JPS63182248A - Manufacture of inorganic board - Google Patents
Manufacture of inorganic boardInfo
- Publication number
- JPS63182248A JPS63182248A JP1154787A JP1154787A JPS63182248A JP S63182248 A JPS63182248 A JP S63182248A JP 1154787 A JP1154787 A JP 1154787A JP 1154787 A JP1154787 A JP 1154787A JP S63182248 A JPS63182248 A JP S63182248A
- Authority
- JP
- Japan
- Prior art keywords
- fly ash
- slag
- magnesium hydroxide
- weight
- strength
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 14
- 239000000347 magnesium hydroxide Substances 0.000 claims description 14
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 14
- 239000010881 fly ash Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 5
- -1 pulp Substances 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 238000009472 formulation Methods 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 2
- 239000010425 asbestos Substances 0.000 claims description 2
- 239000010451 perlite Substances 0.000 claims description 2
- 235000019362 perlite Nutrition 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000002956 ash Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 235000010216 calcium carbonate Nutrition 0.000 description 3
- 229910000213 hydrogarnet Inorganic materials 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 235000014380 magnesium carbonate Nutrition 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910019440 Mg(OH) Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005273 aeration Methods 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
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は無ａ質板の製造方法に関し、詳しくはフライ
アッシュ−スラグ−セメント又は消石灰系の配合におけ
る無機質板の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing an aluminium-free board, and more particularly to a method for manufacturing an inorganic board in a fly ash-slag-cement or slaked lime-based formulation.
フライアッシュ、スラグは掻めて大量に発生する産業廃
棄物である。これらは非常に低価格である上、品質はか
なり安定しており、その有効利用が大きな問題としてン
主目されている。Fly ash and slag are industrial wastes that are generated in large quantities by scraping. These are extremely low-priced and of fairly stable quality, and their effective use is a major issue.
上記フライアッシュの主成分は５ｉＯｔ （６０〜５０
χ）並びにＡ＋ｘｏｘ（２５〜２６χ）であり、ＳｉＯ
２を多量に含むためセメントにセメントの一部に代喚さ
せる目的で添加することが知られているが、その代換率
は２０χが限度である。The main component of the above fly ash is 5iOt (60~50
χ) and A+xox(25~26χ), and SiO
Since it contains a large amount of 2, it is known that it is added to cement for the purpose of converting it into a part of the cement, but the substitution rate is limited to 20χ.
この理由はフライアッシュがＡｌｇ（ｈを多量に含むた
め余剰アルミナによるハイドロガーネットが生成され、
このハイドロガーネットが粗大結晶であるため反応硬化
体に膨張破壊が生じ、このため成形品強度が著しく低下
すると考えられる。The reason for this is that fly ash contains a large amount of Alg (h), so hydrogarnet is generated from excess alumina.
Since this hydrogarnet is a coarse crystal, expansion failure occurs in the reaction-cured product, which is thought to significantly reduce the strength of the molded product.
・かかる問題を解消することを目的として、例えば特開
昭５９−９２９５６号公報、同５９−９２９５７号公報
に開示されているようにフライアッシュ−セメント系組
成物に水酸化マグネシウムを添加することによって成形
板材の曲げ強度を向上させることが提案されている。- In order to solve this problem, for example, by adding magnesium hydroxide to a fly ash-cement composition as disclosed in JP-A-59-92956 and JP-A-59-92957. It has been proposed to improve the bending strength of formed plate materials.
しかしながら、上記従来技術においてフライアッシュの
利用が可能とされても、もう一つの産業廃棄物であるス
ラグの有効利用については不明であり、セメント等の代
換物としてフライアッシュ−スラグを大量に使用した場
合、成形品の曲げ強度等がどのようになるかは問題であ
る。However, even if it is possible to use fly ash in the above conventional technology, it is unclear how to effectively utilize slag, which is another industrial waste, and fly ash-slag is used in large quantities as a substitute for cement, etc. In this case, the question is what will happen to the bending strength of the molded product.
この発明は上記問題点に鑑み、セメント代換物として大
量のフライアッシュ−スラグを用いた場合、成形品に充
分な曲げ強度を発現させ、もって実用強度に至らしめる
無機質板の製造方法を得ることを目的としてなされたも
のである。In view of the above-mentioned problems, the present invention aims to provide a method for manufacturing an inorganic board that allows a molded product to exhibit sufficient bending strength and thereby reach practical strength when a large amount of fly ash-slag is used as a cement substitute. It was made for the purpose of
即ち、この発明の無機質板の製造方法は、フライアンシ
ュとスラグの合計量が少なくとも５０重量％以上とされ
たフライア・νシュースラグーセメント又は消石灰系の
配合において、水酸化マグネシウムを２〜１５重量％及
びパルプ、石綿、パーライト等の必要な添加物を所定量
それぞれ添加した組成物を水の存在下で板状に成形し、
該成形体を養生硬化することを特徴とするものである。That is, the method for manufacturing an inorganic board of the present invention involves adding 2 to 15% by weight of magnesium hydroxide in a blend of Flyer-v shoe slag cement or slaked lime, in which the total amount of flyash and slag is at least 50% by weight. % and necessary additives such as pulp, asbestos, perlite, etc. are added in predetermined amounts, and the composition is formed into a plate shape in the presence of water,
This method is characterized in that the molded body is aged and hardened.
この発明において使用する水酸化マグネシウムには、マ
グネサイト鉱滓、炭酸マグネシウム化合物を１０００℃
前後又は、それ以下の温度で焼成した、主成分がＭｇＯ
から成るものを使用できる。Magnesium hydroxide used in this invention includes magnesite slag and magnesium carbonate compound at 1000°C.
Main component is MgO, fired at around or below temperature.
You can use something consisting of:
このものは水と反応してＭｇ （ＯＨ）、の形態で硬化
反応系に寄与する。This substance reacts with water and contributes to the curing reaction system in the form of Mg (OH).
さらに、水酸化マグネシウムの代りにＭ ｇ （Ｏｆ（
） ｚ／ＣａＣ０：＋の重量比が７７、〜３／、の水酸
化マグネシウム−炭酸カルシウムの混合物を用いること
も出来る。Furthermore, instead of magnesium hydroxide, M g (Of(
) It is also possible to use a mixture of magnesium hydroxide and calcium carbonate having a weight ratio of z/CaC0:+ of 77.about.3/.
この水酸化マグネシウム−炭酸カルシウム化合物は、海
水から水酸化マグネシウムを製造する過程で、海水中の
炭酸イオンを石灰乳で不溶性の炭酸カルシウムにして除
去する時、過剰の石灰乳とＭｇＣｌ２ との反応によっ
て得られる。In the process of producing magnesium hydroxide from seawater, this magnesium hydroxide-calcium carbonate compound is produced by the reaction between excess milk of lime and MgCl2 when carbonate ions in seawater are removed by making insoluble calcium carbonate with milk of lime. can get.
上記化合物は、水酸化マグネシウムの低コスト化を図る
ことが出来、都合が良い。The above compound is convenient because it can reduce the cost of magnesium hydroxide.
なお、Ｍ ｇ （ＯＨ） ２ ／ＣａＣ０ｚの重量比を
ｆｆ／、、４八とする理由は３／、以下では後述のよう
にハイドロガーネットの生成抑止効果が乏しく、かつＣ
ａＣ０ａ量増大による硬化体の強度低下が顕著となり７
八以上では水酸化マグネシウムの製造コストが著しく向
上する反面、添加による強化効果が得られないか、逆に
低下する場合が有るからである。The reason why the weight ratio of M g (OH) 2 /CaC0z is set to ff/,,48 is 3/.
As the amount of aC0a increased, the strength of the cured product decreased significantly.7
This is because, while the production cost of magnesium hydroxide increases significantly when the content is 8 or more, the reinforcing effect due to addition may not be obtained or may even be reduced.
次に、フライアッシュは、微粉炭燃焼ボイラーの排ガス
中に含有されている灰の微粉粒子を捕集したものの他、
流動床燃焼灰を用いることもできる。Next, fly ash is made by collecting fine particles of ash contained in the exhaust gas of pulverized coal-fired boilers.
Fluidized bed combustion ash can also be used.
この流動床燃焼灰は流動床燃焼炉で発生するもので燃焼
温度が７００℃〜９００℃と低く、脱硫剤としてＣａＣ
０＊と石炭粉を混合して燃焼させる方式で得られる燃焼
灰を言う。This fluidized bed combustion ash is generated in a fluidized bed combustion furnace and has a low combustion temperature of 700°C to 900°C, and CaC is used as a desulfurizing agent.
This refers to the combustion ash obtained by mixing and burning 0* and coal powder.
上述の＾１□０．を大量に含む物質を配合した混合原料
に対し水酸化マグネシウムを配合すると成形品の曲げ強
度が著しく増大させ得ることが本発明者らの実験により
確認された。Above ^1□0. It has been confirmed through experiments by the present inventors that the bending strength of molded products can be significantly increased by adding magnesium hydroxide to a mixed raw material containing a large amount of substances.
上記強度発現は圧力１０ｋｇ／ｃｄ以上の裔温高圧水渾
気による水熱反応を生じさせた場合の他、これよりさら
に低圧の水蒸気圧における蒸気養生でも著しく曲げ強度
の向上が図られることが判明した。It has been found that the above strength is developed not only when a hydrothermal reaction is caused by high-pressure water aeration with a pressure of 10 kg/cd or more, but also when steam curing at an even lower steam pressure can significantly improve the bending strength. did.
この強度発現の原因は定かではないが、Ｍｇ（ＯＨ）ｇ
がハイドロガーネット生成の抑止剤として作用している
ものと考えられる。The cause of this strength development is not clear, but Mg(OH)g
is thought to act as an inhibitor of hydrogarnet formation.
なお、上記水酸化マグネシウムの添加量は、本発明者の
実験によれば組成物に対し、２〜１５重量％が好適であ
り、２重量％より少ないと充分な強度向上が得られず、
また１５重量％より多いと、かえって強度が低下する傾
向が見られる。According to the inventor's experiments, the amount of magnesium hydroxide added is preferably 2 to 15% by weight based on the composition, and if it is less than 2% by weight, sufficient strength improvement cannot be obtained.
On the other hand, if the amount is more than 15% by weight, the strength tends to decrease on the contrary.
また、水酸化マグネシウムとしてＭ ｇ （ＯＨ）ｚ
／ＣａＣＯ３を用いた場合は該化合物中のＭ ｇ （Ｏ
ｆｔ） ｚの含量に着目し、Ｍ ｇ （ＯＨ） ｚ ／
ＣａＣＯ５の添加量が２〜３０重量％とされる。Also, as magnesium hydroxide, M g (OH)z
/CaCO3, M g (O
ft) Focusing on the content of z, M g (OH) z /
The amount of CaCO5 added is 2 to 30% by weight.
次にこの発明の詳細な説明する。 Next, this invention will be explained in detail.
（実施例１）
微粉炭燃焼ボイラーより得たフライアッシュを用い、表
１の配合により水の添加下において厚さ５１、長さ１ｍ
、幅４５１の試験板を成形し、オ−トクレープで養生後
、これらの曲げ強度（ｋｇ／Ｃｌ１１）、吸水率及び絶
乾比重を測定したところ、表１下欄に示す結果が得られ
た。(Example 1) Using fly ash obtained from a pulverized coal-fired boiler and adding water according to the formulation shown in Table 1, it was made to a thickness of 51 m and a length of 1 m.
A test plate having a width of 451 mm was formed, and after curing in an autoclave, the bending strength (kg/Cl11), water absorption rate, and absolute dry specific gravity of the plate were measured, and the results shown in the lower column of Table 1 were obtained.
また、水酸化マグネシウムの添加量と曲げづ重度との相
関をグラフで示すと第１図のようになり、水酸化マグネ
シウムの添加量を２〜１５重量％とすることが好適であ
ることが判明した。In addition, a graph showing the correlation between the amount of magnesium hydroxide added and the degree of bending is shown in Figure 1, and it was found that it is preferable to add the amount of magnesium hydroxide in the range of 2 to 15% by weight. did.
表１
（配合値は重量％、曲げ強度・・・ｋｇ ／ ｃｔＡ
）（実施例２）
次に実施例１で用いたフライアッシュに換え表２に示す
組成の流動床燃焼灰を用い実施例１と同様にして試験機
を成形しオートフレイブ養生後、試験を行ったところ表
３下欄に示す結果が得られた。Table 1 (Blend values are weight%, bending strength...kg/ctA
) (Example 2) Next, a test machine was molded in the same manner as in Example 1 using fluidized bed combustion ash having the composition shown in Table 2 instead of the fly ash used in Example 1, and after autoflave curing, a test was conducted. However, the results shown in the lower column of Table 3 were obtained.
表２
表３
〔効果〕
この発明は以上説明したように、フライアッシュとスラ
グを大量に含む無機質板であっても充分な強度が発現出
来、フライアッシュ、スラグの作動利用が図れるのであ
る。Table 2 Table 3 [Effects] As explained above, in this invention, even an inorganic board containing a large amount of fly ash and slag can exhibit sufficient strength, and the fly ash and slag can be utilized for operation.
第１図はこの発明の方法により得た無機質板材の強度試
験結果を示すグラフである。FIG. 1 is a graph showing the strength test results of inorganic plate materials obtained by the method of the present invention.
Claims (1)
０重量％以上とされたフライアッシュ−スラグ−セメン
ト又は消石灰系の配合において、水酸化マグネシウムを
２〜１５重量％及びパルプ、石綿、パーライト等の必要
な添加物を所定量それぞれ添加した組成物を水の存在下
で板状に成形し、該成形体を養生硬化することを特徴と
する無機質板の製造方法。(1) The total amount of fly ash and slag is at least 5
In a fly ash-slag-cement or slaked lime-based formulation with a content of 0% by weight or more, a composition in which 2 to 15% by weight of magnesium hydroxide and a predetermined amount of necessary additives such as pulp, asbestos, and perlite are added. 1. A method for producing an inorganic plate, which comprises forming the inorganic plate into a plate shape in the presence of water, and curing and hardening the formed body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1154787A JPS63182248A (en) | 1987-01-20 | 1987-01-20 | Manufacture of inorganic board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1154787A JPS63182248A (en) | 1987-01-20 | 1987-01-20 | Manufacture of inorganic board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63182248A true JPS63182248A (en) | 1988-07-27 |
Family
ID=11780986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1154787A Pending JPS63182248A (en) | 1987-01-20 | 1987-01-20 | Manufacture of inorganic board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63182248A (en) |
-
1987
- 1987-01-20 JP JP1154787A patent/JPS63182248A/en active Pending
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