JPH0235710B2 - - Google Patents
Info
- Publication number
- JPH0235710B2 JPH0235710B2 JP57108522A JP10852282A JPH0235710B2 JP H0235710 B2 JPH0235710 B2 JP H0235710B2 JP 57108522 A JP57108522 A JP 57108522A JP 10852282 A JP10852282 A JP 10852282A JP H0235710 B2 JPH0235710 B2 JP H0235710B2
- Authority
- JP
- Japan
- Prior art keywords
- refractory
- molded product
- impregnating
- water
- refractory material
- 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
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 30
- 239000011819 refractory material Substances 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 22
- 239000008119 colloidal silica Substances 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 12
- 238000010304 firing Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000004094 surface-active agent Substances 0.000 claims description 11
- 239000011230 binding agent Substances 0.000 claims description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 7
- 235000019441 ethanol Nutrition 0.000 claims description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- -1 alcohol sulfates Chemical class 0.000 claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical class OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 claims description 2
- 125000005037 alkyl phenyl group Chemical group 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 238000005470 impregnation Methods 0.000 description 5
- 239000012190 activator Substances 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000005495 investment casting Methods 0.000 description 2
- 150000002576 ketones Chemical class 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011820 acidic refractory Substances 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000011822 basic refractory Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910002026 crystalline silica Inorganic materials 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000011823 monolithic refractory Substances 0.000 description 1
- 239000011821 neutral refractory Substances 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000001935 peptisation Methods 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Description
本発明は、耐火材料粉末単独または耐火材料粉
末と粘結剤を成形して得られる成形物を乾燥また
は焼成する耐火物の製造法を改良し、強度的に優
れた耐火物を製造する方法にするものである。
本発明において耐火物とは、熱の急激な変化に
耐え、同時に機械的強さが十分であるばかりでな
く、これと接触するガラス、溶融体、固体などの
侵食、摩滅などに抵抗性のあるものを云い、これ
には定形耐火物、不定形耐火物を始めとして精密
鋳造業界における鋳型が包含される。
従来、比較的強度の良い耐火物を製造する方法
としては、コロイド状シリカ液等の適当な粘結剤
を選択して使う方法、耐火材料粉末の粒度分布を
調整して用いる方法、ガラス繊維等のような補強
剤を添加する方法およびこれらを組合せる方法な
ど種々方法が検討されているが、おのおの作業性
または耐火物強度の面で不充分である。耐火物の
粘結剤としてはコロイド状シリカ液が多く使用さ
れており、精密鋳造用には不純物の少ないものが
良く使われているが、コロイド状シリカ液と耐火
材料粉末のみを混練した場合には、耐火材料の吸
水によるコロイド状シリカ液の部分ゲル化が起り
やすく、これが起ると均一な混練ができないた
め、充分な強度の耐火物を得ることが困難であつ
た。コロイド状シリカ液以外の粘結剤について言
えば、エチルシリケート、リン酸塩、ケイ酸塩等
のような種々のものが使われているが、これらは
有機物やアルカリ金属等好ましくないものの含有
量が多いため、耐火物製造時の作業性が悪く、得
られた耐火物は強度の熱的変化が大きく、その品
質管理も難しい。
一方、耐火材料粉末やガラス繊維などを選択し
て使用することは、その耐火材料の有する熱膨張
率、結晶形、粒度分布などの性質により耐火物の
強度が大きく異なることから、再現性のある耐火
物を得ることが難しく、作業の面でも細心の注意
と管理が必要である。
本発明は、これらの耐火物を製造する方法の欠
点を解消し、より優れた耐火物の製造方法を提供
せんとするものであつて、その特徴とするところ
は従来から鋳造業界で一般的に採用されている方
法、すなわち耐火材料粉末単独または耐火材料粉
末と粘結剤を成形し、得られた成形物を乾燥し、
必要に応じて焼成することからなる耐火物の製造
方法において、乾燥または焼成後の該成形物に、
コロイド状シリカ液と界面活性剤または水溶性有
機物とからなる含浸液を含浸させ、必要に応じて
乾燥または焼成することにある。従つて、本発明
の方法によれば、適当な混練装置に耐火材料粉末
または耐火材料粉末と粘結剤を入れ、水を加えて
適当な水分に調整して混練し、その混練物を成形
して乾燥し、必要に応じてさらに焼成してまず成
形物を調製する。次いでこの成形物にコロイド状
シリカ液と界面活性剤または水溶性有機物との混
合液を含浸させ、しかる後乾燥または焼成するこ
とによつて、目的とする耐火物を製造することが
できる。
本発明で使用される耐火材料としては、ガラス
状シリカ、結晶シリカ、ケイ酸マグネシウム、ケ
イ酸アルミニウム、ケイ酸ジルコニウム、ケイ酸
粘度、電融シリカ等のケイ酸質の酸性耐火物の
他、マグネシア、ドロマイト、マグクロ等の塩基
性耐火物、酸化クロム、クロマイト等の中性耐火
物、炭素、炭化ケイ素、ジルコニア等の特殊耐火
物などが例示できる。
また、コロイド状シリカ液としては、如何なる
方法で製造されたものでも使用可能であつて、例
えば、イオン交換法、解膠法、透析法などの方法
で製造されたものが本発明で使用できる。コロイ
ド状シリカ液のシリカの平均粒子径は６〜50ミリ
ミクロンの範囲が適当であるが、特に６〜15ミリ
ミクロンの範囲のものが好ましい。また、シリカ
濃度はSiO2として15重量パーセント以上のもの
が経済的で好都合である。
コロイド状シリカ液と混合する界面活性剤また
は水溶性有機物は、コロイド状シリカ液とゲル化
を起さないことが必要である。界面活性剤として
は、アニオン系または非イオン系のものであれば
良く、その中で特にジアルキルスルフオサクシネ
ート、高アルコールサルフエート（Na塩）等の
アニオン系活性剤とポリオキシエチレンアルキル
フエニルエーテル等の非イオン系活性剤が好まし
い。本発明に適する界面活性剤を商品名で例示す
れば、アニオン系活性剤としては、ネオコール、
ペレツクスOT、サンモリンOT、セドラン等が、
非イオン系活性剤としては、ノニポールＢ等があ
る。
一方、水溶性有機物としては、水に可溶な有機
物であればいずれも使用可能であつて、例えば、
メチルアルコール、エチルアルコール等のアルコ
ール類、アセトン、メチルエチルケトン等のケト
ン類、メチルアミン、エチルアミン等の一級アミ
ン類、エチレングリコール、グリセリン等の多価
アルコール類が使用される。これらの中で特にメ
チルアルコール、エチルアルコール等のアルコー
ル類及び、アセトン等のケトン類の使用が経済的
で都合がよい。
コロイド状シリカ液と上述の界面活性剤または
水溶性有機物の混合組成は、SiO2乾燥重量対界
面活性剤重量または水溶性有機物重量の比が
100：0.5から100：20の範囲、好ましくは100：２
から100：７の範囲になるよう混合することを可
とする。
なお、含浸液の耐火物への含浸割合はコロイド
状シリカ液のSiO2乾燥重量対耐火物の重量の比
で0.05：100から1.0：100の範囲であれば良いが、
0.1：100から0.3：100の範囲が作業性、経済性の
面で適当である。また、含浸液の耐火物への含浸
方法には耐火物を含浸液の中に浸漬する方法、浸
漬後加圧もしくは減圧して行なう方法等いかなる
含浸方法を用いてもかまわない。このようにして
含浸処理を受けた成形物は必要に応じ業界周知の
方法で乾燥または焼成される。
実施例 １
耐火材料粉末としてジルコンサンド及びシルコ
ンフラワーを使用し、粘結剤を用いることなく加
圧成形法にて円柱状成形物を作製し、該成形物を
48時間室温にて風乾後、110℃で20時間乾燥させ、
デシケータ中で冷却したものを含浸用テストピー
スとした。このものの重量は75ｇであつた。
SiO2濃度30重量パーセント、Na2O濃度0.42重
量パーセント、PH9.5、平均粒子径12ミリミクロ
ンのコロイド状シリカ液（商品名カタロイド−
SI30）66.2ｇとアニオン系活性剤（商品名セドラ
ン）１ｇと水32.2ｇ混合して本発明の含浸液を調
製した。この含浸液の中に上述の含浸用テストピ
ースを53分間浸漬した後、テストピースを取り出
し時の重量は81.0ｇであつた。その後110℃20時
間乾燥させ、さらに900℃１時間焼成し、デシケ
ータ中にて冷却した後、圧縮破壊強度を測定し
た。強度測定はJIS Ｒ−2206−1955に則り、加圧
破壊時の荷重を測定する方法で行なつた。その結
果を表−１に示す。
実施例 ２
実施例１と同じコロイド状シリカ液66.2ｇとア
ニオン系活性剤（商品名セドラン）0.01ｇと水
32.2ｇを混合して含浸液を調製した。この含浸液
を実施例１と同様含浸用テストピースに含浸さ
せ、さらに同じ乾燥、焼成処理理を施したものの
圧縮破壊強度を測定した。その結果を表−１に示
す。
実施例 ３
実施例１と同じコロイド状シリカ液33.4ｇとア
ニオン系活性剤（商品名セドラン）１ｇと水65.0
ｇを混合して含浸液を調製した。実施例１と同様
に、この含浸液を含浸用テストピースに含浸さ
せ、さらに同じ乾燥、焼成処理を施したものの圧
縮破壊強度を測定した。その結果を表−１に示
す。
実施例 ４
実施例１と同じコロイド状シリカ液66.2ｇとメ
チルアルコール（99％純度）１ｇと水32.2ｇを混
合して含浸液を調製した。実施例１と同様、この
含浸液を含浸用テストピースに含浸させ、さらに
同じ乾燥、焼成処理を施したものについて圧縮破
壊強度を測定した。その結果を表−１に示す。
実施例 ５
実施例１と同じ耐火材料粉末を、実施例１と同
様の方法で円柱状成形物を作製した。この成形物
を48時間室温で風乾後、110℃で20時間乾燥した
後、直ちに900℃で１時間焼成した。焼成後デシ
ケーター中で冷却したものをテストピースとし
た。
実施例１と同じ含浸液を調整し、この中に上述
のテストピースを35分間浸漬した。浸漬後110℃
で20時間乾燥し、再び900℃で１時間焼成した。
このテストピースを実施例１と同様に試験した。
その結果を表１に示す。
The present invention provides a method for producing refractories with excellent strength by improving a method for producing refractories in which a molded product obtained by molding a refractory material powder alone or a refractory material powder and a binder is dried or fired. It is something to do. In the present invention, a refractory is one that not only withstands rapid changes in heat and has sufficient mechanical strength, but also resists erosion and abrasion of glass, melt, solids, etc. that come into contact with it. This includes molds in the precision casting industry, including shaped refractories and monolithic refractories. Conventionally, methods for manufacturing refractories with relatively good strength include selecting and using an appropriate binder such as colloidal silica liquid, adjusting the particle size distribution of refractory material powder, and using glass fiber, etc. Various methods have been studied, including methods of adding reinforcing agents such as those mentioned above, and methods of combining these methods, but each method is insufficient in terms of workability or refractory strength. Colloidal silica liquid is often used as a binder for refractories, and those with few impurities are often used for precision casting, but when only colloidal silica liquid and refractory material powder are kneaded, In this method, partial gelation of the colloidal silica liquid tends to occur due to water absorption by the refractory material, and when this occurs, uniform kneading cannot be achieved, making it difficult to obtain a refractory with sufficient strength. As for binders other than colloidal silica liquid, various binders such as ethyl silicate, phosphates, silicates, etc. are used, but these contain undesirable substances such as organic substances and alkali metals. Because of this large amount, workability during refractory production is poor, and the resulting refractories exhibit large thermal changes in strength, making quality control difficult. On the other hand, selecting and using refractory material powder, glass fiber, etc. is difficult because the strength of the refractory varies greatly depending on the properties of the refractory material, such as its coefficient of thermal expansion, crystal shape, and particle size distribution. It is difficult to obtain refractories, and the work requires careful attention and management. The present invention aims to eliminate the drawbacks of these methods of manufacturing refractories and provide a more excellent method of manufacturing refractories, which is characterized by the conventional methods commonly used in the casting industry. The adopted method is to mold a refractory material powder alone or a refractory material powder and a binder, dry the resulting molded product,
In a method for producing a refractory, which comprises firing as necessary, the molded product after drying or firing,
The method involves impregnating the material with an impregnating solution consisting of a colloidal silica solution and a surfactant or a water-soluble organic substance, and drying or baking as necessary. Therefore, according to the method of the present invention, a refractory material powder or a refractory material powder and a binder are put into an appropriate kneading device, water is added to adjust the moisture content to an appropriate level, the mixture is kneaded, and the kneaded product is molded. The molded product is first prepared by drying and, if necessary, further firing. Next, the desired refractory can be produced by impregnating this molded product with a mixed solution of colloidal silica liquid and a surfactant or a water-soluble organic substance, and then drying or baking it. The refractory materials used in the present invention include silicic acidic refractories such as glassy silica, crystalline silica, magnesium silicate, aluminum silicate, zirconium silicate, silicate viscosity, and fused silica, as well as magnesia Examples include basic refractories such as dolomite and maguro, neutral refractories such as chromium oxide and chromite, and special refractories such as carbon, silicon carbide, and zirconia. Further, as the colloidal silica liquid, it is possible to use one produced by any method, for example, one produced by an ion exchange method, a peptization method, a dialysis method, etc. can be used in the present invention. The average particle diameter of the silica in the colloidal silica liquid is suitably in the range of 6 to 50 millimeters, particularly preferably in the range of 6 to 15 millimeters. Furthermore, it is economical and convenient for the silica concentration to be 15 weight percent or more as SiO 2 . The surfactant or water-soluble organic substance to be mixed with the colloidal silica liquid must not cause gelation with the colloidal silica liquid. The surfactant may be anionic or nonionic, and among these, anionic surfactants such as dialkyl sulfosuccinates, high alcohol sulfates (Na salts), and polyoxyethylene alkyl phenyls are particularly suitable. Nonionic activators such as ethers are preferred. To exemplify surfactants suitable for the present invention by trade name, examples of anionic surfactants include Neocol,
Peretskus OT, Sanmorin OT, Sedran, etc.
Nonionic surfactants include Nonipol B and the like. On the other hand, as the water-soluble organic substance, any organic substance that is soluble in water can be used, for example,
Alcohols such as methyl alcohol and ethyl alcohol, ketones such as acetone and methyl ethyl ketone, primary amines such as methylamine and ethylamine, and polyhydric alcohols such as ethylene glycol and glycerin are used. Among these, it is particularly economical and convenient to use alcohols such as methyl alcohol and ethyl alcohol, and ketones such as acetone. The mixed composition of colloidal silica liquid and the above-mentioned surfactant or water-soluble organic substance has a ratio of SiO 2 dry weight to surfactant weight or water-soluble organic substance weight.
Range from 100:0.5 to 100:20, preferably 100:2
It is possible to mix in a range of 100:7 to 100:7. Note that the impregnation ratio of the impregnating liquid into the refractory may be within the range of 0.05:100 to 1.0:100 in terms of the dry weight of SiO 2 of the colloidal silica liquid to the weight of the refractory.
A range of 0.1:100 to 0.3:100 is appropriate in terms of workability and economy. Furthermore, any method of impregnation may be used to impregnate the refractory with the impregnating liquid, such as a method in which the refractory is immersed in the impregnating liquid, or a method in which the refractory is pressurized or depressurized after immersion. The molded product thus impregnated is dried or fired, if necessary, by methods well known in the industry. Example 1 Using zircon sand and silcon flour as refractory material powder, a cylindrical molded product was produced by pressure molding without using a binder, and the molded product was
After air drying at room temperature for 48 hours, drying at 110℃ for 20 hours,
The sample cooled in a desiccator was used as a test piece for impregnation. The weight of this product was 75g. Colloidal silica liquid (trade name Cataloid-
An impregnating solution of the present invention was prepared by mixing 66.2 g of SI30), 1 g of an anionic activator (trade name: Cedran), and 32.2 g of water. After the above-mentioned test piece for impregnation was immersed in this impregnating liquid for 53 minutes, the test piece weighed 81.0 g when taken out. Thereafter, it was dried at 110°C for 20 hours, further baked at 900°C for 1 hour, and after cooling in a desiccator, the compressive fracture strength was measured. The strength was measured in accordance with JIS R-2206-1955 by measuring the load at the time of pressure failure. The results are shown in Table-1. Example 2 66.2 g of the same colloidal silica liquid as in Example 1, 0.01 g of anionic activator (trade name: Cedran), and water.
An impregnating solution was prepared by mixing 32.2 g. A test piece for impregnation was impregnated with this impregnating liquid in the same manner as in Example 1, and then subjected to the same drying and firing treatment, and its compressive fracture strength was measured. The results are shown in Table-1. Example 3 33.4 g of the same colloidal silica liquid as in Example 1, 1 g of anionic activator (trade name: Cedran), and 65.0 g of water.
An impregnating liquid was prepared by mixing g. In the same manner as in Example 1, an impregnating test piece was impregnated with this impregnating liquid and subjected to the same drying and firing treatment, and the compressive fracture strength of the piece was measured. The results are shown in Table-1. Example 4 An impregnating solution was prepared by mixing 66.2 g of the same colloidal silica liquid as in Example 1, 1 g of methyl alcohol (99% purity), and 32.2 g of water. As in Example 1, this impregnating test piece was impregnated with this impregnating liquid, and the test piece was further subjected to the same drying and firing treatment, and the compressive fracture strength was measured. The results are shown in Table-1. Example 5 Using the same refractory material powder as in Example 1, a cylindrical molded product was produced in the same manner as in Example 1. This molded product was air-dried at room temperature for 48 hours, then dried at 110°C for 20 hours, and then immediately fired at 900°C for 1 hour. After firing, the sample was cooled in a desiccator and used as a test piece. The same impregnating solution as in Example 1 was prepared, and the above test piece was immersed in it for 35 minutes. 110℃ after soaking
The mixture was dried for 20 hours and fired again at 900°C for 1 hour.
This test piece was tested in the same manner as in Example 1.
The results are shown in Table 1.
【表】【table】
【表】
なお、圧縮破壊強度は、成形物テストピース３
個の平均値である。
以上説明したように、耐火材料粉末または耐火
材料粉末と粘結剤を成形して得られる成形物を乾
燥または焼成することからなる耐火物の製造工程
において、乾燥または焼成後の該成形物にコロイ
ド状シリカ液と界面活性剤もしくは水溶性有機物
からなる含浸液を含浸させることにより、900℃
焼成のテストピースでその圧縮強度はほゞ200〜
400％に改良されており、本発明が強度面ですぐ
れた耐火物の製造方法を提供するものであること
がわかる。[Table] The compressive fracture strength is measured using molded product test piece 3.
is the average value of As explained above, in the refractory manufacturing process that involves drying or firing a molded product obtained by molding a refractory material powder or a refractory material powder and a binder, colloids are added to the molded product after drying or firing. 900℃ by impregnating with an impregnating liquid consisting of silica liquid and surfactant or water-soluble organic matter.
The compressive strength of the firing test piece is approximately 200 ~
400%, which shows that the present invention provides a method for producing refractories with excellent strength.
Claims (1)
剤を成形し、得られた成形物を乾燥、若しくは乾
燥後焼成することからなる耐火物の製造法におい
て、乾燥後または焼成後の該成形物にコロイド状
シリカ液と界面活性剤または水溶性有機物とから
なる含浸液を含浸させ、しかる後これを乾燥また
は焼成することを特徴とする耐火物の製造法。 ２ 前記の含浸液に含まれるコロイド状シリカ液
のSiO2乾燥重量対界面活性剤重量または水溶性
有機物重量の比が100：0.5から100：20の範囲に
ある特許請求の範囲第１項記載の方法。 ３ 前記の界面活性剤がジアルキルスルフオサク
シネート、高アルコールサルフエート及びポリオ
キシエチレンアルキルフエニルエーテルから選ば
れる特許請求の範囲第１項記載の方法。 ４ 前記の水溶性有機物がメチルアルコール、エ
チルアルコール、アセトン及びメチルエチルケト
ンから選ばれる特許請求の範囲第１項記載の方
法。[Scope of Claims] 1. A method for producing a refractory, which comprises molding a refractory material powder alone or a refractory material powder and a binder, and drying the obtained molded product, or firing the molded product after drying. A method for producing a refractory material, which comprises impregnating the molded product with an impregnating liquid consisting of a colloidal silica liquid and a surfactant or a water-soluble organic substance, and then drying or baking the product. 2. The ratio of the dry weight of SiO 2 of the colloidal silica liquid contained in the impregnating liquid to the weight of the surfactant or the water-soluble organic substance is in the range of 100:0.5 to 100:20. Method. 3. The method of claim 1, wherein said surfactant is selected from dialkyl sulfosuccinates, high alcohol sulfates and polyoxyethylene alkyl phenyl ethers. 4. The method of claim 1, wherein the water-soluble organic substance is selected from methyl alcohol, ethyl alcohol, acetone, and methyl ethyl ketone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57108522A JPS593082A (en) | 1982-06-25 | 1982-06-25 | Manufacture of refractories impregnated with surfactant or water-soluble organic matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57108522A JPS593082A (en) | 1982-06-25 | 1982-06-25 | Manufacture of refractories impregnated with surfactant or water-soluble organic matter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS593082A JPS593082A (en) | 1984-01-09 |
| JPH0235710B2 true JPH0235710B2 (en) | 1990-08-13 |
Family
ID=14486930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57108522A Granted JPS593082A (en) | 1982-06-25 | 1982-06-25 | Manufacture of refractories impregnated with surfactant or water-soluble organic matter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS593082A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6024920B2 (en) * | 2013-09-04 | 2016-11-16 | Ｊｆｅスチール株式会社 | Shaped refractory and method for manufacturing the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238849A (en) * | 1975-09-23 | 1977-03-25 | Nec Corp | I/o request processing system |
| JPS5713517A (en) * | 1980-06-27 | 1982-01-23 | Nippon Denso Co Ltd | Load operation inspection device |
-
1982
- 1982-06-25 JP JP57108522A patent/JPS593082A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238849A (en) * | 1975-09-23 | 1977-03-25 | Nec Corp | I/o request processing system |
| JPS5713517A (en) * | 1980-06-27 | 1982-01-23 | Nippon Denso Co Ltd | Load operation inspection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS593082A (en) | 1984-01-09 |
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