JPH0925155A - Sintered body from coal ash as source material and its production - Google Patents
Sintered body from coal ash as source material and its productionInfo
- Publication number
- JPH0925155A JPH0925155A JP7195746A JP19574695A JPH0925155A JP H0925155 A JPH0925155 A JP H0925155A JP 7195746 A JP7195746 A JP 7195746A JP 19574695 A JP19574695 A JP 19574695A JP H0925155 A JPH0925155 A JP H0925155A
- Authority
- JP
- Japan
- Prior art keywords
- ash
- raw material
- weight
- sintered body
- coal ash
- 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.)
- Granted
Links
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、石炭灰、すなわち石
炭灰フライアッシュを主原料とする焼結体およびその製
造方法に関するものであり、一層詳細には、道路舗装用
としての保水性と透水性をもつ舗道ブロック、あるいは
多孔質の特性を生かした水質浄化材、植生基板材などの
ような地球環境の改善に役立つ製品を造り出すことので
きる焼結体およびその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sintered body using coal ash, that is, coal ash fly ash as a main raw material, and a method for producing the same. More specifically, the present invention relates to water retention and water permeability for road pavement. TECHNICAL FIELD The present invention relates to a sintered body capable of producing a product useful for improving the global environment, such as a pavement block having properties, a water purification material utilizing a porous property, a vegetation substrate material, and the like, and a method for producing the same.
【０００２】[0002]
【従来の技術】石炭灰、すなわちフライアッシュは、石
炭火力発電所から年間約５００万トンという膨大な量が
排出されており、その多くがセメント原料として使用さ
れている。また、このフライアッシュはセメント原料の
他にも、下層路盤材とか、稲作の床土としての人工培
土、あるいは苛性加里、塩基性苦土を加えて焼成した珪
酸加里肥料などの製造にも使われており、さらにはフラ
イアッシュを焼結体とし、人工軽量骨材などの建設材料
として利用することも開発されている。2. Description of the Related Art Coal ash, or fly ash, is discharged from a coal-fired power plant in an enormous amount of about 5 million tons per year, and most of it is used as a raw material for cement. This fly ash is used not only as a raw material for cement, but also for the production of lower roadbed materials, artificial cultivated soil as a floor for rice cultivation, or silicic acid fertilizer baked with caustic and basic masonry. In addition, it has been developed to use fly ash as a sintered body and use it as a construction material such as artificial lightweight aggregate.
【０００３】このフライアッシュは略球状に凝集された
ガラス質でＳｉＯ2 とＡｌ2 Ｏ3 を主成分とする標準的
な珪酸組成物であり、陶磁器質焼結体を製造する原料と
しては理想的な原料と考えられている。従って、数十年
来、タイルや瓦、煉瓦などへの使用研究が試みられ、数
多くの特許出願もなされているが、未だ本格的な工業製
品として使用されている例はほとんど見られない。そし
てその理由は、フライアッシュ中に存在する約３〜５重
量％の炭素質にあると考えられる。[0003] This fly ash is a glassy material which is agglomerated in a substantially spherical shape and is a standard silicate composition containing SiO 2 and Al 2 O 3 as main components, and is ideal as a raw material for producing a ceramic sintered body. Is considered a raw material. Therefore, for several decades, research on use for tiles, tiles, bricks, and the like has been attempted, and a number of patent applications have been filed. However, there are hardly any examples used as full-scale industrial products. And the reason is believed to be about 3-5% by weight of carbonaceous present in fly ash.
【０００４】すなわち、フライアッシュは、その生成過
程において、溶融し、凝集する際に粒子内部に微量の炭
素を封入した状態でガラス化されると共に、表面層に
は、部分的に反応固着したと考えられる炭素質が強固に
付着する。そして、これらのフライアッシュを原料とし
て成形し焼成した製品は、その表面層に付着している炭
素質は酸化により消失するが、製品芯部の炭素質は容易
に酸化されず、いわゆる「ブラックコアー」として残存
する。そしてこれらの表面層とブラックコアー層を取出
して、吸水率、強度、熱膨張率などの物性を測定してみ
ると、それらの間に大きい差違が認められる。これらの
表面層とブラックコアー層との間の物性の差異は、特に
焼成過程において大きい内部歪の形成の原因となり、製
品表面層に多数の亀裂が発生する結果となる。従って、
石炭灰を利用して実用的な陶磁器質焼結体を造るために
は、焼結体の芯部におけるブラックコアーの形成を阻止
する必要がある。焼結体中のブラックコアーの形成を阻
止する方法としては、焼成時間を長くすることが考えら
れる。しかし、例えば石炭灰を主原料として成形、乾燥
そして焼結して、厚さ３０ｍｍのタイルをブラックコア
ーの無い状態で得ようとすると、少なくとも２０時間以
上の加熱が必要であり、経済性を著しく低下させる。す
なわち、厚さが大きい製品を焼成する際、芯部への熱伝
達には数十時間を必要とするものである。[0004] That is, fly ash melts and agglomerates in the process of its production, vitrifies with a small amount of carbon encapsulated inside the particles, and partially reacts and adheres to the surface layer. Possible carbonaceous material adheres firmly. The product obtained by molding and baking these fly ash as a raw material loses the carbonaceous material adhering to the surface layer by oxidation, but the carbonaceous material of the product core is not easily oxidized, so-called “black core”. ". When the surface layer and the black core layer are taken out and physical properties such as water absorption, strength, and coefficient of thermal expansion are measured, a great difference is observed between them. These differences in physical properties between the surface layer and the black core layer result in the formation of large internal strains, particularly during the firing process, resulting in numerous cracks in the product surface layer. Therefore,
In order to produce a practical ceramic sintered body using coal ash, it is necessary to prevent the formation of a black core in the core of the sintered body. As a method for preventing the formation of the black core in the sintered body, it is conceivable to lengthen the firing time. However, for example, when forming, drying and sintering using coal ash as a main raw material to obtain a tile having a thickness of 30 mm without a black core, heating for at least 20 hours or more is required, and the economic efficiency is significantly reduced. Lower. That is, when baking a product having a large thickness, heat transfer to the core requires several tens of hours.
【０００５】[0005]
【発明が解決しようとする課題】そこでこの発明では、
石炭灰を主原料とした焼結体であって、その芯部にブラ
ックコアーを実質的に有することのない焼結体を提供す
ることを目的とするものであり、特に本発明は、石炭灰
を主原料とし、経済性の高い製法で得られる焼結体であ
って、その芯部にブラックコアーを実質的に有すること
のない焼結体を提供することを主な目的とする。Therefore, in the present invention,
It is an object of the present invention to provide a sintered body containing coal ash as a main raw material and having substantially no black core in a core portion thereof. The main object of the present invention is to provide a sintered body which is obtained by a highly economical production method using as a main raw material, and has substantially no black core at its core.
【０００６】[0006]
【課題を解決するための手段】本発明は、石炭灰フライ
アッシュとクリンカーアッシュとを両者の合計量で５０
〜８５重量％、粘土質原料と水硬性セメントとを両者の
合計量で１５〜３０重量％（ただし、水硬性セメントは
粘土質原料１重量部に対して、０．３〜０．５重量部の
範囲の量で調合する）、そして焼結調整材料０〜２０重
量％を加えた原料組成物を成形乾燥した後、焼成してな
る石炭灰を原料とする焼結体にある。上記の原料組成物
中で、クリンカーアッシュは、石炭灰フライアッシュと
クリンカーアッシュとの合計量に対して３０〜７０重量
％を占める量で用いられることが好ましい。According to the present invention, coal ash fly ash and clinker ash are combined in a total amount of 50%.
８５85% by weight, the total amount of the clay-based raw material and the hydraulic cement is 15-30% by weight (however, the hydraulic cement is 0.3-0.5 parts by weight based on 1 part by weight of the clay-based raw material) And a raw material composition to which 0 to 20% by weight of a sintering adjusting material has been added, molded, dried, and then fired to obtain a sintered body using coal ash as a raw material. In the above raw material composition, clinker ash is preferably used in an amount occupying 30 to 70% by weight based on the total amount of coal ash fly ash and clinker ash.
【０００７】本発明の石炭灰を原料とする焼結体は、上
記原料組成物を使用して成形し、乾燥したのち、焼成過
程に於いてＣａＯを含むアルカリ性水蒸気による水熱反
応過程を経て１０００〜１２００℃の温度に焼成するこ
とを特徴とする製造方法により有利に製造することがで
きる。The sintered body of the present invention using coal ash as a raw material is formed using the raw material composition described above, dried, and then subjected to a hydrothermal reaction process with alkaline steam containing CaO in a firing process to obtain a sintered product of 1000. It can be advantageously manufactured by a manufacturing method characterized by firing at a temperature of about 1200 ° C.
【０００８】本発明は、原料コストの低い石炭灰フライ
アッシュを主原料としながらも、その焼成に際して、ク
リンカーアッシュ、粘度質原料、そしてポルトランドセ
メントなどの水硬性セメントを併用した原料組成物とす
ることによって、高い経済性で、芯部にブラックコアー
が殆ど形成されない焼結体を得ることができるという本
発明者の新規な知見に基づいて完成されたものである。[0008] The present invention provides a raw material composition comprising coal ash fly ash, which has a low raw material cost, as a main raw material, and which is combined with clinker ash, a viscous raw material, and a hydraulic cement such as Portland cement. Thus, the present invention has been completed on the basis of the inventor's novel finding that a sintered body in which a black core is hardly formed on a core can be obtained with high economic efficiency.
【０００９】本発明の焼結体の原料組成物のうちで水硬
性セメントは２０重量％〜３０重量％の結晶水を含む水
和化合物であり、加熱によって２５０℃付近から約５０
０℃迄の温度範囲で連続的に脱水反応が起こる。そし
て、その脱水により、水硬性セメントから発生する水蒸
気は少量のＣａＯを含むｐＨ約１０以上のアルカリ性の
水蒸気である。一方、フライアッシュ粒子に固着した炭
素質の酸化作用は、炭素の燃焼開始時期に、有効な量の
水蒸気の存在する事が必要な条件である。In the raw material composition of the sintered body of the present invention, hydraulic cement is a hydrated compound containing 20% by weight to 30% by weight of water of crystallization.
The dehydration reaction occurs continuously in a temperature range up to 0 ° C. The water vapor generated from the hydraulic cement by the dehydration is an alkaline water vapor containing a small amount of CaO and having a pH of about 10 or more. On the other hand, the oxidizing action of the carbonaceous matter fixed to the fly ash particles is a condition that requires an effective amount of water vapor to be present at the time of starting combustion of carbon.
【００１０】上記の原料組成物を焼成すると、ガラス質
フライアッシュの粒子とＣａＯを含むアルカリ性の熱水
蒸気はポゾラン反応を起こして、粒子表面にゲル状の水
和物を生成する際、粒子表面に固着した炭素を剥離さ
せ、容易に酸化される状態にする。なお、フライアッシ
ュに含まれる炭素量と水蒸気の量との関係は研究したと
ころ、炭素含有量とほぼ同量（重量比）の結晶水に於
て、ブラックコアーを消失させることが可能であった。
本発明の焼結体の原料組成物に用いる水硬性セメントの
例として、ポルトランドセメント、高炉セメント、フラ
イアッシュセメント、アルミナセメント、あるいはこれ
らのセメントの硬化物を粉砕した微粉末を挙げることが
できる。これらの水硬性セメントは組合せて用いてもよ
い。When the above raw material composition is fired, particles of glassy fly ash and alkaline hot water vapor containing CaO cause a pozzolanic reaction to form a gel-like hydrate on the surface of the particles. The adhered carbon is peeled off so that it is easily oxidized. The relationship between the amount of carbon contained in fly ash and the amount of water vapor was studied. As a result, it was possible to eliminate black cores in crystallization water having almost the same amount (by weight) as the carbon content. .
Examples of the hydraulic cement used for the raw material composition of the sintered body of the present invention include Portland cement, blast furnace cement, fly ash cement, alumina cement, and fine powder obtained by pulverizing a cured product of these cements. These hydraulic cements may be used in combination.
【００１１】本発明の焼結体の原料組成物の粘土質は、
原料組成物の粉末成形において最も経済的で、かつ有効
な作用をするが、焼成過程に於ては大きい収縮を起こす
などの欠点のあるものである。また、石炭灰のように熱
エネルギーをもつ炭素質を含むものは、効果的な酸素の
供給があると、芯部の炭素質が燃焼し、そこから温度が
上昇して焼成時間の短縮となるものであるが、粘土質を
成形材料として緻密に成形されたものは、炭素の燃焼開
始の３５０〜４００℃では粘土の収縮により緻密化が更
に進み、炉内からの酸素の吸収は殆ど期待できない。The clay of the raw material composition for the sintered body of the present invention is:
It is most economical and effective in powder molding of a raw material composition, but has drawbacks such as a large shrinkage in the firing process. In the case of coal ash containing carbonaceous material having thermal energy, the carbonaceous material in the core burns when there is an effective supply of oxygen, and the temperature rises from there, shortening the firing time. However, in the case of densely molded clay-based molding material, at 350 to 400 ° C. at the start of carbon combustion, densification further progresses due to shrinkage of the clay, and absorption of oxygen from the furnace can hardly be expected. .
【００１２】しかし、本発明の焼結体の原料組成物で
は、クリンカーアッシュを併用することにより、炉内か
らの酸素の吸収を高めることができた。すなわち、クリ
ンカーアッシュは多孔質で、およそ０．２〜２０μの孔
隙構造を持つものであるところから、焼結過程におい
て、焼結が進行している成形体の内部に外部（炉内）か
らの酸素の供給を円滑にする機能を有する。なお、クリ
ンカーアッシュは、製品として焼結体においても、高い
保水性や透水性を示し、またバクテリア担体としての効
果が期待できるものである。However, in the raw material composition for a sintered body of the present invention, the absorption of oxygen from the furnace could be enhanced by using clinker ash together. That is, since clinker ash is porous and has a pore structure of about 0.2 to 20 μm, during the sintering process, the inside of the molded body in which sintering is progressing is formed from outside (inside the furnace). It has the function of smoothing the supply of oxygen. Clinker ash exhibits high water retention and water permeability even in a sintered product as a product, and can be expected to have an effect as a bacterial carrier.
【００１３】なお、本発明の焼結体の原料組成物には、
必要に応じて高炉水滓スラグのような焼結調整材料を２
０重量％以内の量で加えてもよい。The raw material composition for a sintered body of the present invention includes:
If necessary, use a sintering adjustment material such as blast furnace slag slag.
It may be added in an amount within 0% by weight.
【００１４】すなわち、本発明の原料組成物では、その
水硬性セメントが（更に詳しく言えば、その水和物
が）、焼成過程における芯部の炭素質の効果的な脱離
と、燃焼を可能とし、また多孔質のクリンカーアッシュ
は、外部からの酸素の供給を円滑にすることによって、
炭素質の燃焼を助け、そして粘土質は、成形材料の形成
を容易にするのみでなく、クリンカーアッシュととも
に、焼成体の収縮率の減少、変形、亀裂の防止に有効な
作用を及ぼす。That is, in the raw material composition of the present invention, the hydraulic cement (more specifically, the hydrate) enables effective desorption and burning of the carbonaceous material in the core during the firing process. And, the porous clinker ash, by smoothing the supply of oxygen from the outside,
Clay aids the formation of the molding material, as well as aids the combustion of the carbonaceous material, and, together with the clinker ash, has an effective effect on reducing the shrinkage, deformation and cracking of the fired body.
【００１５】なお、上記の原料組成物の焼成過程におい
てフライアッシュ表面にポラゾン反応によって生成され
たゲル状のＳｉＯ2 −Ａｌ2 Ｏ3 −ＣａＯ等の化合物
は、従来の陶磁器質焼結体の焼結反応過程ではなかった
高温度の水熱反応によって生成されるものであって、そ
れぞれの原料間の反応は、全く新しい焼結反応機構を示
し、強固な効果的な固相反応を短時間に達成し、アノル
サイト（ＣａＯ・Ａｌ2Ｏ2 ・２ＳｉＯ2 ）を結晶相と
し、しかも微細な気孔を均一に分散した構造をもつ焼成
体を形成させる。The compound such as gel SiO 2 —Al 2 O 3 —CaO generated by the porazone reaction on the fly ash surface during the firing process of the raw material composition is used to heat the conventional ceramic sintered body. It is produced by a high-temperature hydrothermal reaction that was not a sintering reaction process, and the reaction between each raw material shows a completely new sintering reaction mechanism, enabling a strong and effective solid-phase reaction in a short time. Thus, a fired body having anorthite (CaO.Al 2 O 2 .2SiO 2 ) as a crystal phase and having a structure in which fine pores are uniformly dispersed is formed.
【００１６】そして、従来一般の陶磁器質焼結体である
建築用練瓦は焼成焼結過程における反応時に発生した気
泡か気孔となってなるインクボトル構造を持つもので、
気孔の連結性が少ないが、本発明の焼結体は、連結され
た毛細気孔から成るものである。そして従来の建築用煉
瓦と同等の吸水率を示した本発明の焼結体を、その吸水
特性について比較すると以下の表１に示すとおりであっ
た。[0016] Conventionally, the building tile, which is a general ceramic sinter, has an ink bottle structure in which bubbles or pores generated during the reaction in the firing and sintering process are formed.
Although the connectivity of pores is low, the sintered body of the present invention is composed of connected capillary pores. Table 1 below shows a comparison of the water absorption characteristics of the sintered bodies of the present invention showing the same water absorption as conventional building bricks.
【００１７】[0017]
【表１】 表１ ─────────────────────────── 吸水率 吸水飽和度 ─────────────────────────── 建築用煉瓦 １２．５重量％ ７１．０重量％ 本発明焼結体 １３．０重量％ ８７．５重量％ ─────────────────────────── 上記の表１の結果から、本発明の焼結体の高い水分保持
性能がわかる。[Table 1] Table 1 水 Water absorption rate Water absorption saturation ──────────── ─────────────── Building brick 12.5 wt% 71.0 wt% Sintered body of the present invention 13.0 wt% 87.5 wt% ───────か ら From the results in Table 1 above, it can be seen that the sintered body of the present invention has high moisture retention performance.
【００１８】また、本発明の焼結体を、土質工学会基準
Ｊ．ＳＦ．Ｔ．１５１によるＰＦ試験により毛管吸引効
果を測定したところ、水頭１ｍ（ＰＦ２）までは体積含
水率は殆ど変化のない安定なもので、シルト土壌の特性
に近い保水性を示すものであった。Further, the sintered body of the present invention can be prepared according to JSJ standards. SF. T. When the capillary suction effect was measured by a PF test according to 151, the volumetric water content was stable with almost no change up to a water head of 1 m (PF2), and exhibited water retention close to the characteristics of silt soil.
【００１９】[0019]
原料組成物：下記の表２に記載 試験体のサイズ：３００ｍｍ×３００ｍｍ×３０ｍｍ 成形条件：成形水分８重量％、成形圧力２００ｋｇ／ｃ
ｍ2 焼成：ローラーハースキン使用 焼成温度：１１５０℃ 常温から１０００℃迄の昇温速度：１５℃／分 １０００〜１１５０迄の昇温速度：５℃／分 得られた焼結体の物性：下記の表２に記載する。Raw material composition: described in Table 2 below Size of test piece: 300 mm x 300 mm x 30 mm Molding conditions: Molding water 8% by weight, molding pressure 200 kg / c
m 2 Firing roller Her skin using sintering temperature: 1150 heating rate ° C. from room temperature up to 1000 ° C.: heating rate up to 15 ° C. / min 1000-1150: the 5 ° C. / min obtained sintered body properties: following Table 2 below.
【００１９】[0019]
【表２】 表２ ─────────────────────────────── 原料組成（重量％） 試料１ 試料２ 試料３ ─────────────────────────────── フライアッシュ（微粉） ３０ ４５ ５５ クリンカーアッシュ ４０ ４０ ３０ （０．５〜１ｍｍ） 高炉セメント ３ ５ ５ 木節粘土 １０ １０ １０ 高炉水滓スラグ（微粉） １７ ── ── ─────────────────────────────── 得られた焼結体の物性 ─────────────────────────────── かさ比重（ｇ／ｃｃ） １．４５ １．４８ １．５０ 吸水率（重量％） １９．２ １８．３ １６．５ 曲げ強度（ｋｇ／ｃｍ2 ） ７８ １１５ １３５ 吸水飽和度（重量％） ９０．５ ９２ ９１ 透水係数（ｃｍ／秒） ６×10-3 １×10-4 ２５×10-4 体積含水率（％） ４１ ４０．５ ４０[Table 2] Raw material composition (% by weight) Sample 1 Sample 2 Sample 3 ────────────────────────────── Fly ash (fine powder) 30 45 55 Clinker ash 40 40 30 (0.5 to 1 mm) Blast furnace cement 3 5 5 Kibushi clay 10 10 10 Blast furnace slag slag (fine powder) 17 ── ── ───────────────────────────物 Physical properties of the obtained sintered body ─────────────────────────────── Bulk specific gravity (g / cc) 1.45 1.48 1.50 water absorption (wt%) 19.2 18.3 16.5 flexural strength (kg / cm 2) 78 115 135 water saturation (wt%) 90.5 92 91 permeability The number (cm / sec) 6 × 10 -3 1 × 10 -4 25 × 10 -4 volumetric water content (%) 41 40.5 40
【００２０】上記の結果から、本発明の焼結体の優れた
物性が明らかである。なお、得られた焼結体のいずれに
おいても、ブラックコアーの存在は観察されなかった。From the above results, the excellent physical properties of the sintered body of the present invention are clear. In addition, in any of the obtained sintered bodies, the presence of the black core was not observed.
【００２１】[0021]
１）本発明に係る焼結体を利用した保水性と透水性を兼
ね備えた高強度の舗装材料は、地球環境において、水資
源の保護と共に気化熱による地球温暖防止効果が期待す
ることができる。 ２）また、従来は陶磁器焼結体の製造に際しては、石炭
灰は、その中に存在する炭素質に起因して形成されるブ
ラックコアーのため、少量しか使用できなかったが、本
発明により見いだされた新しい焼結反応機構により、含
有率が最高８５重量％に及ぶ主原料としての使用が可能
となり、また従来使用されなかったクリンカーアッシュ
の気孔特性を効果的に利用する技術も確立することがで
きた。 ３）年間５００万トンもの発生量をもち、更に増大が予
想される石炭灰の利用開発は産業界の願望であり、本発
明の焼結体への利用により付加価値の高い商品の製造が
可能となった。1) A high-strength pavement material having both water retention and water permeability using the sintered body according to the present invention can be expected to protect water resources and prevent global warming due to heat of vaporization in the global environment. 2) Also, conventionally, when producing a ceramic sintered body, only a small amount of coal ash could be used due to the black core formed due to the carbonaceous material present therein, but it has been found according to the present invention. The new sintering reaction mechanism enables the use as a main raw material with a content of up to 85% by weight and establishes a technology to effectively utilize the pore characteristics of clinker ash, which has not been used before. did it. 3) The development and development of the use of coal ash, which generates 5 million tons per year and is expected to increase further, is a desire of the industry, and the use of the present invention in the sintered body enables the production of high value-added products. It became.
Claims (5)
シュとを両者の合計量で５０〜８５重量％、粘土質原料
と水硬性セメントとを両者の合計量で１５〜３０重量％
（ただし、水硬性セメントは粘土質原料１重量部に対し
て、０．３〜０．５重量部の範囲の量で調合する）、そ
して焼結調整材料０〜２０重量％を加えた原料組成物を
成形乾燥した後、焼成してなる石炭灰を原料とする焼結
体。1. A coal ash fly ash and clinker ash in a total amount of 50 to 85% by weight, and a clay raw material and a hydraulic cement in a total amount of 15 to 30% by weight.
(However, the hydraulic cement is prepared in an amount in the range of 0.3 to 0.5 part by weight with respect to 1 part by weight of the clay raw material), and the raw material composition obtained by adding 0 to 20% by weight of the sintering adjustment material A sintered body made from coal ash obtained by molding, drying and firing a product.
シュとクリンカーアッシュとの合計量に対して３０〜７
０重量％を占める請求項１に記載の石炭灰を原料とする
焼結体。2. The method according to claim 1, wherein the amount of clinker ash is 30 to 7 with respect to the total amount of coal ash fly ash and clinker ash.
The sintered body of claim 1 occupying 0% by weight.
０ｍｍに粉砕整粒された粗粒物である請求項１に記載の
石炭灰を原料とする焼結体。3. The clinker ash has a particle size of 0.5 to 3.
The sintered body using coal ash as a raw material according to claim 1, which is a coarse-grained material pulverized and sized to 0 mm.
ト、高炉セメント、フライアッシュセメント、アルミナ
セメント及びこれらのセメントの硬化物を粉砕した微粉
末のいずれかである請求項１に記載の石炭灰を原料とす
る焼結体。4. The coal ash as a raw material according to claim 1, wherein the hydraulic cement is any one of Portland cement, blast furnace cement, fly ash cement, alumina cement and fine powder obtained by crushing a hardened product of these cements. Sintered body.
シュとを両者の合計量で５０〜８５重量％、粘土質原料
と水硬性セメントとを両者の合計量で１５〜３０重量％
（ただし、水硬性セメントは粘土質原料１重量部に対し
て、０．３〜０．５重量部の範囲の量で調合する）、そ
して焼結調整材料０〜２０重量％を加えた原料組成物を
成形し、乾燥した後、焼成過程に於てＣａＯを含むアル
カリ性水蒸気による水熱反応過程を経て１０００〜１２
００℃の温度に焼成することを特徴とする焼結体の製造
方法。5. A coal ash fly ash and clinker ash in a total amount of 50 to 85% by weight, and a clay raw material and a hydraulic cement in a total amount of 15 to 30% by weight.
(However, the hydraulic cement is prepared in an amount in the range of 0.3 to 0.5 part by weight with respect to 1 part by weight of the clay raw material), and the raw material composition obtained by adding 0 to 20% by weight of the sintering adjustment material The product is formed and dried, and then subjected to a hydrothermal reaction process with alkaline steam containing CaO in a firing process to form a product of 1000 to 12
A method for producing a sintered body, characterized by firing at a temperature of 00 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7195746A JP2756934B2 (en) | 1995-07-10 | 1995-07-10 | Sinter from coal ash as raw material and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7195746A JP2756934B2 (en) | 1995-07-10 | 1995-07-10 | Sinter from coal ash as raw material and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0925155A true JPH0925155A (en) | 1997-01-28 |
| JP2756934B2 JP2756934B2 (en) | 1998-05-25 |
Family
ID=16346284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7195746A Expired - Fee Related JP2756934B2 (en) | 1995-07-10 | 1995-07-10 | Sinter from coal ash as raw material and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2756934B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6419740B2 (en) | 2000-02-03 | 2002-07-16 | Kabushiki Kaisha Kobe Seiko Sho. | Water-permeable solid material and manufacturing method therefor |
| JP2010535696A (en) * | 2007-08-03 | 2010-11-25 | エアシブ・インコーポレーテッド | Porous body and method |
| CN103342541A (en) * | 2013-05-10 | 2013-10-09 | 苏州工业园区方圆金属制品有限公司 | Novel thermal-insulated and energy-saving decorative ceramic tile |
| US9511345B1 (en) | 2009-04-08 | 2016-12-06 | Errcive, Inc. | Substrate fabrication |
| CN113372130A (en) * | 2021-06-21 | 2021-09-10 | 湖南国发控股有限公司 | Foamed ceramic produced by fly ash and commercial concrete mixing plant waste and preparation method thereof |
| CN113461434A (en) * | 2021-07-23 | 2021-10-01 | 大唐同舟科技有限公司 | High-strength ceramsite fired by using coal-fired solid waste and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4488404B2 (en) * | 2003-08-08 | 2010-06-23 | 株式会社不動テトラ | Porous sintered pavement material and manufacturing method thereof |
-
1995
- 1995-07-10 JP JP7195746A patent/JP2756934B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6419740B2 (en) | 2000-02-03 | 2002-07-16 | Kabushiki Kaisha Kobe Seiko Sho. | Water-permeable solid material and manufacturing method therefor |
| JP2010535696A (en) * | 2007-08-03 | 2010-11-25 | エアシブ・インコーポレーテッド | Porous body and method |
| US9511345B1 (en) | 2009-04-08 | 2016-12-06 | Errcive, Inc. | Substrate fabrication |
| CN103342541A (en) * | 2013-05-10 | 2013-10-09 | 苏州工业园区方圆金属制品有限公司 | Novel thermal-insulated and energy-saving decorative ceramic tile |
| CN103342541B (en) * | 2013-05-10 | 2014-08-27 | 苏州市涵信塑业有限公司 | Novel thermal-insulated and energy-saving decorative ceramic tile |
| CN113372130A (en) * | 2021-06-21 | 2021-09-10 | 湖南国发控股有限公司 | Foamed ceramic produced by fly ash and commercial concrete mixing plant waste and preparation method thereof |
| CN113461434A (en) * | 2021-07-23 | 2021-10-01 | 大唐同舟科技有限公司 | High-strength ceramsite fired by using coal-fired solid waste and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2756934B2 (en) | 1998-05-25 |
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