JPH03187981A - Flame spraying material - Google Patents
Flame spraying materialInfo
- Publication number
- JPH03187981A JPH03187981A JP1326452A JP32645289A JPH03187981A JP H03187981 A JPH03187981 A JP H03187981A JP 1326452 A JP1326452 A JP 1326452A JP 32645289 A JP32645289 A JP 32645289A JP H03187981 A JPH03187981 A JP H03187981A
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- chromium
- weight
- refractory
- adhesion
- 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
- 239000000463 material Substances 0.000 title claims abstract description 24
- 238000010285 flame spraying Methods 0.000 title abstract description 3
- 239000002994 raw material Substances 0.000 claims abstract description 17
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011737 fluorine Substances 0.000 claims abstract description 10
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 10
- 238000009835 boiling Methods 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 239000011651 chromium Substances 0.000 claims abstract description 9
- 150000002222 fluorine compounds Chemical class 0.000 claims abstract description 9
- 238000007751 thermal spraying Methods 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 11
- 239000004571 lime Substances 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 10
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 abstract description 4
- 230000002542 deteriorative effect Effects 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 9
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 239000000395 magnesium oxide Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000003270 potassium fluoride Nutrition 0.000 description 1
- 239000011698 potassium fluoride Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Landscapes
- Ceramic Products (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、工業窯炉の耐火ライニングの形成あるいは補
修用として用いられる溶射材に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermal spray material used for forming or repairing refractory linings of industrial furnaces.
近年、例えば特開昭５７−１２６９６４号公報に記載さ
れているように、工業窯炉の耐火ライニングおよびその
補修に高温、高速の火炎中を耐火粉末を飛行させて溶融
し、吹き付ける溶射法が利用されるようになった。そし
て、通常の工業窯炉に対する溶射には、ＬＰＧ−酸素、
灯油−酸素、及びコークス粉−酸素炎等による火炎ある
いはプラズマ等による方法が採用されている。In recent years, as described in JP-A-57-126964, for example, a thermal spraying method in which refractory powder is melted and sprayed by flying through a high-temperature, high-velocity flame has been used for refractory lining of industrial furnaces and its repair. It started to be done. For thermal spraying in ordinary industrial furnaces, LPG-oxygen,
Methods using flames or plasma using kerosene-oxygen, coke powder-oxygen flames, etc. have been adopted.
この種の溶射では、例えば、マグネシア、クロミア、ラ
イム等、約２０００℃以上の融点を有する高融点耐火物
を溶射材としたときには、溶融あるいは軟化し難くリバ
ウンドロスが多い。そのため、高融点耐火物を溶射する
場合には、融点が溶射フレーム温度以下の結合材を使用
し、その結合材に４って高融点耐火物を補修箇所へ付着
させていた。In this type of thermal spraying, for example, when a high melting point refractory having a melting point of about 2000° C. or more is used as a thermal spraying material, such as magnesia, chromia, lime, etc., it is difficult to melt or soften and there is a large rebound loss. Therefore, when a high melting point refractory is thermally sprayed, a bonding material whose melting point is below the temperature of the thermal spraying flame is used, and the high melting point refractory is attached to the repaired area using the bonding material.
結合材としては、特公昭５６−２３９５０号公報、特公
昭６０−５３２７３号公報、特開昭６３−１０７８７３
号公報に開示されているようにスラグの使用、特開昭６
３−２１５５７９号公報にはセメントの使用、さらには
、特開昭６３−１０７８７２号公報にはＦｅ２Ｏ，の使
用が提案されている。As the binding material, Japanese Patent Publication No. 56-23950, Japanese Patent Publication No. 60-53273, and Japanese Patent Application Laid-open No. 63-107873 are used.
The use of slag as disclosed in Japanese Patent Publication No. 6
3-215579 proposes the use of cement, and JP-A-63-107872 proposes the use of Fe2O.
溶射材へ添加配合されるこれらの結合材は、溶射材の溶
融を促進し、溶射体の緻密化、補修箇所への接着性を向
上させる。These binders added to the thermal spray material promote melting of the thermal spray material, make the thermal spray body denser, and improve adhesion to the repaired area.
しかし、スラグ等の結合材は比較的低融点であるため多
量に添加すると溶射体の耐火性及び耐食性が低下したり
、また、スラグ等と高融点耐火物との材質の相違から、
両者がなじｔず、溶射後の接着性及び強度が不充分とな
りやすい欠点がある。However, since binders such as slag have a relatively low melting point, adding a large amount may reduce the fire resistance and corrosion resistance of the sprayed body.Also, due to the difference in materials between slag and other high melting point refractories,
There is a drawback that the two are not compatible and the adhesion and strength after thermal spraying tend to be insufficient.
とくに、溶鉄、溶融スラグと直接接触する製鋼用転炉、
取鍋等の内張リライニングや補修用として用いる場合に
は、接着性と耐食性の両立は非常に困難である。In particular, steelmaking converters that come into direct contact with molten iron and molten slag,
When used for relining or repairing ladles and the like, it is extremely difficult to achieve both adhesion and corrosion resistance.
本発明において解決すべき課題は、上記従来の溶射に際
しての問題点を解消して、高融点の耐火材料の溶射にも
問題を生じることなく適用できる溶射材を提供すること
にある。The problem to be solved by the present invention is to provide a thermal spraying material that solves the above-mentioned problems in conventional thermal spraying and can be applied to thermal spraying of high-melting-point refractory materials without causing any problems.
本発明の溶射材は、沸点が１８００℃以上を有する高沸
点の弗素化合物を弗素分として０．１〜１０重量％含有
せしめ、残部を耐火原料から構成することによって上記
課題を達成した。The thermal spray material of the present invention has achieved the above object by containing a high boiling point fluorine compound having a boiling point of 1800° C. or higher in an amount of 0.1 to 10% by weight as fluorine content, and the remainder being made up of refractory raw materials.
弗素化合物を含有させることにより耐食性を低下させる
ことなく付着率、接着性１強度等に関して、従来の技術
に比べ非常に優れた溶射材が得られる。特筆すべき点は
、接着性が著しく向上する点である。By containing a fluorine compound, it is possible to obtain a thermal spray material that is extremely superior to conventional techniques in terms of adhesion rate, adhesive strength, etc., without reducing corrosion resistance. What is noteworthy is that the adhesion is significantly improved.
これは、弗素化合物を含有せしめることによって、施工
箇所のれんかに浸潤しやすくなり、れんがとの反応性が
増加し、そのために接着性が非常に良好になると考えら
れる。It is thought that by containing a fluorine compound, it becomes easier to infiltrate into the brickwork at the construction site, increasing the reactivity with the brickwork, and as a result, the adhesion becomes very good.
溶射材中の耐火材料としては、アルミナ−クロム質原料
、マグネシア−クロム質原料、マグネシア−ライム質原
料系等が挙げられる。Examples of the refractory material in the thermal spray material include alumina-chromium raw materials, magnesia-chromium raw materials, magnesia-lime raw materials, and the like.
弗素化合物の使用によって、溶射体の耐火性と耐食性の
多少の低下を免れない。従って、これを防ぐためには、
各県において、各々、Ｃｒ、Ｏ，成分を少なくとも１５
重量％以上、ＭｇＯ成分を少なくとも５０重量％以上と
なるように配合する必要がある。The use of fluorine compounds inevitably reduces the fire resistance and corrosion resistance of the thermal spray body to some extent. Therefore, to prevent this,
In each prefecture, at least 15% of Cr, O, and
It is necessary to mix the MgO component in an amount of at least 50% by weight.
弗素化合物としては、弗化カルシウム（沸点２５００℃
）、弗化マグネシウム（２２６０℃）等、沸点の高いも
のが使用できる。しかし、弗化ナトリウム、弗化カリウ
ム等のように沸点が低く、火炎中で揮発消失してしまう
ものは好ましくない。As a fluorine compound, calcium fluoride (boiling point 2500℃
), magnesium fluoride (2260°C), etc. with a high boiling point can be used. However, materials such as sodium fluoride and potassium fluoride, which have a low boiling point and evaporate and disappear in a flame, are not preferred.
さらに、例えば、Ｃａｂ、を含有するＣａＯ系化合物、
ＭｇＦ２を含有するＭｇＯ系化合物のように、弗素を含
有する化合物であれば、任意配合することができる。Further, for example, a CaO-based compound containing Cab,
Any compound containing fluorine, such as an MgO-based compound containing MgF2, can be blended.
弗素分の添加に際しては、前述の弗素化合物の１種又は
２種以上を組み合わせることも可能であるが、弗素分の
添加量は、（１，１〜１０重量％、好ましくは０．５〜
５重量％である。０．１重量％未満ではその効果が得ら
れない。１０重量％を超えると溶射材の耐火性が低下し
、溶射材の耐食性が著しく劣化する。When adding fluorine, it is possible to combine one or more of the above-mentioned fluorine compounds, but the amount of fluorine added is (1.1 to 10% by weight, preferably 0.5 to 10% by weight).
It is 5% by weight. If it is less than 0.1% by weight, the effect cannot be obtained. If it exceeds 10% by weight, the fire resistance of the sprayed material will decrease, and the corrosion resistance of the sprayed material will significantly deteriorate.
本発明の実施例を比較例とともに第１〜３表に示す。 Examples of the present invention are shown in Tables 1 to 3 along with comparative examples.
溶射材の粒度はいずれも３００μｍ以下であり、プロパ
ン−酸素の火炎を熱源としたものである。The particle size of the thermal spraying materials was 300 μm or less, and a propane-oxygen flame was used as the heat source.
第１表はＭｇＯ−ＣａＯ系の耐火材を示す。同表から明
らかなとおり、融点の低いスラグ、Ｆｅ２Ｏ３の添加は
付着性において優れている反面、接着性、耐食性に劣る
。Table 1 shows MgO-CaO based refractory materials. As is clear from the table, the addition of Fe2O3, a slag with a low melting point, is excellent in adhesion, but poor in adhesion and corrosion resistance.
弗素含有量を０．１〜１０重量％含有させた本発明の実
施例では付着性、接着性の何れにおいても優れている。Examples of the present invention containing 0.1 to 10% by weight of fluorine are excellent in both adhesion and adhesion.
しかしながら、弗素含有量が０，１重量％以下では付着
性、密着性に劣り、また、弗素含有量が１０重量％以上
では付着性、接着性には優れるが、耐食性が劣る。However, if the fluorine content is 0.1% by weight or less, the adhesion and adhesion will be poor, and if the fluorine content is 10% by weight or more, the adhesion and adhesion will be excellent, but the corrosion resistance will be poor.
また、第１表の比較例８に示しているように弗素の配合
によって、接着性は改善されてもＭｇＯ成分が５０重量
％以下では耐食性との両立が成り立たない。Further, as shown in Comparative Example 8 in Table 1, even if adhesion is improved by adding fluorine, if the MgO component is less than 50% by weight, corrosion resistance cannot be achieved.
以下、 第２表に 八β２０３ Ｃｒ２０３系、 表３にＭｇ０ ｒ２０３ 系の場合の例を示した。below, In Table 2 Eight β203 Cr203 series, Table 3 shows Mg0 r203 An example of the system is shown below.
（以下、
この頁余白）
〔発明の効果〕
本発明による火炎溶射材によって以下の効果を奏するこ
とができる。(Hereinafter, this page margin) [Effects of the Invention] The flame spraying material according to the present invention can provide the following effects.
（１）格別溶射条件を変更することなく、付着性、密着
性と耐食性が両立した溶射体を形成できる。(1) It is possible to form a thermal sprayed body that has both adhesion, adhesion, and corrosion resistance without changing special thermal spraying conditions.
（２） ライニングの形成、補修効果を上げることがで
き、工業窯炉の稼働率向上、補修工数の低減等に貢献す
る効果は極めて大きい。(2) The lining formation and repair effects can be improved, and the effect of contributing to improving the operating rate of industrial kilns, reducing the number of repair man-hours, etc. is extremely large.
Claims (4)
を弗素分として０．１〜１０重量％含有し、残部が耐火
原料からなる溶射材。1. A thermal spraying material containing 0.1 to 10% by weight of a high-boiling fluorine compound having a boiling point of 1800° C. or more as a fluorine content, with the remainder being a refractory raw material.
３成分を少なくとも１５重量％以上含有するアルミナ−
クロム質原料である溶射材。2. In the description of claim 1, the refractory raw material is Cr_2O_
Alumina containing at least 15% by weight of three components
Thermal spray material is a chromium raw material.
少なくとも５０重量％以上含有するマグネシア−クロム
質原料である溶射材。3. The thermal spray material according to claim 1, wherein the refractory raw material is a magnesia-chromium raw material containing at least 50% by weight of an MgO component.
少なくとも５０重量％以上含有するマグネシア−ライム
質原料である溶射材。4. The thermal spray material according to claim 1, wherein the refractory raw material is a magnesia-lime raw material containing at least 50% by weight of an MgO component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1326452A JPH03187981A (en) | 1989-12-15 | 1989-12-15 | Flame spraying material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1326452A JPH03187981A (en) | 1989-12-15 | 1989-12-15 | Flame spraying material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03187981A true JPH03187981A (en) | 1991-08-15 |
Family
ID=18187969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1326452A Pending JPH03187981A (en) | 1989-12-15 | 1989-12-15 | Flame spraying material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03187981A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05345682A (en) * | 1992-06-15 | 1993-12-27 | Kurosaki Refract Co Ltd | Chromium based flame spraying material |
-
1989
- 1989-12-15 JP JP1326452A patent/JPH03187981A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05345682A (en) * | 1992-06-15 | 1993-12-27 | Kurosaki Refract Co Ltd | Chromium based flame spraying material |
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