JPH08259288A - Method for effectively utilizing dust generated at the time of production of perlite and production of artificial lightweight aggregate - Google Patents
Method for effectively utilizing dust generated at the time of production of perlite and production of artificial lightweight aggregateInfo
- Publication number
- JPH08259288A JPH08259288A JP8733095A JP8733095A JPH08259288A JP H08259288 A JPH08259288 A JP H08259288A JP 8733095 A JP8733095 A JP 8733095A JP 8733095 A JP8733095 A JP 8733095A JP H08259288 A JPH08259288 A JP H08259288A
- Authority
- JP
- Japan
- Prior art keywords
- dust
- mixture
- powder
- production
- perlite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000428 dust Substances 0.000 title claims abstract description 59
- 239000010451 perlite Substances 0.000 title claims abstract description 17
- 235000019362 perlite Nutrition 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 28
- 238000000034 method Methods 0.000 title claims description 9
- 239000000843 powder Substances 0.000 claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 19
- 239000005332 obsidian Substances 0.000 claims abstract description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 10
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 229910001562 pearlite Inorganic materials 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 18
- 238000010304 firing Methods 0.000 claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 8
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 238000005187 foaming Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000005453 pelletization Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000002994 raw material Substances 0.000 description 15
- 238000010521 absorption reaction Methods 0.000 description 12
- 230000005484 gravity Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000002440 industrial waste Substances 0.000 description 7
- 239000011435 rock Substances 0.000 description 6
- 238000005469 granulation Methods 0.000 description 4
- 230000003179 granulation Effects 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 239000002243 precursor Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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
- C04B18/027—Lightweight 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
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
- C04B18/167—Recycled materials, i.e. waste materials reused in the production of the same 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)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、産業廃棄物である真珠
岩ダスト、黒曜石ダスト粉末をパーライトに比べて強
度、吸収率などの優れた造粒型人工軽量骨材に製造する
際の原料として有効利用する方法及び該原料による人工
軽量骨材の製造法に関する。BACKGROUND OF THE INVENTION The present invention is used as a raw material for the production of pearlite dust and obsidian dust powder, which are industrial wastes, into a granulated artificial lightweight aggregate that is superior in strength and absorptivity to perlite. The present invention relates to a method for effectively using the material and a method for producing an artificial lightweight aggregate using the raw material.
【０００２】[0002]
【従来の技術】一般にパーライトの製造には、原料とし
て真珠岩、黒曜石などが用いられており、これを破砕し
発泡、焼成して製品を得ているが、パーライト製造工程
中の原料の採掘、破砕、又は焼成時に大量の粉塵（ダス
ト粉末）が発生する。2. Description of the Related Art Generally, pearlite, obsidian, etc. are used as a raw material in the production of perlite, which is crushed, foamed and fired to obtain a product. A large amount of dust (dust powder) is generated during crushing or firing.
【０００３】パーライトは、軽量モルタル等の骨材とし
て用いられているが、軽量で強度が弱く、また吸水率も
高いためコンクリートの骨材としては規格にあわず、こ
れがダストとして微粉末になると更に吸水率が高まる等
により利用分野がなくなるとされ、このダスト粉末は、
従来から産業廃棄物として廃棄処分されているにすぎな
かった。Perlite is used as an aggregate for lightweight mortar and the like, but since it is lightweight and weak in strength and has a high water absorption rate, it does not meet the standard as an aggregate of concrete, and if it becomes fine powder as dust, It is said that the field of application will disappear due to increased water absorption rate, etc.
Traditionally, it has only been disposed of as industrial waste.
【０００４】また、ダストの利用としては、膨張頁岩、
膨張性粘土を原料とした軽量骨材を製造する際に発生す
るダストを用いて造粒型軽量骨材が製造されている。こ
の骨材は絶乾比重で、０．３５〜１．６０程度の汎用の
軽量骨材であり、通常の軽量コンクリートの粗骨材とし
て利用されている。The use of dust includes expansion shale,
Granulated lightweight aggregates are produced using dust generated when producing lightweight aggregates made of expansive clay. This aggregate is a general-purpose lightweight aggregate having a specific gravity of about 0.35 to 1.60, and is used as a coarse aggregate of ordinary lightweight concrete.
【０００５】[0005]
【発明が解決しようとする課題】しかし、真珠岩ダス
ト、黒曜石ダストの発生量は、今後パーライトの需要の
増加と供に増える可能性があるが、なんら有効利用する
手段が開発されておらず、産業廃棄物としての処理も未
解決のままである。一方、環境の整備に伴って埋立廃棄
場所の不足は今まで以上に問題化されており、これらの
廃棄物を有効利用する技術の開発が望まれている。However, although the generation amount of pearlite dust and obsidian dust may increase along with the increase in demand for perlite in the future, no means for effectively utilizing them has been developed. The treatment as industrial waste remains unsolved. On the other hand, the shortage of landfill disposal sites has become more problematic with the improvement of the environment, and the development of technology for effectively utilizing these wastes is desired.
【０００６】また、パーライトは、コンクリートの軽量
骨材としては規格が合わないため単独では用いることが
できず補助材の混合を必要とする。今日、人工軽量骨材
としては様々なものが開発されているが、いずれも製造
方法が複雑であったり、製造コストの高くつくものであ
った。Further, perlite cannot be used alone because it does not meet the standard as a lightweight aggregate of concrete, and it requires mixing of auxiliary materials. Various artificial lightweight aggregates have been developed today, but all of them are complicated in manufacturing method and expensive to manufacture.
【０００７】さらに、膨張頁岩、膨張性粘土のダストを
有効利用した造粒型軽量骨材は、絶乾比重で、０．３５
〜１．６０程度の汎用の造粒型軽量骨材であるが、一般
的に吸水率が大きいものが多く施工時の水分管理、ポン
プ圧送性などに問題点を残している。Further, the granulated lightweight aggregate which effectively utilizes the dust of expansive shale and expansive clay has an absolute dry specific gravity of 0.35.
Although it is a general-purpose granulated lightweight aggregate of about 1.60, it generally has a large water absorption rate, and has problems such as water management at the time of construction and pumpability.
【０００８】また、最近では造粒型軽量骨材の製造法と
して、特公昭６２−１２１８６号公報に代表される抗火
石を原料として、各種発泡剤を添加した構造用軽量コン
クリートに用いられる造粒型人工軽量骨材の製造も試み
られているが、主原料となる岩石の採掘、粗砕、原料乾
燥、粉砕と原料粉末にするまでの工程が多く、コストが
かかり過ぎ採算がとれない欠点がある。Further, recently, as a method for producing a granulation type lightweight aggregate, granulation used for structural lightweight concrete using anti-firestone represented by Japanese Patent Publication No. 62-12186 as a raw material and adding various foaming agents. Although attempts have been made to manufacture type artificial lightweight aggregates, there are many steps from mining, coarse crushing, drying of raw materials, crushing of raw material rocks to raw powder, which is too costly and unprofitable. is there.
【０００９】本発明は、従来廃棄処分としていた産業廃
棄物である真珠岩ダスト、黒曜石ダストの有効利用法及
び、得られる人工軽量骨材が、吸水率が小さく、しかも
強度があり、コンクリートの造粒型人工軽量骨材として
も用いることができ、さらに、製造工程も簡略化でき、
低コストな造粒型人工軽量骨材の製造法を提供すること
を目的とする。The present invention provides a method for effectively utilizing pearlite dust and obsidian dust, which are industrial wastes that have been conventionally disposed of, and the resulting artificial lightweight aggregate has a low water absorption rate and a high strength, and is made of concrete. It can also be used as a granular artificial lightweight aggregate, and the manufacturing process can be simplified.
It is an object of the present invention to provide a method for manufacturing a low cost granulated artificial lightweight aggregate.
【００１０】[0010]
【問題が解決するための手段】そこで、本発明者らは産
業廃棄物である真珠岩ダスト、黒曜石ダストを有効利用
する方法について鋭意研究を重ねた結果、パーライトを
製造する際に発生する真珠岩ダスト、黒曜石ダスト粉末
の単味又は、これらの混合物にアルカリ物質を添加して
造粒し、乾燥後加熱発砲させ、人工軽量骨材を得ればパ
ーライト製造時に発生するダストを有効利用できるとの
知見を得て本発明を完成した。[Means for Solving the Problem] Therefore, the inventors of the present invention have conducted earnest studies on a method for effectively utilizing industrial wastes such as pearlite dust and obsidian dust, and as a result, pearlite produced during the production of perlite Dust, plain or obsidian dust powder, or by adding an alkaline substance to a mixture thereof, granulating, heating and firing after drying, if the artificial lightweight aggregate is obtained, it is possible to effectively use the dust generated during the production of perlite. The present invention has been completed based on knowledge.
【００１１】そして、粒径１００μｍ以下の粉末が１０
０重量％かつ２０μｍより大きい粒径が３０重量％以上
に調整した真珠岩ダスト、黒曜石ダスト単味又は、これ
らの混合物を主原料とし、これに水ガラス、炭酸ナトリ
ウム、水酸化ナトリウム、炭酸カリウムのうち１種又は
２種以上のアルカリ物質を添加して造粒し、乾燥後加熱
発泡させれば、構造用軽量コンクリートに利用できる強
度を有し、吸水率の低い人工軽量骨材が簡単な製造方法
で低コストで得られることを見出した。10 powders having a particle size of 100 μm or less
The main raw material is pearlite dust, obsidian dust, or a mixture thereof, which is adjusted to have a particle size of 0% by weight and more than 20 μm of 30% by weight or more, and water glass, sodium carbonate, sodium hydroxide, potassium carbonate If one or more of these alkaline substances are added, granulated, dried and then heat-foamed, it is easy to manufacture an artificial lightweight aggregate that has the strength that can be used for structural lightweight concrete and has a low water absorption rate. It was found that the method can be obtained at low cost.
【００１２】本発明で有効利用が可能な産業廃棄物とし
ては、真珠岩ダスト、黒曜石ダスト粉末が挙げられる
が、割合に関係なく混合した原料も利用できる。Industrial wastes that can be effectively used in the present invention include pearlite dust and obsidian dust powder, but mixed raw materials can be used regardless of the ratio.
【００１３】これらのダストの粉末度は、１００μｍ以
下の粒径が１００重量％かつ２０μｍより大きい粒径が
３０重量％以上であることが必要である。主原料粉末と
なるダスト中の粒径２０μｍより大きい粉末が３０％よ
り少なくなると、ダスト自体の発泡性が低下し、骨材が
軽量化せず、また粒径１００μｍを超える粉末が混入す
ると、主原料粉末の発泡に起因する気孔の径が大きくな
り骨材強度の低下を招き好ましくない。The fineness of these dusts must be such that the particle size of 100 μm or less is 100% by weight and the particle size of 20 μm or more is 30% by weight or more. If the amount of powder having a particle size of more than 20 μm in the main raw material powder is less than 30%, the foamability of the dust itself will decrease, the aggregate will not be lightened, and if powder having a particle size of more than 100 μm is mixed, The diameter of the pores resulting from the foaming of the raw material powder becomes large and the aggregate strength decreases, which is not preferable.
【００１４】主原料となるダストの粉末度は、上記範囲
に調整することが必要となるが、ダストとしてこの粒度
分布を得て既に粉末化されているときは、既存の造粒型
人工軽量骨材の製造方法に見られる岩石の採掘、粗砕、
原料乾燥、粉末度管理を伴う粉砕などの工程を簡略化す
ることが可能なうえに、かつ得られた軽量骨材の性状は
比重、吸水率、骨材強度何れも既存の軽量骨材と同等な
ものを得ることができる。The fineness of the dust as the main raw material needs to be adjusted within the above range, but when it is already pulverized by obtaining this particle size distribution as dust, the existing granulated artificial lightweight bone is used. Mining and crushing rocks, which can be seen in the method of manufacturing timber
In addition to being able to simplify processes such as raw material drying and crushing with powder quality control, the properties of the obtained lightweight aggregate are the same as the existing lightweight aggregate in terms of specific gravity, water absorption rate and aggregate strength. You can get what you want.
【００１５】構造用軽量コンクリートの製造法として
は、粒度調整された真珠岩ダスト、黒曜石ダスト粉末の
単味又はこれら混合物に、水ガラス等のアルカリ物質と
水の混合液を添加してオムニミキサーを用いて十分に混
練すると同時に軽量骨材の前駆体を球状に成形し、その
後１１０℃で２４時間乾燥させる。乾燥した軽量骨材前
駆体は、予め９００〜１３００℃に加熱した焼成炉に投
入する。このとき、温度が９００℃より低いと骨材表面
に覆う融液が生成されず内部ガスが発生しても骨材の発
泡軽量化が望めない。また、処理温度が１３００℃を超
えると骨材を形成するガラス相の粘性が低下し、変形お
よび骨材同志の融着が顕著になり好ましくない。As a method for producing structural lightweight concrete, an omni-mixer is prepared by adding a mixed liquid of an alkaline substance such as water glass and water to pearlite dust or obsidian dust powder having a controlled particle size or a mixture thereof. When the mixture is sufficiently kneaded, the precursor of the lightweight aggregate is formed into a spherical shape and then dried at 110 ° C. for 24 hours. The dried lightweight aggregate precursor is put into a firing furnace preheated to 900 to 1300 ° C. At this time, if the temperature is lower than 900 ° C., the melt covering the surface of the aggregate is not generated and even if internal gas is generated, it is not possible to expect foaming and weight reduction of the aggregate. Further, if the treatment temperature exceeds 1300 ° C., the viscosity of the glass phase forming the aggregate decreases, and deformation and fusion of the aggregates become remarkable, which is not preferable.
【００１６】[0016]
実施例１〜８ パーライト製造時に発生するダストとして、アサノパー
ライト社から排出された、真珠岩ダスト、黒曜石ダスト
を用いた。表１に示す原料、粒度構成のダスト粉末に水
ガラス（日本化学社製、商品名：水溶液３号）を３０重
量％（外割り）添加し、１０Ｌオムニミキサーを用いて
混練すると同時に軽量骨材の前駆体を球状に成形し、そ
の中からφ１０ｍｍの成形体を準備した。次いで、準備
した成形物を１１０℃乾燥機で２４時間乾燥した後、こ
れを焼成炉で１１００〜１２５０℃の温度範囲で１０分
間焼成し発泡させ、実施例１〜８の軽量骨材を得た。Examples 1 to 8 As the dust generated during the production of perlite, pearlite dust and obsidian dust discharged from Asano Pearlite were used. Water glass (manufactured by Nippon Kagaku Co., Ltd., trade name: Aqueous Solution No. 3) (30% by weight (outside ratio)) was added to the dust powder having the raw materials and particle size constitutions shown in Table 1 and kneaded using a 10 L omni mixer and at the same time, a lightweight aggregate The precursor was molded into a spherical shape, and a molded body having a diameter of 10 mm was prepared from the precursor. Next, the prepared molded product was dried in a 110 ° C. dryer for 24 hours and then baked in a baking furnace in the temperature range of 1100 to 1250 ° C. for 10 minutes to foam, thereby obtaining the lightweight aggregates of Examples 1 to 8. .
【００１７】得られた軽量骨材を、ＪＩＳ Ａ １１３５
（構造用軽量骨材の比重及び吸水試験方法）に従い、絶
乾比重と吸水率を求め、さらに、乾燥処理したφ１３〜
１４ｍｍの軽量骨材から無作為に１００個を抽出し、材
料試験機を用いて骨材１粒づつの圧壊強度を測定した。
その結果を表１に示す。The resulting lightweight aggregate was compliant with JIS A 1135.
In accordance with (Specific gravity and water absorption test method for lightweight structural aggregate), the absolute dry specific gravity and water absorption were determined, and further subjected to a drying treatment of φ13-
100 pieces were randomly extracted from the 14 mm lightweight aggregate, and the crushing strength of each aggregate was measured using a material testing machine.
Table 1 shows the results.
【００１８】比較例１〜４ 比較として、真珠岩岩石、抗火石岩石をボールミルによ
り粉砕し表１に示す粒度構成にした粉末を実施例１〜８
に準じて造粒し、焼成を行ない比較例１〜４の軽量骨材
を得た。得られた軽量骨材につき、実施例１〜８に準じ
て絶乾比重、吸水率及び圧壊強度を測定し、その結果を
表１に示す。Comparative Examples 1 to 4 For comparison, pearlite rock and anti-firestone rock were crushed by a ball mill to obtain powders having the particle size constitution shown in Table 1 as Examples 1 to 8.
According to the above, granulation and firing were performed to obtain the lightweight aggregates of Comparative Examples 1 to 4. With respect to the obtained lightweight aggregate, the absolute dry specific gravity, the water absorption rate and the crush strength were measured according to Examples 1 to 8, and the results are shown in Table 1.
【００１９】比較例５〜６ 真珠岩ダスト、黒曜石ダストの代わりに、軽量骨材アサ
ノライト（日本セメント株式会社製）を製造する際に発
生する膨張頁岩ダストを用い軽量骨材を製造した。製造
は、膨張頁岩ダストに酸化鉄を５重量％（外割り）、カ
ーボンを１０重量％（外割り）を添加し、得られた粉末
を実施例１〜８に準じて造粒し、その中からφ１０〜１
２ｍｍの成形体を準備した。準備した成形物は１１０℃
乾燥機で２４時間乾燥し、これを焼成炉で１１００℃〜
１２５０℃の温度にて１０分間焼成し、発泡させ、比較
例５〜６のφ１３〜１４ｍｍの軽量骨材を得た。得られ
た軽量骨材につき、実施例１〜８に準じて絶乾比重、吸
水率及び圧壊強度を測定し、その結果を表１に示す。Comparative Examples 5 to 6 Instead of pearlite dust and obsidian dust, expanded shale dust generated when producing lightweight aggregate asanolite (manufactured by Nippon Cement Co., Ltd.) was used to produce a lightweight aggregate. The production was carried out by adding 5% by weight of iron oxide (outer ratio) and 10% by weight of carbon (outer ratio) to the expanded shale dust, and granulating the obtained powder according to Examples 1-8. From φ10 to 1
A 2 mm compact was prepared. The prepared molding is 110 ° C
It is dried in a dryer for 24 hours, and it is heated at 1100 ° C in a firing furnace.
Firing was performed at a temperature of 1250 ° C. for 10 minutes to cause foaming to obtain lightweight aggregates of φ13 to 14 mm of Comparative Examples 5 to 6. With respect to the obtained lightweight aggregate, the absolute dry specific gravity, the water absorption rate and the crush strength were measured according to Examples 1 to 8, and the results are shown in Table 1.
【００２０】[0020]
【表１】 [Table 1]
【００２１】実施例９〜１５、比較例７ パーライト製造時に発生するダストとして、アサノパー
ライト社から排出された真珠岩ダストを用いた。ダスト
粉末は、粒径１００μｍ以下の粉末が１００重量％かつ
粒径２０μｍより大きい粉末が５０重量％のものを用
い、このダスト粉末に表２に示す各種アルカリを単独又
は２種以上を混合し、外割りで１０重量％の蒸留水に溶
かしてダストに添加した。これを１０Ｌオムニミキサー
にて混練すると同時に球状に成形しその中からφ１０〜
１２ｍｍの成形体を得た。得られた成形体を１１０℃乾
燥機にて２４時間乾燥し、さらに焼成炉で１２００℃の
温度にて１０分間焼成して発泡させ、実施例９〜１５の
φ１３〜１４ｍｍの軽量骨材を得た。また、比較のため
アルカリ物質無添加にした以外は実施例９〜１５に準じ
て比較例７の軽量骨材を得た。Examples 9 to 15 and Comparative Example 7 As the dust generated during the production of perlite, pearlite dust discharged from Asano Pearlite was used. As the dust powder, 100% by weight of a powder having a particle size of 100 μm or less and 50% by weight of a powder having a particle size of more than 20 μm are used, and various kinds of alkalis shown in Table 2 are mixed alone or in combination of two or more kinds. It was dissolved in 10% by weight of distilled water by adding externally and added to the dust. This is kneaded with a 10 L omni mixer and at the same time formed into a spherical shape, from which φ10
A 12 mm compact was obtained. The molded body thus obtained was dried in a 110 ° C. dryer for 24 hours, and further fired in a firing furnace at a temperature of 1200 ° C. for 10 minutes to foam, to obtain lightweight aggregates of Examples 9 to 15 of φ13 to 14 mm. It was Further, for comparison, a lightweight aggregate of Comparative Example 7 was obtained according to Examples 9 to 15 except that no alkaline substance was added.
【００２２】得られた実施例９〜１５及び比較例７の軽
量骨材につき、実施例１〜８に準じて絶乾比重、吸水率
及び圧壊強度を測定し、その結果を表２に示す。With respect to the obtained lightweight aggregates of Examples 9 to 15 and Comparative Example 7, the absolute dry specific gravity, the water absorption rate and the crush strength were measured according to Examples 1 to 8 and the results are shown in Table 2.
【００２３】[0023]
【表２】 [Table 2]
【００２４】[0024]
【発明の効果】本発明によれば、産業廃棄物であるパー
ライトダストの真珠岩ダスト、黒曜石ダストにアルカリ
物質を添加し造粒、焼成することによって人工軽量骨材
を得ることができ、パーライトダストを有効利用するこ
とが可能となる。また、真珠岩ダスト、黒曜石ダストの
粉末度を、１００μｍ以下の粒径が１００重量％かつ２
０μｍより大きい粒径が３０重量％以上にすることによ
り、得られる人工軽量骨材は、吸水率が低くかつ高強度
で、コンクリートの軽量骨材としても用いることがで
き、製造方法も簡単かつ低コストで、しかも施工時の水
分管理、ポンプ圧送性が良好になる。INDUSTRIAL APPLICABILITY According to the present invention, an artificial lightweight aggregate can be obtained by adding an alkaline substance to pearlite dust and obsidian dust of perlite dust, which is an industrial waste, and obtaining an artificial lightweight aggregate. Can be effectively used. In addition, the fineness of pearlite dust and obsidian dust is 100 wt% and 2
By setting the particle size larger than 0 μm to 30% by weight or more, the resulting artificial lightweight aggregate has a low water absorption rate and high strength, and can be used as a lightweight aggregate for concrete, and the manufacturing method is simple and low. The cost is good, and the water management during construction and pumping performance are good.
【００２５】さらに、従来の造粒型軽量骨材の製造は、
岩石の採掘、粗砕、原料乾燥、粉砕の後混合、造粒、乾
燥、焼成を行っていたが、ダストとしてこの粒度分布を
得て既に粉末化されているときは、岩石の採掘、粗砕、
原料乾燥、粉砕の工程が不要となり、従来の造粒型軽量
骨材の製造工程に比べて、工程が簡略化できるにもかか
わらず、得られる骨材性能は同等である。Further, the production of the conventional granulated lightweight aggregate is as follows.
Mining of rock, crushing, drying of raw materials, mixing after crushing, granulation, drying, and firing were performed, but when this particle size distribution is obtained as dust and it has already been pulverized, rock mining and crushing ,
The steps of drying and pulverizing the raw materials are not necessary, and the obtained aggregate performance is the same, although the steps can be simplified as compared with the conventional production process of a granulated lightweight aggregate.
【００２６】また、アルカリ物質としても高価なものを
利用する必要がなく、汎用の水ガラス、炭酸ナトリウ
ム、水酸化ナトリウム、炭酸カリウムのうち１種又は２
種以上の混合物を用いることができるので、通常の人工
軽量骨材の製造工程をそのまま利用することができる。Further, it is not necessary to use an expensive alkaline substance, and one or two of general-purpose water glass, sodium carbonate, sodium hydroxide and potassium carbonate can be used.
Since a mixture of one or more kinds can be used, the usual manufacturing process of artificial lightweight aggregate can be used as it is.
Claims (4)
岩ダスト、黒曜石ダスト粉末の単味又は、これらの混合
物にアルカリ物質を添加して造粒し、乾燥後加熱発砲さ
せ、人工軽量骨材を得ることを特徴とするパーライト製
造時に発生するダストの有効利用方法。1. An artificial lightweight aggregate is prepared by adding an alkaline substance to a mixture of pearlite dust and obsidian dust powder generated during the production of perlite, or a mixture thereof, granulating the mixture, and heating and firing after drying. A method for effectively utilizing dust generated during the production of perlite, which is characterized by being obtained.
各々粒径１００μｍ以下の粉末が１００重量％かつ２０
μｍより大きい粒径が３０重量％以上であることを特徴
とする特許請求の範囲１項記載のパーライト製造時に発
生するダストの有効利用方法。2. A powder of pearlite dust and obsidian dust,
100% by weight of powder having a particle size of 100 μm or less and 20
The method for effectively utilizing the dust generated during the production of perlite according to claim 1, characterized in that the particle size larger than μm is 30% by weight or more.
ウム、水酸化ナトリウム、炭酸カリウムのうち１種又は
２種以上の混合物であることを特徴とする特許請求範囲
１項または２項記載のパーライト製造時に発生するダス
トの有効利用方法。3. The production of perlite according to claim 1 or 2, wherein the alkaline substance is one or a mixture of two or more of water glass, sodium carbonate, sodium hydroxide and potassium carbonate. How to effectively utilize the dust that is sometimes generated.
％かつ２０μｍより大きい粒径が３０重量％以上に調整
した真珠岩ダスト、黒曜石ダストの単味又は、これらの
混合物に、水ガラス、炭酸ナトリウム、水酸化ナトリウ
ム、炭酸カリウムのうち１種又は２種以上のアルカリ物
質を添加して造粒し、乾燥後９００〜１３００℃で加熱
発砲させることを特徴とする人工軽量骨材の製造方法。4. A simple substance of pearlite dust, obsidian dust or a mixture thereof in which 100% by weight of powder having a particle size of 100 μm or less and 30% by weight or more of a particle size of 20 μm or more are mixed with water glass and sodium carbonate. A method for producing an artificial lightweight aggregate, which comprises adding one or more alkaline substances selected from sodium hydroxide and potassium carbonate, granulating the mixture, drying the mixture, and heating and firing the mixture at 900 to 1300 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8733095A JPH08259288A (en) | 1995-03-20 | 1995-03-20 | Method for effectively utilizing dust generated at the time of production of perlite and production of artificial lightweight aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8733095A JPH08259288A (en) | 1995-03-20 | 1995-03-20 | Method for effectively utilizing dust generated at the time of production of perlite and production of artificial lightweight aggregate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08259288A true JPH08259288A (en) | 1996-10-08 |
Family
ID=13911869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8733095A Pending JPH08259288A (en) | 1995-03-20 | 1995-03-20 | Method for effectively utilizing dust generated at the time of production of perlite and production of artificial lightweight aggregate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08259288A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009161388A (en) * | 2007-12-29 | 2009-07-23 | Taiheiyo Materials Corp | High flow light weight mortar composition |
| PL423475A1 (en) * | 2017-11-16 | 2019-05-20 | Politechnika Lodzka | Method for producing granular pearlite from the waste pearlite |
| PL424941A1 (en) * | 2018-03-19 | 2019-09-23 | Politechnika Łódzka | Method for producing granular material from the waste pearlite |
-
1995
- 1995-03-20 JP JP8733095A patent/JPH08259288A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009161388A (en) * | 2007-12-29 | 2009-07-23 | Taiheiyo Materials Corp | High flow light weight mortar composition |
| PL423475A1 (en) * | 2017-11-16 | 2019-05-20 | Politechnika Lodzka | Method for producing granular pearlite from the waste pearlite |
| PL424941A1 (en) * | 2018-03-19 | 2019-09-23 | Politechnika Łódzka | Method for producing granular material from the waste pearlite |
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