JPS5860634A - Preparation of granular air-bubble glass - Google Patents

Preparation of granular air-bubble glass

Info

Publication number
JPS5860634A
JPS5860634A JP15973481A JP15973481A JPS5860634A JP S5860634 A JPS5860634 A JP S5860634A JP 15973481 A JP15973481 A JP 15973481A JP 15973481 A JP15973481 A JP 15973481A JP S5860634 A JPS5860634 A JP S5860634A
Authority
JP
Japan
Prior art keywords
glass
powder
expansion
limestone
particles
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
Application number
JP15973481A
Other languages
Japanese (ja)
Inventor
Toshiaki Mizuno
俊明 水野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Sheet Glass Co Ltd
Original Assignee
Nippon Sheet Glass Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Sheet Glass Co Ltd filed Critical Nippon Sheet Glass Co Ltd
Priority to JP15973481A priority Critical patent/JPS5860634A/en
Publication of JPS5860634A publication Critical patent/JPS5860634A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C11/00Multi-cellular glass ; Porous or hollow glass or glass particles
    • C03C11/007Foam glass, e.g. obtained by incorporating a blowing agent and heating

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Glass Compositions (AREA)

Abstract

PURPOSE:To obtain light granular air-bubble glass having improved heat insulating properties and high strength, by using limestone powder as a blowing agent to be blended with glass powder, granulating a mixture of the glass powder and the blowing agent, subjecting it to expansion treatment at high temperature. CONSTITUTION:A raw material obtained by blending glass powder with 1.0- 10.0wt% limestone powder as a blowing agent is granulated, and heated at 810- 960 deg.C to give granular air-bubble glass. When amount of the imestone is below the lower limit, the expansion is insufficient, and when it is above the upper limit, the limestone is reacted with the glass, crystallized, and the shape of the expansion is not kept with ease. Glass powder not crystallizing at 810-960 deg.C and having such a viscosity range as to cause the melting at least at the surfaces of the particles and causing sintering of the particles with each other is preferred. Any granulation method is applied, the granulation is preferably carried out with water glass, etc. and the diameters of the particles are preferably <= about 10mm. because of rapid heating and cooling. When the expansion temperature is below the lower limit, the porosity ratio of the product is low, and when it is above the upper limit, the viscosity of the glass is reduced excessively and a light weight product is not obtd.

Description

【発明の詳細な説明】 本発明は粒状泡ガラスの製造方法に関する。[Detailed description of the invention] The present invention relates to a method for producing granular foam glass.

泡ガラスはガラス・マトリックス中に均一で独立又は連
続した気泡を持つガラス材料で、軽量、不燃性、断熱性
、加−L性等の点で有用な工業材料であり、これらの特
性をいかして不燃断熱材として使用されている。特に、
近年、その低温における断熱性および耐吸湿性がよいこ
となどから、極低温における断熱壁および床に使用され
ることが多くなってきた。
Foam glass is a glass material with uniform, independent or continuous cells in the glass matrix, and is a useful industrial material due to its light weight, nonflammability, heat insulation, and heat-adding properties. Used as non-combustible insulation material. especially,
In recent years, it has been increasingly used for insulating walls and floors at extremely low temperatures due to its good thermal insulation properties and moisture absorption resistance at low temperatures.

ガラス繊維等の通常の断熱材はその吸湿性のため、”A 但書での使用には耐えることができない0従来の泡ガラ
スの製造はガラス粉末に発泡剤を混ぜ、これを型枠に入
れ加熱炉で焼成および発泡させて成型体とした後、徐冷
するという方法が採られている。
Conventional foam glass manufacturing involves mixing glass powder with a foaming agent and placing it in a mold because of its hygroscopic nature. A method is adopted in which a molded product is formed by firing and foaming in a heating furnace, and then slowly cooled.

この製造方法で最大の問題となるのは発泡成型が終った
泡ガラス製品の徐冷にある。焼成された泡ガラス自身が
断熱材であるため、その徐冷には長時間必要であり、肉
厚が大きいものでは、24時間以上の徐冷時間が必要と
いわれ、そのために長大な徐冷炉と多数の型枠を要し、
またこのためにその製造コストが非常に高くなってしま
うよいう欠点がある。
The biggest problem with this manufacturing method is the gradual cooling of the foam glass product after foam molding. Since the fired foam glass itself is an insulating material, it takes a long time to slowly cool it, and it is said that thicker glass requires annealing time of 24 hours or more. It requires formwork of
This also has the disadvantage that the manufacturing cost becomes very high.

」=記欠点は製造するものの体積を減少させれば解決さ
れるものである。すなわち、最終製品の形状を小粒状と
した場合、発泡後の徐冷に問題はなくなり型枠も不要と
なるので、その製造コストも低くすることができる。ま
た、用途としても、すでに施工済の建物の壁、床あるい
は天井などに、その粒状泡ガラスが通過できる程度の穴
をあけて流し込むだけで、断熱材としての施工ができる
ことになり、その用途もさらに広がってくる。さらに、
粒状泡ガラスを骨材としてセメントなどと混合して複合
材を作ることで軽量でかつ断熱・°防音に優れた材料を
得ることができる。特にこの場合、従来の軽量骨材、例
えばパーライト粒ではモルタルと混合する時に、パーラ
イト粒の強度が不十分のため、粒が破砕する不都合が生
じるが、粒状泡ガラスは十分な強度を有することができ
る。
” = The disadvantages noted above can be resolved by reducing the volume of the product being manufactured. That is, when the final product is shaped into small particles, there is no problem with slow cooling after foaming and no mold is required, so the manufacturing cost can be reduced. In addition, it can be used as an insulating material by simply making holes large enough to allow the granular foam glass to pass through the walls, floors, or ceilings of buildings that have already been constructed. It will spread further. moreover,
By making a composite material by mixing granular foam glass with cement etc. as an aggregate, it is possible to obtain a material that is lightweight and has excellent heat and sound insulation properties. Particularly in this case, when conventional lightweight aggregates such as perlite grains are mixed with mortar, the strength of the pearlite grains is insufficient, causing the grains to break, but granular foam glass has sufficient strength. can.

本願発明の目的は軽量で断熱性に優れ、かつ大きな強度
を有する粒状泡ガラスを低コストで製造する方法を提供
することにあり、その要旨は石灰石粉末を発泡剤として
ガラス粉末と7.0〜/ 0.0重@%の割合で配合し
た原料を造粒し、それをざ10〜り乙O′Cで加熱する
ことを特徴とする粒状泡ガラスの製造方法である。
The purpose of the present invention is to provide a method for producing granular foam glass that is lightweight, has excellent heat insulation properties, and has high strength at a low cost. This is a method for producing granular foam glass, which is characterized by granulating raw materials blended at a ratio of 0.0% by weight and heating the granulated material at a temperature of 10°C to 20°C.

石灰石は純粋にはcaco3で示される化学式を持つも
ので、日本でも多量に産する。なお、石灰石には少量の
ドロマイトが含まれる場合もあるが、本発明には問題と
ならない。石灰石は産地により異なるが、大むね乙so
″Cがら反応がはじまり、ざ00°C前後でその分解反
応は急激に高くなる。
Limestone has the chemical formula caco3, and is produced in large quantities in Japan. Note that limestone may contain a small amount of dolomite, but this does not pose a problem for the present invention. Limestone varies depending on the production area, but it is mostly
The reaction begins with carbon, and the decomposition reaction rapidly increases at around 00°C.

すなわち、それ以上の温度においては分解反応はすみや
かに行なわれ、ごく短時間のうちにその反応が終了する
。また、石灰石は他の炭酸塩窯業原料、たとえばドロマ
イトに比較してその分解温度が高い。このことは、原料
がより高温まで分解せずに維持されることを意味してお
り、従って、高温で加熱することにより発泡が始まるま
でに原料中のガラス粉末の焼結が充分に行なえるので、
未焼結状態でのガスの抜けがなく発泡効率が上がりさら
にガラス相は充分焼結されているので強度も」−昇させ
ることができる。また、石灰石はドロマイトに較べて安
価で、その贅源も豊富に存在する。
That is, at temperatures above this temperature, the decomposition reaction occurs rapidly and is completed within a very short period of time. Additionally, limestone has a higher decomposition temperature than other carbonate ceramic raw materials, such as dolomite. This means that the raw material can be maintained without decomposition at higher temperatures, and therefore, by heating at high temperatures, the glass powder in the raw material can be sufficiently sintered before foaming begins. ,
Since no gas escapes in the unsintered state, the foaming efficiency is increased, and since the glass phase is sufficiently sintered, the strength can also be increased. In addition, limestone is cheaper than dolomite, and there are abundant sources of it.

越えるとガラスと反応して結晶化し、発泡形状維持が困
難となる。ガラス質粉末としては、ざ10〜q40 ’
Cの加熱温度範囲で、実質的な結晶化がなく、ガラス粉
末粒子の少なくとも表面部が溶融し、粒子と粒子とが焼
結するのに充分な粘度範囲にあれば、どんな組成のもの
でもよい。
If it exceeds it, it will react with the glass and crystallize, making it difficult to maintain the foamed shape. As a glassy powder, za10~q40'
Any composition may be used as long as there is no substantial crystallization in the heating temperature range of C, at least the surface portion of the glass powder particles melts, and the viscosity range is sufficient for sintering of the particles. .

好ましくは、価格、耐久性の点でピンガラスあるいは板
ガラス等のソーダ石灰ガラスが良い。またガラス粉末、
石灰石粉末の粒度は細かければ細かいほうがよ<、JI
S で3 s meshより細いのが好ましい。
Preferably, soda lime glass such as pin glass or plate glass is preferred in terms of cost and durability. Also glass powder,
The finer the particle size of limestone powder, the better.
It is preferable that S is thinner than 3 s mesh.

造粒の方法は、どんな方法でも粒状原料の強度の点から
室温造粒の場合には水ガラス等のパイングーを添加する
ことが好ましく、特にガラス粉末および石灰石粉末とお
しがち密に充てんされ、強度の大きい粒子が得られる造
粒法がよい。造粒粒子径としては急速に加熱・冷却を行
うので直径l0mm以下が好ましい。
Regardless of the granulation method, from the viewpoint of the strength of the granular raw materials, in the case of room temperature granulation, it is preferable to add pineapple such as water glass. A granulation method that yields large particles is preferred. The diameter of the granulated particles is preferably 10 mm or less since heating and cooling are performed rapidly.

加熱温度を前記範囲に限った理由は以下による。The reason why the heating temperature is limited to the above range is as follows.

すなわちざ/ 0 ’Cに達しない温度では、石灰石の
分解反応が遅いために、処理時間を長くさる必要があり
、かつガラス粉末の焼結も遅いので、ガラス粉末粒子の
隙間からガスが抜け、発泡終了後の製品の気孔率が低く
なる。
In other words, at temperatures below 0'C, the decomposition reaction of limestone is slow, requiring a longer treatment time, and the sintering of the glass powder is also slow, allowing gas to escape from the gaps between the glass powder particles. The porosity of the product after foaming is reduced.

また、そのような温度による処理ではガラス粉末どおし
が充分に焼結を完了していないので、そのような温度で
、製造された球状泡ガラスの強度は低い。9 g O’
Cを越えると、ガラス粉末の粘度が低下しすぎて、発生
したガスをとじ込めることができなくなり、軽量のもの
とはならない。また加熱する粒状原料は比較的小粒なの
で短時間の加熱で十分に内部まで発泡温度に到達し、逆
に長時間加熱すると内部までガラスの粘性が下ってしま
うので加熱時間としては73分以内が好ましい。
Furthermore, since the glass powders are not sufficiently sintered during treatment at such temperatures, the strength of the spherical foam glass produced at such temperatures is low. 9 g O'
If the glass powder exceeds C, the viscosity of the glass powder decreases too much and the generated gas cannot be trapped, resulting in a product that is not lightweight. In addition, since the granular raw material to be heated is relatively small, a short heating time is sufficient to reach the foaming temperature inside the glass, and on the other hand, heating for a long time will reduce the viscosity of the glass to the inside, so a heating time of 73 minutes or less is preferable. .

以Fに本発明の製造方法による実施例を示す。Examples using the manufacturing method of the present invention are shown below.

実施例/ ガラス質粉末として通常の建築用板ガラス粉末。Example/ Ordinary architectural sheet glass powder as a vitreous powder.

発泡剤として市販の石灰石粉末を用いた。両粉末とも一
〇〇メソシーの標準ふるいを通過するまで粉砕した後、
ガラス粉末り5重M%と石灰石粉末5重量%をアルミナ
製ボールミルで2時間混合して原料粉末とした。これを
直径が−o amのパン型造粒器で室温で造粒を行った
。その際のパイン熱で内部まで十分に発泡温度に到達し
、かつ発泡後の徐冷を不必要とする上に、短時間加熱で
あるから内部は発泡に都合のよい温度に維持したままで
表層部を更に高温度にまで昇温でき、発泡ガラスの表面
部のみを気孔の全く無いガラス質とすることができるの
で吸水率が極めて小さい発泡ガラスとすることができる
Commercially available limestone powder was used as a blowing agent. After grinding both powders until they pass through a 100 Mesosie standard sieve,
A raw material powder was prepared by mixing 5% by weight of glass powder and 5% by weight of limestone powder in an alumina ball mill for 2 hours. This was granulated at room temperature using a pan-shaped granulator with a diameter of -o am. At that time, the pine heat sufficiently reaches the foaming temperature to the inside, and there is no need for slow cooling after foaming, and since the heating is for a short time, the inside temperature is maintained at a temperature convenient for foaming while the surface layer is heated. Since the foamed glass can be heated to a higher temperature and only the surface portion of the foamed glass can be made of glass without any pores, the foamed glass can have an extremely low water absorption rate.

Claims (2)

【特許請求の範囲】[Claims] (1)ガラスの粉末に重量比で八〇〜10.0%の石灰
石粉末を混合した原料を造粒後1r10〜q40 ’C
で加熱することを特徴とする粒状泡ガラスの製造方法。
(1) After granulating the raw material, which is a mixture of glass powder and 80-10.0% limestone powder by weight, 1r10-q40'C.
A method for producing granular foam glass, characterized by heating it at
(2)上記加熱時間が75分以内である特許請求の範囲
第1項に記載の方法。
(2) The method according to claim 1, wherein the heating time is within 75 minutes.
JP15973481A 1981-10-07 1981-10-07 Preparation of granular air-bubble glass Pending JPS5860634A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15973481A JPS5860634A (en) 1981-10-07 1981-10-07 Preparation of granular air-bubble glass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15973481A JPS5860634A (en) 1981-10-07 1981-10-07 Preparation of granular air-bubble glass

Publications (1)

Publication Number Publication Date
JPS5860634A true JPS5860634A (en) 1983-04-11

Family

ID=15700099

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15973481A Pending JPS5860634A (en) 1981-10-07 1981-10-07 Preparation of granular air-bubble glass

Country Status (1)

Country Link
JP (1) JPS5860634A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0275144A2 (en) * 1987-01-14 1988-07-20 Kirin Beer Kabushiki Kaisha Method for producing granular multicellular glass and the glass produced by the method
JP2006143484A (en) * 2004-11-16 2006-06-08 Kazuo Kume Thermal insulating material and method of manufacturing the same
WO2011086024A1 (en) * 2010-01-12 2011-07-21 Liaver Gmbh & Co.Kg Method for producing expanded glass granules and expanded glass granules and the use thereof
CN102515467A (en) * 2012-01-04 2012-06-27 王增贵 Silicon raw material tailing granulated material, and preparation method and application thereof
EP2708517A1 (en) * 2012-09-13 2014-03-19 Binder + Co Aktiengesellschaft Method for the preparation of foamed glass and particles for carrying out such a method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0275144A2 (en) * 1987-01-14 1988-07-20 Kirin Beer Kabushiki Kaisha Method for producing granular multicellular glass and the glass produced by the method
US5039630A (en) * 1987-01-14 1991-08-13 Kirin Beer Kabushiki Kaisha Method for producing granular multi-cellular glass and the glass produced by the method
JP2006143484A (en) * 2004-11-16 2006-06-08 Kazuo Kume Thermal insulating material and method of manufacturing the same
WO2011086024A1 (en) * 2010-01-12 2011-07-21 Liaver Gmbh & Co.Kg Method for producing expanded glass granules and expanded glass granules and the use thereof
US9018139B2 (en) 2010-01-12 2015-04-28 Liaver Gmbh & Co. Kg Method for producing expanded glass granules and expanded glass granules and the use thereof
CN102515467A (en) * 2012-01-04 2012-06-27 王增贵 Silicon raw material tailing granulated material, and preparation method and application thereof
EP2708517A1 (en) * 2012-09-13 2014-03-19 Binder + Co Aktiengesellschaft Method for the preparation of foamed glass and particles for carrying out such a method

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