JPH0438712B2 - - Google Patents
Info
- Publication number
- JPH0438712B2 JPH0438712B2 JP63221432A JP22143288A JPH0438712B2 JP H0438712 B2 JPH0438712 B2 JP H0438712B2 JP 63221432 A JP63221432 A JP 63221432A JP 22143288 A JP22143288 A JP 22143288A JP H0438712 B2 JPH0438712 B2 JP H0438712B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- spraying
- powder
- weight percent
- sprayed
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 12
- 239000004115 Sodium Silicate Substances 0.000 claims description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 6
- 238000007654 immersion Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-YPZZEJLDSA-N carbon-10 atom Chemical compound [10C] OKTJSMMVPCPJKN-YPZZEJLDSA-N 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 9
- 239000007921 spray Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 235000012245 magnesium oxide Nutrition 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 2
- 238000009849 vacuum degassing Methods 0.000 description 2
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 235000011430 Malus pumila Nutrition 0.000 description 1
- 235000015103 Malus silvestris Nutrition 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 229910001515 alkali metal fluoride Inorganic materials 0.000 description 1
- 229910000318 alkali metal phosphate Inorganic materials 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
〔産業上の利用分野〕
本発明はRH真空脱ガス装置の浸漬管等の補修
に用いる吹付け補修方法に関するものである。
〔従来の技術〕
RH炉等の真空脱ガス装置の浸漬管を補修する
際に、近年、熱間作業における作業環境の改善、
省力化及び作業の迅速化を目的として自動吹付け
装置が普及しつつある。しかしながら、従来のタ
イプの吹付け材では浸漬管内壁温度が600〜800℃
と高いことに起因し、付着率の低下、接着強度の
低下及び組織劣化を生じ、所望の耐用が得られな
いのが実状であつた。
本発明者等はかかる従来材料の欠点を改善すべ
く、特開昭63−70091号公報において高耐用材料
の使用を提案している。同材料の特徴は、珪酸ソ
ーダ溶液を使用することによる高付着性、高接着
強度と適量のMgO−Ｃ粗角を使用に耐食性、耐
スラグ浸潤性の改善であり、溶鋼流による摩耗溶
損を受け、苛酷な使用条件下にさらされる浸漬管
内壁部において3ch以上の耐用が得られている。
〔発明が解決しようとする課題〕
しかしながら、近年、鋼の品質向上の要求に伴
う処理時間の延長、処理比率の増大を生じ、吹付
け補強終了後から処理を開始する至る時間が長く
とれない。かかる連続操業下においては、従来、
吹付け補修材の高耐用化を目的として実施してい
た吹付け補強終了後のバーナー加熱処理工程を省
くことを余儀なくされた。バーナー加熱処理は吹
付け材料の強度向上、内張りれんがとの接着性向
上の点から極めて有効であり、この加熱処理を省
いた使用条件下では補修材の著しい耐用の低下を
もたらした。本発明はかかる連続操業条件下、即
ちバーナー加熱処理なし、短時間養生の条件でも
高強度、高接着強度を発現し、高耐用性を有する
材料の吹付方法を提供しようとするものである。
〔課題を解決するための手段〕
本発明は、粒度調整されたMgO原料30〜60重
量％及びMgO−Ｃ粗角（固定炭素10〜20％）40
〜70重量％から成る耐火骨材100重量％に対して、
硬化促進剤0.1〜2.0重量％、金属粉0.1〜2.0重量
％配合をした吹付け粉体とNa2O4〜６重量％、
SiO217〜20重量％の組成から成る珪酸ソーダ溶
液を、吹付け粉体100重量％に対して18〜25重量
％の割合で、ノズル部手前の注入部において混合
しつつ吹き付けることを特徴とするものである。
〔作用〕
MgO−Ｃ粗角の使用、珪酸ソーダ溶液の使用
は材料の付着性、接着性、耐食性、耐スラグ浸潤
性を改善する目的であり、既に提案した特開昭63
−70091号公報と同様の効果を期待したものであ
る。本発明の特徴は吹付前の混合用バインダーで
あるアルカリ性の珪酸ソーダと反応することが可
能な金属粉を少量0.1〜2.0重量％を添加したこと
にある。
金属粉として代表的なSiは、高速流のアルカリ
溶液、例えば水酸化ナトリウム溶液との衝突混合
で下記の反応を急激に生じ、吹付と同時に発熱反
応をもたらす。
nSi＋2NaOH＋（2n−１）H2Ｏ→Na2Ｏ・nSiO2
＋2nH2↑
この反応の反応熱は極めて大きく、吹付と同時
に材料の乾燥を促進し、連続操業条件下における
バーナー加熱の必要性をなくすと同時に短時間養
生を可能する。
使用できる金属としては上記Siをはじめとし
て、アルカリとの反応により発熱をもたらす性質
のものであれば良く、Mg、A1等が挙げられる。
またこれらの合金を使用することも可能である。
金属粉の使用量としては耐火骨材100重量％に対
して0.1〜2.0重量％に限定される。0.1重量％以下
では強度発現性に乏しく、また2.0重量％以上で
は強度発現性は良好なものの、反応で生じるH2
ガスの影響により吹付施工体に亀裂を生じさせる
ことから好ましくない。
第１図は熱間における金属添加量と強度発現性
の関係を示したものである。
サンプル作成条件は炉内を500℃にキープし予
めセツトしておいた専用金枠に耐火材料を吹付し
素早く取り出し脱枠を行う。800℃×３日加熱後
のサンプルについては500℃で吹付を行つた後に
800℃迄昇温し３時間キープするその後炉内より
取出し脱枠を行う。
この図から明らかなように強度発現性に関して
は被吹付体温度が500℃の時でも0.1重量％以上が
良好である。即ち金属粉が0.1重量％以上含有さ
せておくことにより被吹付体の温度が500℃以上
あれば吹付後直ちに溶融金属処理に供することが
できる。又時間的余裕があれば吹付後800℃で３
時間の加熱を行うことにより更に強度が向上す
る。
本発明における吹付補修材については、熱間に
おける高付着性を維持する目的で硬化促進剤を使
用しているが、この硬化促進剤としては、珪酸ソ
ーダの硬化剤としてよく知られている無機酸、有
機酸類、Ca、Mg、Al、Ba、Zr等の多価金属化
合物、アルカリ金属炭酸塩、アルカリ金属燐酸
塩、弗化物、セメント類のうち、例えば燐酸アル
ミニウム、蓚酸、クエン酸、酒石酸、リンゴ酸、
ｐ−トルエンスルホン酸、生石灰、消石灰、酸化
マグネシウム、塩化カルシウム、硝酸カルシウ
ム、炭酸水素１ナトリウム、ヘキサメタリン酸ソ
ーダ、珪弗化ソーダ、弗化アンモニウム、アルミ
ン酸カルシウム等が挙げられる。また使用する珪
酸ソーダはNa2O4〜６重量％及びSiO217〜20重
量％の組成をもつものである。この珪酸ソーダ溶
液をノズル部手前の注入部で吹付け粉体に混合さ
せることにより、速硬性を利用した吹付作業が行
われる。
〔実施例〕
以下、実施例によつて本発明の効果を具体的に
説明する。第１表は、配合割合及び得られた補修
耐火層の特性を示すものである。
[Industrial Application Field] The present invention relates to a spray repair method used for repairing immersion pipes, etc. of RH vacuum degassing equipment. [Conventional technology] When repairing the immersion tube of vacuum degassing equipment such as RH furnace, in recent years, improvement of the working environment during hot work,
Automatic spraying devices are becoming popular for the purpose of saving labor and speeding up work. However, with the conventional type of sprayed material, the temperature of the inner wall of the immersion tube is 600 to 800℃.
The actual situation is that the desired durability is not achieved due to the high level of adhesiveness, resulting in a decrease in adhesion rate, a decrease in adhesive strength, and deterioration of the structure. In order to improve the drawbacks of such conventional materials, the present inventors have proposed the use of highly durable materials in Japanese Patent Application Laid-open No. 70091/1983. The characteristics of this material include high adhesion and high adhesive strength due to the use of a sodium silicate solution, and improved corrosion resistance and slag infiltration resistance due to the use of an appropriate amount of MgO-C rough angle. The inner wall of the immersion tube, which is exposed to severe usage conditions, has a durability of 3 channels or more. [Problems to be Solved by the Invention] However, in recent years, demands for improving the quality of steel have led to longer processing times and increased processing ratios, making it difficult to take a long time from the end of spray reinforcement to the start of processing. Under such continuous operation, conventionally,
It was necessary to omit the burner heat treatment process that had been carried out after the completion of spray reinforcement to increase the durability of spray repair materials. Burner heat treatment is extremely effective in improving the strength of the sprayed material and its adhesion to lining bricks, but under usage conditions where this heat treatment was omitted, the durability of the repair material was significantly reduced. The present invention aims to provide a method for spraying a material that exhibits high strength and adhesive strength and has high durability even under such continuous operating conditions, that is, without burner heat treatment and under short curing conditions. [Means for Solving the Problems] The present invention provides particle size-adjusted MgO raw material 30 to 60% by weight and MgO-C rough angle (fixed carbon 10 to 20%) 40
For 100% by weight of refractory aggregate consisting of ~70% by weight,
Sprayed powder containing 0.1 to 2.0% by weight of curing accelerator and 0.1 to 2.0% by weight of metal powder, and 4 to 6% by weight of Na 2 O.
A sodium silicate solution having a composition of 17 to 20% by weight of SiO 2 is sprayed at a ratio of 18 to 25% by weight based on 100% by weight of the sprayed powder, while being mixed at the injection part in front of the nozzle part. It is something to do. [Function] The purpose of using MgO-C rough angle and sodium silicate solution is to improve the adhesion, adhesion, corrosion resistance, and slag infiltration resistance of the material, which was already proposed in JP-A-63.
This is expected to have the same effect as Publication No. -70091. A feature of the present invention is that a small amount of 0.1 to 2.0% by weight of metal powder that can react with alkaline sodium silicate, which is a mixing binder, is added before spraying. When Si, which is a typical metal powder, collides with a high-speed flow of an alkaline solution, such as a sodium hydroxide solution, it rapidly undergoes the following reaction, resulting in an exothermic reaction upon spraying. nSi+2NaOH+(2n-1)H 2 O→Na 2 O・nSiO 2
+2nH 2 ↑ The heat of reaction of this reaction is extremely large and accelerates the drying of the material at the same time as spraying, eliminating the need for burner heating under continuous operating conditions and allowing short curing times. Examples of metals that can be used include the above-mentioned Si, as long as they generate heat when reacted with alkali, and include Mg, A1, and the like.
It is also possible to use alloys of these.
The amount of metal powder used is limited to 0.1 to 2.0% by weight based on 100% by weight of the refractory aggregate. At 0.1% by weight or less, strength development is poor, and at 2.0% by weight or more, strength development is good, but H 2 generated in the reaction
This is not preferable because it causes cracks in the sprayed workpiece due to the influence of the gas. FIG. 1 shows the relationship between the amount of metal added and strength development during hot heating. The sample preparation conditions were to keep the temperature inside the furnace at 500℃, spray refractory material onto a special metal frame that had been set in advance, and then quickly take it out and remove the frame. For samples heated at 800℃ for 3 days, after spraying at 500℃
The temperature is raised to 800℃ and maintained for 3 hours, after which it is removed from the furnace and the frame is removed. As is clear from this figure, in terms of strength development, 0.1% by weight or more is good even when the temperature of the object to be sprayed is 500°C. That is, by containing 0.1% by weight or more of metal powder, if the temperature of the object to be sprayed is 500° C. or higher, it can be subjected to molten metal treatment immediately after spraying. Also, if you have time, 3 at 800℃ after spraying.
The strength is further improved by heating for a long time. In the spray repair material of the present invention, a curing accelerator is used for the purpose of maintaining high adhesion in hot conditions. , organic acids, polyvalent metal compounds such as Ca, Mg, Al, Ba, and Zr, alkali metal carbonates, alkali metal phosphates, fluorides, and cements, such as aluminum phosphate, oxalic acid, citric acid, tartaric acid, and apple. acid,
Examples include p-toluenesulfonic acid, quicklime, slaked lime, magnesium oxide, calcium chloride, calcium nitrate, monosodium hydrogen carbonate, sodium hexametaphosphate, sodium silicofluoride, ammonium fluoride, and calcium aluminate. The sodium silicate used has a composition of 4 to 6% by weight of Na 2 O and 17 to 20% by weight of SiO 2 . By mixing this sodium silicate solution with the powder to be sprayed at the injection part in front of the nozzle part, a spraying operation utilizing quick hardening properties is performed. [Example] Hereinafter, the effects of the present invention will be specifically explained with reference to Examples. Table 1 shows the blending ratio and the properties of the repaired fireproof layer obtained.
【表】【table】
以上に説明したように、本発明の吹付補修方法
においては、耐火骨材に金属粉、硬化促進剤を配
合してなり、熱間にて施工が行われた場合に、ア
ルカリと金属が急激に発熱反応を起こし脱水性が
向上し、強度発現性に優れるものとなる。その結
果、バーナーによる加熱工程が省かれた場合でも
良好な強度を有した施工体を形成することがで
き、残存率30〜50％となるまでに３回使用可能と
なつた。
As explained above, in the spray repair method of the present invention, metal powder and hardening accelerator are mixed with fireproof aggregate, and when construction is carried out in hot conditions, alkali and metal are rapidly released. It causes an exothermic reaction, improves dehydration properties, and provides excellent strength development. As a result, even when the heating process using a burner was omitted, a constructed body with good strength could be formed, and it was possible to use it three times until the survival rate was 30 to 50%.
第１図は熱間における金属添加量と強度発現性
の関係を示したグラフである。
FIG. 1 is a graph showing the relationship between the amount of metal added and strength development during hot heating.
Claims (1)
MgO−Ｃ粗角（固定炭素10〜20％）40〜70重量
％から成る耐火骨材100重量％に対して、硬化促
進剤0.1〜2.0重量％、金属粉0.1〜2.0重量％配合
した吹付け粉体とNa2O4〜６重量％、SiO217〜
20重量％の組成から成る珪酸ソーダ溶液を、吹付
け粉体100重量％に対して18〜25重量％の割合で、
ノズル部手前の注入部において混合しつつ吹き付
けることを特徴とする溶融金属浸漬管用吹付け補
修方法。1 30-60% by weight of MgO raw material with adjusted viscosity and
Spraying containing 0.1 to 2.0 weight percent of hardening accelerator and 0.1 to 2.0 weight percent of metal powder to 100 weight percent of fireproof aggregate consisting of 40 to 70 weight percent of MgO-C rough angle (fixed carbon 10 to 20 percent). Powder and Na 2 O 4 ~ 6% by weight, SiO 2 17 ~
A sodium silicate solution having a composition of 20% by weight is added at a ratio of 18 to 25% by weight based on 100% by weight of the sprayed powder.
A spraying repair method for a molten metal immersion pipe characterized by spraying while mixing at an injection part in front of a nozzle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63221432A JPH0274552A (en) | 1988-09-06 | 1988-09-06 | Spray repairing for molten metal dipping pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63221432A JPH0274552A (en) | 1988-09-06 | 1988-09-06 | Spray repairing for molten metal dipping pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0274552A JPH0274552A (en) | 1990-03-14 |
| JPH0438712B2 true JPH0438712B2 (en) | 1992-06-25 |
Family
ID=16766651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63221432A Granted JPH0274552A (en) | 1988-09-06 | 1988-09-06 | Spray repairing for molten metal dipping pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0274552A (en) |
-
1988
- 1988-09-06 JP JP63221432A patent/JPH0274552A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0274552A (en) | 1990-03-14 |
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