JPS6116750B2 - - Google Patents
Info
- Publication number
- JPS6116750B2 JPS6116750B2 JP58222174A JP22217483A JPS6116750B2 JP S6116750 B2 JPS6116750 B2 JP S6116750B2 JP 58222174 A JP58222174 A JP 58222174A JP 22217483 A JP22217483 A JP 22217483A JP S6116750 B2 JPS6116750 B2 JP S6116750B2
- Authority
- JP
- Japan
- Prior art keywords
- phosphoric acid
- spraying
- spray
- refractory
- 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
Links
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 56
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 27
- 239000007921 spray Substances 0.000 claims description 22
- 238000005507 spraying Methods 0.000 claims description 22
- 239000011819 refractory material Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 239000011822 basic refractory Substances 0.000 claims 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000009970 fire resistant effect Effects 0.000 description 3
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 description 3
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 239000001506 calcium phosphate Substances 0.000 description 2
- 229910000389 calcium phosphate Inorganic materials 0.000 description 2
- 235000011010 calcium phosphates Nutrition 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 239000004137 magnesium phosphate Substances 0.000 description 2
- 229910000157 magnesium phosphate Inorganic materials 0.000 description 2
- 229960002261 magnesium phosphate Drugs 0.000 description 2
- 235000010994 magnesium phosphates Nutrition 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- SKZKKFZAGNVIMN-UHFFFAOYSA-N Salicilamide Chemical compound NC(=O)C1=CC=CC=C1O SKZKKFZAGNVIMN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Ceramic Products (AREA)
Description
マグネシア、ドロマイド等の塩基性材とリン酸
液を混合すると即反応を起し、リン酸マグネシウ
ム、リン酸カルシウム等を生成し固化することが
知られている。一方、近時、製鉄所等では即硬性
耐火材の要望が高まつてきており、前記組み合せ
の耐火材もこの要望を満たすことのできる耐火材
の一種となり得る。しかしながら塩基性材とリン
酸液の反応は瞬間的であるがために、施工性の点
で問題があり殆んど実施の例を見ない。
すなわち、塩基性材とリン酸液のミキサー等に
よる混練は不可能であり、また、吹付施工におい
ても(1)吹付ノズルの閉塞、(2)リン酸液の粘性が高
いことから耐火骨材とリン酸液の混合不良、(3)タ
ンク、吹付ノズル等の腐食、(4)リン酸液が強酸で
あることから取扱い上の問題点等がある。
本発明は塩基性材とリン酸の反応による即硬性
を付与した耐火材系において上記欠点を解消せし
めた吹付方法を提供するものであり、それはマグ
ネシア、ドロマイト等の塩基性材を10％以上含む
耐火骨材中に粉末リン酸を混入したことを特徴と
し、吹付ノズル部で吹付媒液と混合して吹付ける
ことを特徴とする耐火材吹付方法である。
以下に本発明を詳細する。
粉末リン酸は最近製造開発されたものであり、
それはシリカ（SiO2）にリン酸（H3PO4）を固着さ
せたものであり、H3PO4固着率は70〜75％のもの
が一般的である。但し本発明に使用されるものは
H3PO4固着率70％以下のものでも使用可能であ
る。
本発明の吹付材は吹付施工にのみ使用できるも
ので、ミキサー等により混練使用することは、塩
基性材と液体に溶解したリン酸との反応が瞬間的
となり不可能である。吹付施工の場合、吹付ノズ
ル部で初めて粉末リン酸を含む耐火骨材と吹付媒
液とが接触し、混合されながら所定部へ吹付けら
れる。この時吹付媒液に接触した耐火骨材中の粉
末リン酸は吹付媒液に溶解されながら、かつ塩基
性材と反応しながら所定部へ吹付けられ、即反応
固化する。もちろん、粉末リン酸の一部は吹付け
られた後に前記の如き過程を経るものである。
以上の如くリン酸に液体を使用する場合に比べ
て、本発明は粉末リン酸が吹付媒液に溶解する時
間的余裕があることから吹付ノズルの閉塞防止が
可能となる。粉末リン酸の耐火骨材中への混入量
は、使用される条件及びリン酸固着率によつて異
なるが、リン酸固着率70〜75％級で上限約20％で
ある。それは粉末リン酸に吸湿性があることに起
因する骨材タンク内または移送ホース内での骨材
の詰まりである。すなわち、骨材は骨材タンク内
から所定部へ吹付けられるまで圧縮空気に接する
からである。
粉末リン酸の耐火骨材への混入量の下限はイ）
吹付体の強度付与程度、ロ）他の結合剤との併用
等により変化するが、本発明の特徴を発現させる
のはリン酸固着率70〜75％級で約１％である。
一方吹付媒液としては、粉末リン酸が溶解でき
る水または一価もしくは多価のアルコール類が使
用される。これら吹付媒液はリン酸液に比較して
粘性が低いことから吹付時に耐火骨材との混合性
が良好で、かつ中性であることからタンク及び吹
付ノズル等の腐食の心配はなく、その上取り扱い
上の問題点も解消される。更には吹付媒液にアル
コール類を使用すれば非水系吹付材として転炉用
等に歓迎される吹付材となる。なお本発明吹付組
成物において耐火骨材中に塩基性材を10％以上含
有させた理由は、本発明の吹付材がマグネシア
（MgO）、ドロマイト（MgCO3・CaCO3）等の塩
基性材とリン酸（H3PO4）の急速な反応によりリ
ン酸マグネシウム〔Mg3（PO4）2〕及び／またはリ
ン酸カルシウム〔Ca3（PO4）2〕を生成させ、即硬
性を付与せしめたことを特徴としたものであつ
て、その塩基性材の耐火骨材中の含有量が10％以
下の場合には上記リン酸マグネシウム及び／また
はリン酸カルシウムの生成量が少ないことから吹
付材の接着性が著しく低下すると共に吹付体の強
度発現が十分でないことによる。また耐火骨材中
に含有される塩基性材の粒度は、リン酸との接触
面積を増大させ、反応促進を図る目的から微粉
（好ましくは0.3mm以下）が好ましい。
一方、塩基性材以外の耐火骨材は一般に使用さ
れている酸性、中性及び非酸化性耐火骨材いずれ
でも使用可能である。
以下に本発明の耐火性吹付材による吹付試験結
果を実施例により説明する。
実施例 １
第１表に示す如くの耐火骨材をエチレングリコ
ールを吹付媒液として、石炭ガス化炉の水冷箱被
覆用としてノズル部で混合吹付施工し、実使用に
供した。
It is known that when a basic material such as magnesia or dolomide is mixed with a phosphoric acid solution, an immediate reaction occurs, producing magnesium phosphate, calcium phosphate, etc., and solidifying the material. On the other hand, in recent years, there has been an increasing demand for quick-hardening refractories in steel mills and the like, and the above-mentioned combination of refractories can also be a type of refractory material that can satisfy this demand. However, since the reaction between the basic material and the phosphoric acid solution is instantaneous, there are problems in terms of workability, and there are almost no examples of implementation. In other words, it is impossible to mix basic material and phosphoric acid solution with a mixer, and even in spraying construction, it is difficult to mix fireproof aggregates due to (1) clogging of the spray nozzle and (2) high viscosity of phosphoric acid solution. There are problems such as poor mixing of the phosphoric acid solution, (3) corrosion of the tank, spray nozzle, etc., and (4) problems in handling because the phosphoric acid solution is a strong acid. The present invention provides a spraying method that eliminates the above-mentioned drawbacks in a refractory material system that has been given instant hardening properties through the reaction of a basic material and phosphoric acid, and which contains 10% or more of a basic material such as magnesia or dolomite. This is a refractory material spraying method characterized in that powdered phosphoric acid is mixed into the refractory aggregate, and is sprayed after being mixed with a spraying medium at a spray nozzle. The present invention will be explained in detail below. Powdered phosphoric acid is a recently developed product.
It is made by fixing phosphoric acid (H 3 PO 4 ) to silica (SiO 2 ), and the H 3 PO 4 fixation rate is generally 70 to 75%. However, those used in the present invention are
It is also possible to use H 3 PO 4 with a fixation rate of 70% or less. The spray material of the present invention can only be used for spray construction, and kneading with a mixer or the like is impossible because the reaction between the basic material and the phosphoric acid dissolved in the liquid will be instantaneous. In the case of spraying construction, the refractory aggregate containing powdered phosphoric acid and the spray medium first come into contact at the spray nozzle section, and are sprayed onto a predetermined area while being mixed. At this time, the powdered phosphoric acid in the refractory aggregate that has come into contact with the spraying medium is sprayed onto a predetermined area while being dissolved in the spraying medium and reacting with the basic material, causing an immediate reaction and solidification. Of course, some of the powdered phosphoric acid undergoes the process described above after being sprayed. As described above, compared to the case where liquid phosphoric acid is used, in the present invention, there is more time for powdered phosphoric acid to dissolve in the spraying medium, so that it is possible to prevent the spray nozzle from clogging. The amount of powdered phosphoric acid mixed into the refractory aggregate varies depending on the conditions of use and the phosphoric acid fixation rate, but the upper limit is about 20% with a phosphoric acid fixation rate of 70 to 75%. It is aggregate clogging in the aggregate tank or transfer hose due to the hygroscopic nature of powdered phosphoric acid. That is, the aggregate is in contact with compressed air until it is blown from within the aggregate tank to a predetermined portion. The lower limit of the amount of powdered phosphoric acid mixed into refractory aggregate is a)
Although it varies depending on the degree of strength imparted to the spray body, b) the combined use with other binders, etc., the characteristics of the present invention are manifested at a phosphoric acid fixation rate of about 1% in the 70 to 75% range. On the other hand, water or monohydric or polyhydric alcohols in which powdered phosphoric acid can be dissolved is used as the spraying medium. These spray medium liquids have a lower viscosity than phosphoric acid liquids, so they mix well with refractory aggregates during spraying, and because they are neutral, there is no worry about corrosion of tanks and spray nozzles, etc. Problems in handling are also resolved. Furthermore, if alcohol is used as the spraying medium, the spraying material will be welcomed as a non-aqueous spraying material for use in converters and the like. The reason why the fireproof aggregate in the spray composition of the present invention contains 10% or more of a basic material is that the spray material of the present invention contains basic materials such as magnesia (MgO) and dolomite (MgCO 3 / CaCO 3 ). The rapid reaction of phosphoric acid (H 3 PO 4 ) produces magnesium phosphate [Mg 3 (PO 4 ) 2 ] and/or calcium phosphate [Ca 3 (PO 4 ) 2 ], giving it instant hardening properties. If the content of the basic material in the refractory aggregate is 10% or less, the adhesion of the sprayed material will be significantly reduced due to the small amount of magnesium phosphate and/or calcium phosphate produced. This is because the strength of the spray body is not sufficiently developed. Further, the particle size of the basic material contained in the refractory aggregate is preferably fine (preferably 0.3 mm or less) for the purpose of increasing the contact area with phosphoric acid and promoting the reaction. On the other hand, as the refractory aggregate other than the basic material, any of the generally used acidic, neutral, and non-oxidizing refractory aggregates can be used. The results of spraying tests using the fire-resistant spraying material of the present invention will be explained below using Examples. Example 1 Refractory aggregates as shown in Table 1 were mixed and sprayed at a nozzle for coating a water-cooled box of a coal gasifier using ethylene glycol as a spraying medium, and the mixture was put into practical use.
【表】
水冷箱表面への吹付材の接着率は85％であり、
吹付体の特性は、下記第２表の通りである。[Table] The adhesion rate of the sprayed material to the surface of the water cooling box is 85%.
The properties of the spray body are shown in Table 2 below.
【表】
き測定不可
実施例 ２[Table] Example 2 where measurement is not possible
【表】【table】
【表】
第３表に示す如くの耐火骨材を水を吹付媒体と
して吹付ノズル部で混合し、アルミナ質レンガ表
面へ吹付試験を行なつた。その結果、レンガ表面
への吹付材の接着率は、90％であり、その吹付体
の特性は、下記第４表の通りである。[Table] Refractory aggregates as shown in Table 3 were mixed in a spray nozzle using water as a spraying medium, and a spraying test was conducted on the surface of an alumina brick. As a result, the adhesion rate of the sprayed material to the brick surface was 90%, and the properties of the sprayed material are as shown in Table 4 below.
【表】 実施例 ３【table】 Example 3
【表】【table】
【表】
第５表に示す如くの耐火骨材を、水を吹付媒液
にして吹付ノズル部で混合して、タンデイシユ内
面被覆材用として吹付施工し、実使用した。この
場合の吹付材の接着率は95％であり、５c.c.の使用
に十分耐用できた。吹付体の特性は次の第６表の
通りである。[Table] Refractory aggregates as shown in Table 5 were mixed in a spray nozzle using water as a spraying medium, and sprayed as a tundish inner surface coating material and used for actual use. The adhesion rate of the sprayed material in this case was 95%, which was sufficient to withstand use of 5 c.c. The properties of the spray body are shown in Table 6 below.
【表】
以上の如く、本発明の耐火性吹付材は、吹付媒
液としてリン酸液を使用した場合の欠点を解消で
きるものであり、作業性、安定性の向上を可能と
させ、しかも即硬性耐火吹付材を提供するもので
ある。[Table] As described above, the fire-resistant spray material of the present invention can eliminate the drawbacks of using phosphoric acid solution as a spray medium, and can improve workability and stability, as well as The present invention provides a hard fire-resistant spray material.
Claims (1)
に粉末リン酸を混入し、吹付ノズル部で吹付媒液
と混合して吹付けることを特徴とする、耐火材吹
付方法。1. A refractory material spraying method characterized by mixing powdered phosphoric acid into a refractory aggregate containing 10% or more of a basic refractory material, and spraying the mixture with a spraying medium at a spray nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22217483A JPS60118677A (en) | 1983-11-28 | 1983-11-28 | Refractory spray material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22217483A JPS60118677A (en) | 1983-11-28 | 1983-11-28 | Refractory spray material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60118677A JPS60118677A (en) | 1985-06-26 |
| JPS6116750B2 true JPS6116750B2 (en) | 1986-05-01 |
Family
ID=16778329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22217483A Granted JPS60118677A (en) | 1983-11-28 | 1983-11-28 | Refractory spray material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60118677A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04332387A (en) * | 1991-04-30 | 1992-11-19 | Kawasaki Refract Co Ltd | Spraying method for refractory material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53100192A (en) * | 1977-02-14 | 1978-09-01 | Mitsui Toatsu Chem Inc | Phosphoric acid-containing solid substance |
| JPS5454114A (en) * | 1977-10-06 | 1979-04-28 | Nippon Kokan Kk | Phosphateebound* nonshaped refractory |
| JPS581357A (en) * | 1981-06-26 | 1983-01-06 | Fujitsu Ltd | Data transmitting system |
-
1983
- 1983-11-28 JP JP22217483A patent/JPS60118677A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53100192A (en) * | 1977-02-14 | 1978-09-01 | Mitsui Toatsu Chem Inc | Phosphoric acid-containing solid substance |
| JPS5454114A (en) * | 1977-10-06 | 1979-04-28 | Nippon Kokan Kk | Phosphateebound* nonshaped refractory |
| JPS581357A (en) * | 1981-06-26 | 1983-01-06 | Fujitsu Ltd | Data transmitting system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60118677A (en) | 1985-06-26 |
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