JP2020083738A - Accelerating agent - Google Patents
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- JP2020083738A JP2020083738A JP2018225495A JP2018225495A JP2020083738A JP 2020083738 A JP2020083738 A JP 2020083738A JP 2018225495 A JP2018225495 A JP 2018225495A JP 2018225495 A JP2018225495 A JP 2018225495A JP 2020083738 A JP2020083738 A JP 2020083738A
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- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
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- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
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Abstract
Description
本発明は、耐火物の湿式吹き付け施工に用いられる粉末状の急結剤に関する。 The present invention relates to a powdered quick-setting admixture used for wet spraying refractory materials.
耐火物による各種工業窯炉の内張りあるいはその補修の方法として、耐火物（不定形耐火物）を所要量の施工水分をもって予め混練した後、ノズルに圧送し、ノズル又はノズル手前で急結剤を添加して吹き付ける湿式吹き付け施工方法が知られている。
この湿式吹き付け施工方法に用いられる急結剤としては、従来、溶液状の急結剤、特にアルミン酸アルカリ塩の溶液が一般的に用いられていた（例えば、特許文献１参照）。
しかし、アルミン酸アルカリ塩は急結性に優れるが、苛性ソーダを含む高塩基度のために、直接触れると肌が、かぶれや、やけど状態となる。また、一部は吹き付け施工時にノズルからミスト状に浮遊し、これを吸引することで鼻炎を生じる。このように、その使用は作業安全性において問題があった。
As a method for lining or repairing various industrial kilns with refractory materials, kneading the refractory materials (irregular refractory materials) with the required amount of construction water in advance, then pressure-feeding them to the nozzles A wet spraying construction method of adding and spraying is known.
As the quick-setting agent used in this wet spraying method, a solution-type quick-setting agent, in particular, a solution of an alkali aluminate salt has been generally used (see, for example, Patent Document 1).
However, alkaline aluminate salts have excellent quick-setting properties, but due to their high basicity containing caustic soda, the skin may become rashed or burned if directly touched. In addition, some of them float in a mist form from the nozzle during spraying, and sucking this causes rhinitis. Thus, its use has problems with work safety.
このため、アルミン酸アルカリ塩を含まない急結剤の開発が行われている。例えば特許文献２では、水酸化カルシウムに加え、塩化ナトリウム、塩化カリウム、塩化マグネシウム及び炭酸カリウムから選択される少なくとも一種の粉末材料を含む急結剤が提案されている。 Therefore, a quick-setting agent that does not contain alkali aluminate salt is being developed. For example, Patent Document 2 proposes a quick-setting admixture containing, in addition to calcium hydroxide, at least one powder material selected from sodium chloride, potassium chloride, magnesium chloride and potassium carbonate.
しかしながら、アルミン酸アルカリ塩を含まない急結剤を用いた耐火物の湿式吹き付け施工では、アルミン酸アルカリ塩を含む急結剤を用いた耐火物の湿式吹き付け施工に比べて施工の安定性に劣り、ノズルから吹き付けられる耐火物の被施工体への付着性（以下、単に「付着性」という。）が低下する、ノズルが閉塞しやすい、あるいは発塵が生じやすい、といった問題があった。 However, the wet spraying of refractories using a quick-setting agent that does not contain alkali aluminate salt is less stable than the wet-blasting of a refractory that uses a quick-setting agent that contains alkali aluminate salt. However, there are problems that the adhesion of the refractory material sprayed from the nozzle to the work piece (hereinafter simply referred to as "adhesion") is reduced, the nozzle is easily clogged, or dust is easily generated.
本発明が解決しようとする課題は、耐火物の湿式吹き付け施工において、付着性の低下を抑制できるとともにノズル閉塞及び発塵の発生も抑制できる、アルミン酸アルカリ塩を含まない急結剤を提供することにある。 The problem to be solved by the present invention is to provide a quick-setting agent that does not contain an alkali aluminate salt and that can suppress the deterioration of adhesion and can also suppress the occurrence of nozzle clogging and dust generation in wet spraying of refractory materials. Especially.
本発明の一観点によれば、次の急結剤が提供される。
耐火物の湿式吹き付け施工に用いられる粉末状の急結剤であって、
添加剤と、耐火材料とを含み、
前記添加剤は、
水酸化カルシウムと、
アルミナセメント及び珪酸塩から選択される少なくとも一種の硬化促進剤と、
硫酸塩、炭酸塩、クエン酸、クエン酸塩、ホウ酸及びホウ酸塩から選択される少なくとも一種の特定粉末材料と、を含み、
前記水酸化カルシウムの含有量と前記硬化促進剤の含有量との比（前記水酸化カルシウムの含有量／前記硬化促進剤の含有量）が０．７以上４以下であり、
前記水酸化カルシウム及び前記硬化促進剤の合量と前記特定粉末材料の含有量との比（前記水酸化カルシウム及び前記硬化促進剤の合量／前記特定粉末材料の含有量）が１以上１０以下である、急結剤。
According to one aspect of the present invention, the following quick-setting agent is provided.
A powdered quick-setting agent used in the wet spraying of refractories,
Including an additive and a refractory material,
The additive is
Calcium hydroxide,
At least one hardening accelerator selected from alumina cement and silicate,
At least one specific powder material selected from sulfate, carbonate, citric acid, citrate, boric acid and borate, and
The ratio of the content of the calcium hydroxide and the content of the hardening accelerator (content of the calcium hydroxide/content of the hardening accelerator) is 0.7 or more and 4 or less,
The ratio of the total amount of the calcium hydroxide and the hardening accelerator to the content of the specific powder material (the total amount of the calcium hydroxide and the hardening accelerator/the content of the specific powder material) is 1 or more and 10 or less. Is a quick-setting agent.
本発明の急結剤は、「水酸化カルシウム」と、「アルミナセメント及び珪酸塩から選択される少なくとも一種の硬化促進剤」と、「硫酸塩、炭酸塩、クエン酸、クエン酸塩、ホウ酸及びホウ酸塩から選択される少なくとも一種の特定粉末材料」とを特定の含有量比にて含有することから、耐火物の湿式吹き付け施工において、付着性の低下を抑制できるとともにノズル閉塞及び発塵の発生も抑制できる。 The quick-setting agent of the present invention includes "calcium hydroxide", "at least one hardening accelerator selected from alumina cement and silicate", and "sulfate, carbonate, citric acid, citrate, boric acid". And at least one specific powder material selected from borate in a specific content ratio, it is possible to suppress the deterioration of adhesion in the wet spraying of refractory and to prevent nozzle clogging and dust generation. The occurrence of can be suppressed.
本発明の急結剤は、耐火物の湿式吹き付け施工に用いられる粉末状の急結剤であって、添加剤と、耐火材料とを含む。このうち耐火材料としては、アルミナ質、シリカ質、アルミナ−シリカ質、アルミナ−スピネル質、アルミナ−マグネシア質、アルミナ−カーボン質、アルミナ−炭化珪素質、アルミナ−炭化珪素−カーボン質、マグネシア質、マグネシア−カーボン質、カーボン質、炭化珪素質、窒化珪素質、ジルコニア質、カルシア質、ドロマイト質、クロミア質、クロミア−マグネシア質、マグネシア−ライム質、マグネシア−アルミナ質等、各種の粉末状の耐火材料が挙げられ、ノズルに圧送される耐火物（以下「本体材料」という。）に応じて、適宜、一種又は二種以上が選択される。なお、耐火材料は、急結剤１００質量％中に３０質量％以上７０質量％以下の範囲で含有させることが好ましい。 The quick-setting admixture of the present invention is a powder-form quick-setting admixture used for wet spraying a refractory and includes an additive and a refractory material. Among them, as refractory materials, alumina, silica, alumina-silica, alumina-spinel, alumina-magnesia, alumina-carbon, alumina-silicon carbide, alumina-silicon carbide-carbon, magnesia, Magnesia-carbonaceous, carbonaceous, silicon carbide, silicon nitride, zirconia, calcia, dolomite, chromia, chromia-magnesia, magnesia-lime, magnesia-alumina, etc. Materials are listed, and one kind or two or more kinds are appropriately selected according to the refractory material (hereinafter referred to as “main body material”) to be pressure-fed to the nozzle. The refractory material is preferably contained in the range of 30% by mass or more and 70% by mass or less in 100% by mass of the quick-setting agent.
一方、本発明の急結剤において添加剤は、水酸化カルシウムと、アルミナセメント及び珪酸塩から選択される少なくとも一種の硬化促進剤と、硫酸塩、炭酸塩、クエン酸、クエン酸塩、ホウ酸及びホウ酸塩から選択される少なくとも一種の特定粉末材料とを含む。
添加剤に含まれる硬化促進剤のうち珪酸塩としては、珪酸ナトリウム、珪酸カリウム、珪酸リチウム等が挙げられる。
また、添加剤に含まれる特定粉末材料のうち、硫酸塩としては、硫酸カルシウム、硫酸ナトリウム、硫酸カリウム、硫酸マグネシウム、硫酸アルミニウム等が挙げられ、炭酸塩としては、炭酸ナトリウム、炭酸カリウム、炭酸リチウム等が挙げられる。
クエン酸塩としては、クエン酸のアルカリ金属またはアルカリ土類金属塩が好ましく、工業的利用の観点から、クエン酸ナトリウム又はクエン酸カリウムが一般的なものとして挙げられる。
ホウ酸とは、別名ボール酸、正ホウ酸、オルソホウ酸と呼ばれる物で、ピロホウ酸、テトラホウ酸、メタホウ酸を含有するものである。
ホウ酸塩としては、ナトリウム塩、カリウム塩、及びカルシウム塩等が挙げられ、そのうち、ホウ酸ナトリウム又はホウ酸カリウムの使用が好ましく、含水物あるいは無水物のいずれの使用も可能である。
なお、添加剤は、急結剤１００質量％中に３０質量％以上７０質量％以下の範囲で含有させることが好ましい。
On the other hand, the additives in the quick-setting admixture of the present invention include calcium hydroxide, at least one hardening accelerator selected from alumina cement and silicate, sulfate, carbonate, citric acid, citrate, and boric acid. And at least one specific powder material selected from borates.
Among the curing accelerators contained in the additives, examples of the silicate include sodium silicate, potassium silicate, and lithium silicate.
Further, among the specific powder materials contained in the additive, examples of the sulfate include calcium sulfate, sodium sulfate, potassium sulfate, magnesium sulfate, and aluminum sulfate, and examples of the carbonate include sodium carbonate, potassium carbonate, lithium carbonate. Etc.
As the citrate, an alkali metal or alkaline earth metal salt of citric acid is preferable, and sodium citrate or potassium citrate is commonly used from the viewpoint of industrial use.
Boric acid is also known as boric acid, orthoboric acid, orthoboric acid, and contains pyroboric acid, tetraboric acid, and metaboric acid.
Examples of the borate include sodium salt, potassium salt, calcium salt, and the like. Among them, sodium borate or potassium borate is preferably used, and either a hydrate or an anhydride can be used.
The additive is preferably contained in the range of 30% by mass or more and 70% by mass or less in 100% by mass of the quick-setting agent.
本発明において、水酸化カルシウムの含有量と硬化促進剤の含有量との比（水酸化カルシウムの含有量／硬化促進剤の含有量）（以下「第１の含有量比」という。）は、０．７以上４以下とする。すなわち、第１の含有量比が０．７以上４以下の範囲であると、本体材料に対する急結剤の添加量を適正な範囲（本体材料１００質量％に対して外掛けで１．５質量％以上３質量％以下程度）とすることができ、その結果、施工が安定化して付着性の低下を抑制できるとともにノズル閉塞及び発塵の発生も抑制できる。これに対して、第１の含有量比が４超であると、水酸化カルシウムによる凝集性が強くなりノズル閉塞が懸念されるため、急結剤の添加量を減らす必要があり、施工が不安定になる。また、第１の含有量比が０．７未満であると、水酸化カルシウムによる凝集性が弱くなり、急結剤の添加量を増やす必要があり、発塵が生じて作業環境が悪化する。 In the present invention, the ratio of the content of calcium hydroxide and the content of the hardening accelerator (content of calcium hydroxide/content of the hardening accelerator) (hereinafter referred to as “first content ratio”) is It is set to 0.7 or more and 4 or less. That is, when the first content ratio is in the range of 0.7 or more and 4 or less, the amount of the quick-setting agent added to the main body material is within an appropriate range (100 mass% of the main body material, 1.5 mass% by external multiplication). % Or more and about 3% by mass or less), and as a result, it is possible to stabilize the construction and suppress the decrease in adhesion, and also suppress the occurrence of nozzle clogging and dust generation. On the other hand, when the first content ratio is more than 4, cohesiveness due to calcium hydroxide becomes strong and nozzle clogging may occur, so it is necessary to reduce the amount of the quick-setting admixture, which makes the construction difficult. Be stable. Further, if the first content ratio is less than 0.7, the cohesiveness due to calcium hydroxide becomes weak, the amount of the quick-setting agent needs to be increased, and dust is generated to deteriorate the working environment.
また、本発明において、特定粉末材料は以下の機能を有すると推定される。
（１）特定粉末材料中の酸が急結剤中のアルカリイオン（カルシウムイオン）を中和する働きを有し、初期の凝集（水酸化カルシウムによる凝集）を抑制する。
（２）特定粉末材料も凝集作用を有するが、ゆるやかな凝集作用（水酸化カルシウムのように急激な凝集作用ではない）を発揮する。初期は特定粉末材料のゆるやかな凝集作用によりノズル閉塞等を防ぐ機能を発揮する。
Further, in the present invention, the specific powder material is presumed to have the following functions.
(1) The acid in the specific powder material has a function of neutralizing alkali ions (calcium ions) in the quick-setting agent, and suppresses initial aggregation (aggregation by calcium hydroxide).
(2) The specific powder material also has an aggregating action, but exhibits a gentle aggregating action (not a rapid aggregating action like calcium hydroxide). In the initial stage, it exerts the function of preventing nozzle clogging due to the gentle agglomeration action of the specific powder material.
本発明ではこのような特定粉末材料の機能を考慮して、水酸化カルシウム及び硬化促進剤の合量と特定粉末材料の含有量との比（水酸化カルシウム及び硬化促進剤の合量／特定粉末材料の含有量）（以下「第２の含有量比」という。）は、１以上１０以下とする。第２の含有量比が１０超であると、特定粉末材料の含有量に対して水酸化カルシウム及び硬化促進剤の含有量（合量）が多くなるため、特定粉末材料の初期のゆるやかな凝集作用が発揮されず、水酸化カルシウムの急激な凝集作用が支配的となってしまう。また、特定粉末材料中の酸が急結剤中のアルカリイオン（カルシウムイオン）を中和する働きが弱くなり、水酸化カルシウムの初期の凝集を抑制する機能が十分でなくなる。これにより、ノズル閉塞や、施工体が層状になるなどの問題が生じる。
一方、第２の含有量が１未満であると、特定粉末材料の含有量に対して水酸化カルシウム及び硬化促進剤の含有量（合量）が少なくなるため、特定粉末材料の初期のゆるやかな凝集作用が支配的となってしまう。また、特定粉末材料中の酸が急結剤中のアルカリイオン（カルシウムイオン）を中和する機能が過度に発揮されてしまう。これにより、施工直後の強度発現が弱くなって保形性が十分でなくなり、付着性が低下する。
In the present invention, in consideration of such a function of the specific powder material, the ratio of the total amount of calcium hydroxide and the hardening accelerator to the content of the specific powder material (the total amount of calcium hydroxide and the hardening accelerator/specific powder The content of the material) (hereinafter referred to as "second content ratio") is set to 1 or more and 10 or less. If the second content ratio is more than 10, the content (total amount) of calcium hydroxide and the hardening accelerator is large relative to the content of the specific powder material, so that the initial slow agglomeration of the specific powder material. The action is not exerted, and the rapid aggregation action of calcium hydroxide becomes dominant. Moreover, the acid in the specific powder material weakens the action of neutralizing the alkali ions (calcium ions) in the quick-setting agent, and the function of suppressing the initial aggregation of calcium hydroxide becomes insufficient. This causes problems such as nozzle clogging and a layered structure.
On the other hand, when the second content is less than 1, the content (total amount) of calcium hydroxide and the hardening accelerator is smaller than the content of the specific powder material, so that the initial gentleness of the specific powder material is reduced. The aggregation action becomes dominant. Further, the acid in the specific powder material excessively exerts the function of neutralizing the alkali ion (calcium ion) in the quick-setting agent. As a result, the strength development immediately after construction becomes weak, the shape retention becomes insufficient, and the adhesiveness decreases.
なお、本発明において硬化促進剤は珪酸塩、特定粉末材料は硫酸塩であることが好ましく、この場合、第１の含有量比は１以上４以下、第２の含有量比は１．５以上１０以下であることが好ましい。
また、本発明の急結剤は、以上の材料のほかにも、リン酸塩、ポリアクリル酸塩、ポリカルボン酸塩、デキストリン等を適宜含有しうる。
In the present invention, the curing accelerator is preferably a silicate and the specific powder material is a sulfate, and in this case, the first content ratio is 1 or more and 4 or less, and the second content ratio is 1.5 or more. It is preferably 10 or less.
In addition to the above materials, the quick-setting admixture of the present invention may appropriately contain phosphate, polyacrylate, polycarboxylate, dextrin and the like.
表１に示す配合による粉末状の急結剤を用いて不定形耐火物の湿式吹き付け施工を実施し、その施工性を評価した。湿式吹き付け施工では、所定の水分量にて混練したアルミナ−シリカ質の不定形耐火物（本体材料）をダブルピストンポンプにてノズル部まで圧送し、その圧送された本体材料に、別系統でエアー搬送された急結剤をノズル部で混合して、被施工体を模したパネルに対して吹き付けを実施した。 Wet spraying of amorphous refractory was carried out using the powdered quick-setting admixture having the composition shown in Table 1, and the workability was evaluated. In wet spraying, alumina-silica amorphous refractory (main body material) kneaded with a predetermined amount of water is pressure-fed to the nozzle part with a double piston pump, and the pressure-fed main material is aired by another system. The conveyed quick-setting admixture was mixed at the nozzle and sprayed onto a panel imitating a work piece.
施工性としては、以下の要領で（１）付着性、（２）ノズル閉塞性及び（３）発塵性を評価し、これらの評価結果に基づき総合評価を行った。
（１）付着性
「施工対象としたパネルに付着した量／吹き付け時間から推定される吹き付け量」にて算出した付着率で評価し、付着率が９５％以上を◎（良）、９０％以上９５％未満を〇（可）、９０％未満を×（不可）とした。
（２）ノズル閉塞性
「吹き付け終了後のノズル内壁の開口径（付着により減少）／ノズル内径」にて算出したノズル閉塞率で評価し、ノズル閉塞率が１０％以下を◎（良）、１０％超３０％以下を○（可）、３０％超を×（不可）とした。
（３）発塵性
吹き付け施工時における発煙の程度を目視観察することにより評価し、発塵が観察されたが極めて少量であり、作業性に問題ない場合を◎（良）、発塵はあるが、適切な保護部材があれば作業が可能である場合を○（可）、発塵が多く、視界が悪いため適切な保護部材があっても作業が困難である場合を×（不可）とした。
（４）総合評価
各評価の全てが◎の場合を◎（良）、×がなくいずれか一つが○の場合を○（可）、いずれか一つが×の場合を×（不可）とした。
As workability, (1) adhesiveness, (2) nozzle clogging property, and (3) dust generation property were evaluated according to the following procedures, and a comprehensive evaluation was performed based on these evaluation results.
(1) Adhesion Adhesion rate was evaluated by the adhesion rate calculated from "amount adhered to the panel targeted for construction/spraying amount estimated from spraying time". Adhesion rate of 95% or higher is ◎ (good), 90% or higher. Less than 95% was evaluated as ◯ (OK), and less than 90% was evaluated as X (NO).
(2) Nozzle clogging rate Evaluated by the nozzle clogging rate calculated by “opening diameter of nozzle inner wall after spraying (reduced by adhesion)/nozzle inner diameter”, and if the nozzle clogging rate is 10% or less, ◎ (good), 10 More than 30% and less than 30% were evaluated as O (OK), and more than 30% were evaluated as X (NO).
(3) Dust generation Evaluation was made by visually observing the degree of smoke generation during spraying, and dust generation was observed, but when the amount was extremely small and there was no problem in workability, ◎ (good), dust generation However, if the work is possible if there is a suitable protective member, it is ○ (OK), and if there is a lot of dust and the visibility is poor and it is difficult to work even with the appropriate protective member, X (Improper). did.
(4) Comprehensive Evaluation When all of the evaluations are ◎, it is ◎ (good), when there is no ×, one is ○ (good), and when one is ×, it is x (bad).
本発明の範囲内にある実施例１〜１６の急結剤は、総合評価が◎（良）又は○（可）であり、付着性、ノズル閉塞性及び発塵性はいずれも良好であった。 The quick-setting agents of Examples 1 to 16 within the scope of the present invention had a comprehensive evaluation of ⊚ (good) or ∘ (fair), and had good adhesion, nozzle clogging and dust generation. ..
これに対して、比較例１は第１の含有量比（水酸化カルシウムの含有量／硬化促進剤の含有量）が小さい例で、水酸化カルシウムによる凝集性が弱くなって付着性が低下するとともに、急結剤の添加量を増やす必要があり発塵が多く生じた。
比較例２は第１の含有量比が大きい例で、水酸化カルシウムによる凝集性が強くなりすぎてノズル閉塞率が大きくなった。また、ノズル閉塞を抑えるために急結剤の添加量を減らす必要があり、施工が不安定となって付着性が低下した。
On the other hand, Comparative Example 1 is an example in which the first content ratio (calcium hydroxide content/hardening accelerator content) is small, and the cohesiveness due to calcium hydroxide is weakened and the adhesion is reduced. At the same time, it was necessary to increase the amount of the quick-setting agent added, and a lot of dust was generated.
Comparative Example 2 is an example in which the first content ratio is large, in which the cohesiveness due to calcium hydroxide becomes too strong and the nozzle clogging rate becomes large. Further, in order to suppress the nozzle clogging, it was necessary to reduce the amount of the quick-setting agent added, which made the construction unstable and reduced the adhesion.
比較例３は第２の含有量比（水酸化カルシウム及び硬化促進剤の合量／特定粉末材料の含有量）が小さい例で、付着性が低下した。
比較例４は第２の含有量比が大きい例で、ノズル閉塞率が大きくなるとともに施工体が層状になるなどの問題が生じて付着性が低下した。
Comparative Example 3 is an example in which the second content ratio (the total amount of calcium hydroxide and the curing accelerator/the content of the specific powder material) is small, and the adhesiveness is lowered.
Comparative Example 4 is an example in which the second content ratio is large, in which the nozzle clogging rate increases and problems such as a layered construction body occur, and the adhesiveness decreases.
Claims (2)
添加剤と、耐火材料とを含み、
前記添加剤は、
水酸化カルシウムと、
アルミナセメント及び珪酸塩から選択される少なくとも一種の硬化促進剤と、
硫酸塩、炭酸塩、クエン酸、クエン酸塩、ホウ酸及びホウ酸塩から選択される少なくとも一種の特定粉末材料と、を含み、
前記水酸化カルシウムの含有量と前記硬化促進剤の含有量との比（前記水酸化カルシウムの含有量／前記硬化促進剤の含有量）が０．７以上４以下であり、
前記水酸化カルシウム及び前記硬化促進剤の合量と前記特定粉末材料の含有量との比（前記水酸化カルシウム及び前記硬化促進剤の合量／前記特定粉末材料の含有量）が１以上１０以下である、急結剤。 A powdered quick-setting agent used in the wet spraying of refractories,
Including an additive and a refractory material,
The additive is
Calcium hydroxide,
At least one hardening accelerator selected from alumina cement and silicate,
At least one specific powder material selected from sulfate, carbonate, citric acid, citrate, boric acid and borate, and
The ratio of the content of the calcium hydroxide and the content of the hardening accelerator (content of the calcium hydroxide/content of the hardening accelerator) is 0.7 or more and 4 or less,
The ratio of the total amount of the calcium hydroxide and the hardening accelerator to the content of the specific powder material (the total amount of the calcium hydroxide and the hardening accelerator/the content of the specific powder material) is 1 or more and 10 or less. Is a quick-setting agent.
前記特定粉末材料は硫酸塩であり、
前記水酸化カルシウムの含有量と前記珪酸塩の含有量との比（水酸化カルシウムの含有量／前記珪酸塩の含有量）が１以上４以下であり、
前記水酸化カルシウム及び前記珪酸塩の合量と前記硫酸塩の含有量との比（前記水酸化カルシウム及び前記珪酸塩の合量／前記硫酸塩の含有量）が１．５以上１０以下である、請求項１に記載の急結剤。 The curing accelerator is a silicate,
The specific powder material is sulfate,
The ratio of the content of the calcium hydroxide to the content of the silicate (content of calcium hydroxide/content of the silicate) is 1 or more and 4 or less,
The ratio of the total amount of the calcium hydroxide and the silicate to the content of the sulfate (the total amount of the calcium hydroxide and the silicate/the content of the sulfate) is 1.5 or more and 10 or less. The rapid-setting agent according to claim 1.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002241159A (en) * | 2001-02-09 | 2002-08-28 | Mitsubishi Materials Corp | Accelerator for spraying and spraying material using the same |
| WO2005019131A1 (en) * | 2003-08-20 | 2005-03-03 | Denki Kagaku Kogyo Kabushiki Kaisha | Spraying material and spray technique employing the same |
| JP2010235383A (en) * | 2009-03-31 | 2010-10-21 | Sumitomo Osaka Cement Co Ltd | Method for producing modified granulated blast furnace slag and method for producing blast furnace cement |
| JP2010536705A (en) * | 2007-08-17 | 2010-12-02 | スペシャルティ ミネラルズ （ミシガン） インコーポレーテツド | Heat-resistant substance mixed with calcium by adding calcium carbonate |
| JP2017095322A (en) * | 2015-11-26 | 2017-06-01 | 黒崎播磨株式会社 | Powder quick setting agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002241159A (en) * | 2001-02-09 | 2002-08-28 | Mitsubishi Materials Corp | Accelerator for spraying and spraying material using the same |
| WO2005019131A1 (en) * | 2003-08-20 | 2005-03-03 | Denki Kagaku Kogyo Kabushiki Kaisha | Spraying material and spray technique employing the same |
| JP2010536705A (en) * | 2007-08-17 | 2010-12-02 | スペシャルティ ミネラルズ （ミシガン） インコーポレーテツド | Heat-resistant substance mixed with calcium by adding calcium carbonate |
| JP2010235383A (en) * | 2009-03-31 | 2010-10-21 | Sumitomo Osaka Cement Co Ltd | Method for producing modified granulated blast furnace slag and method for producing blast furnace cement |
| JP2017095322A (en) * | 2015-11-26 | 2017-06-01 | 黒崎播磨株式会社 | Powder quick setting agent |
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