JPH04193771A - Powdery dry baking material - Google Patents
Powdery dry baking materialInfo
- Publication number
- JPH04193771A JPH04193771A JP2320722A JP32072290A JPH04193771A JP H04193771 A JPH04193771 A JP H04193771A JP 2320722 A JP2320722 A JP 2320722A JP 32072290 A JP32072290 A JP 32072290A JP H04193771 A JPH04193771 A JP H04193771A
- Authority
- JP
- Japan
- Prior art keywords
- water
- crystallization
- weight
- baking
- repair
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title abstract description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000002425 crystallisation Methods 0.000 claims abstract description 19
- 230000008025 crystallization Effects 0.000 claims abstract description 19
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 16
- 235000013312 flour Nutrition 0.000 claims abstract description 15
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 14
- 239000005871 repellent Substances 0.000 claims abstract description 13
- 239000011819 refractory material Substances 0.000 claims abstract description 12
- 229920002545 silicone oil Polymers 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 150000001875 compounds Chemical class 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 235000013339 cereals Nutrition 0.000 abstract 2
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 230000002940 repellent Effects 0.000 abstract 2
- 229910004844 Na2B4O7.10H2O Inorganic materials 0.000 abstract 1
- 230000008439 repair process Effects 0.000 description 31
- 238000005507 spraying Methods 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 229910002012 Aerosil® Inorganic materials 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- -1 Na2S iO3.9H20 etc. Chemical class 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 101001044869 Shewanella frigidimarina (strain NCIMB 400) Ice-binding protein 1 Proteins 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- VDQVEACBQKUUSU-UHFFFAOYSA-M disodium;sulfanide Chemical compound [Na+].[Na+].[SH-] VDQVEACBQKUUSU-UHFFFAOYSA-M 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 230000003075 superhydrophobic effect Effects 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］
本発明は金属精錬炉等の冶金工業炉の局部損傷部を熱間
にて短時間に補修するための粉末状乾式焼付材に関する
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a powder dry baking material for repairing locally damaged parts of metallurgical industrial furnaces such as metal smelting furnaces in a short time under hot conditions.
［従来の技術］ 現在、金属精錬炉の熱間補修方法としては■吹付補修； ■吹付による流し込み補修； ■焼付材等による焼付は補修、 等が実施されている。[Conventional technology] Currently, the hot repair methods for metal smelting furnaces include: ■ Spraying repair; ■Pouring repair by spraying; ■Repair the burning due to burning materials, etc. etc. are being implemented.
吹付補修は耐火骨材にリン酸塩、珪酸塩、アルミナセメ
ント等の化学結合剤を添加したものを１０〜２０％の水
分旦で吹付けている。補修量は２０〜２００ ｋｇ／分
で実施されている。In the spraying repair, fireproof aggregate with a chemical binder such as phosphate, silicate, or alumina cement added is sprayed at a moisture content of 10 to 20%. The repair rate is 20 to 200 kg/min.
吹付による流し込みも吹付補修と同様に過剰の水分を添
加し、流し込むようにして補修するものである。Similar to spray repair, pouring by spraying involves adding excess moisture and pouring it into the repair.
焼付補修は水系と非水系に分けることができ、水系は補
修直前にフレコンパツク中に吹付は流し込みにより泥漿
状態の耐火物を形成しておき、補修時にこのフレコンパ
ツクを投入して焼付を行うものである。非水系はクール
ピッチあるいはフェノール等の有機樹脂を粉末状で添加
したもの、あるいは加熱溶融して固形化したものを投入
して焼付を行うものである。Baking repairs can be divided into water-based and non-aqueous systems. Water-based repairs involve forming a slurry-like refractory by spraying or pouring into a flexible container pack immediately before repair, and then pouring this flexible container pack in during the repair to perform baking. It is. Non-aqueous systems are those in which cool pitch or organic resins such as phenol are added in powder form, or those that have been heated and melted to solidify are added for baking.
しかし、上述の従来法はそれぞれ以下に記載するような
欠点がある：
（ａ）吹付及び吹付流し込み方法は補修時間に１０〜２
０分間の時間を要する。焼付時間は４〜５分＝２−
間と短いか、合計の補修時間は１５へ２５分間と長い。However, each of the above-mentioned conventional methods has drawbacks as described below: (a) Spraying and spray pouring methods increase the repair time by 10 to 2
It takes 0 minutes. The baking time is short at 4 to 5 minutes = 2-2 minutes, but the total repair time is long at 15 to 25 minutes.
（ｌ〕）焼イ」方法（水系）は補修に要する時間は極め
て短く、また、焼付時間も５分程度と短いか、炉前にて
泥漿を形成するために、これに１０〜２０分間の時間を
必要とする。また、泥漿中て粗粒か沈降し易く、補修層
が均一とならない。非水系の場合には、補修に要する時
間は極めて短いが、しかし、焼（＝１に２０ ”□ ６
０分間の時間を必要とする１゜このために、合計の補修
時間は長くなる。(l) The baking method (water-based) requires an extremely short time for repair, and the baking time is only about 5 minutes. It takes time. In addition, coarse particles tend to settle in the slurry, making the repair layer uneven. In the case of non-aqueous systems, the time required for repair is extremely short;
This requires a time of 0 minutes, which increases the total repair time.
このように従来法の欠点を改良するために本発明者らは
先に、粒度調整された耐火材料４０〜９０重量部に、結
晶水を３０重量％以上含む１種または２種以」二の化合
物１０〜６０重量部を添加してなる粉末状焼付補修材並
びに上記配合に更に水を５〜１０重量部添加してなる練
土状焼付補修材を提唱したく特開平２−２６８７４号公
報）。In order to improve the drawbacks of the conventional method, the present inventors first added 40 to 90 parts by weight of a refractory material whose particle size was adjusted to 40 to 90 parts by weight of one or more types of water containing crystallization water of 30% by weight or more. We would like to propose a powdered baked-on repair material made by adding 10 to 60 parts by weight of a compound, and a clay-like baked-on repair material made by further adding 5 to 10 parts by weight of water to the above formulation (Japanese Patent Application Laid-open No. 2-26874). .
［発明が解決しようとする課題］
しかし、結晶水を含む化合物をバインダーとして使用す
る上記焼付補修材はその１重用量が多く、耐食性強度の
面で弱く、用途によっては問題となることもある。[Problems to be Solved by the Invention] However, the above-mentioned baked-on repair material that uses a compound containing water of crystallization as a binder has a large weight per unit weight and is weak in terms of corrosion resistance strength, which may cause problems depending on the application.
また、結晶水を含む化合物と骨材の反応によりバインダ
ーのケル化か生して展開不良を起こず可能性もある。In addition, there is a possibility that the binder may be kelized due to the reaction between the compound containing crystal water and the aggregate, resulting in poor development.
更に、結晶水を含む化音物は潮解性を有し、該化合物か
焼イ」材中で吸湿、固化して展開不良を起こす可能性も
ある。Furthermore, compounds containing water of crystallization have deliquescent properties, and may absorb moisture and solidify in the calcined material, resulting in poor development.
従って、本発明の目的は結晶水を含む化合物をバインダ
ーとする焼付補修材の耐食性を向上し、更に、経時変化
か少なく、長期保存可能な粉末状乾式焼イ」材を提供す
ることを目的とする。Therefore, an object of the present invention is to improve the corrosion resistance of a baked repair material using a compound containing water of crystallization as a binder, and to provide a dry baked repair material in powder form that shows little change over time and can be stored for a long period of time. do.
［課題を解決するための手段］
即ち、本発明は、粒度調整された耐火材料４０〜９５重
量％及び結晶水を３０重量％以上含む化合物の１種また
は２種以上５〜６０重量％よりなる粉末状混合物１００
重量部と、疎水性シリカフラワー及び／または撥水性シ
リコンオイル００１〜１．０重電部とを含有してなる粉
末状乾式焼付材に係る。[Means for Solving the Problems] That is, the present invention consists of 40 to 95% by weight of a particle-sized refractory material and 5 to 60% by weight of one or more compounds containing 30% by weight or more of water of crystallization. powder mixture 100
The present invention relates to a powdered dry baking material containing 001 to 1.0 parts by weight and 001 to 1.0 parts by weight of hydrophobic silica flour and/or water-repellent silicone oil.
１作 用］
本発明の粉末状焼付補修材は結晶水を含有する化合物及
び耐火材料よりなる粉末状混合物と、疎水性シリカフラ
ワー及び／または撥水性シリコンオフイルを混練したも
のであり、この混練物を紙袋またはフレコンハック等に
入れ、赤熱状態の工業炉の中に投入することがてきる。1 Effect] The powdered baked-on repair material of the present invention is obtained by kneading a powdery mixture consisting of a compound containing water of crystallization and a refractory material, and hydrophobic silica flour and/or water-repellent silicone oil. Items can be placed in paper bags or flexible container hacks, and placed into a red-hot industrial furnace.
この加熱により前記化な物中の結晶水は脱水されるか、
この結晶水と疎水性シリカフラワー及び／または撥水性
シリコンオイルとはなしまず、はじけて焼付材に運動エ
ネルへｍ−を与え、良好な展開性を付与して泥漿状態と
なり、炉内の損傷部に広がり、補修材か強固に結合した
状態となる。Is the crystal water in the chemical dehydrated by this heating?
When this water of crystallization and hydrophobic silica flour and/or water-repellent silicone oil separate, they first burst, imparting kinetic energy to the baking material, giving it good spreadability and turning into a slurry, which spreads over damaged areas inside the furnace. The repair material will spread and become firmly bonded.
従って、炉前にて泥漿を形成する必要かなく且つ短時間
で焼付を行うことかできる。また、疎水性シリカフラワ
ー及び／または撥水性シリカフラワーは空気中の湿分あ
るいは焼（（Ｉ補修材中の遊離の水等の存在を防止する
ため、粉末状焼付補修材の保管性も向上する。Therefore, it is not necessary to form a slurry in front of the oven, and baking can be carried out in a short time. In addition, hydrophobic silica flour and/or water-repellent silica flour prevents moisture in the air or the presence of free water in the repair material, improving the storage stability of the powdered repair material. .
＋発明に使用する耐火材料はアルミナ、シャモツ１〜、
ＳｉＣ、マクネシア、ドロマイト、Ｓ ｉ ０２等の一
般に耐火材料として用いられているものが使用てきる。+The fireproof materials used in the invention are alumina, shamoz 1~,
Commonly used refractory materials such as SiC, Macnesia, dolomite, and S i 02 can be used.
耐火材料の配合量は４０〜９５重量％の範囲内であるか
、実際の使用量は結晶水を含む化合物の配合量に依存す
る。また、耐火材料の粒度は通常用いられている耐火骨
材の粒度範囲内にあれば特に限定されるものではない。The content of the refractory material is within the range of 40 to 95% by weight, and the actual amount used depends on the content of the compound containing water of crystallization. Further, the particle size of the refractory material is not particularly limited as long as it is within the particle size range of commonly used refractory aggregates.
なお、耐火材料の１部をシリカフラワー、アルミナ超微
粉等の耐火性超微粉とすることもできる。Note that a part of the refractory material may be made of refractory ultrafine powder such as silica flour or alumina ultrafine powder.
本発明に使用する結晶水を含有する化合物は化金物に含
まれる結晶水量か３０重量％以−１＝であることが望ま
しい。化合物の結晶水量が３０重量％未満では化合物の
添加量を多くしなければならず、耐食性の低下等の問題
を生ずるなめに好ましくない。It is desirable that the compound containing water of crystallization used in the present invention has an amount of water of crystallization contained in the metal compound of 30% by weight or more. If the amount of water of crystallization of the compound is less than 30% by weight, the amount of the compound added must be increased, which is not preferable because it may cause problems such as a decrease in corrosion resistance.
また、結晶水を含む化合物は１００℃まて昇温する間に
、本発明の粉末状乾式焼付材１００重量％に対して５〜
４０重量％の水を放出することが好ましい。In addition, the compound containing crystal water is added in an amount of 5 to 5% by weight based on 100% by weight of the powdered dry baking material of the present invention while the temperature is raised to 100°C.
Preferably, 40% by weight of water is released.
上記の条件を満足する化合物としては硼酸塩例えはＮａ
２Ｂ、Ｏ，・１０Ｈ２０等、リン酸塩例えはＮａ２Ｐ０
６’ １． ＯＨ２Ｏ、Ｎａ２ＨＰ０． １２Ｈ□０１
Ｎａ、ＰＯ４’ １２Ｈ２０，Ｌｉ、ＰＯ，’ １２Ｉ
４２０、Ｎａ４Ｐ ２０７ ・１０ Ｈ２０、Ａり、〈
Ｐ ２０７）３・１０８２０等、珪酸塩例えばＮａ２Ｓ
ｉＯ３・９Ｈ２０等、硫酸塩例えばＮａ２ｓ Ｏ＋ 、
１０ Ｈ２０、Ｍｇ５Ｏ１７Ｈ２０、Ａｒ１（Ｓ Ｏ４
）３・１８Ｈ２０、ＫＡ（（ＳＯ，＞２−１２Ｈ２０、
炭酸塩例えばＮ ａ ２ ＣＯ２・１０Ｈ２０等を使用
することができる。Borate is an example of a compound that satisfies the above conditions.
2B, O, ・10H20, etc., phosphate analogy is Na2P0
6' 1. OH2O, Na2HP0. 12H□01
Na, PO4' 12H20, Li, PO,' 12I
420, Na4P 207 ・10 H20, Ari, <
P 207) 3.10820 etc., silicates such as Na2S
iO3.9H20 etc., sulfates such as Na2s O+,
10 H20, Mg5O17H20, Ar1(S O4
)3・18H20,KA((SO,>2−12H20,
Carbonates such as Na2CO2.10H20 can be used.
結晶水を３０重量％以上含む化合物の配合量は５〜６０
重量％が望ましい。該配合量が５重量％未満の場合には
泥漿の形成が困難となるために好ましくなく、また、配
合量が６０重量％を超えると耐火骨材の配合量が少なく
なり、施工景が実質上減少するために好ましくない。The compounding amount of the compound containing 30% by weight or more of water of crystallization is 5 to 60%.
% by weight is preferred. If the blending amount is less than 5% by weight, it is unfavorable because it will be difficult to form a slurry, and if the blending amount exceeds 60% by weight, the blending amount of fireproof aggregate will be small, and the construction appearance will be substantially deteriorated. Unfavorable because it decreases.
結晶水を３０重量％以上含む化合物は展開性を付与する
と共に結合剤として働く。また、上述の化合物は２種以
上を併用してもよい。A compound containing 30% by weight or more of water of crystallization not only imparts developability but also functions as a binder. Furthermore, two or more of the above-mentioned compounds may be used in combination.
本発明においては、」ユ述の耐火材料及び結晶水を３０
重量％以」−含む化合物よりなる粉末状混合物に、更に
、疎水性シリカフラワー及び／または撥水性シリコンオ
イルを添加して補修材の展開性を向上させる。これは、
解離した結晶水と疎水性シリカフラワー及び／または撥
水性シリコンオイルとがなじまず、はじけて粉末状焼付
補修材に運動エネルギーを与えて展開性を良好にするた
めである。また、疎水性シリカフラワー及び／または撥
水性シリコンオイルは空気中の湿分あるいは粉末状焼付
補修材中の遊離の水等を防止するため、焼付材の保管性
が良くなる。疎水性シリカフラワー及び／または撥水性
シリコンオイルの配合量は前記粉末状混合物１００重量
部当たり０．０１〜１．０重量部の範囲内である。In the present invention, the refractory material and crystal water described in
The spreadability of the repair material is improved by adding hydrophobic silica flour and/or water-repellent silicone oil to the powdered mixture comprising the compound containing 1% by weight or more. this is,
This is because the dissociated water of crystallization and the hydrophobic silica flour and/or the water-repellent silicone oil do not mix and burst, imparting kinetic energy to the powdered baking repair material and improving its spreadability. Furthermore, the hydrophobic silica flour and/or the water-repellent silicone oil prevent moisture in the air or free water in the powdered baked-in repair material, thereby improving the storage properties of the baked-in repair material. The amount of hydrophobic silica flour and/or water-repellent silicone oil is within the range of 0.01 to 1.0 parts by weight per 100 parts by weight of the powder mixture.
本発明の粉末状乾式焼付材に使用可能な疎水性シリカフ
ラワーとしては例えば超疎水性シリカ・タラノックス５
００（グンゼ産業株式会社製）、疎水性アエロジル（日
本アエロジル株式会社製）等を例示することができ、ま
た、撥水性シリコンオイルとしては例えばＡＦＰ−１（
信越化学工業株式会社製）等を例示することができるが
、これらに限定されるものではない。Examples of the hydrophobic silica flour that can be used in the powdered dry baking material of the present invention include superhydrophobic silica Taranox 5.
00 (manufactured by Gunze Sangyo Co., Ltd.), hydrophobic Aerosil (manufactured by Nippon Aerosil Co., Ltd.), etc. Examples of the water-repellent silicone oil include AFP-1 (manufactured by Japan Aerosil Co., Ltd.).
(manufactured by Shin-Etsu Chemical Co., Ltd.), but is not limited to these.
［実 施 例］
以下に実施例を挙げて本発明の粉末状乾式焼付材を更に
説明する。[Example] The powdery dry baking material of the present invention will be further explained below with reference to Examples.
実施例
以下の第１表に記載する配合割合て本発明品及び従来品
の焼付材を作製し、３００℃鉄板上での展開性を試験し
た。Examples Baking materials of the present invention and conventional products were prepared using the compounding ratios shown in Table 1 below, and their spreadability on a 300° C. iron plate was tested.
試験結果を第１表に併記する。The test results are also listed in Table 1.
［発明の効果］
本発明の粉末状乾式焼付材は耐火材料と結晶水を３０重
量％以上含む化合物の他に疎水性シリカフラワー及び／
まなは撥水性シリコンオイルを添加・配合しているので
焼付材の展開性を顕著に向上することができる。[Effects of the Invention] The powdered dry baking material of the present invention contains hydrophobic silica flour and/or in addition to a fireproof material and a compound containing 30% by weight or more of water of crystallization.
Since Mana contains water-repellent silicone oil, it can significantly improve the spreadability of the baking material.
特許出願人 品川白煉瓦株式会社Patent applicant Shinagawa White Brick Co., Ltd.
Claims (1)
３０重量％以上含む化合物の１種または２種以上５〜６
０重量％よりなる粉末状混合物１００重量部と、疎水性
シリカフラワー及び／または撥水性シリコンオイル０．
０１〜１．０重量部とを含有してなる粉末状乾式焼付材
。One or more compounds containing 40 to 95% by weight of particle-sized refractory material and 30% by weight or more of crystallization water 5 to 6
100 parts by weight of a powder mixture consisting of 0% by weight, and 0% by weight of hydrophobic silica flour and/or water-repellent silicone oil.
01 to 1.0 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2320722A JPH07106945B2 (en) | 1990-11-27 | 1990-11-27 | Dry dry baking powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2320722A JPH07106945B2 (en) | 1990-11-27 | 1990-11-27 | Dry dry baking powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04193771A true JPH04193771A (en) | 1992-07-13 |
| JPH07106945B2 JPH07106945B2 (en) | 1995-11-15 |
Family
ID=18124597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2320722A Expired - Fee Related JPH07106945B2 (en) | 1990-11-27 | 1990-11-27 | Dry dry baking powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07106945B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53144912A (en) * | 1977-05-23 | 1978-12-16 | Harima Refractories Co Ltd | Vibration molding material |
-
1990
- 1990-11-27 JP JP2320722A patent/JPH07106945B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53144912A (en) * | 1977-05-23 | 1978-12-16 | Harima Refractories Co Ltd | Vibration molding material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07106945B2 (en) | 1995-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |