JP2003012354A - Method for producing artificial lightweight aggregate - Google Patents
Method for producing artificial lightweight aggregateInfo
- Publication number
- JP2003012354A JP2003012354A JP2001192838A JP2001192838A JP2003012354A JP 2003012354 A JP2003012354 A JP 2003012354A JP 2001192838 A JP2001192838 A JP 2001192838A JP 2001192838 A JP2001192838 A JP 2001192838A JP 2003012354 A JP2003012354 A JP 2003012354A
- Authority
- JP
- Japan
- Prior art keywords
- kiln
- aggregate
- raw material
- artificial lightweight
- lightweight aggregate
- 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
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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
- C04B20/06—Expanding clay, perlite, vermiculite or like granular materials
- C04B20/061—Expanding clay, perlite, vermiculite or like granular materials in rotary kilns
-
- 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
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、人工軽量骨材の製
造方法に関し、特に、トンネルキルンとロータリーキル
ンとを併用して人工軽量骨材を製造する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an artificial lightweight aggregate, and more particularly to a method for producing an artificial lightweight aggregate by using a tunnel kiln and a rotary kiln together.
【０００２】[0002]
【従来の技術】未燃焼の炭質物を含むフライアッシュを
原料とし、あるいは、有機系の界面活性剤を添加した原
料を造粒し、得られた骨材原料を焼成して人工軽量骨材
を製造する場合がある。焼成過程において、骨材原料中
に未燃焼の炭質物が残留したまま発泡させると、骨材の
強度は低下し、吸水率が増加するばかりでなく、骨材の
比重、吸水率、強度の偏差が大きくなる。従って、高品
質の人工軽量骨材を製造するためには、発泡温度より低
温域で可燃性の物質を燃焼させなければならない。2. Description of the Prior Art Fly ash containing unburned carbonaceous material is used as a raw material, or a raw material to which an organic surfactant is added is granulated, and the obtained aggregate raw material is fired to produce an artificial lightweight aggregate. May be manufactured. When the unburned carbonaceous material remains in the raw material of the aggregate during the firing process and is foamed, the strength of the aggregate decreases, not only the water absorption rate increases but also the specific gravity, water absorption rate and strength deviation of the aggregate. Grows larger. Therefore, in order to produce a high quality artificial lightweight aggregate, it is necessary to burn a combustible substance at a temperature lower than the foaming temperature.
【０００３】ペレット中の炭質物の燃焼速度は、酸素の
拡散速度及び雰囲気の酸素濃度に依存する。酸素の拡散
速度は、ペレットにおける通気性の空隙率と雰囲気温度
とに依存する。高品質の無機発泡体を製造するには、発
泡温度に達する前に十分に焼結させて緻密化する必要が
ある。緻密化すると、ペレットの通気性空隙率が低下す
るため、炭質物の燃焼速度は極端に低下する。従って、
緻密化する温度より低温で炭質物を燃焼させることが実
用的である。The burning rate of carbonaceous material in pellets depends on the diffusion rate of oxygen and the oxygen concentration in the atmosphere. The diffusion rate of oxygen depends on the air permeability of the pellet and the ambient temperature. To produce a high quality inorganic foam, it must be fully sintered and densified before the foaming temperature is reached. When densified, the breathable porosity of the pellets decreases, and the burning rate of the carbonaceous material extremely decreases. Therefore,
It is practical to burn carbonaceous matter at a temperature lower than the densification temperature.
【０００４】また、ペレットの通気性空隙率が同一で、
かつ、雰囲気の酸素濃度が同一の場合には、酸化速度
は、温度の増加に対して指数関数的に増加する。従っ
て、短時間に炭質物の燃焼を行わせるには、できるだけ
高い酸素濃度雰囲気で、緻密化する温度よりやや低温で
保持することが必要である。Also, the air permeability of the pellets is the same,
Moreover, when the oxygen concentration of the atmosphere is the same, the oxidation rate increases exponentially with increasing temperature. Therefore, in order to burn the carbonaceous material in a short time, it is necessary to maintain the oxygen concentration atmosphere as high as possible and slightly lower than the densification temperature.
【０００５】従来、人工軽量骨材の製造にあたっては、
例えば、特公昭６２−２４３７０号公報、特開平１１−
２６３６４８号公報等に記載のように、ロータリーキル
ンを使用することが多い。ロータリーキルンが広く利用
される理由は、キルンの回転により、すべての骨材原料
を均質に加熱することができ、かつ、融着防止材を添加
することで、骨材同士の融着を防止することができる機
能を有しているためである。Conventionally, in the manufacture of artificial lightweight aggregate,
For example, JP-B-62-24370 and JP-A-11-
A rotary kiln is often used as described in Japanese Patent No. 263648. The reason why the rotary kiln is widely used is that the rotation of the kiln can heat all the aggregate raw materials uniformly, and the addition of a fusion preventing material prevents the fusion of aggregates. This is because it has a function that enables
【０００６】[0006]
【発明が解決しようとする課題】しかし、ロータリーキ
ルンは、骨材原料の均質加熱、及び骨材同士の融着防止
の面では優れるが、キルン内の温度を自由に制御するこ
とが困難であるため、未燃焼の炭質物を燃焼させる装置
としては、必ずしも適当ではない。また、装置が大型化
すると、キルン内でのペレットの積層が厚くなるため、
炭質物等の可燃物の酸化速度は遅くなる。さらに、積層
の厚さが同じであっても、ペレットのサイズが大きくな
ると、酸化速度は遅くなる。However, although the rotary kiln is excellent in homogeneous heating of aggregate raw materials and prevention of fusion of aggregates, it is difficult to freely control the temperature inside the kiln. However, it is not always suitable as a device for burning unburned carbonaceous matter. In addition, as the size of the equipment increases, the stacking of pellets in the kiln becomes thicker,
The rate of oxidation of combustible materials such as carbonaceous materials becomes slow. Moreover, the oxidation rate slows down as the pellet size increases, even for the same stack thickness.
【０００７】そこで、ロータリーキルンを使用して炭質
物等の可燃物を燃焼させるためには、（１）ペレットの
流速を低下させる。（２）キルンの充填率を小さくす
る。（３）過剰の燃焼空気を吹き込んで酸化を促進す
る。（４）キルン長を長くする。（５）キルン内にリフ
ターを設けてペレットと酸素の会合率を増加させる等の
方法があり、これらの中のいくつかを併用しなければな
らない。しかし、（１）及び（２）の方法は、生産効率
を低下させ、（３）の方法は、熱効率を低下させ、
（４）の方法は、キルンの敷地面積を大きくし、（５）
の方法は、ペレットの破損を生じさせる等の問題があ
る。Therefore, in order to burn combustible materials such as carbonaceous materials using a rotary kiln, (1) the flow velocity of pellets is reduced. (2) Reduce the filling rate of the kiln. (3) Blow excess combustion air to promote oxidation. (4) Increase the kiln length. (5) There are methods such as providing a lifter in the kiln to increase the association rate of pellets and oxygen, and some of these must be used in combination. However, the methods (1) and (2) reduce the production efficiency, and the method (3) lowers the thermal efficiency.
The method of (4) increases the site area of the kiln, and (5)
The method (1) has problems such as damage to the pellet.
【０００８】そこで、本発明は、上記従来の人工軽量骨
材の製造方法における問題点に鑑みてなされたものであ
って、生産効率及び熱効率を低下させることなく、設備
の敷地面積を小さく押さえることができ、ペレットの破
損を生じさせることなく、高品質の人工軽量骨材を製造
することのできる人工軽量骨材の製造方法を提供するこ
とを目的とする。Therefore, the present invention has been made in view of the problems in the above-mentioned conventional method for manufacturing an artificial lightweight aggregate, and can reduce the site area of equipment without lowering the production efficiency and the thermal efficiency. Therefore, it is an object of the present invention to provide a method for producing an artificial lightweight aggregate, which is capable of producing a high-quality artificial lightweight aggregate without causing damage to pellets.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するた
め、請求項１に記載の発明は、人工軽量骨材の製造方法
であって、骨材原料に含まれる可燃物の燃焼をトンネル
キルンを用いて行い、該トンネルキルンから排出された
骨材原料の焼成をロータリーキルンを用いて行うことを
特徴とする。In order to achieve the above-mentioned object, the invention according to claim 1 is a method for producing an artificial lightweight aggregate, in which a combustible material contained in an aggregate raw material is burned in a tunnel kiln. It is characterized in that the aggregate raw material discharged from the tunnel kiln is fired using a rotary kiln.
【００１０】そして、請求項１に記載の発明によれば、
トンネルキルンは、可燃物の燃焼に適した温度領域を長
く形成することができるため、骨材原料に含まれる可燃
物の燃焼を効率的に行うことができる。その後、ロータ
リーキルンで骨材原料を焼成することにより、骨材原料
を均質に加熱するとともに、骨材同士の融着を防止しな
がら、緻密化と発泡とを行う。これによって、高品質の
人工軽量骨材を連続して製造することができる。According to the invention described in claim 1,
Since the tunnel kiln can form a long temperature range suitable for the combustion of the combustible material, the combustible material contained in the aggregate raw material can be efficiently combusted. Then, by firing the aggregate raw material in a rotary kiln, the aggregate raw material is uniformly heated and, while preventing fusion between the aggregates, densification and foaming are performed. As a result, high-quality artificial lightweight aggregate can be continuously manufactured.
【００１１】請求項２に記載の発明は、請求項１に記載
の人工軽量骨材の製造方法の好ましい一形態として、骨
材原料に含まれる可燃物の８０重量％以上の燃焼をトン
ネルキルンを用いて行うことを特徴とする。According to a second aspect of the present invention, as a preferred embodiment of the method for producing an artificial lightweight aggregate according to the first aspect, a tunnel kiln is used for burning 80% by weight or more of combustible substances contained in an aggregate raw material. It is characterized by performing using.
【００１２】請求項３に記載の発明は、請求項１または
２に記載の人工軽量骨材の製造方法において、前記トン
ネルキルンにおける骨材原料に含まれる可燃物の燃焼
を、前記ロータリーキルンからの燃焼ガスを利用して行
うことを特徴とする。According to a third aspect of the present invention, in the method for producing an artificial lightweight aggregate according to the first or second aspect, the combustible material contained in the aggregate raw material in the tunnel kiln is burned from the rotary kiln. Characterized by using gas.
【００１３】請求項３に記載の発明によれば、ロータリ
ーキルンの燃焼ガスを有効に利用することができ、人工
軽量骨材の製造に要するエネルギーコストを低減するこ
とができる。According to the third aspect of the invention, the combustion gas of the rotary kiln can be effectively used, and the energy cost required for manufacturing the artificial lightweight aggregate can be reduced.
【００１４】請求項４に記載の発明は、請求項１または
２に記載の人工軽量骨材の製造方法において、前記トン
ネルキルンは、骨材原料を載置してロータリーキルンま
で輸送する耐熱金属製メッシュベルトと、該ベルト上の
骨材原料に前記ロータリーキルンからの燃焼ガスを案内
する気流制御板を備えることを特徴とする。A fourth aspect of the present invention is the method for manufacturing an artificial lightweight aggregate according to the first or second aspect, wherein the tunnel kiln is made of a heat-resistant metal mesh on which an aggregate raw material is placed and transported to a rotary kiln. A belt and an air flow control plate for guiding combustion gas from the rotary kiln to the aggregate raw material on the belt are provided.
【００１５】請求項４に記載の発明によれば、耐熱金属
製メッシュベルト上の骨材原料をより効率的に乾燥し、
可燃物を燃焼させることができ、人工軽量骨材の製造に
要するエネルギーコストをさらに低減することができ
る。According to the invention of claim 4, the aggregate raw material on the heat-resistant metal mesh belt is more efficiently dried,
The combustible material can be burned, and the energy cost required for manufacturing the artificial lightweight aggregate can be further reduced.
【００１６】請求項５に記載の発明は、請求項１、２ま
たは３に記載の人工軽量骨材の製造方法において、前記
トンネルキルンは、該キルン内部に、ローラーと、該ロ
ーラー上に耐火性板または耐火性容器とを備え、該耐火
性板または耐火性容器に前記骨材原料を載置または収容
して該キルン内部を移動させることを特徴とする。The invention according to claim 5 is the method for producing an artificial lightweight aggregate according to claim 1, 2 or 3, wherein the tunnel kiln has a roller inside the kiln, and a fire resistance on the roller. A plate or a refractory container is provided, and the aggregate raw material is placed or housed in the refractory plate or the refractory container and moved inside the kiln.
【００１７】請求項５に記載の発明によれば、いわゆる
ローラーハウスキルンを使用することにより、キルン内
の空間占有率を減少させ、熱効率をより向上させること
ができ、ローラーの交換頻度もベルトに比べて少なくな
って保守性も向上する。According to the invention described in claim 5, by using a so-called roller house kiln, the space occupancy in the kiln can be reduced, the thermal efficiency can be further improved, and the frequency of roller replacement in the belt can also be increased. Compared to this, it is less and the maintainability is improved.
【００１８】請求項６に記載の発明は、請求項１乃至５
のいずれかに記載の人工軽量骨材の製造方法において、
前記トンネルキルンは、骨材原料中の可燃物の燃焼を助
長する補助バーナーを備えることを特徴とする。The invention according to claim 6 is the same as claims 1 to 5.
In the method for manufacturing an artificial lightweight aggregate according to any one of,
The tunnel kiln is equipped with an auxiliary burner for promoting combustion of combustible materials in the aggregate raw material.
【００１９】請求項６に記載の発明によれば、ロータリ
ーキルンから供給される熱エネルギーが不十分な場合で
も、トンネルキルン内の温度制御を容易かつ安定して行
うことができ、トンネルキルンによる骨材原料に含まれ
る可燃物の燃焼をより効率的に行うことができる。According to the invention described in claim 6, even if the thermal energy supplied from the rotary kiln is insufficient, the temperature inside the tunnel kiln can be controlled easily and stably. Combustible substances contained in the raw material can be burned more efficiently.
【００２０】[0020]
【発明の実施の形態】次に、本発明にかかる人工軽量骨
材の製造方法の実施の形態の具体例を図面を参照しなが
ら説明する。BEST MODE FOR CARRYING OUT THE INVENTION Next, a specific example of an embodiment of a method for manufacturing an artificial lightweight aggregate according to the present invention will be described with reference to the drawings.
【００２１】従来の技術の欄で述べたように、未燃焼の
炭質物を含むフライアッシュ等を原料とし、あるいは、
有機系の界面活性剤を添加した原料を造粒し、得られた
骨材原料を焼成して高品質の人工軽量骨材を製造するに
は、発泡温度より低温域で可燃性の物質を燃焼させなけ
ればならず、緻密化する温度より低温で炭質物を燃焼さ
せることが実用的である。また、短時間に炭質物の燃焼
を行わせるには、できるだけ高い酸素濃度雰囲気で、緻
密化する温度よりやや低温で保持することが必要であ
る。As described in the section of the prior art, fly ash or the like containing unburned carbonaceous material is used as a raw material, or
To produce a high-quality artificial lightweight aggregate by granulating a raw material to which an organic surfactant has been added and firing the resulting aggregate raw material, burn a flammable substance at a temperature lower than the foaming temperature. It is practical to burn the carbonaceous material at a temperature lower than the densifying temperature. Further, in order to burn the carbonaceous material in a short time, it is necessary to maintain the oxygen concentration atmosphere as high as possible and slightly lower than the densification temperature.
【００２２】そこで、発明者は、これらの点に鑑みて鋭
意研究を重ねた結果、キルン内に燃焼に適した温度領域
を長く形成することが、骨材原料に含まれる可燃性の物
質を有効かつ積極的に燃焼させるために重要であり、従
来のロータリーキルンのみによる焼成ではなく、トンネ
ルキルンとロータリーキルンとを連結し、骨材原料に含
まれる可燃物の燃焼をトンネルキルンを用いて行い、そ
の後、ロータリーキルンを用いて骨材原料を焼成するこ
とによって、従来の問題点を解決しながら高品質の人工
軽量骨材を製造することができることを見い出した。Therefore, as a result of intensive studies conducted by the inventor in view of these points, forming a temperature range suitable for combustion in the kiln for a long time is effective for making the flammable substance contained in the aggregate raw material effective. And it is important to actively burn, instead of firing only by the conventional rotary kiln, the tunnel kiln and the rotary kiln are connected, and the combustible material contained in the aggregate raw material is burned using the tunnel kiln, and thereafter, It has been found that by firing an aggregate raw material using a rotary kiln, a high quality artificial lightweight aggregate can be manufactured while solving the conventional problems.
【００２３】トンネルキルンは、キルン内に、可燃物の
燃焼に適した温度領域を長く形成することができるた
め、効率良く骨材原料中の可燃物を燃焼させることがで
きる。しかし、トンネルキルンのみで骨材原料の発泡ま
で行わせようとすると、ペレットが軟化し、ペレット同
士が融着を起こすので、実用的ではない。そこで、トン
ネルキルンによって、８０重量％以上の可燃物の燃焼が
完了した骨材原料を、ロータリーキルンで均質に加熱
し、骨材同士の融着を防止しながら、緻密化と発泡を行
うことで、高品質の人工軽量骨材を連続して製造するこ
とができる。すなわち、トンネルキルンとロータリーキ
ルンの両キルンの特長を利用し、両者を組み合わせるこ
とで、効率的に高品質の人工軽量骨材を生産することが
できる。In the tunnel kiln, a temperature region suitable for burning combustible materials can be formed in the kiln for a long time, so that the combustible materials in the aggregate raw material can be efficiently burned. However, if it is attempted to foam the aggregate raw material only with the tunnel kiln, the pellets are softened and the pellets are fused together, which is not practical. Therefore, the aggregate raw material in which combustible substances of 80% by weight or more have been completely burned by the tunnel kiln is heated uniformly in the rotary kiln to prevent the fusion of the aggregates while performing densification and foaming. High quality artificial lightweight aggregate can be continuously manufactured. That is, by utilizing the features of both the tunnel kiln and the rotary kiln and combining them, it is possible to efficiently produce a high-quality artificial lightweight aggregate.
【００２４】以後、上記のことを踏まえて、本発明にか
かる人工軽量骨材の製造方法について詳細に説明する。Based on the above, the method for manufacturing the artificial lightweight aggregate according to the present invention will be described in detail below.
【００２５】図１は、本発明を実施するための設備の一
例を示し、この人工軽量骨材製造装置１は、１段目にト
ンネルキルン２を、２段目にロータリーキルン３を配置
し、トンネルキルン２によって、骨材原料に含まれる、
例えば、炭素重量換算で１〜５重量％の可燃物の燃焼を
行い、ロータリーキルン３によって、トンネルキルン２
から排出された骨材原料の焼成、すなわち、緻密化及び
発泡を行う。従って、焼成する人工軽量骨材の種類によ
って異なるが、トンネルキルン２内は、１００〜１１０
０℃に制御され、ロータリーキルン３内は、８００〜１
３００℃に制御される。FIG. 1 shows an example of equipment for carrying out the present invention. In this artificial lightweight aggregate manufacturing apparatus 1, a tunnel kiln 2 is arranged in the first stage and a rotary kiln 3 is arranged in the second stage, and a tunnel kiln is arranged. Included in the aggregate raw material by the kiln 2.
For example, a combustible material of 1 to 5 wt% in terms of carbon weight is burned, and a rotary kiln 3 is used to make a tunnel kiln 2
The aggregate raw material discharged from is fired, that is, densified and foamed. Therefore, depending on the type of artificial lightweight aggregate to be fired, the inside of the tunnel kiln 2 is 100-110.
It is controlled at 0 ℃, and the inside of rotary kiln 3 is 800-1
Controlled to 300 ° C.
【００２６】トンネルキルン２は、入口シュート１２か
ら供給されたペレットＰを載置し、ロータリーキルン３
まで輸送するための耐熱金属製メッシュベルト４と、ト
ンネルキルン２からの燃焼ガスを耐熱金属製メッシュベ
ルト４上のペレットＰに案内するための気流制御板５
と、トンネルキルン２内を可燃物の燃焼に適した温度に
なるように制御するための補助バーナー１１（１１Ａ〜
１１Ｃ）と、トンネルキルン２の排ガスを後段の図示し
ない集塵機等に導くための排気ダクト６と、ペレットＰ
をロータリーキルン３に供給するためシュート８とを備
える。The tunnel kiln 2 mounts the pellets P supplied from the inlet chute 12, and the rotary kiln 3
Heat-resistant metal mesh belt 4 for transporting to and the air flow control plate 5 for guiding combustion gas from the tunnel kiln 2 to the pellets P on the heat-resistant metal mesh belt 4.
And an auxiliary burner 11 (11A-) for controlling the inside of the tunnel kiln 2 to a temperature suitable for burning combustible materials.
11C), an exhaust duct 6 for guiding the exhaust gas from the tunnel kiln 2 to a dust collector or the like (not shown) in the subsequent stage, and a pellet P.
Is provided to the rotary kiln 3.
【００２７】また、ロータリーキルン３は、供給された
ペレットＰを発泡させるための熱、及びトンネルキルン
２でペレットＰの乾燥及び可燃物の燃焼に要する熱を供
給するバーナー９と、製品としての骨材を排出する骨材
排出部１０とを備える。骨材排出部１０の下流側には、
出口シュート１３が設けられる。Further, the rotary kiln 3 supplies heat for foaming the supplied pellets P and heat for drying the pellets P and burning combustible materials in the tunnel kiln 2, and an aggregate as a product. And an aggregate discharging section 10 for discharging the. On the downstream side of the aggregate discharge part 10,
An exit chute 13 is provided.
【００２８】そして、トンネルキルン２に供給されたペ
レットＰは、耐熱金属製メッシュベルト４上に載置さ
れ、トンネルキルン２内において乾燥され、可燃物が燃
焼した後、シュート８を介してロータリーキルン３に供
給され、ロータリーキルン３において、緻密化し、発泡
する。尚、図中の矢印は燃焼ガスの流れを示す。The pellets P supplied to the tunnel kiln 2 are placed on the heat-resistant metal mesh belt 4 and dried in the tunnel kiln 2 to burn combustible materials and then through the chute 8 to the rotary kiln 3 And is densified and foamed in the rotary kiln 3. The arrows in the figure indicate the flow of combustion gas.
【００２９】以上の要領で人工軽量骨材を製造すると、
トンネルキルン２で骨材原料に含まれる可燃物の燃焼を
効率的に行い、ロータリーキルン３で骨材原料を均質に
加熱するとともに、骨材同士の融着を防止しながら、緻
密化と発泡を行うため、高品質の人工軽量骨材を連続し
て製造することができ、従来のロータリーキルンのみに
よる焼成において発生した種々の問題を解決することが
できる。尚、ロータリーキルン３では、緻密化と発泡の
みを行わせるため、従来のロータリーキルンよりもキル
ン長を短くすることができる。When the artificial lightweight aggregate is manufactured according to the above procedure,
The tunnel kiln 2 efficiently burns combustible substances contained in the aggregate raw material, the rotary kiln 3 uniformly heats the aggregate raw material, and densifies and foams while preventing fusion between the aggregates. Therefore, it is possible to continuously manufacture high-quality artificial lightweight aggregates, and it is possible to solve various problems that have occurred in the conventional firing using only a rotary kiln. Since the rotary kiln 3 is only densified and foamed, the kiln length can be made shorter than that of the conventional rotary kiln.
【００３０】尚、上記実施例においては、トンネルキル
ン２の内部に耐熱金属製メッシュベルト４を配置した
が、その他に、トンネルキルン２の内部にレールを敷設
し、レール上を台車を用いて骨材原料を移動させる方法
を採用することもできる。また、トンネルキルンの一種
であるローラーハウスキルンを使用する方法もある。ロ
ーラーハウスキルンは、キルン内にローラーを備え、ロ
ーラーの上に耐火性の板（あるいは容器）を載置し、板
上または容器内にペレットを載せて移動させる。板等
は、回収して再利用しなければならないが、ベルトコン
ベアーよりも空間占有率を減少させ、熱効率をより向上
させることができ、ローラーの交換頻度もベルトに比べ
て少なくなるメリットがある。これらの方法では、ロー
タリーキルン３との連結部で熱損失が大きくなり、連結
部の機構が複雑になる等の欠点があるが、骨材原料中の
可燃物の燃焼に必要な温度領域を長くとることができる
ため有効である。Although the heat-resistant metal mesh belt 4 is arranged inside the tunnel kiln 2 in the above-mentioned embodiment, a rail is laid inside the tunnel kiln 2 and a bone is mounted on the rail using a trolley. It is also possible to adopt a method of moving the raw material. There is also a method of using a roller house kiln, which is a type of tunnel kiln. The roller house kiln has a roller inside the kiln, a fire-resistant plate (or container) is placed on the roller, and pellets are placed on the plate or in the container and moved. Plates and the like have to be collected and reused, but they have the advantages that the space occupancy rate can be reduced and the thermal efficiency can be further improved compared to the belt conveyor, and the frequency of roller replacement is less than that of the belt. These methods have drawbacks such as large heat loss at the joint with the rotary kiln 3 and a complicated mechanism of the joint, but the temperature range required for burning the combustible material in the aggregate raw material is long. It is effective because it can.
【００３１】[0031]
【発明の効果】以上説明したように、本発明によれば、
生産効率及び熱効率を低下させることなく、設備の敷地
面積を小さく押さえることができ、ペレットの破損を生
じさせることなく、高品質の人工軽量骨材を製造するこ
とのできる人工軽量骨材の製造方法を提供することがで
きる。As described above, according to the present invention,
A method for manufacturing an artificial lightweight aggregate that can suppress the site area of equipment without lowering production efficiency and thermal efficiency and can produce high-quality artificial lightweight aggregate without causing damage to pellets. Can be provided.
【図１】本発明にかかる人工軽量骨材の製造方法を実施
するための装置例を示す概略断面図である。FIG. 1 is a schematic cross-sectional view showing an example of an apparatus for carrying out the method for manufacturing an artificial lightweight aggregate according to the present invention.
１ 人工軽量骨材製造装置 ２ トンネルキルン ３ ロータリーキルン ４ 耐熱金属製メッシュベルト ５ 気流制御板 ６ 排気ダクト ８ シュート ９ バーナー １０ 骨材排出部 １１ （１１Ａ〜１１Ｃ） 補助バーナー １２ 入口シュート １３ 出口シュート 1 Artificial lightweight aggregate manufacturing equipment 2 tunnel kiln 3 rotary kiln 4 Heat-resistant metal mesh belt 5 Air flow control plate 6 exhaust duct 8 shoots 9 burners 10 Aggregate discharge part 11 (11A-11C) Auxiliary burner 12 entrance chute 13 Exit chute
Claims (6)
ネルキルンを用いて行い、該トンネルキルンから排出さ
れた骨材原料の焼成をロータリーキルンを用いて行うこ
とを特徴とする人工軽量骨材の製造方法。1. An artificial lightweight aggregate characterized in that a combustible material contained in an aggregate raw material is burned using a tunnel kiln, and the aggregate raw material discharged from the tunnel kiln is fired using a rotary kiln. Manufacturing method.
以上の燃焼をトンネルキルンを用いて行うことを特徴と
する請求項１に記載の人工軽量骨材の製造方法。2. 80% by weight of combustible substances contained in the aggregate raw material
The method for producing an artificial lightweight aggregate according to claim 1, wherein the above combustion is performed using a tunnel kiln.
含まれる可燃物の燃焼を、前記ロータリーキルンからの
燃焼ガスを利用して行うことを特徴とする請求項１また
は２に記載の人工軽量骨材の製造方法。3. The artificial lightweight aggregate according to claim 1, wherein the combustible material contained in the aggregate raw material in the tunnel kiln is burned using combustion gas from the rotary kiln. Production method.
してロータリーキルンまで輸送する耐熱金属製メッシュ
ベルトと、該ベルト上の骨材原料に前記ロータリーキル
ンからの燃焼ガスを案内する気流制御板とを備えること
を特徴とする請求項１、２または３に記載の人工軽量骨
材の製造方法。4. The tunnel kiln comprises a heat-resistant metal mesh belt on which aggregate raw materials are placed and transported to a rotary kiln, and an air flow control plate which guides the combustion gas from the rotary kiln to the aggregate raw materials on the belt. The method for producing an artificial lightweight aggregate according to claim 1, 2 or 3, further comprising:
に、ローラーと、該ローラー上に耐火性板または耐火性
容器とを備え、該耐火性板または耐火性容器に前記骨材
原料を載置または収容して該キルン内部を移動させるこ
とを特徴とする請求項１、２または３に記載の人工軽量
骨材の製造方法。5. The tunnel kiln comprises a roller inside the kiln, and a refractory plate or a refractory container on the roller, and the aggregate raw material is placed on the refractory plate or refractory container. The method for manufacturing an artificial lightweight aggregate according to claim 1, 2, or 3, wherein the kiln is housed and moved inside the kiln.
れる可燃物の燃焼を助長する補助バーナーを備えること
を特徴とする請求項１乃至５のいずれかに記載の人工軽
量骨材の製造方法。6. The method for manufacturing an artificial lightweight aggregate according to claim 1, wherein the tunnel kiln includes an auxiliary burner that promotes combustion of combustible substances contained in the aggregate raw material. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001192838A JP2003012354A (en) | 2001-06-26 | 2001-06-26 | Method for producing artificial lightweight aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001192838A JP2003012354A (en) | 2001-06-26 | 2001-06-26 | Method for producing artificial lightweight aggregate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003012354A true JP2003012354A (en) | 2003-01-15 |
Family
ID=19031231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001192838A Pending JP2003012354A (en) | 2001-06-26 | 2001-06-26 | Method for producing artificial lightweight aggregate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003012354A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008247641A (en) * | 2007-03-29 | 2008-10-16 | Reiseki:Kk | Light weight ceramic, heat insulating material consisting of the light weight ceramic and manufacturing method of the light weight ceramic |
Citations (3)
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|---|---|---|---|---|
| JPS5925746B2 (en) * | 1980-07-04 | 1984-06-20 | 株式会社神戸製鋼所 | Continuous granulation and sintering method for fly attachment |
| JPH01282137A (en) * | 1988-05-06 | 1989-11-14 | Kobe Steel Ltd | Operating method of moving grate-type calcining machine for artificial lightweight aggregate |
| JPH11209130A (en) * | 1998-01-22 | 1999-08-03 | Kamaike Yutaka | Manufacture of super-lightweight aggregate |
-
2001
- 2001-06-26 JP JP2001192838A patent/JP2003012354A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5925746B2 (en) * | 1980-07-04 | 1984-06-20 | 株式会社神戸製鋼所 | Continuous granulation and sintering method for fly attachment |
| JPH01282137A (en) * | 1988-05-06 | 1989-11-14 | Kobe Steel Ltd | Operating method of moving grate-type calcining machine for artificial lightweight aggregate |
| JPH11209130A (en) * | 1998-01-22 | 1999-08-03 | Kamaike Yutaka | Manufacture of super-lightweight aggregate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008247641A (en) * | 2007-03-29 | 2008-10-16 | Reiseki:Kk | Light weight ceramic, heat insulating material consisting of the light weight ceramic and manufacturing method of the light weight ceramic |
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