JP3018056B2 - CaO-SiO2 spray material - Google Patents
CaO-SiO2 spray materialInfo
- Publication number
- JP3018056B2 JP3018056B2 JP5338011A JP33801193A JP3018056B2 JP 3018056 B2 JP3018056 B2 JP 3018056B2 JP 5338011 A JP5338011 A JP 5338011A JP 33801193 A JP33801193 A JP 33801193A JP 3018056 B2 JP3018056 B2 JP 3018056B2
- Authority
- JP
- Japan
- Prior art keywords
- cao
- sio
- spray material
- present
- thermal spray
- 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 - Fee Related
Links
Landscapes
- Ceramic Products (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、工業窯炉の内張り耐火
物の形成、補修、コーティングあるいは耐火物品の形
成、補修、コーティングに用いられるＣａＯ−ＳｉＯ2
系溶射材料に関するものである。本発明が適用される対
象は、転炉、熱処理炉、加熱炉、均熱炉、電気炉、ロー
タリーキルン、焼却炉等の工業窯炉のほか、混銑車、取
鍋、脱ガス炉、タンディッシュ、酸素吹込みランス等で
ある。BACKGROUND OF THE INVENTION The present invention, formation of the refractory lining of industrial furnaces, repair, formation of a coating or a refractory article, repair, CaO-SiO 2 used in the coating
The present invention relates to a thermal spray material. The object to which the present invention is applied is a converter, a heat treatment furnace, a heating furnace, a soaking furnace, an electric furnace, a rotary kiln, an industrial kiln such as an incinerator, a mixed iron wheel, a ladle, a degassing furnace, a tundish, Oxygen blowing lance.
【０００２】[0002]
【従来の技術】ＣａＯは融点が高いことから、各種工業
窯炉のライニングあるいは吹付補修材料として使用され
ている。しかしながら、ＣａＯは融点が高く、火炎溶射
装置の火炎中で溶融しないため、従来ＣａＯを主体とし
た溶射材料としては使用されていなかった。2. Description of the Related Art Since CaO has a high melting point, it is used as a lining or spray repair material for various industrial kilns. However, since CaO has a high melting point and does not melt in the flame of a flame spraying apparatus, it has not been conventionally used as a thermal spray material mainly composed of CaO.
【０００３】そこで、ＣａＯを主体とした材料に金属鉄
粉または金属鉄粉と鉄酸化物を添加することにより、火
炎中で金属鉄粉を酸化させてその酸化熱により火炎温度
を高め、同時に酸化により生じた酸化鉄とＣａＯの反応
によりＣａＯ−Ｆｅ2 Ｏ3 系の低融点物を形成させる方
法が、特開昭５９−２０３７８２号公報に提案されてい
る。しかしながら、金属鉄粉を添加した溶射材料を使用
する場合、材料搬送中の安全性確保の観点から搬送ガス
として不活性ガスを使用する必要がある。ところが、溶
射材料と共に不活性ガスを火炎中に噴射すると、不活性
ガス自体をも加熱するため火炎温度が低下する。通常、
材料搬送ガスとして不活性ガスを使用する場合はこのよ
うな火炎温度の低下は問題とならないが、酸素等を搬送
ガスとして使用する場合は、火炎温度の低下によって火
炎中に投入できる材料の量を減少する必要があり、作業
性を劣化させるという難点がある。[0003] Therefore, by adding metallic iron powder or metallic iron powder and iron oxide to a material mainly composed of CaO, the metallic iron powder is oxidized in the flame, the heat of oxidation increases the flame temperature, and at the same time increases the oxidation temperature. method of forming a CaO-Fe 2 O 3 based low-melting of the reaction of iron oxide and CaO produced by has been proposed in JP-a-59-203782. However, when a thermal spray material to which metal iron powder is added is used, it is necessary to use an inert gas as a carrier gas from the viewpoint of ensuring safety during material transport. However, when the inert gas is injected into the flame together with the thermal spray material, the inert gas itself is also heated, so that the flame temperature decreases. Normal,
When an inert gas is used as a material carrier gas, such a decrease in flame temperature does not pose a problem, but when oxygen or the like is used as a carrier gas, the amount of material that can be put into the flame due to the decrease in flame temperature is reduced. It is necessary to reduce it, and there is a problem that the workability is deteriorated.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、このような
従来技術の問題点に鑑みて、ＣａＯ−ＳｉＯ2 系溶射材
料を提供するに当り、ＣａＯは融点が高く溶射材料とし
て使用する上においてＣａＯと反応して低融点化合物を
形成する必要があること、配合材としてＳｉＯ2を使用
する場合に、その配合料によって溶融性、耐食性に著し
い影響を及ぼすことを勘案して、良好な溶融性が得られ
且つ高耐食性を示すと共に溶射体の緻密化を図ることが
できる溶射材料を提供することを目的とする。[SUMMARY OF THE INVENTION The present invention, in view of the problems of the prior art, per to provide CaO-SiO 2 based spray material, CaO in order to use as high spray material melting point Considering that it is necessary to react with CaO to form a low melting point compound, and when using SiO 2 as a compounding material, the compounding material has a remarkable influence on the meltability and corrosion resistance, so that good melting property is considered. It is an object of the present invention to provide a thermal spraying material which can achieve a high thermal corrosion resistance and can make the thermal spray body denser.
【０００５】[0005]
【課題を解決するための手段】本発明は、前記課題を解
決すべく提供されたもので、その要旨とするところは、
ＣａＯ：６２〜８３ｗｔ％、ＳｉＯ2 ：１０〜３４ｗｔ
％、及びその他成分：７ｗｔ％以下からなることを特徴
とするＣａＯ−ＳｉＯ2 系溶射材料にある。SUMMARY OF THE INVENTION The present invention has been provided to solve the above problems, and the gist of the invention is as follows.
CaO: 62~83wt%, SiO 2: 10~34wt
%, And other components: in CaO-SiO 2 based spray material, characterized in that it consists of the following 7 wt%.
【０００６】[0006]
【構成および作用】本発明の溶射材料の組成を、Ｃａ
Ｏ：６２〜８３ｗｔ％、ＳｉＯ2 ：１０〜３４ｗｔ％、
及びその他成分：７ｗｔ％以下に限定した理由を説明す
る。本発明の溶射材料のＣａＯ量が６２ｗｔ％未満で
は、低融物が大量に生成するので耐食性が劣化し、また
８３ｗｔ％を超えると低融物の生成が少なくなるので溶
融性が劣るようになる。また、本発明の溶射材料のＳｉ
Ｏ2 量が３４ｗｔ％を超えると耐食性が劣化し、１０ｗ
ｔ％未満では溶融性が劣るようになる。また溶射材料の
Ｆｅ2 Ｏ3、ＦｅＯ、Ａｌ2Ｏ3、ＭｇＯ、Ｃｒ2Ｏ3、Ｚ
ｒＯ2、ＭｎＯ、Ｂ2 Ｏ3 、ＴｉＯ2、Ｋ2Ｏ、Ｎａ2Ｏ、
Ｐ2Ｏ3等の不可避的不純物が７ｗｔ％を超えると溶融性
は向上するが耐食性が劣化する。The composition of the thermal spray material of the present invention is
O: 62~83wt%, SiO 2: 10~34wt%,
And other components: The reason why the content is limited to 7 wt% or less will be described. If the CaO content of the thermal spray material of the present invention is less than 62 wt%, a low melt is generated in a large amount, so that the corrosion resistance is deteriorated. If the CaO content is more than 83 wt%, the low melt is less generated and the meltability becomes poor. . Further, the thermal spray material of the present invention
If the O 2 content exceeds 34 wt%, the corrosion resistance deteriorates and 10 w
If it is less than t%, the meltability will be poor. Further, the thermal spraying materials Fe 2 O 3 , FeO, Al 2 O 3 , MgO, Cr 2 O 3 , Z
rO 2 , MnO, B 2 O 3 , TiO 2 , K 2 O, Na 2 O,
If unavoidable impurities such as P 2 O 3 exceed 7 wt%, the melting property is improved but the corrosion resistance is deteriorated.
【０００７】本発明の溶射材料の粒径は、１．０ｍｍを
超えると溶射に際して、火炎中での熱伝達が不十分なた
め母材へ到達した時点でＣａＯとＳｉＯ2 との反応が不
十分となり溶融性が劣るようになるので、１．０ｍｍ以
下とする。好ましい粒度は０．８ｍｍ以下である。原料
については、ＣａＯ質材料として、ＣａＯ質クリンカ
ー、石灰石をＣＯ2ガス雰囲気下で加熱し、その表面に
ＣａＣＯ3 被膜を形成させたＣａＯ質クリンカー等を用
い、ＳｉＯ2 質材料としては、ＳｉＯ2 ９０ｗｔ％以上
の材料（珪石、珪砂の天然原料、コークス炉の使用後耐
火物、シリコン含有金属）を用い、ＣａＯ・ＳｉＯ2 質
材料として珪酸カルシウムを用いる。If the particle size of the thermal sprayed material of the present invention exceeds 1.0 mm, the reaction between CaO and SiO 2 is insufficient upon reaching the base material due to insufficient heat transfer in the flame during thermal spraying. Therefore, the meltability becomes inferior, so that the thickness is set to 1.0 mm or less. The preferred particle size is 0.8 mm or less. As for the raw material, CaO clinker and CaO clinker having limestone heated in a CO 2 gas atmosphere to form a CaCO 3 film on its surface are used as CaO material, and SiO 2 material is SiO 2 90% by weight or more of a material (natural raw material of silica stone and silica sand, refractory after use of coke oven, silicon-containing metal), and calcium silicate is used as a CaO.SiO 2 material.
【０００８】本発明の溶射材料を調製するにあたって
は、前記したＣａＯ質材料、ＳｉＯ2質材料、ＣａＯ・
ＳｉＯ2質材料を１．０ｍｍ以下、好ましくは０．８ｍ
ｍ以下に粉砕して、本発明により規定される化学組成範
囲になるように混合する。溶射方法は、従来どおり、プ
ロパン、灯油等の気体または液体燃料やコークス等の固
体燃料を燃料とした高速、高温火炎溶射装置を用いて行
う。溶射材料の搬送ガスは、Ｏ2、空気、Ｎ2、ＣＯ、Ｃ
Ｏ2、Ａｒや工場で発生する例えば高炉ガス、コークス
炉ガス、熱風炉ガスまたは転炉ガス等のうち一種または
二種以上を組合わせて使用できる。In preparing the thermal spray material of the present invention, the above-mentioned CaO-based material, SiO 2 -based material, CaO.
1.0 mm or less, preferably 0.8 m of SiO 2 material
m, and mixed so as to have a chemical composition range defined by the present invention. The thermal spraying method is conventionally performed using a high-speed, high-temperature flame thermal spraying apparatus using a gas such as propane or kerosene or a liquid fuel or a solid fuel such as coke as fuel. The carrier gas of the thermal spray material is O 2 , air, N 2 , CO, C
For example, one or a combination of two or more of O 2 , Ar, and a blast furnace gas, a coke oven gas, a hot blast oven gas, a converter gas, or the like generated in a factory can be used.
【０００９】[0009]
【実施例】本発明のＣａＯ−ＳｉＯ2 系溶射材料の実施
例を説明する。表１にＣａＯ−ＳｉＯ2 系溶射材料の製
造に用いた原料の化学組成を示し、表２〜表４にＣａＯ
−ＳｉＯ2 系溶射材料の本発明例と比較例を示す。溶射
材料は、規定の粒度となるように粉砕、分級し、規定の
配合割合となるように混合・混練して、材料の湿分が１
％以下となるように乾燥等して製造した。なお、湿分１
％以下としたのは溶射材料が搬送ガスによる輸送途中で
凝集し、不均一粒とならないようにするためである。EXAMPLES Examples of the CaO-SiO 2 based thermal spray material of the present invention will be described. Table 1 shows the chemical compositions of the raw materials used for producing the CaO—SiO 2 -based thermal spray material.
Showing a comparative example with the present invention examples of -SiO 2 based spray material. The sprayed material is pulverized and classified so as to have a specified particle size, and mixed and kneaded so as to have a specified mixing ratio, so that the material has a moisture
% Or less. In addition, moisture 1
% Or less in order to prevent the thermal spray material from agglomerating during transportation by the carrier gas and becoming non-uniform particles.
【００１０】[0010]
【表１】 [Table 1]
【００１１】[0011]
【表２】 [Table 2]
【００１２】[0012]
【表３】 [Table 3]
【００１３】[0013]
【表４】 [Table 4]
【００１４】表２〜表４において、 ＊１ 石灰石が加熱減量（ＩｇＬｏｓｓ）することを考
慮して、ＳｉＯ2質材料の配合割合は、石灰石１００重
量部に対する重量部で示した。 ＊２ 付着率：溶射時にれんがに付着した割合（ｗｔ
％）＝（れんがに付着した量）／供給量×１００ ＊３ 耐食性：スラグ溶射方式によった（１８００℃×
５分，侵食された寸法（ｍｍ）を示し、数値が大きいほ
ど耐食性が劣る）。In Tables 2 to 4, * 1 In consideration of the fact that limestone loses heat (IgLoss), the mixing ratio of the SiO 2 material is shown in parts by weight based on 100 parts by weight of limestone. * 2 Adhesion rate: ratio of adhering to brick during thermal spraying (wt
%) = (Amount adhered to brick) / supply amount × 100 * 3 Corrosion resistance: determined by slag spraying method (1800 ° C. ×
5 min, shows the eroded dimension (mm), the larger the numerical value, the lower the corrosion resistance.)
【００１５】＊４ ◎：溶融性、耐食性共に非常に良
好、△：溶融性は非常に良好であるが、耐食性が悪い、
×：溶融性、耐食性共に悪い。* 4 ◎: Very good in both meltability and corrosion resistance, Δ: Very good in meltability but poor in corrosion resistance,
X: Both meltability and corrosion resistance are poor.
【００１６】表２〜４から、本発明例のＣａＯ−ＳｉＯ
2 系溶射材料は、ＣａＯ量、ＳｉＯ 2量の何れかが本発
明範囲外である比較例に比べて、溶融性（付着率）、耐
食性、精錬効果が顕著に優れていることが分かる。As shown in Tables 2 to 4, the CaO-SiO of the present invention example
TwoThe system thermal spray material is CaO content, SiO TwoAny of the quantities
Meltability (adhesion rate),
It can be seen that the food quality and the refining effect are remarkably excellent.
【００１７】[0017]
【発明の効果】本発明のＣａＯ−ＳｉＯ2 系溶射材料を
使用することにより、下記の効果が奏される。 （１）高耐火度を有する緻密質溶射体が形成されるの
で、従来の溶射材料に比して高耐食性が得られ、耐用性
が向上する。The use of CaO-SiO 2 based spray material of the present invention, which achieves the following effects. (1) Since a dense thermal spray having a high fire resistance is formed, high corrosion resistance is obtained as compared with a conventional thermal spray material, and durability is improved.
【００１８】（２）高耐食性が得られることにより補修
頻度の低減が図れるので、炉等の稼働率が向上し、補修
コストを低減することができる。 （３）金属精錬炉の内張りに適用することにより、Ｃａ
Ｏ活性度の高い内張り耐火物が得られので、Ｐ、Ｓの吸
着による金属の精錬効果を高めることができる。(2) Since high corrosion resistance is obtained, the frequency of repair can be reduced, so that the operating rate of the furnace and the like can be improved and the repair cost can be reduced. (3) By applying to the lining of a metal smelting furnace,
Since a refractory lining having a high O activity is obtained, the metal refining effect by the adsorption of P and S can be enhanced.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 加山 恒夫 千葉県富津市新富20−１ 新日本製鐵株 式会社技術開発本部内 (72)発明者 津田 秀行 福岡県北九州市八幡西区東浜町１番１号 黒崎窯業株式会社内 (72)発明者 松尾 正孝 福岡県北九州市八幡西区東浜町１番１号 黒崎窯業株式会社内 (72)発明者 為広 泰造 兵庫県高砂市荒井町新浜１丁目３番１号 ハリマセラミック株式会社内 (72)発明者 高橋 和男 兵庫県高砂市荒井町新浜１丁目３番１号 ハリマセラミック株式会社内 (56)参考文献 特開 昭59−156967（ＪＰ，Ａ) 特開 昭63−38564（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C04B 35/66 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tsuneo Kayama 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation Technology Development Division (72) Inventor Hideyuki Tsuda 1st Higashihama-cho, Yawatanishi-ku, Kitakyushu-shi, Fukuoka No. 1 Inside Kurosaki Ceramics Co., Ltd. (72) Inventor Masataka Matsuo 1-1, Higashihama-cho, Yawatanishi-ku, Kitakyushu-shi, Fukuoka Prefecture (72) Inside Kurosaki Ceramics Co., Ltd. No. Harima Ceramics Co., Ltd. (72) Inventor Kazuo Takahashi 1-3-1, Shinhama, Arai-machi, Takasago City, Hyogo Prefecture Inside Harima Ceramics Co., Ltd. (56) References JP-A-59-1556967 (JP, A) JP-A-63 −38564 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C04B 35/66
Claims (1)
１０〜３４ｗｔ％、及びその他成分：７ｗｔ％以下から
なることを特徴とするＣａＯ−ＳｉＯ2 系溶射材料。1. CaO: 62-83 wt%, SiO 2 :
10~34wt%, and other components: CaO-SiO 2 based spray material, characterized in that it consists of the following 7 wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5338011A JP3018056B2 (en) | 1993-12-28 | 1993-12-28 | CaO-SiO2 spray material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5338011A JP3018056B2 (en) | 1993-12-28 | 1993-12-28 | CaO-SiO2 spray material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07187828A JPH07187828A (en) | 1995-07-25 |
| JP3018056B2 true JP3018056B2 (en) | 2000-03-13 |
Family
ID=18314114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5338011A Expired - Fee Related JP3018056B2 (en) | 1993-12-28 | 1993-12-28 | CaO-SiO2 spray material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3018056B2 (en) |
-
1993
- 1993-12-28 JP JP5338011A patent/JP3018056B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07187828A (en) | 1995-07-25 |
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