JPH06212516A - Production of ceramic fiber - Google Patents
Production of ceramic fiberInfo
- Publication number
- JPH06212516A JPH06212516A JP4339040A JP33904092A JPH06212516A JP H06212516 A JPH06212516 A JP H06212516A JP 4339040 A JP4339040 A JP 4339040A JP 33904092 A JP33904092 A JP 33904092A JP H06212516 A JPH06212516 A JP H06212516A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- weight
- fiber
- melt
- ash
- 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
- 239000000835 fiber Substances 0.000 title claims abstract description 36
- 239000000919 ceramic Substances 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000010883 coal ash Substances 0.000 claims abstract description 15
- 239000002956 ash Substances 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000010802 sludge Substances 0.000 claims abstract description 11
- 239000000155 melt Substances 0.000 claims description 15
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 10
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 238000009987 spinning Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 10
- 239000000377 silicon dioxide Substances 0.000 abstract description 6
- 229910052681 coesite Inorganic materials 0.000 abstract description 5
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 5
- 229910052682 stishovite Inorganic materials 0.000 abstract description 5
- 229910052905 tridymite Inorganic materials 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 3
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 238000002074 melt spinning Methods 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 11
- 239000002440 industrial waste Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- -1 Deikite Chemical compound 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052850 kyanite Inorganic materials 0.000 description 1
- 239000010443 kyanite Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Inorganic Fibers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、産業廃棄物である石炭
灰とアルミニウム残灰及び／又はアルミニウムスラッジ
を原料とし、ショットが少なく、熱収縮の小さい、優れ
た耐熱性セラミック繊維の製造法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an excellent heat-resistant ceramic fiber, which is produced from coal ash and aluminum residual ash and / or aluminum sludge, which are industrial wastes, as a raw material, has a small amount of shots and a small heat shrinkage .
【０００２】[0002]
【従来の技術】石炭灰は、微粉炭燃焼の際の灰分が半融
状態となったもので、産業廃棄物の１つであり、有効利
用が模索されている。2. Description of the Related Art Coal ash is one in which the ash content in pulverized coal combustion is in a semi-molten state and is one of industrial wastes, and its effective utilization is being sought.
【０００３】従来、石炭灰を主原料とした繊維として
は、これに成分補正原料としてSiO2、アルカリ土類金属
酸化物等を添加し、溶融、紡糸したロックウールクラス
の無機繊維がある。しかしながら、このような無機繊維
は、耐熱性に劣り、弾性がなく脆いという欠点を有して
いた。Conventionally, as a fiber mainly made of coal ash, there is an inorganic fiber of rock wool class which is obtained by adding SiO 2 , alkaline earth metal oxide and the like as a raw material for component correction, and melting and spinning. However, such an inorganic fiber has a drawback that it is inferior in heat resistance, has no elasticity, and is brittle.
【０００４】一方、通常のセラミック繊維は、Al2O3 と
SiO2を主体とした原料を高温で溶融し、生成した融液を
ブローイング法やスピニング法で繊維化することにより
得られる。On the other hand, normal ceramic fibers are Al 2 O 3 and
It is obtained by melting a raw material mainly composed of SiO 2 at a high temperature, and forming a melt into a fiber by a blowing method or a spinning method.
【０００５】しかしながら、これらの原料として、比較
的高純度の窯業原料、例えばバイヤーアルミナ、シリマ
ナイト、カイヤナイト、デイカイト、カオリン、珪石等
が使用されるため、費用がかかり、不経済である。ま
た、このようなAl2O3-SiO2系のセラミック繊維ではAl2O
3 の含有量が多い程耐熱性に優れ、Al2O3 がSiO2より少
ないと十分な耐熱性が得られない。従って、十分な耐熱
性を得るためには、Al2O 3 の含有量を多くする必要があ
るが、このようにすると、融液の粘度が低下すると共に
表面張力が増大し、紡糸の際にショットが多量に生成し
（４０μm 以上のものが４５〜５５重量％）、繊維の歩
留が低下する。また、ショットを多く含む繊維は、断熱
性が悪く、更にそれが脱落し、他の部品等を傷付けると
いう欠点を有する。However, comparing these raw materials,
High-purity ceramic raw materials, such as Bayer alumina and Silyma
Knight, Kyanite, Deikite, Kaolin, silica stone, etc.
Is used, it is expensive and uneconomical. Well
Al like this2O3-SiO2Al in the ceramic fibers2O
3The higher the content of Al, the better the heat resistance,2O3Is SiO2Less than
Without it, sufficient heat resistance cannot be obtained. Therefore, sufficient heat resistance
In order to obtain the2O 3It is necessary to increase the content of
However, if this is done, the viscosity of the melt will decrease and
The surface tension increases and a lot of shots are generated during spinning.
(45-55% by weight of 40 μm or more), fiber length
The stay is reduced. Also, the fibers that contain a lot of shots are insulated
If it is bad and it falls off and damages other parts etc.
It has a drawback.
【０００６】また、通常のセラミック繊維は、繊維径が
１〜３．５μm のものが大部分を占め、繊維長は平均１
〜３cmであるが、５mm以下の短繊維が１０〜３０重量％
も含まれている。このように５mm以下の短繊維を多く含
むものは、強度が弱く、繊維に撚りがかけ難いという欠
点を有する。Most of the ordinary ceramic fibers have a fiber diameter of 1 to 3.5 μm, and the fiber length is 1 on average.
~ 3 cm, but 10 to 30% by weight of short fibers of 5 mm or less
Is also included. As described above, those containing a large amount of short fibers of 5 mm or less have the drawbacks that the strength is weak and the fibers are difficult to twist.
【０００７】[0007]
【発明が解決しようとする課題】従って本発明の目的
は、産業廃棄物を有効に利用し、ショット量が少なく、
かつ繊維長の長い優れた耐熱性セラミック繊維を安価に
製造する方法を提供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to effectively utilize industrial waste, to reduce the shot amount,
Another object of the present invention is to provide a method for inexpensively producing an excellent heat-resistant ceramic fiber having a long fiber length.
【０００８】[0008]
【課題を解決するための手段】斯かる実状に鑑み、本発
明者は鋭意研究を行った結果、産業廃棄物たる石炭灰、
アルミニウム残灰、アルミニウムスラッジを不純物を除
去することなく特定の比率で用いれば、高価な窯業原料
を使用せず経済的であり、しかも意外にもショット含有
量が少なく、繊維が長く、耐熱性も優れているセラミッ
ク繊維が得られることを見出し本発明を完成した。In view of the above situation, the present inventor has conducted diligent research, and as a result, coal ash, which is industrial waste,
If you use aluminum residual ash and aluminum sludge in a specific ratio without removing impurities, it is economical without using expensive ceramic raw materials, and surprisingly the shot content is small, the fiber is long, and the heat resistance is also high. The inventors have completed the present invention by finding that excellent ceramic fibers can be obtained.
【０００９】すなわち、本発明は（１）石炭灰５０〜８
０重量％並びに（２）アルミニウム残灰及び／又はアル
ミニウムスラッジ２０〜５０重量％を含有し、SiO2／Al
2O3の重量比が０．７〜１．５である混合物を１７００
℃以上の融液となし、この融液から紡糸することを特徴
とするセラミック繊維の製造法を提供するものである。That is, the present invention provides (1) coal ash 50 to 8
SiO 2 / Al containing 0% by weight and (2) 20 to 50% by weight of aluminum residual ash and / or aluminum sludge.
1700 for a mixture in which the weight ratio of 2 O 3 is 0.7-1.5.
The present invention provides a method for producing a ceramic fiber, which comprises forming a melt at a temperature of not less than 0 ° C and spinning from the melt.
【００１０】本発明に用いる石炭灰は、微粉炭燃焼の火
力発電所等で、ボイラーの燃焼ガス中の微粉炭灰分を捕
集したものである。本発明で用いる石炭灰は、例えば次
の表１に示す化学組成のものである。The coal ash used in the present invention is obtained by collecting the pulverized coal ash content in the combustion gas of a boiler at a pulverized coal combustion thermal power plant or the like. The coal ash used in the present invention has, for example, a chemical composition shown in Table 1 below.
【００１１】[0011]
【表１】 [Table 1]
【００１２】石炭灰は５０〜８０重量％含有せしめる
が、この量が５０重量％未満であると表面張力が増大
し、ショットの発生量が多くなり、８０重量％を超える
と融液の粘性が高くなり細い繊維が製造できないので好
ましくない。Coal ash is contained in an amount of 50 to 80% by weight. If this amount is less than 50% by weight, the surface tension increases and the amount of shots increases, and if it exceeds 80% by weight, the viscosity of the melt is increased. It is not preferable because it becomes too high to produce fine fibers.
【００１３】本発明に用いるアルミニウム残灰は、アル
ミニウム再生工場から発生する残灰であり、一般に、次
の表２の組成をもっている。The aluminum residual ash used in the present invention is a residual ash generated from an aluminum recycling plant, and generally has the composition shown in Table 2 below.
【００１４】[0014]
【表２】 [Table 2]
【００１５】また、本発明に用いるアルミニウムスラッ
ジは、アルマイト業界からの廃棄物で表面加工のエッチ
ング工程において発生した沈澱物を脱水したものであ
り、一般に次の表３の組成をもっている。The aluminum sludge used in the present invention is a waste product from the alumite industry and is obtained by dehydrating a precipitate generated in the etching step of surface processing, and generally has the composition shown in Table 3 below.
【００１６】[0016]
【表３】 [Table 3]
【００１７】上記のアルミニウム残灰及び／又はアルミ
ニウムスラッジの含有量は、２０〜５０重量％である
が、この量が２０重量％未満であると融液の粘性が高く
なり細い繊維が紡糸しにくく、しかも繊維の耐熱性が低
下し、５０重量％を超えると融液の表面張力が増大し、
ショットの発生が多い繊維となってしまい好ましくな
い。The content of the above-mentioned aluminum residual ash and / or aluminum sludge is 20 to 50% by weight. If this amount is less than 20% by weight, the viscosity of the melt becomes high and fine fibers are difficult to spin. Moreover, the heat resistance of the fiber decreases, and when it exceeds 50% by weight, the surface tension of the melt increases,
This is not preferable because the fibers often generate shots.
【００１８】本発明においては、更に上記原料のSiO2／
Al2O3 の重量比が０．７〜１．５であることが必要であ
る。この重量比が０．７未満であると、融液の表面張力
が増大し、ショットの発生が多くなり、１．５を超える
と、融液の粘性が高くなりすぎ、紡糸繊維が太くなって
しまい、いずれも好ましくない。In the present invention, the above-mentioned raw material SiO 2 /
It is necessary that the weight ratio of Al 2 O 3 is 0.7 to 1.5. If this weight ratio is less than 0.7, the surface tension of the melt will increase and shots will often occur. If it exceeds 1.5, the viscosity of the melt will be too high and the spun fiber will become thick. Both are not preferable.
【００１９】本発明では、上記の原料を、その不純物を
除去することなく、炉により１７００℃以上の融液とす
る。このように不純物を除去しないで溶融することによ
り次の如き利点が得られる。In the present invention, the above raw material is made into a melt at 1700 ° C. or higher in a furnace without removing its impurities. By melting without removing impurities in this way, the following advantages are obtained.
【００２０】すなわち、不純物中のFe2O3 、MgO 、ZnO
は高温粘性を幾分上昇し、Al2O3分を高めたことによる
表面張力増大を緩和してさらに高温における圧縮復元性
を付与する。また、MgO は、熱収縮を低減する効果を発
揮し、PbO 、SO3 と共に表面張力の低下に寄与してい
る。更に、微量のCaO 、Sr2O 、Na2O 、K2O 、MnO は溶
融温度を下げるのに有効に作用し、ZrO2 は低熱収縮性
に、TiO2 は柔軟性を付与する。That is, Fe 2 O 3 , MgO and ZnO in impurities
Increases the high temperature viscosity to some extent and alleviates the increase in surface tension caused by increasing the Al 2 O 3 content, and imparts compressive recoverability at higher temperatures. Further, MgO exerts an effect of reducing heat shrinkage, and contributes to a decrease in surface tension together with PbO 2 and SO 3 . Furthermore, a trace amount of CaO, Sr 2 O, Na 2 O, K 2 O, and MnO act effectively to lower the melting temperature, ZrO 2 imparts low heat shrinkability, and TiO 2 imparts flexibility.
【００２１】本発明でのみみられる産業廃棄物を高度に
利用するという顕著な作用効果の一つは、アルミニウム
残灰又はアルミニウムスラッジ中の金属Alを始めとする
Ni、Cu等の微量金属によるものである。ことにアルミニ
ウム残灰中に多量に含有されている金属Alは１０-5Ω−
cmと極めて小さい比抵抗のため、通電抵抗を低下させ大
きな安定電流を流せるので溶融時間を短縮せしめ、均質
な融液の調製を可能とする。このことから電力原単位は
下げられ、融液が均質のため繊維収率が向上し結果とし
てコストを下げることができる。しかも、この金属Alは
次式の高温反応により、SiO2 を除去し、Al2O3 を増量
するため耐熱性を向上する効果的な作用を有する。One of the remarkable effects of highly utilizing the industrial waste found only in the present invention is the metal Al in the aluminum residual ash or aluminum sludge.
This is due to trace metals such as Ni and Cu. In particular, a large amount of metallic Al contained in the residual aluminum ash was 10 −5 Ω−.
Since the specific resistance is very small, such as cm, the current resistance is reduced and a large stable current can be passed, so the melting time is shortened and a homogeneous melt can be prepared. As a result, the power consumption rate can be reduced, and since the melt is homogeneous, the fiber yield can be improved, resulting in cost reduction. Moreover, this metallic Al has an effective action of improving the heat resistance by removing SiO 2 and increasing the amount of Al 2 O 3 by the high temperature reaction of the following formula.
【００２２】3SiO2 ＋ 2Al ＝ Al2O3 ＋ 3SiO↑3SiO 2 + 2Al = Al 2 O 3 + 3SiO ↑
【００２３】また、AlN はAlとの高温酸化反応によりＮ
2 を発生し、このガスの攪拌効果で融液を均質化してい
る。AlN is converted to N by high temperature oxidation reaction with Al.
2 is generated, and the melt is homogenized by the stirring effect of this gas.
【００２４】本発明における融液からの紡糸手段は、特
に制限されず常法に従って行われる。The spinning method from the melt in the present invention is not particularly limited and may be carried out according to a conventional method.
【００２５】[0025]
【発明の効果】本発明では、上述のように微量成分の複
合相乗効果により溶融温度が１７００℃以上と低く、し
かも繊維化に必要な適性粘度である２０〜３０poise が
容易に得られ、表面張力の上昇が抑えられるため、ショ
ット量の少ない、繊維長の長い、優れた耐熱性のセラミ
ック繊維を高収率で得ることができる。According to the present invention, as described above, due to the combined synergistic effect of the trace components, the melting temperature is as low as 1700 ° C. or more, and the suitable viscosity required for fiber formation is 20 to 30 poise, and the surface tension As a result, the amount of shots can be suppressed, and a ceramic fiber with a small shot amount, a long fiber length, and excellent heat resistance can be obtained in a high yield.
【００２６】[0026]
【実施例】以下、実施例を挙げて本発明を更に詳細に説
明するが本発明はこれらに限定されるものではない。The present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.
【００２７】実施例１ 下記、表４及び５に示す化学組成の石炭灰（プレアゾー
ル炭）７３．７重量％、アルミニウム残灰２６．３重量
％を混合し、顆粒状とした調合原料（SiO2／Al 2O3 ＝
１．０３）を５００KVA のエルー炉で溶融した。約３０
分で１７００℃以上の融液が生成したところで炉を傾倒
し、流出する細流に圧縮空気（７kg／cm2）を吹付け得
られたセラミック繊維の物性を表７に示す。Example 1 Coal ash (pre-azo) having the chemical composition shown in Tables 4 and 5 below.
73.7% by weight, aluminum residual ash 26.3% by weight
% To make a granulated compound raw material (SiO2/ Al 2O3=
1.03) was melted in a 500 KVA Eru furnace. About 30
The furnace is tilted when a melt of 1700 ° C or higher is generated in a minute
Compressed air (7 kg / cm2) Can be sprayed
Table 7 shows the physical properties of the obtained ceramic fibers.
【００２８】実施例２ 実施例１と同様にして、表４及び６に示す化学組成の石
炭灰（プレアゾール炭）５７．１重量％、アルミニウム
スラッジ４２．９重量％を混合し、顆粒状とした調合原
料（SiO2／Al2O3 ＝１．００）を溶融して、Al2O3 含有
量の大きいセラミック繊維が得られた。表７にその物性
を示す。Example 2 In the same manner as in Example 1, 57.1% by weight of coal ash (preazole coal) having the chemical composition shown in Tables 4 and 6 and 42.9% by weight of aluminum sludge were mixed to give a granular form. melting the blended raw material (SiO 2 / Al 2 O 3 = 1.00), large ceramic fibers of Al 2 O 3 content was obtained. Table 7 shows the physical properties.
【００２９】実施例３ 実施例１と同様にして、表４、５及び６に示す化学組成
の石炭灰（プレアゾール炭）６５．２重量％、アルミニ
ウム残灰２２．５重量％、アルミニウムスラッジ１２．
３重量％を混合し、顆粒状とした調合原料（SiO2／Al2O
3 ＝０．９０）を溶融して、Al2O3 含有量の大きいセラ
ミック繊維が得られた。表７にその物性を示す。Example 3 In the same manner as in Example 1, 65.2% by weight of coal ash (preazole coal) having the chemical composition shown in Tables 4, 5 and 6, 22.5% by weight of residual aluminum ash, and aluminum sludge 12.
3% by weight was mixed to make a granulated compound raw material (SiO 2 / Al 2 O
3 = 0.90) was melted to obtain a ceramic fiber having a high Al 2 O 3 content. Table 7 shows the physical properties.
【００３０】比較例 実施例１と同様にして、ジョージアカオリンにアルミナ
を混合し、SiO2／Al2O 3 ＝１．００なる化学組成のセラ
ミック繊維を得た。表７にその物性を示す。Comparative Example Georgia kaolin and alumina were processed in the same manner as in Example 1.
Mix, SiO2/ Al2O 3Cera with a chemical composition of 1.00
Mick fiber was obtained. Table 7 shows the physical properties.
【００３１】[0031]
【表４】 [Table 4]
【００３２】[0032]
【表５】 [Table 5]
【００３３】[0033]
【表６】 [Table 6]
【００３４】[0034]
【表７】 [Table 7]
Claims (1)
（２）アルミニウム残灰及び／又はアルミニウムスラッ
ジ２０〜５０重量％を含有し、SiO2／Al2O3 の重量比が
０．７〜１．５である混合物を１７００℃以上の融液と
なし、この融液から紡糸することを特徴とするセラミッ
ク繊維の製造法。1. A method comprising (1) 50 to 80% by weight of coal ash and (2) 20 to 50% by weight of aluminum residual ash and / or aluminum sludge, and having a weight ratio of SiO 2 / Al 2 O 3 of 0.7. A method for producing a ceramic fiber, which comprises forming a mixture having a melting point of about 1.5 to 1700 ° C. or higher and spinning the melt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4339040A JPH06212516A (en) | 1992-12-18 | 1992-12-18 | Production of ceramic fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4339040A JPH06212516A (en) | 1992-12-18 | 1992-12-18 | Production of ceramic fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06212516A true JPH06212516A (en) | 1994-08-02 |
Family
ID=18323706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4339040A Pending JPH06212516A (en) | 1992-12-18 | 1992-12-18 | Production of ceramic fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06212516A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820881A (en) * | 2014-02-08 | 2014-05-28 | 北京大学 | Method for preparing ceramic fibers from high-aluminum fly ash |
-
1992
- 1992-12-18 JP JP4339040A patent/JPH06212516A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820881A (en) * | 2014-02-08 | 2014-05-28 | 北京大学 | Method for preparing ceramic fibers from high-aluminum fly ash |
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