JPH09227242A - Refractory for spraying - Google Patents
Refractory for sprayingInfo
- Publication number
- JPH09227242A JPH09227242A JP8056742A JP5674296A JPH09227242A JP H09227242 A JPH09227242 A JP H09227242A JP 8056742 A JP8056742 A JP 8056742A JP 5674296 A JP5674296 A JP 5674296A JP H09227242 A JPH09227242 A JP H09227242A
- Authority
- JP
- Japan
- Prior art keywords
- fine powder
- surfactant
- refractory
- spraying
- glycol
- 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
Landscapes
- Ceramic Products (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、工業窯炉の内張り耐火
壁を構成する吹付施工用耐火物に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory for spraying construction which constitutes an inner refractory wall of an industrial kiln.
【0002】[0002]
【従来の技術】従来より施工枠が不要であり、作業能率
が高い等の利点より吹付施工が広く採用されている。こ
れに利用する吹付施工用耐火物(以下吹付材と言う)に
は、発塵が少なくかつリバウンドロスが少なく(付着率
が高く)ダレ(流下)現像がない等の性能が要求される。2. Description of the Related Art Conventionally, a spray frame has been widely adopted because of its advantages such as a high work efficiency and a high work efficiency. The refractory for spraying used for this purpose (hereinafter referred to as spraying material) is required to have performance such as low dust generation, low rebound loss (high adhesion rate) and no sag (downflow) development.
【0003】そこで付着性向上のために従来から結合剤
およびその硬化剤に関する種々の提案がなされている。
また超微粉の使用や分散剤,凝集剤を添加する方法によ
り粘性等の制御を行なうことが実施されている。さらに
その効果を高めるために吹付材と添加水の混合や反応を
すばやくさせる方法としてノズル形状の改良や温水使用
による結合剤等の溶解促進,結合剤や界面活性剤の水溶
液を添加する方法などが提案されている。Therefore, in order to improve the adhesiveness, various proposals have been made for a binder and a curing agent therefor.
In addition, the viscosity and the like are controlled by using ultrafine powder and adding a dispersant and a coagulant. In order to further enhance the effect, as a method of mixing the spraying material and the added water and making the reaction quick, there are methods such as improving the nozzle shape, accelerating the dissolution of the binder by using hot water, and adding an aqueous solution of the binder and the surfactant. Proposed.
【0004】[0004]
【発明が解決しようとする課題】しかし、上記の従来方
法では十分な付着性が得られていない。これはノズル内
で吹付材と添加水の混合が不十分なためである。特に超
微粉が多い場合や粘性が高い場合は、ノズル内で微粉の
一部が添加水を吸収し、微粉部と粗粒部に分離し、また
吹付材に炭素,黒鉛など水に濡れにくい耐火材が含まれ
ている場合は添加水と十分になじまないままノズルから
吐出されて発塵が多くなり、良好な付着性が得られな
い。However, sufficient adhesion cannot be obtained by the above-mentioned conventional methods. This is because the spray material and the added water are not sufficiently mixed in the nozzle. Especially when there is a large amount of ultrafine powder or viscosity is high, part of the fine powder absorbs the added water in the nozzle and separates into fine and coarse particles, and the spray material is carbon, graphite, etc. When the material is included, it is ejected from the nozzle without being sufficiently mixed with the added water and dust is increased, so that good adhesion cannot be obtained.
【0005】[0005]
【課題を解決するための手段】本発明は、上記の問題点
を解決し、吹付材と添加水をノズル内で十分に混合させ
ることにより均一な吹付材の吐出を確保し、高い付着性
を得ることを目的とするものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and ensures a uniform discharge of the spray material by mixing the spray material and the additive water sufficiently in the nozzle, thus ensuring high adhesion. The purpose is to obtain.
【0006】すなわち耐火原料100重量%に対し、多
価アルコール 0.1〜3.0重量%と界面活性剤 0.01〜0.1
重量%を別々または混合した液体を粒子径 50μ以下の
微粉部と予備混練した後、残りの耐火骨材および結合剤
を混合した良好な付着性と耐食性を有する吹付施工用耐
火物を提供することにある。That is, with respect to 100% by weight of the refractory raw material, 0.1 to 3.0% by weight of polyhydric alcohol and 0.01 to 0.1% of surfactant.
To provide a refractory for spraying with good adhesion and corrosion resistance, which is obtained by pre-kneading a liquid containing 50% or less by weight of fine powder with a particle size of 50μ or less and then mixing the remaining refractory aggregate and binder. It is in.
【0007】[0007]
【作用】微粉部に液状の界面活性剤を添加することによ
り、微粉と添加水との濡れ性を大幅に改善できる。特に
従来吹付材には使用しにくいものであった黒鉛系微粉に
ついてもその表面が液状の界面活性剤でコーティングさ
れるため大幅に添加水が増加することなく吹付け施工が
可能となる。By adding a liquid surfactant to the fine powder portion, the wettability between the fine powder and the added water can be greatly improved. In particular, graphite-based fine powder, which has been difficult to use in conventional spraying materials, is coated with a liquid surfactant on the surface, so that spraying can be performed without significantly increasing the amount of added water.
【0008】少量の界面活性剤を微粉と均一に混合する
ため多価アルコールと界面活性剤を混合した液体を添加
しても良い。この液体は湿潤剤として作用し短時間で粉
体と水の混合湿潤を促進し、吹付材が微粉部と粗粒部に
分離することを防止する。A liquid in which a polyhydric alcohol and a surfactant are mixed may be added in order to uniformly mix a small amount of the surfactant with the fine powder. This liquid acts as a wetting agent, promotes the mixing and wetting of the powder and water in a short time, and prevents the spray material from separating into a fine powder portion and a coarse particle portion.
【0009】本発明に使用する微粉は特に限定するもの
ではなくシリカ,アルミナ,マグネシア,炭化珪素,窒
化珪素,炭素,黒鉛,粘土,金属粉等が挙げられる。微
粉の粒径は 50μ以下のものが好ましい。なお上述の微
粉は1種または2種以上を併用して使用することができ
る。The fine powder used in the present invention is not particularly limited, and examples thereof include silica, alumina, magnesia, silicon carbide, silicon nitride, carbon, graphite, clay and metal powder. The fine powder preferably has a particle size of 50 μm or less. The above fine powders can be used alone or in combination of two or more.
【0010】多価アルコールとしてはグリセリン,エチ
レングリコール,ジエチレングリコール,プロピレング
リコール,ポリエチレングリコール等が挙げられ、結合
剤等と反応しないものが好ましい。上述の多価アルコー
ルは1種または2種以上を併用して使用することがで
き、耐火骨材100重量%に対し 0.1〜3.0重量%が添
加される。添加量が 0.1重量%未満であると微粉と均一
に混合することが困難であるため好ましくなく 3.0重量
%を超えると施工体の流動性が強くなりダレ(流下)現像
が起こるため好ましくない。Examples of the polyhydric alcohol include glycerin, ethylene glycol, diethylene glycol, propylene glycol and polyethylene glycol, and those which do not react with a binder or the like are preferable. The above-mentioned polyhydric alcohols can be used alone or in combination of two or more, and 0.1 to 3.0% by weight is added to 100% by weight of the refractory aggregate. If the addition amount is less than 0.1% by weight, it is difficult to uniformly mix it with the fine powder, and if it exceeds 3.0% by weight, the fluidity of the construction product becomes strong and sagging (downflow) development occurs, which is not preferable.
【0011】界面活性剤は骨材や微粉の濡れ性を改善す
るものであれば特に限定するものではないが、液状のも
のが好ましく、耐火骨材100重量%に対し 0.01〜0.1
重量%の範囲で添加される。添加量が 0.01重量%未満
であると濡れ性の改善効果が十分でなく、0.1重量%を
超えると発泡しやすくなり、吹付材の充填が阻害される
ので好ましくない。The surfactant is not particularly limited as long as it improves the wettability of aggregates and fine powders, but liquid ones are preferable, and 0.01 to 0.1 per 100% by weight of refractory aggregate.
It is added in the range of weight%. If the addition amount is less than 0.01% by weight, the effect of improving the wettability is not sufficient, and if it exceeds 0.1% by weight, foaming tends to occur and filling of the spraying material is hindered, which is not preferable.
【0012】なお、配合残部の耐火骨材については特に
規制はないが、耐火骨材として酸性,中性,塩基性,あ
るいは天然,人工の公知の材料を単独または2種類以上
組み合わせて使用する。その粒度は従来の吹付材と特に
変わりなく粗粒,中粒,微粒に調整する。結合剤として
はアルカリ金属リン酸塩,アルカリ土類金属リン酸塩,
アルカリ金属ケイ酸塩あるいはアルミナセメント等を単
独または併用して使用することができ、それらの硬化剤
等の使用も可能である。There are no particular restrictions on the refractory aggregate as the balance of the compound, but as the refractory aggregate, known acidic, neutral, basic, natural or artificial materials may be used alone or in combination of two or more. The particle size is the same as that of conventional sprayed materials, and is adjusted to coarse particles, medium particles, and fine particles. As the binder, alkali metal phosphate, alkaline earth metal phosphate,
Alkali metal silicates or alumina cements can be used alone or in combination, and their curing agents can also be used.
【0013】この他従来の吹付材に添加されているピッ
チ,吸水性ポリマー,有機繊維,無機繊維,金属繊維な
どを添加してもよい。In addition, pitch, water-absorbing polymer, organic fiber, inorganic fiber, metal fiber, etc., which have been added to conventional spraying materials, may be added.
【0014】[0014]
【実施例】第1表に本発明実施例とその比較例を示す。
各例は第1表に示す配合組成からなり、吹付けはノズル
で水を混合させるいわゆる乾式法で行ない、れんが積み
した垂直壁に 150mm の施工厚で吹付けた。EXAMPLES Table 1 shows examples of the present invention and comparative examples thereof.
Each example had the composition shown in Table 1, spraying was carried out by a so-called dry method in which water was mixed with a nozzle, and sprayed on a vertical wall of bricks with a construction thickness of 150 mm.
【0015】上述の第1表から明らかなように本発明に
よる吹付材は吹付材と添加水が均一に混合されるため、
発塵が極めて少なく付着率が高くまた施工体の品質が向
上する。As is clear from Table 1 above, in the spray material according to the present invention, since the spray material and the added water are uniformly mixed,
Very little dust is generated and the adhesion rate is high, and the quality of the construction body is improved.
【0016】[0016]
【発明の効果】本発明により以下の効果が得られる。The following effects can be obtained by the present invention.
【0017】(1) 吹付材と添加水がノズル内で均一に混
合されるため施工性の改善効果が大きい。(1) Since the spray material and the added water are uniformly mixed in the nozzle, the effect of improving the workability is great.
【0018】(2) 吹付材と添加水がノズル内で均一に混
合されるため施工体の組織が均一となる。(2) Since the spray material and the added water are uniformly mixed in the nozzle, the structure of the construction body becomes uniform.
【0019】(3) 水との濡れ性が悪い原料を使用しても
添加水が大幅に増加することなく吹付けできるため、緻
密な組織が得られる。(3) Even if a raw material having poor wettability with water is used, the added water can be sprayed without significantly increasing, so that a dense structure can be obtained.
【表1】 [Table 1]
Claims (1)
コール 0.1〜3.0重量%界面活性剤 0.01〜0.1重量%を
別々または混合した液体を粒子径 50μ以下の微粉を主
とする耐火物原料と予備混練した後、残りの耐火骨材お
よび結合剤を混合したことを特徴とする吹付施工用耐火
物。1. A liquid in which polyhydric alcohol 0.1-3.0 wt% surfactant 0.01-0.1 wt% is separately or mixed with 100 wt% of refractory raw material is used as a refractory raw material mainly composed of fine powder having a particle size of 50 μm or less. A refractory for spraying construction, characterized by mixing the remaining refractory aggregate and binder after pre-kneading.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8056742A JPH09227242A (en) | 1996-02-19 | 1996-02-19 | Refractory for spraying |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8056742A JPH09227242A (en) | 1996-02-19 | 1996-02-19 | Refractory for spraying |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09227242A true JPH09227242A (en) | 1997-09-02 |
Family
ID=13035992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8056742A Pending JPH09227242A (en) | 1996-02-19 | 1996-02-19 | Refractory for spraying |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH09227242A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100415762B1 (en) * | 1998-07-16 | 2004-03-30 | 주식회사 포스코 | Manufacturing method of waste refractory castable with improved fluidity |
WO2017204847A1 (en) * | 2016-05-24 | 2017-11-30 | Specialty Minerals (Michigan) Inc. | Liquid flow aid for dry gunnables |
-
1996
- 1996-02-19 JP JP8056742A patent/JPH09227242A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100415762B1 (en) * | 1998-07-16 | 2004-03-30 | 주식회사 포스코 | Manufacturing method of waste refractory castable with improved fluidity |
WO2017204847A1 (en) * | 2016-05-24 | 2017-11-30 | Specialty Minerals (Michigan) Inc. | Liquid flow aid for dry gunnables |
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