%、ゴミ溶融スラグ25重量%は、1200℃で40〜100分
・珪藻土50重量%、ゴミ溶融スラグ50重量%は、1200℃で2〜10分
・珪藻土25重量%、ゴミ溶融スラグ75重量%は、1200℃で1分
4.電気炉の燃焼の温度段階と燃焼時間
ステップ1:300℃まで1時間燃焼
ステップ2:300℃〜600℃まで1時間
ステップ3:600℃〜900℃まで1時間
ステップ4:900℃〜1200℃まで1時間
ステップ5:1200℃到達後の燃焼時間は、上記の配合割合に依存する。
(Experimental example)
1. Artificial lightweight aggregate material ・ Diatomized diatomaceous earth to 50μm ・ Grinded molten slag to 250μm Experimental conditions 1) Mixing of finely ground diatomaceous earth and waste molten slag ・ 75% by weight of diatomaceous earth, 25% by weight of molten molten slag (dry weight ratio)
・ 50% by weight of diatomaceous earth, 50% by weight of molten slag (dry weight ratio)
・ 25% by weight of diatomaceous earth, 75% by weight of molten slag (dry weight ratio)
2) Cement blending ratio under the three blending conditions of 1)-3% 2%, 5%, 10% Firing temperature and firing time of the mixed material prepared under the above 2) conditions: 75% by weight of diatomaceous earth and 25% by weight of molten slag are 40 to 100 minutes at 1200 ° C. 50% by weight of diatomaceous earth and 50% by weight of molten molten slag are 2 to 10 minutes at 1200 ° C. ・ 25% by weight of diatomaceous earth and 75% by weight of molten slag for 1 minute at 1200 ° C. Temperature phase and combustion time of electric furnace combustion Step 1: Combustion for 1 hour to 300 ° C Step 2: 1 hour to 300 ° C to 600 ° C Step 3: 1 hour to 600 ° C to 900 ° C Step 4: Up to 900 ° C to 1200 °
1 シリンダー
2 ピストンロッド
3 加圧板
4 成形容器
5 傾斜シュート
6 U溝成形主ローラ
7 U溝成形従ローラ
8 機台
9 傾斜調節台
10 空気吹き出し口
DESCRIPTION OF
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Priority Applications (1)
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