JPH0764652B2 - Sprayed refractory - Google Patents
Sprayed refractoryInfo
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- JPH0764652B2 JPH0764652B2 JP61110131A JP11013186A JPH0764652B2 JP H0764652 B2 JPH0764652 B2 JP H0764652B2 JP 61110131 A JP61110131 A JP 61110131A JP 11013186 A JP11013186 A JP 11013186A JP H0764652 B2 JPH0764652 B2 JP H0764652B2
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Description
【発明の詳細な説明】 産業上の利用分野 本発明は吹付耐火物に関し、より詳しくは、各種炉壁面
への付着性がよく、接着強度が高く、耐用性に優れた冷
間吹付補修用吹付耐火物に関する。Description: TECHNICAL FIELD The present invention relates to a spray refractory, and more particularly to a cold spray repair spray that has good adhesion to various furnace wall surfaces, high adhesive strength, and excellent durability. Regarding refractories.
従来技術 近年熱間あるいは冷間での吹付補修が広く行われ、各種
炉寿命の延長に大きく貢献している。2. Description of the Related Art In recent years, hot and cold spray repairs have been widely performed, and have greatly contributed to extending the life of various furnaces.
冷間での吹付補修材としては、アルミナセメントを結合
剤とした耐火物が主に使用されている。しかしながら、
この耐火物は、壁面との接着強度が低く、耐用性に乏し
い。またリン酸塩、珪酸ソーダ等を結合剤とした耐火物
も使用されているが、作業性が良くない。A refractory containing alumina cement as a binder is mainly used as a cold spray repair material. However,
This refractory has low adhesion strength to the wall surface and poor durability. Refractory materials containing phosphate, sodium silicate, etc. as a binder are also used, but their workability is not good.
発明が解決しようとする問題点 本発明者は、アミンシリケートを含有する耐火物が優れ
た接着強度を有することに着目し、すでに本発明者が開
発したアミンシリケート含有キヤスタブル耐火物（特開
昭61−10076号）を、冷間吹付材として使用すべき検討
を重ねてきた。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present inventor has noticed that a refractory containing an amine silicate has excellent adhesive strength, and has already developed a castable refractory containing an amine silicate (JP-A-61 No. -10076) has been repeatedly investigated as a cold spray material.
アミンシリケートは解膠性にも優れているため、流動性
がよい。そのため、上記キヤスタブル耐火物を吹付材と
して使用した場合、該耐火物は、その接着強度を発揮す
る前に炉壁面から流れ落ちてしまう。アミンシリケート
と消石灰、生石灰等の無機カルシウム塩とを組み合せて
使用すると、吹付時の流れ落ちを防止でき、付着性が向
上する。しかしながら、無機カルシウム塩は急速にアミ
ンシリケートと反応するため、アミンシリケートの硬化
が早まつてその接着強度が十分発現せず、作業上の取り
扱いが非常に困難であつた。Amine silicate has excellent peptizing property, and therefore has good fluidity. Therefore, when the castable refractory material is used as a spray material, the refractory material flows down from the furnace wall surface before exhibiting its adhesive strength. When an amine silicate is used in combination with an inorganic calcium salt such as slaked lime or quick lime, runoff during spraying can be prevented and adhesion is improved. However, since the inorganic calcium salt rapidly reacts with the amine silicate, the curing of the amine silicate is accelerated so that the adhesive strength of the amine silicate is not sufficiently developed, which makes the handling extremely difficult.
問題点を解決するための手段 本発明者は、上記問題点に鑑み、鋭意研究を重ねた結
果、特開昭61−10076号に記載のキヤスタブル耐火物に
無機カルシウム化合物と有機カルシウム塩とを添加する
ことによつて、炉壁面との付着性がよく、接着強度が高
く、耐用性に優れた冷間吹付補修用耐火物が得られるこ
とを見出し、本発明を完成した。Means for Solving Problems The present inventors have conducted intensive studies in view of the above problems, and as a result, added an inorganic calcium compound and an organic calcium salt to a castable refractory described in JP-A-61-10076. By doing so, it was found that a refractory for cold spray repair having good adhesion to the furnace wall surface, high adhesive strength, and excellent durability was obtained, and the present invention was completed.
即ち本発明は、アルミナセメント１〜10重量％を含有す
る耐火物配合物100重量部、アミンシリケート0.3〜２重
量部、無機カルシウム化合物0.03〜２重量部及び有機カ
ルシウム塩0.03〜２重量部からなることを特徴とする吹
付耐火物、並びにアルミナセメント１〜10重量％及びシ
リカフラワー0.5〜８重量％を含有する耐火物配合物100
重量部、アミンシリケート0.3〜２重量部、無機カルシ
ウム化合物0.03〜２重量部及び有機カルシウム塩0.03〜
２重量部とからなることを特徴とする吹付耐火物に係る
ものである。That is, the present invention comprises 100 parts by weight of a refractory compound containing 1 to 10% by weight of alumina cement, 0.3 to 2 parts by weight of an amine silicate, 0.03 to 2 parts by weight of an inorganic calcium compound and 0.03 to 2 parts by weight of an organic calcium salt. And a refractory compound containing 1 to 10% by weight of alumina cement and 0.5 to 8% by weight of silica flour.
Parts by weight, amine silicate 0.3 to 2 parts by weight, inorganic calcium compound 0.03 to 2 parts by weight and organic calcium salt 0.03 to
It relates to a sprayed refractory material, which is characterized by comprising 2 parts by weight.
本発明に於て耐火物配合物とは、耐火骨材、結合粘土及
びアルミナセメント、或いは前記３種の材料とシリカフ
ラワーとからなるものである。耐火骨材としては、通常
の吹付材に使用する耐火骨材から目的に応じて適宜選択
でき、例えばアルミナ、ムライト、ボーキサイト、シヤ
モツト、ろう石、珪石、ジルコン、ジルコニア、炭化珪
素、黒鉛などが挙げられ、その他マグネシア、クロム鉄
鉱などの塩基性材料も使用できる。また結合粘土として
は木節粘土、カオリン粘土、ベントナイト等を例示でき
る。耐火骨材及び結合粘土の使用量は特に制限されず、
適宜選択すればよい。In the present invention, the refractory compound is a refractory aggregate, bonded clay and alumina cement, or a mixture of the above three materials and silica flour. The refractory aggregate can be appropriately selected from the refractory aggregates used for ordinary spraying materials according to the purpose, and examples thereof include alumina, mullite, bauxite, chamotte, pyrophyllite, silica stone, zircon, zirconia, silicon carbide and graphite. In addition, basic materials such as magnesia and chromite can also be used. Examples of the bound clay include Kibushi clay, kaolin clay and bentonite. The amount of refractory aggregate and bonded clay used is not particularly limited,
It may be selected appropriately.
本発明で使用するアルミナセメントとしては、特に制限
はなく、通常市販されているスーパークラス（Al2O380
％,CaO18％），ハイアルミナクラス（Al2O373％,CaO25
％）,1号,2号セメント（Al2O363〜52％,CaO35〜45％）
などが使用できる。アルミナセメントの使用量は、耐火
物配合物中１〜10重量％程度とするのがよい。１重量％
未満では得られる耐火物の強度が十分ではなく、一方10
重量％を越えると耐火性が低下し、急熱した場合には耐
火物の表面が剥離する可能性がある。The alumina cement used in the present invention is not particularly limited, and is usually commercially available super class (Al 2 O 3 80
%, CaO18%), high alumina class (Al 2 O 3 73%, CaO25
%), No. 1 and No. 2 cement (Al 2 O 3 63 to 52%, CaO 35 to 45%)
Etc. can be used. The amount of alumina cement used is preferably about 1 to 10% by weight in the refractory mixture. 1% by weight
If less than 10, the strength of the refractory obtained is not sufficient, while 10
If it exceeds 5% by weight, the fire resistance is deteriorated, and the surface of the refractory material may be peeled off when heated rapidly.
本発明ではシリカフラワーを添加することにより、耐火
物の強度及び吹付時の作業性が一層改善される。シリカ
フラワーの使用量は、通常耐火物配合物中0.5〜８重量
％程度、好ましくは１〜７重量％程度とするのがよい。
0.5重量％未満では、シリカ−フラワーを添加した効果
が発現しない。一方８重量％を越えると、耐火性が低下
し、収縮が増大し、好ましくない。In the present invention, the addition of silica flour further improves the strength of the refractory and the workability during spraying. The amount of silica flour used is usually about 0.5 to 8% by weight, preferably about 1 to 7% by weight in the refractory composition.
If it is less than 0.5% by weight, the effect of adding silica-flower will not be exhibited. On the other hand, if it exceeds 8% by weight, the fire resistance decreases and the shrinkage increases, which is not preferable.
本発明で使用するアミンシリケートとは、コロイドケイ
酸Na2O・3SiO2・3H2OのNaを、中性のアルキル基を有す
るアミンNH2CnH2n−で置換したものである。このアミン
シリケートはpH変動に対して安定なため、アルミナセメ
ントとともに混練しても急速に硬化することはない。本
発明では、コロイドケイ酸とアミンとを反応させて得ら
れる約35〜40％アミンシリケート水溶液（アミンシリケ
ート原液）を使用する。アミンシリケート原液は高粘性
のため、通常は水で希釈し、この希釈液を耐火物配合物
とともに使用するのが好ましい。アミンシリケート原液
と水との混合割合には特に制限がなく、適宜選択可能で
ある。本発明ではアミンシリケートの使用量が、耐火物
配合物100重量部に対して0.3〜２重量部程度となるよう
にアミンシリケート原液を使用すればよい。アミンシリ
ケートの使用量が0.3重量部未満では、十分な強度が得
られず、接着強度も低い。２重量部を越えると硬化が遅
くなり、また収縮が大きくなるため、耐火物としては不
適当である。The amine silicate used in the present invention is obtained by substituting Na of colloidal silicate Na 2 O.3SiO 2 .3H 2 O with amine NH 2 CnH 2n- having a neutral alkyl group. Since this amine silicate is stable against pH fluctuation, it does not harden rapidly when kneaded with alumina cement. In the present invention, an approximately 35 to 40% aqueous amine silicate solution (amine silicate stock solution) obtained by reacting colloidal silicic acid and an amine is used. Because the amine silicate stock solution is highly viscous, it is usually preferred to dilute it with water and use this diluent with the refractory formulation. The mixing ratio of the amine silicate stock solution and water is not particularly limited and can be appropriately selected. In the present invention, the amine silicate stock solution may be used so that the amount of the amine silicate used is about 0.3 to 2 parts by weight based on 100 parts by weight of the refractory compound. If the amount of amine silicate used is less than 0.3 parts by weight, sufficient strength cannot be obtained and the adhesive strength is low. If it exceeds 2 parts by weight, curing will be slow and shrinkage will be large, so that it is unsuitable as a refractory material.
本発明では、アミンシリケートとともに無機カルシウム
化合物と有機カルシウム塩とを使用することにより、得
られる吹付耐火物の各種炉壁面への付着性及び接着強度
を高めることができる。即ち、無機カルシウム化合物
は、アミンシリケートに起因する吹付物の流れ落ちを防
止する。また有機カルシウム塩は、無機カルシウム化合
物によつて引き起されるアミンシリケートの急速な硬化
を抑制する。In the present invention, by using the inorganic calcium compound and the organic calcium salt together with the amine silicate, it is possible to enhance the adhesiveness and the adhesive strength of the obtained sprayed refractory to various furnace wall surfaces. That is, the inorganic calcium compound prevents the sprayed material from flowing off due to the amine silicate. The organic calcium salt also suppresses the rapid hardening of the amine silicate caused by the inorganic calcium compound.
無機カルシウム化合物としては、消石灰、生石灰などが
使用でき、またポルトランドセメント、軽焼ドロマイト
なども使用可能である。無機カルシウム化合物の使用量
は、耐火物配合物100重量部に対し、通常0.03〜２重量
部程度、好ましくは0.05〜１重量部程度とするのがよ
い。0.03重量部未満では、吹付耐火物の流れ落ちを抑制
できない。一方２重量部を越えると、有機カルシウム塩
を所定量加えてもアミンシリケートが急速に硬化して均
一な吹付物が得られず、吹付物の接着強度並びに強度も
十分発現しない。As the inorganic calcium compound, slaked lime, quick lime and the like can be used, and Portland cement, light burned dolomite and the like can also be used. The amount of the inorganic calcium compound used is usually about 0.03 to 2 parts by weight, preferably about 0.05 to 1 part by weight, based on 100 parts by weight of the refractory mixture. If it is less than 0.03 part by weight, the flow-down of the sprayed refractory cannot be suppressed. On the other hand, when the amount exceeds 2 parts by weight, the amine silicate is rapidly hardened even if a predetermined amount of organic calcium salt is added, a uniform sprayed product cannot be obtained, and the adhesive strength and strength of the sprayed product are not sufficiently expressed.
有機カルシウム塩としては、酢酸カルシウム、プロピオ
ン酸カルシウム、シユウ酸カルシウムなどが使用でき
る。有機カルシウム塩の使用量は、耐火物配合物100重
量部に対し、通常0.03〜２重量部程度、好ましくは0.05
〜１重量部程度とするのがよい。0.03重量部未満では、
無機カルシウム化合物によつて引き起されるアミンシリ
ケートの急速な硬化を抑制できず、一方２重量部を越え
ると硬化速度が著しく遅くなり好ましくない。As the organic calcium salt, calcium acetate, calcium propionate, calcium oxalate and the like can be used. The amount of the organic calcium salt used is usually about 0.03 to 2 parts by weight, preferably 0.05, based on 100 parts by weight of the refractory mixture.
It is preferable that the amount is about 1 part by weight. Below 0.03 parts by weight,
The rapid curing of the amine silicate caused by the inorganic calcium compound cannot be suppressed, while if it exceeds 2 parts by weight, the curing rate becomes extremely slow, which is not preferable.
本発明吹付耐火物は、吹付施工に先立ち前記した耐火物
配合物、無機カルシウム化合物及び有機カルシウム塩か
らなる混合物とアミンシリケート希釈液とを混練して使
用すればよい。The sprayed refractory of the present invention may be used by kneading a mixture of the above-mentioned refractory mixture, an inorganic calcium compound and an organic calcium salt, and an amine silicate diluent prior to spraying.
本発明吹付耐火物を使用して、吹付補修を行うには、例
えば以下の如くすればよい。即ち、耐火物配合物、無機
カルシウム化合物及び有機カルシウム塩を混合し、得ら
れた混合物に、吹付施工時に吹付用ノズルの先端のウオ
ーターリング部分からアミンシリケート希釈液を添加
し、吹付ければよい。また、上記混合物に３〜４％程度
の水を加えて均一に混合し、上記と同様にして吹付けれ
ば、粉塵の発生が非常に少なく、例えば混銑車の吹付補
修のような閉塞された雰囲気中における吹付補修も可能
である。To perform spray repair using the spray refractory of the present invention, for example, the following may be performed. That is, a refractory mixture, an inorganic calcium compound and an organic calcium salt may be mixed, and an amine silicate diluent may be added to the resulting mixture from the water ring portion at the tip of the spray nozzle during spraying and spraying. Further, if 3 to 4% of water is added to the above mixture and uniformly mixed and sprayed in the same manner as above, the generation of dust is very small, for example, in a closed atmosphere such as spray repair of a tow truck. Spray repairs inside are also possible.
発明の効果 本発明吹付耐火物は、各種炉壁面への付着性がよく、高
い接着強度を示し、耐用性に優れた吹付材である。更に
本発明吹付耐火物は適度な硬化時間を有し、作業上の取
り扱いが容易であり、特に混銑車、溶銑鍋、要鋼鍋、タ
ンデイツシユなどの冷間吹付補修用材として有用であ
る。EFFECTS OF THE INVENTION The sprayed refractory of the present invention is a sprayed material that has good adhesion to various furnace wall surfaces, high adhesive strength, and excellent durability. Furthermore, the sprayed refractory material of the present invention has an appropriate curing time and is easy to handle during work, and is particularly useful as a cold spraying repair material for a hot metal wheel, a hot metal ladle, a steel pot, a tandishyu and the like.
実 施 例 次に実施例及び比較例を挙げて本発明を更に詳しく説明
する。EXAMPLES Next, the present invention will be described in more detail with reference to Examples and Comparative Examples.
実施例１〜３ 第１表に示す配合割合（重量％）で耐火物配合物を製造
した。得られた耐火物配合物100重量部に対し、第１表
に示す配合割合（重量部）で消石灰、酢酸カルシウム及
びアミンシリケート希釈液を添加してよく混練し、本発
明吹付耐火物を製造した。得られた本発明吹付耐火物
を、以下の（１）〜（３）の如く加熱処理した後、それ
ぞれの場合についてその線膨脹収縮をJIS−Ｒ−2554に
準じて、また圧縮強さ、曲げ強さ及び接着強さをJIS−
Ｒ−2553に準じて測定した。結果を第２表に示す。Examples 1 to 3 Refractory compounds were produced at the compounding ratios (% by weight) shown in Table 1. To 100 parts by weight of the obtained refractory compound, slaked lime, calcium acetate and amine silicate diluent were added at a compounding ratio (parts by weight) shown in Table 1 and well kneaded to produce a sprayed refractory of the present invention. . The obtained blown refractory material of the present invention was subjected to heat treatment as described in (1) to (3) below, and in each case, its linear expansion and contraction was in accordance with JIS-R-2554, and the compression strength and bending were JIS-based strength and adhesive strength
It was measured according to R-2553. The results are shown in Table 2.
（１） 本発明吹付耐火物を40×40×160mmの金型に流
し込み、室温で１日養生後、110℃で20時間乾燥した。(1) The sprayed refractory material of the present invention was poured into a mold of 40 × 40 × 160 mm, cured at room temperature for 1 day, and then dried at 110 ° C. for 20 hours.
（２） （１）で得られた乾燥物を、コークスブリーズ
中にて800℃で焼成した。(2) The dried product obtained in (1) was calcined in a coke breeze at 800 ° C.
（３） （１）で得られた乾燥物を、コークスブリーズ
中にて1400℃で焼成した。(3) The dried product obtained in (1) was calcined in a coke breeze at 1400 ° C.
比較例１〜３ 実施例と同様にして、第１表に示す配合割合で各種吹付
耐火物を製造し、実施例と同様の物性測定を行なつた。
結果を第２表に示す。尚、比較例１は、アルミナセメン
トを結合材とした従来の吹付耐火物であり、比較例２
は、無機カルシウム化合物を使用しない以外は本発明と
同組成の吹付耐火物であり、比較例３は、アルミナセメ
ントを使用しない以外は本発明と同組成の吹付耐火物で
ある。Comparative Examples 1 to 3 Various sprayed refractory materials were produced in the same proportions as shown in Table 1 in the same manner as in Examples, and the same physical properties as those in Examples were measured.
The results are shown in Table 2. In addition, Comparative Example 1 is a conventional sprayed refractory using alumina cement as a binder, and Comparative Example 2
Is a spray refractory having the same composition as the present invention except that no inorganic calcium compound is used, and Comparative Example 3 is a spray refractory having the same composition as the present invention except that alumina cement is not used.
第２表から、本発明吹付耐火物が、従来の耐火物に比べ
優れた強度を示すことが判る。また、本発明吹付耐火物
の必須成分のうちのいずれか１つが欠けても、強度が著
しく低下することが判る。 It can be seen from Table 2 that the sprayed refractory material of the present invention exhibits superior strength to the conventional refractory material. It can also be seen that even if any one of the essential components of the sprayed refractory of the present invention is lacking, the strength is significantly reduced.
本発明耐火物（実施例１）及び従来の耐火物（比較例
１）を混銑車に吹付補修し、その耐用性を比較した。本
発明耐火物は95％の付着率を示し、吹付時の材料の拡が
り具合、流落の有無、硬化性状などの作業性は良好であ
つた。尚、付着率は以下の様にして算出した。即ち付着
率（％）＝ （リバウンドロスとは、耐火物を吹付けた際に、炉壁等
からリバウンドし、炉壁に付着しないで落下したもので
ある。）従来の耐火物は90％の付着率であり、作業性は
良くなかつた。耐用性は、従来品が30チヤージであつた
のに対し、本発明品は50チヤージであり、従来品の約1.
7倍の耐用性を示した。The refractory material of the present invention (Example 1) and the conventional refractory material (Comparative Example 1) were spray-repaired on a mixed pig car, and their durability was compared. The refractory material of the present invention showed an adhesion rate of 95%, and had good workability such as the spread of the material at the time of spraying, the presence or absence of runoff, and the hardening property. The adhesion rate was calculated as follows. That is, the adhesion rate (%) = (Rebound loss means that when a refractory material is sprayed, it rebounds from the furnace wall, etc. and falls without adhering to the furnace wall.) Conventional refractory materials have a 90% adherence rate and workability. I'm sorry The durability of the conventional product was 30 charge, while the durability of the present invention was 50 charge, which is about 1.
The durability was 7 times.
Claims (2)
耐火物配合物100重量部、アミンシリケート0.3〜２重量
部、無機カルシウム化合物0.03〜２重量部及び有機カル
シウム塩0.03〜２重量部からなることを特徴とする吹付
耐火物。1. Comprised of 100 parts by weight of a refractory compound containing 1 to 10% by weight of alumina cement, 0.3 to 2 parts by weight of amine silicate, 0.03 to 2 parts by weight of an inorganic calcium compound and 0.03 to 2 parts by weight of an organic calcium salt. A sprayed refractory that is characterized by that.
フラワー0.5〜８重量％を含有する耐火物配合物100重量
部、アミンシリケート0.3〜２重量部、無機カルシウム
化合物0.03〜２重量部及び有機カルシウム塩0.03〜２重
量部とからなることを特徴とする吹付耐火物。2. 100 parts by weight of a refractory compound containing 1 to 10% by weight of alumina cement and 0.5 to 8% by weight of silica flour, 0.3 to 2 parts by weight of amine silicate, 0.03 to 2 parts by weight of inorganic calcium compound and organic calcium. A sprayed refractory material comprising 0.03 to 2 parts by weight of salt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61110131A JPH0764652B2 (en) | 1986-05-13 | 1986-05-13 | Sprayed refractory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61110131A JPH0764652B2 (en) | 1986-05-13 | 1986-05-13 | Sprayed refractory |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62265181A JPS62265181A (en) | 1987-11-18 |
| JPH0764652B2 true JPH0764652B2 (en) | 1995-07-12 |
Family
ID=14527809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61110131A Expired - Lifetime JPH0764652B2 (en) | 1986-05-13 | 1986-05-13 | Sprayed refractory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0764652B2 (en) |
-
1986
- 1986-05-13 JP JP61110131A patent/JPH0764652B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62265181A (en) | 1987-11-18 |
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