JPH0415186B2 - - Google Patents
Info
- Publication number
- JPH0415186B2 JPH0415186B2 JP56057278A JP5727881A JPH0415186B2 JP H0415186 B2 JPH0415186 B2 JP H0415186B2 JP 56057278 A JP56057278 A JP 56057278A JP 5727881 A JP5727881 A JP 5727881A JP H0415186 B2 JPH0415186 B2 JP H0415186B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- granules
- calcium oxide
- water
- tank
- 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.)
- Expired - Lifetime
Links
- 239000008187 granular material Substances 0.000 claims description 48
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 31
- 239000000292 calcium oxide Substances 0.000 claims description 31
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 16
- 238000006703 hydration reaction Methods 0.000 claims description 14
- 239000010881 fly ash Substances 0.000 claims description 12
- 230000036571 hydration Effects 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 3
- 230000009257 reactivity Effects 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 230000001747 exhibiting effect Effects 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 239000004576 sand Substances 0.000 description 11
- 239000006096 absorbing agent Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000004568 cement Substances 0.000 description 5
- 239000002360 explosive Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000005018 casein Substances 0.000 description 2
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 2
- 235000021240 caseins Nutrition 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- -1 calcium silicate Chemical class 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002918 waste heat 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- 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
- C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
-
- 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
- C04B2/00—Lime, magnesia or dolomite
- C04B2/02—Lime
- C04B2/04—Slaking
- C04B2/06—Slaking with addition of substances, e.g. hydrophobic agents ; Slaking in the presence of other compounds
- C04B2/066—Making use of the hydration reaction, e.g. the reaction heat for dehydrating gypsum; Chemical drying by using unslaked lime
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
Description
【発明の詳細な説明】
この発明は、酸化カルシウムを含有する物質と
水及びポゾラン反応性物質を混合し、この混合物
を粒状に形成し、さらに熱を加えて粒状物を製造
する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing granules by mixing a substance containing calcium oxide with water and a pozzolanic reactive substance, forming the mixture into granules, and applying heat.
水酸化カルシウム、砂及びポゾランの混合物を
粒状に形成し、熱を加えて硬化させて粒状物を得
ることは周知である。（The Chemistry of
Cement and Concrete by F.M.Lea 3rd
Edition Chemical Publishing Company.Inc.，
Page 434参照）
石炭火力発電所等から燃焼廃物として大量に排
出されるフライアツシユを使用した粒状物の製造
は、その硬化に長時間を要し、養生硬化時の温度
を高めても硬化時間の短縮は困難であつた。 It is well known to form mixtures of calcium hydroxide, sand and pozzolan into granules and harden them by applying heat to obtain granules. (The Chemistry of
Cement and Concrete by FMLea 3rd
Edition Chemical Publishing Company.Inc.
(See Page 434) Manufacturing granular materials using fly ash, which is produced in large quantities as combustion waste from coal-fired power plants, takes a long time to harden, and even if the temperature during curing is raised, the hardening time cannot be shortened. was difficult.
また、オーストラリア特許73−60298号明細書
には、フライアツシユとポルトランドセメントを
混合して粒状物を得る方法が開示されているが、
その反応は、オートクレーブを使用して圧力が12
Kg／cm2、温度が100℃という条件下で行わなけれ
ばならず、このため、コストがかかるという欠点
があつた。 Furthermore, Australian Patent No. 73-60298 discloses a method for obtaining granules by mixing fly ash and Portland cement.
The reaction is carried out using an autoclave at a pressure of 12
It has to be carried out under conditions of Kg/cm 2 and temperature of 100°C, which has the disadvantage of being costly.
本発明は、比較的低温で、硬化時間が短く、か
つ酸化カルシウムの水和反応をコントロールし、
常圧下での粒状物の製造方法を提供することを目
的とするものである。 The present invention has a relatively low temperature, short curing time, and controls the hydration reaction of calcium oxide.
The object of the present invention is to provide a method for producing granular materials under normal pressure.
この目的は、酸化カルシウムと水とポゾラン反
応性を示す材料であるフライアツシユを混合し、
この混合物を粒状に成形し、この粒状物を実質的
に大気圧の雰囲気でかつ湿潤状態で50℃〜100℃
で熱処理することによつて養生硬化させることに
よつて達成され、特に、95℃で硬化させるのが効
果的である。 The purpose was to mix fly ash, a material that exhibits pozzolanic reactivity with calcium oxide and water.
This mixture is formed into granules, and the granules are heated at 50°C to 100°C in an atmosphere of substantially atmospheric pressure and in a wet state.
This is achieved by curing and curing by heat treatment at 95°C. Particularly effective is curing at 95°C.
ポゾラン反応性物質としてはフライアツシユが
好ましい。フライアツシユは周知のように、火力
発電所の微粉炭を燃焼させた際の副産物で、それ
自体には水硬性がない。セメントに混入使用する
とセメントの水和反応によつて生成する水酸化カ
ルシウムと徐々に反応して不溶性で安定な珪酸カ
ルシウムなどの化合物を生成するポゾラン反応性
を有するため、コンクリートの強度が長期に渡つ
て増加する性質がある。 As the pozzolanic reactive substance, fly ash is preferred. As is well known, fly ash is a byproduct of burning pulverized coal in thermal power plants, and it does not have hydraulic properties in itself. When mixed with cement, it has pozzolanic reactivity, which gradually reacts with calcium hydroxide produced by the hydration reaction of cement to produce insoluble and stable compounds such as calcium silicate, which increases the strength of concrete over a long period of time. It has the property of increasing with time.
粒状に形成された酸化カルシウム、水及びフラ
イアツシユの混合物は、常温、常圧で、すなわ
ち、オートクレーブ等を使用することなく管理さ
れ、次に、従来は、利用されていなかつた物理的
または科学的反応によつて発生した熱を粒状物の
硬化に利用して経済的に粒状物を製造することが
できるようにしたものである。 The mixture of calcium oxide, water and flyash formed into granules is managed at room temperature and pressure, i.e. without using an autoclave, etc., and then subjected to physical or chemical reactions that have not been previously utilized. The heat generated by the process is used to harden the granules, making it possible to economically manufacture the granules.
硬化に利用する熱は、酸化カルシウムを水と混
合する際の水和反応によつて得られ、特に、混合
物中の酸化カルシウムの量は、５％以上、好まし
くは10％以上、さらに好ましくは、少なくとも35
％である。 The heat used for curing is obtained by a hydration reaction when calcium oxide is mixed with water, and in particular, the amount of calcium oxide in the mixture is 5% or more, preferably 10% or more, more preferably, at least 35
%.
酸化カルシウムをこのような量とすることによ
つて、水和熱を粒状物の養生硬化に利用するする
ことができる。したがつて、粒状物は、熱の吸収
体として作用し、酸化カルシウムの爆発的な水和
熱を吸収し、反応を安全なものにしている。 By setting calcium oxide in such an amount, the heat of hydration can be utilized for curing and hardening of the granular material. The granules therefore act as heat absorbers, absorbing the explosive heat of hydration of calcium oxide and making the reaction safe.
水和熱を利用して粒状物を製造する方法とし
て、砂のような酸化珪素を含有する物質と酸化カ
ルシウム、及び水を混合することが知られてい
た。酸化カルシウムと水の反応によつて熱が発生
し、この熱は砂と使用済みの水に吸収されてい
た。しかし、この反応において、酸化カルシウム
の量が10％を超えると、発生した熱が過剰にな
り、水蒸気が爆発的に発生し、混合物が反応槽で
あるオートクレーブから飛びだしてしまうという
欠点があつた。 BACKGROUND ART As a method for producing granular materials using heat of hydration, it has been known to mix a substance containing silicon oxide, such as sand, calcium oxide, and water. The reaction between calcium oxide and water produced heat, which was absorbed by the sand and used water. However, this reaction had the disadvantage that when the amount of calcium oxide exceeded 10%, the heat generated was excessive, causing an explosive generation of steam and causing the mixture to fly out of the reaction vessel, the autoclave.
酸化カルシウムと砂を混合して粒状硬化物を製
造するには、酸化カルシウムが、例えば23％必要
とされるので、水和熱は過剰になり、水和熱によ
る爆発的な水蒸気の発生による混合物の吹き出し
が発生し好ましくなかつた。したがつて、従来の
方法では、なんらかの費用を要する手段を講じな
いと前記のような多量の酸化カルシウムを使用し
た粒状物の製造は不可能であつた。 In order to produce a granular hardened product by mixing calcium oxide and sand, for example, 23% of calcium oxide is required, so the heat of hydration becomes excessive, causing the mixture to explode due to the generation of explosive water vapor due to the heat of hydration. This was undesirable as it caused some bubbles to appear. Therefore, with conventional methods, it has been impossible to produce granules using such a large amount of calcium oxide without taking some expensive measures.
本発明にしたがつて作成された、粒状物は、酸
化カルシウムと水が混合されて発生する熱を吸収
する物質として作用し、爆発的な水蒸気の発生を
抑止することができるので、最終製品である粒状
物は従来に比較し大量のカルシウムを含有するこ
とが可能になつた。 The granules made in accordance with the present invention act as a material that absorbs the heat generated by the mixture of calcium oxide and water, and can inhibit the generation of explosive water vapor, thereby improving the final product. It has become possible for certain granules to contain a larger amount of calcium than before.
熱を吸収した粒状物は、その熱を、放熱領域、
例えば、熱回収槽において流体に熱を与え、この
流体は、加熱媒体として利用することが可能であ
る。粒状物は、かなりの高温になるので、この熱
を高温で回収して、地域暖房に利用することも可
能である。 The granules that absorbed the heat transfer the heat to the heat dissipation area,
For example, heat can be applied to a fluid in a heat recovery tank, and this fluid can be used as a heating medium. Since granular materials reach a fairly high temperature, it is also possible to recover this heat at high temperatures and use it for district heating.
また、アルミニウム、カゼインなどの発泡剤を
添加して粒状物を気泡を含有させることによつ
て、粒状物の密度を調整することができる。 Further, the density of the granular material can be adjusted by adding a foaming agent such as aluminum or casein to make the granular material contain air bubbles.
閉鎖型、または開放型の気泡を有する粒状物の
見掛け密度は、0.3〜1.8Kg／であり、粒状物を
軽量骨材としてセメントコンクリートに使用でき
る。 The apparent density of the granules with closed or open cells is 0.3 to 1.8 Kg/, and the granules can be used as lightweight aggregates in cement concrete.
第１図は、本発明の製造方法に使用する装置
で、第２図は反応槽を示す。 FIG. 1 shows an apparatus used in the production method of the present invention, and FIG. 2 shows a reaction tank.
１は混合槽で、シリカを含有するポゾラン反応
性物質、例えばフアイアツシユ用の入口２、フラ
イアツシユタンク３、水の入口４、水タンク５、
酸化カルシウム用の入口６、酸化カルシウムタン
ク７から構成されている。酸化カルシウムタンク
には、少量のセメントを混入させておいても良
い。 1 is a mixing tank, which includes an inlet 2 for a pozzolanic reactive substance containing silica, such as a fire ash, a fly ash tank 3, a water inlet 4, a water tank 5,
It consists of an inlet 6 for calcium oxide and a calcium oxide tank 7. A small amount of cement may be mixed in the calcium oxide tank.
さらに、熱吸収体９がタンク８から流入口１０
を介して混合槽１に供給される。 Further, the heat absorber 9 is transferred from the tank 8 to the inlet 10.
It is supplied to the mixing tank 1 via.
混合槽１の下部は、テーパ状に形成されてお
り、放出部１１から、粒状の混合物が取り出され
る。 The lower part of the mixing tank 1 is formed in a tapered shape, and the granular mixture is taken out from the discharge part 11.
粒状の混合物は、ふるい装置１２に送られ、不
要な混合物が除去され、この不要物は貯蔵タンク
１３に送られ貯蔵される。一方、粒状の混合物
は、タンク１４に送られ、さらに成形槽１６で砂
供給部１５からの砂と混合され、砂を表面に付着
させた粒状物（カルシウムサンドストーン）が得
られる。 The granular mixture is sent to a sieving device 12 to remove unnecessary mixture, and this waste is sent to a storage tank 13 for storage. On the other hand, the granular mixture is sent to the tank 14 and further mixed with sand from the sand supply section 15 in the forming tank 16 to obtain a granular material (calcium sandstone) with sand attached to its surface.
熱吸収体は、熱回収槽１７において混合槽で吸
収した熱を放出しタンク１３に回収される。 The heat absorber releases the heat absorbed in the mixing tank in the heat recovery tank 17 and recovers it in the tank 13 .
円筒状の反応器を混合物の成形に使用すると、
粒状物は水分をかなり保有しており、形状安定性
が十分でなく、積み重ねられるとその圧力で変形
し、偏平になる恐れがある。この問題を解決した
のが第２図の装置である。 When a cylindrical reactor is used to form the mixture,
The granules retain a considerable amount of water and do not have sufficient shape stability, and when piled up, they may deform due to the pressure and become flat. The device shown in FIG. 2 solves this problem.
第２図は、粒状物の硬化反応器であり、複数の
区画５１，５２，５３を有し、この部分を粒状物
が通過する際に粒状物の養生硬化が行われる。上
の方に存在する粒状物の重量で下方の粒状物の形
状が変形するのを防止するため、区画は、小室
ａ，ｂ，ｃ，ｄ，ｅ，ｆ，ｇ，ｈ，ｉとジグザグ
に形成されており、上方の粒状物の重量が下方の
粒状物にかからないように構成してある。小室ａ
〜ｉ内を通過する際に粒状物には熱が加えられ養
生硬化させられる。この熱は、酸化カルシウムと
水との水和熱でもよく、また、発電所の廃熱であ
つても良い。 FIG. 2 shows a reactor for curing granules, which has a plurality of sections 51, 52, 53, through which curing of the granules is performed. In order to prevent the shape of the lower particulate matter from deforming due to the weight of the upper particulate matter, the compartment is divided into chambers a, b, c, d, e, f, g, h, i in a zigzag pattern. The structure is such that the weight of the upper particulates is not applied to the lower particulates. Small room a
When passing through ~i, heat is applied to the granular material and it is cured and hardened. This heat may be heat of hydration between calcium oxide and water, or may be waste heat from a power plant.
各区画に供給する粒状物を、大中小とふるいで
仕分けし、例えば、区画５１では大粒子、区画５
２では中粒子、区画５３では小粒子を加熱するよ
うにすると、加熱が効率的に行われ硬化が促進さ
れる。粒子の大きさによる選別は、ふるいによつ
て行う。 The granules to be supplied to each section are sorted into large, medium and small particles using a sieve.
By heating the medium particles in section 2 and the small particles in section 53, heating is performed efficiently and curing is promoted. Sorting by particle size is performed using a sieve.
実施例 １
酸化カルシウムと水と石炭火力発電所において
発生したフライアツシユを混合し、酸化カルシウ
ムの水和熱でフライアツシユを活性化した。混合
物を粒状に成形し、この粒状物を湿潤状態で95℃
で少なくとも１時間、好ましくは３時間熱処理
（養生）することによつて硬化させ、粒状物が得
られた。この粒状物は、コンクリートの軽量骨材
として使用できる。Example 1 Calcium oxide, water, and flyash generated in a coal-fired power plant were mixed, and the flyash was activated by the heat of hydration of calcium oxide. Form the mixture into granules and heat the granules in a wet state at 95°C.
Granules were obtained by heat treatment (curing) for at least 1 hour, preferably 3 hours. This granulate can be used as a lightweight aggregate in concrete.
実施例 ２
実施例１において、フライアツシユの一部を
砂、粘度、または、石膏に替え、同様の結果が得
られた。Example 2 Similar results were obtained in Example 1 by replacing part of the fly ash with sand, clay, or gypsum.
実施例 ３
実施例１で得た粒状物を、酸化カルシウム、砂
及び水の混合物で、酸化カルシウムが35％の混合
物に加え、粒状物を形成し、ふるい別けした。こ
の粒状物にさらに砂と混合し、最終的に酸化カル
シウムを５％含有する粒状物が得られた。Example 3 The granules obtained in Example 1 were added to a 35% calcium oxide mixture of calcium oxide, sand and water to form granules and sieved. The granules were further mixed with sand to finally obtain granules containing 5% calcium oxide.
実施例 ４
実施例１において、発泡剤のカゼインを水と混
合しておき、酸化カルシウムおよびフライアツシ
ユと混合して、気泡を有する見掛け密度が0.3〜
1.8Kg／の粒状物が得られた。Example 4 In Example 1, the foaming agent casein was mixed with water, and then mixed with calcium oxide and fly ash to form a foam with an apparent density of 0.3 to 0.3.
1.8Kg/granules were obtained.
実施例 ５
実施例１において、発砲剤のアルミニウム粉末
を混合し、酸化カルシウムと反応させて水素を発
生させ、閉鎖型の気泡を有する見掛け密度が0.3
〜1.8Kg／の粒状物が得られた。見掛け密度の
調整は、添加するアルミニウム粉末の量によつて
加減する。Example 5 In Example 1, aluminum powder as a blowing agent was mixed and reacted with calcium oxide to generate hydrogen, resulting in an apparent density of 0.3 with closed cells.
~1.8Kg/granules were obtained. The apparent density is adjusted by changing the amount of aluminum powder added.
実施例 ６
酸化カルシウム35％と砂を混合し、第１図の混
合槽に供給し、この酸化カルシウムの水和に必要
な水を混合槽内に加え、水酸化カルシウムを得
た。水和熱が多量に発生し、混合槽は100℃以上
になり、粒状物が混合槽から噴出する恐れがある
ので、実施例１で製造した粒状物を熱吸収体とし
て混合槽に加えた。この熱吸収体は、水和熱を吸
収し、混合槽の下部における温度を65℃にまで下
げた。熱吸収体は、分離装置で粒状物と分別され
回収された。Example 6 35% calcium oxide and sand were mixed and supplied to the mixing tank shown in FIG. 1, and water necessary for hydration of the calcium oxide was added to the mixing tank to obtain calcium hydroxide. Since a large amount of heat of hydration was generated and the temperature of the mixing tank reached 100°C or higher, there was a risk that the granules would blow out from the mixing tank, so the granules produced in Example 1 were added to the mixing tank as a heat absorber. This heat absorber absorbed the heat of hydration and lowered the temperature at the bottom of the mixing tank to 65°C. The heat absorber was separated from particulate matter by a separator and recovered.
第１図は本発明の実施に使用する装置である。
第２図は、区画された小室を有する本発明に使用
する反応器である。
１……混合槽、２……ポゾラン反応性物質の入
口、４……水の入口、６……酸化カルシウムの入
口、９……熱吸収体、１２……ふるい装置、１３
……貯蔵タンク。
FIG. 1 shows the apparatus used to practice the invention.
FIG. 2 shows a reactor for use in the present invention having compartmentalized chambers. DESCRIPTION OF SYMBOLS 1... Mixing tank, 2... Pozzolan reactive substance inlet, 4... Water inlet, 6... Calcium oxide inlet, 9... Heat absorber, 12... Sieving device, 13
...storage tank.
Claims (1)
なポゾラン反応性を示す材料を同時に混合し、こ
の混合物を粒状に成形し、この粒状物を実質的に
大気圧の雰囲気でかつ湿潤状態で50℃〜100℃で
熱処理することによつて硬化させることを特徴と
する粒状物の製造方法。 ２ 熱処理の温度が約95℃である特許請求の範囲
第１項記載の粒状物の製造方法。 ３ 熱処理の際の熱源が、燃焼熱である特許請求
の範囲第１項または、２項記載の粒状物の製造方
法。 ４ 熱処理の際の熱源が、酸化カルシウムの水和
熱である特許請求の範囲第１項または、２項記載
の粒状物の製造方法。[Claims] 1. Calcium oxide, water, and a material exhibiting pozzolanic reactivity, such as fly ash, are mixed simultaneously, the mixture is formed into granules, and the granules are processed in an atmosphere of substantially atmospheric pressure and in a wet state. A method for producing a granular material, characterized in that it is hardened by heat treatment at 50°C to 100°C. 2. The method for producing a granular material according to claim 1, wherein the heat treatment temperature is about 95°C. 3. The method for producing a granular material according to claim 1 or 2, wherein the heat source during the heat treatment is combustion heat. 4. The method for producing a granular material according to claim 1 or 2, wherein the heat source during the heat treatment is the heat of hydration of calcium oxide.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8002251A NL182875C (en) | 1980-04-17 | 1980-04-17 | INSTALLATION FOR MANUFACTURING PARTICULATE MATERIAL. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5767067A JPS5767067A (en) | 1982-04-23 |
| JPH0415186B2 true JPH0415186B2 (en) | 1992-03-17 |
Family
ID=19835165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5727881A Granted JPS5767067A (en) | 1980-04-17 | 1981-04-17 | Granulating substance, formation and device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5767067A (en) |
| NL (1) | NL182875C (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS546014A (en) * | 1977-06-16 | 1979-01-17 | Babcock Hitachi Kk | Treatment of fly ash |
| JPS546568A (en) * | 1977-06-17 | 1979-01-18 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber connector |
-
1980
- 1980-04-17 NL NL8002251A patent/NL182875C/en not_active IP Right Cessation
-
1981
- 1981-04-17 JP JP5727881A patent/JPS5767067A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS546014A (en) * | 1977-06-16 | 1979-01-17 | Babcock Hitachi Kk | Treatment of fly ash |
| JPS546568A (en) * | 1977-06-17 | 1979-01-18 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber connector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5767067A (en) | 1982-04-23 |
| NL8002251A (en) | 1981-11-16 |
| NL182875C (en) | 1988-06-01 |
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